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Diffstat (limited to 'newlib/libc/sys/linux/linuxthreads')
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diff --git a/newlib/libc/sys/linux/linuxthreads/LICENSE b/newlib/libc/sys/linux/linuxthreads/LICENSE deleted file mode 100644 index 7bcca6050..000000000 --- a/newlib/libc/sys/linux/linuxthreads/LICENSE +++ /dev/null @@ -1,501 +0,0 @@ -GNU LIBRARY GENERAL PUBLIC LICENSE -********************************** - - Version 2, June 1991 - - Copyright (C) 1991 Free Software Foundation, Inc. - 59 Temple Place -- Suite 330, Boston, MA 02111-1307, USA - - Everyone is permitted to copy and distribute verbatim copies - of this license document, but changing it is not allowed. - - [This is the first released version of the library GPL. It is - numbered 2 because it goes with version 2 of the ordinary GPL.] - -Preamble -======== - - The licenses for most software are designed to take away your -freedom to share and change it. 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Here is a sample; alter the names: - - Yoyodyne, Inc., hereby disclaims all copyright interest in the library - `Frob' (a library for tweaking knobs) written by James Random Hacker. - - SIGNATURE OF TY COON, 1 April 1990 - Ty Coon, President of Vice - - That's all there is to it! - diff --git a/newlib/libc/sys/linux/linuxthreads/Makefile.am b/newlib/libc/sys/linux/linuxthreads/Makefile.am deleted file mode 100644 index 0122d668b..000000000 --- a/newlib/libc/sys/linux/linuxthreads/Makefile.am +++ /dev/null @@ -1,142 +0,0 @@ -## Process this file with automake to generate Makefile.in - -AUTOMAKE_OPTIONS = cygnus - -INCLUDES = -I$(srcdir)/../include -I$(srcdir)/machine/$(machine_dir) -I$(srcdir)/machine/generic $(NEWLIB_CFLAGS) $(CROSS_CFLAGS) $(TARGET_CFLAGS) -I$(srcdir)/.. - -LIBTOOL_VERSION_INFO = 0:0:0 - -LIB_SOURCES= \ - attr.c barrier.c condvar.c \ - events.c getcpuclockid.c getreent.c join.c lockfile.c manager.c \ - mq_notify.c oldsemaphore.c prio.c ptclock_gettime.c ptclock_settime.c \ - ptlongjmp.c pt-machine.c reent.c rwlock.c semaphore.c \ - signals.c spinlock.c sysctl.c \ - timer_create.c timer_getoverr.c timer_routines.c \ - timer_delete.c timer_gettime.c timer_settime.c \ - wrapsyscall.c - -LIB_DB_SOURCES = td_init.c td_log.c td_ta_delete.c td_ta_get_nthreads.c \ - td_ta_get_ph.c td_ta_map_id2thr.c td_ta_map_lwp2thr.c \ - td_ta_new.c td_ta_thr_iter.c td_ta_tsd_iter.c \ - td_thr_get_info.c td_thr_getfpregs.c td_thr_getgregs.c \ - td_thr_getxregs.c td_thr_getxregsize.c td_thr_setfpregs.c \ - td_thr_setgregs.c td_thr_setprio.c td_thr_setsigpending.c \ - td_thr_setxregs.c td_thr_sigsetmask.c td_thr_tsd.c \ - td_thr_validate.c td_thr_dbsuspend.c td_thr_dbresume.c \ - td_ta_setconcurrency.c td_ta_enable_stats.c \ - td_ta_reset_stats.c td_ta_get_stats.c td_ta_event_addr.c \ - td_thr_event_enable.c td_thr_set_event.c \ - td_thr_clear_event.c td_thr_event_getmsg.c \ - td_ta_set_event.c td_ta_event_getmsg.c \ - td_ta_clear_event.c td_symbol_list.c - -# Because of how libtool moves objects around, these files must be built last. -LIBADD_OBJS = mutex.$(oext) specific.$(oext) pthread.$(oext) \ - cancel.$(oext) - -ELIX_3_OBJS = \ - ptfork.$(oext) - -if ELIX_LEVEL_1 -EXTRA_OBJS = reqsyscalls.$(oext) -else -if ELIX_LEVEL_2 -EXTRA_OBJS = reqsyscalls.$(oext) -else -EXTRA_OBJS = $(ELIX_3_OBJS) -endif -endif - -SUBDIRS = machine . - -tooldir = $(tooldir) -toollibdir = $(top_toollibdir) - -libpthread_la_LDFLAGS = -version-info $(LIBTOOL_VERSION_INFO) -release newlib -no-undefined -lgcc -Xcompiler -nostdlib -Xlinker --version-script=$(srcdir)/../shared.ld `cat extra-libtool-objlist` -libthread_db_la_LDFLAGS = -version-info $(LIBTOOL_VERSION_INFO) -release newlib -no-undefined -lgcc -Xcompiler -nostdlib -Xlinker --version-script=$(srcdir)/../shared.ld - -if USE_LIBTOOL - -# objects listed later in LIBPTHREAD_OBJLISTS will override those listed earlier -extra-libtool-objlist: $(MACHINE_OBJLIST) - cat $(MACHINE_OBJLIST) | $(AWK) '{ libpthread[$$1] = $$2 }; END { for (x in libpthread) printf ("%s\n", libpthread[x]) }' > $@ - -toollib_LTLIBRARIES = libpthread.la libthread_db.la -libpthread_la_SOURCES = $(LIB_SOURCES) -libpthread_la_LIBADD = $(LIBADD_OBJS) $(EXTRA_OBJS) -## libpthread_la_DEPENDENCIES = defs.h crti.S -libpthread_la_DEPENDENCIES = $(LIBADD_OBJS) $(EXTRA_OBJS) extra-libtool-objlist -noinst_DATA=objectlist.awk.in -LIB_COMPILE = $(LTCOMPILE) - -libthread_db_la_SOURCES = $(LIB_DB_SOURCES) - -else - -toollib_LIBRARIES = libpthread.a libthread_db.a -libpthread_a_SOURCES = $(LIB_SOURCES) -libpthread_a_LIBADD = $(LIBADD_OBJS) $(EXTRA_OBJS) $(MACHINE_LIB) -## libpthread_a_DEPENDENCIES = defs.h crti.S -libpthread_a_DEPENDENCIES = $(LIBADD_OBJS) $(EXTRA_OBJS) $(MACHINE_LIB) -LIB_COMPILE = $(COMPILE) - -libthread_db_a_SOURCES = $(LIB_DB_SOURCES) - -endif # USE_LIBTOOL - -include $(srcdir)/../../../../Makefile.shared - -doc: - -install-data-local: install-toollibLIBRARIES - -rm -f $(DESTDIR)$(toollibdir)/libthread_db.so.1 - ln -s `readlink $(DESTDIR)$(toollibdir)/libthread_db.so` \ - $(DESTDIR)$(toollibdir)/libthread_db.so.1 \ - || cp $(DESTDIR)$(toollibdir)/libthread_db.so \ - $(DESTDIR)$(toollibdir)/libthread_db.so.1 - -AM_CFLAGS = -D_XOPEN_SOURCE=600 -D_GNU_SOURCE=1 -ACLOCAL_AMFLAGS = -I ../../../.. -CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host - -## PTHREAD_HEADERS=pthread.h semaphore.h - -CFLAGS_pt_initfini = -g0 -fPIC -fno-inline-functions -CFLAGS_noweak=-D__NO_WEAK_PTHREAD_ALIASES -CFLAGS_cancel=-D__NO_WEAK_PTHREAD_ALIASES -D_RPC_THREAD_SAFE_ -CFLAGS_pthread=-D__NO_WEAK_PTHREAD_ALIASES -DHAVE_Z_NODELETE - -pt-initfini.s: $(srcdir)/pt-initfini.c - $(CC) -S $(CFLAGS_pt_initfini) -finhibit-size-directive \ - $(patsubst -f%,-fno-%,$(exceptions)) -o $@ - -# We only have one kind of startup code files. 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you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Handling of thread attributes */ - -#include <errno.h> -#include <string.h> -#include <unistd.h> -#include <sys/param.h> -#include <sys/resource.h> -#include "pthread.h" -#include "internals.h" -#include <shlib-compat.h> - -int __pthread_attr_init_2_1(pthread_attr_t *attr) -{ - size_t ps = __getpagesize (); - - attr->__detachstate = PTHREAD_CREATE_JOINABLE; - attr->__schedpolicy = SCHED_OTHER; - attr->__schedparam.sched_priority = 0; - attr->__inheritsched = PTHREAD_EXPLICIT_SCHED; - attr->__scope = PTHREAD_SCOPE_SYSTEM; - attr->__guardsize = ps; - attr->__stackaddr = NULL; - attr->__stackaddr_set = 0; - attr->__stacksize = STACK_SIZE - ps; - return 0; -} - -versioned_symbol (libpthread, __pthread_attr_init_2_1, pthread_attr_init, - GLIBC_2_1); - -#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1) -int __pthread_attr_init_2_0(pthread_attr_t *attr) -{ - attr->__detachstate = PTHREAD_CREATE_JOINABLE; - attr->__schedpolicy = SCHED_OTHER; - attr->__schedparam.sched_priority = 0; - attr->__inheritsched = PTHREAD_EXPLICIT_SCHED; - attr->__scope = PTHREAD_SCOPE_SYSTEM; - return 0; -} -compat_symbol (libpthread, __pthread_attr_init_2_0, pthread_attr_init, - GLIBC_2_0); -#endif - -int pthread_attr_destroy(pthread_attr_t *attr) -{ - return 0; -} - -int pthread_attr_setdetachstate(pthread_attr_t *attr, int detachstate) -{ - if (detachstate < PTHREAD_CREATE_JOINABLE || - detachstate > PTHREAD_CREATE_DETACHED) - return EINVAL; - attr->__detachstate = detachstate; - return 0; -} - -int pthread_attr_getdetachstate(const pthread_attr_t *attr, int *detachstate) -{ - *detachstate = attr->__detachstate; - return 0; -} - -int pthread_attr_setschedparam(pthread_attr_t *attr, - const struct sched_param *param) -{ - int max_prio = __sched_get_priority_max(attr->__schedpolicy); - int min_prio = __sched_get_priority_min(attr->__schedpolicy); - - if (param->sched_priority < min_prio || param->sched_priority > max_prio) - return EINVAL; - memcpy (&attr->__schedparam, param, sizeof (struct sched_param)); - return 0; -} - -int pthread_attr_getschedparam(const pthread_attr_t *attr, - struct sched_param *param) -{ - memcpy (param, &attr->__schedparam, sizeof (struct sched_param)); - return 0; -} - -int pthread_attr_setschedpolicy(pthread_attr_t *attr, int policy) -{ - if (policy != SCHED_OTHER && policy != SCHED_FIFO && policy != SCHED_RR) - return EINVAL; - attr->__schedpolicy = policy; - return 0; -} - -int pthread_attr_getschedpolicy(const pthread_attr_t *attr, int *policy) -{ - *policy = attr->__schedpolicy; - return 0; -} - -int pthread_attr_setinheritsched(pthread_attr_t *attr, int inherit) -{ - if (inherit != PTHREAD_INHERIT_SCHED && inherit != PTHREAD_EXPLICIT_SCHED) - return EINVAL; - attr->__inheritsched = inherit; - return 0; -} - -int pthread_attr_getinheritsched(const pthread_attr_t *attr, int *inherit) -{ - *inherit = attr->__inheritsched; - return 0; -} - -int pthread_attr_setscope(pthread_attr_t *attr, int scope) -{ - switch (scope) { - case PTHREAD_SCOPE_SYSTEM: - attr->__scope = scope; - return 0; - case PTHREAD_SCOPE_PROCESS: - return ENOTSUP; - default: - return EINVAL; - } -} - -int pthread_attr_getscope(const pthread_attr_t *attr, int *scope) -{ - *scope = attr->__scope; - return 0; -} - -int __pthread_attr_setguardsize(pthread_attr_t *attr, size_t guardsize) -{ - /* The guard size must not be larger than the stack itself */ - if (guardsize >= attr->__stacksize) return EINVAL; - - attr->__guardsize = guardsize; - - return 0; -} -weak_alias (__pthread_attr_setguardsize, pthread_attr_setguardsize) - -int __pthread_attr_getguardsize(const pthread_attr_t *attr, size_t *guardsize) -{ - *guardsize = attr->__guardsize; - return 0; -} -weak_alias (__pthread_attr_getguardsize, pthread_attr_getguardsize) - -int __pthread_attr_setstackaddr(pthread_attr_t *attr, void *stackaddr) -{ - attr->__stackaddr = stackaddr; - attr->__stackaddr_set = 1; - return 0; -} -weak_alias (__pthread_attr_setstackaddr, pthread_attr_setstackaddr) - -link_warning (pthread_attr_setstackaddr, - "the use of `pthread_attr_setstackaddr' is deprecated, use `pthread_attr_setstack'") - -int __pthread_attr_getstackaddr(const pthread_attr_t *attr, void **stackaddr) -{ - /* XXX This function has a stupid definition. The standard specifies - no error value but what is if no stack address was set? We simply - return the value we have in the member. */ - *stackaddr = attr->__stackaddr; - return 0; -} -weak_alias (__pthread_attr_getstackaddr, pthread_attr_getstackaddr) - -link_warning (pthread_attr_getstackaddr, - "the use of `pthread_attr_getstackaddr' is deprecated, use `pthread_attr_getstack'") - - -int __pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize) -{ -#ifdef FLOATING_STACKS - /* We have to check against the maximum allowed stack size. This is no - problem if the manager is already started and we determined it. If - this hasn't happened, we have to find the limit outself. */ - if (__pthread_max_stacksize == 0) - __pthread_init_max_stacksize (); - - if (stacksize > __pthread_max_stacksize) - return EINVAL; -#else - /* We have a fixed size limit. */ - if (stacksize > STACK_SIZE) - return EINVAL; -#endif - - /* We don't accept value smaller than PTHREAD_STACK_MIN. */ - if (stacksize < PTHREAD_STACK_MIN) - return EINVAL; - - attr->__stacksize = stacksize; - return 0; -} -weak_alias (__pthread_attr_setstacksize, pthread_attr_setstacksize) - -int __pthread_attr_getstacksize(const pthread_attr_t *attr, size_t *stacksize) -{ - *stacksize = attr->__stacksize; - return 0; -} -weak_alias (__pthread_attr_getstacksize, pthread_attr_getstacksize) - -int __pthread_attr_setstack (pthread_attr_t *attr, void *stackaddr, - size_t stacksize) -{ - int err; - - if ((((uintptr_t) stackaddr) - & (__alignof__ (struct _pthread_descr_struct) - 1)) != 0) - err = EINVAL; - else - err = __pthread_attr_setstacksize (attr, stacksize); - if (err == 0) - { -#ifndef _STACK_GROWS_UP - attr->__stackaddr = (char *) stackaddr + stacksize; -#else - attr->__stackaddr = stackaddr; -#endif - attr->__stackaddr_set = 1; - } - - return err; -} -weak_alias (__pthread_attr_setstack, pthread_attr_setstack) - -int __pthread_attr_getstack (const pthread_attr_t *attr, void **stackaddr, - size_t *stacksize) -{ - /* XXX This function has a stupid definition. The standard specifies - no error value but what is if no stack address was set? We simply - return the value we have in the member. */ -#ifndef _STACK_GROWS_UP - *stackaddr = (char *) attr->__stackaddr - attr->__stacksize; -#else - *stackaddr = attr->__stackaddr; -#endif - *stacksize = attr->__stacksize; - return 0; -} -weak_alias (__pthread_attr_getstack, pthread_attr_getstack) - -int pthread_getattr_np (pthread_t thread, pthread_attr_t *attr) -{ - pthread_handle handle = thread_handle (thread); - pthread_descr descr; - - if (handle == NULL) - return ENOENT; - - descr = handle->h_descr; - - attr->__detachstate = (descr->p_detached - ? PTHREAD_CREATE_DETACHED - : PTHREAD_CREATE_JOINABLE); - - attr->__schedpolicy = __sched_getscheduler (descr->p_pid); - if (attr->__schedpolicy == -1) - return errno; - - if (__sched_getparam (descr->p_pid, - (struct sched_param *) &attr->__schedparam) != 0) - return errno; - - attr->__inheritsched = descr->p_inheritsched; - attr->__scope = PTHREAD_SCOPE_SYSTEM; -#ifdef _STACK_GROWS_DOWN - attr->__stacksize = (char *)(descr + 1) - (char *)descr->p_guardaddr - - descr->p_guardsize; -#else - attr->__stacksize = (char *)descr->p_guardaddr - (char *)descr; -#endif - attr->__guardsize = descr->p_guardsize; - attr->__stackaddr_set = descr->p_userstack; -#ifdef NEED_SEPARATE_REGISTER_STACK - if (descr->p_userstack == 0) - attr->__stacksize *= 2; - /* XXX This is awkward. The guard pages are in the middle of the - two stacks. We must count the guard size in the stack size since - otherwise the range of the stack area cannot be computed. */ - attr->__stacksize += attr->__guardsize; -#endif -#ifndef _STACK_GROWS_UP - attr->__stackaddr = (char *)(descr + 1); -#else - attr->__stackaddr = (char *)descr; -#endif - - return 0; -} diff --git a/newlib/libc/sys/linux/linuxthreads/barrier.c b/newlib/libc/sys/linux/linuxthreads/barrier.c deleted file mode 100644 index 1293bad85..000000000 --- a/newlib/libc/sys/linux/linuxthreads/barrier.c +++ /dev/null @@ -1,125 +0,0 @@ -/* POSIX barrier implementation for LinuxThreads. - Copyright (C) 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Kaz Kylheku <kaz@ashi.footprints.net>, 2000. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <errno.h> -#include "pthread.h" -#include "internals.h" -#include "spinlock.h" -#include "queue.h" -#include "restart.h" - -int -pthread_barrier_wait(pthread_barrier_t *barrier) -{ - pthread_descr self = thread_self(); - pthread_descr temp_wake_queue, th; - int result = 0; - - __pthread_lock(&barrier->__ba_lock, self); - - /* If the required number of threads have achieved rendezvous... */ - if (barrier->__ba_present >= barrier->__ba_required - 1) - { - /* ... then this last caller shall be the serial thread */ - result = PTHREAD_BARRIER_SERIAL_THREAD; - /* Copy and clear wait queue and reset barrier. */ - temp_wake_queue = barrier->__ba_waiting; - barrier->__ba_waiting = NULL; - barrier->__ba_present = 0; - } - else - { - result = 0; - barrier->__ba_present++; - enqueue(&barrier->__ba_waiting, self); - } - - __pthread_unlock(&barrier->__ba_lock); - - if (result == 0) - { - /* Non-serial threads have to suspend */ - suspend(self); - /* We don't bother dealing with cancellation because the POSIX - spec for barriers doesn't mention that pthread_barrier_wait - is a cancellation point. */ - } - else - { - /* Serial thread wakes up all others. */ - while ((th = dequeue(&temp_wake_queue)) != NULL) - restart(th); - } - - return result; -} - -int -pthread_barrier_init(pthread_barrier_t *barrier, - const pthread_barrierattr_t *attr, - unsigned int count) -{ - if (count == 0) - return EINVAL; - - __pthread_init_lock(&barrier->__ba_lock); - barrier->__ba_required = count; - barrier->__ba_present = 0; - barrier->__ba_waiting = NULL; - return 0; -} - -int -pthread_barrier_destroy(pthread_barrier_t *barrier) -{ - if (barrier->__ba_waiting != NULL) return EBUSY; - return 0; -} - -int -pthread_barrierattr_init(pthread_barrierattr_t *attr) -{ - attr->__pshared = PTHREAD_PROCESS_PRIVATE; - return 0; -} - -int -pthread_barrierattr_destroy(pthread_barrierattr_t *attr) -{ - return 0; -} - -int -__pthread_barrierattr_getpshared(const pthread_barrierattr_t *attr, - int *pshared) -{ - *pshared = attr->__pshared; - return 0; -} - -int -pthread_barrierattr_setpshared(pthread_barrierattr_t *attr, int pshared) -{ - if (pshared != PTHREAD_PROCESS_PRIVATE && pshared != PTHREAD_PROCESS_SHARED) - return EINVAL; - - attr->__pshared = pshared; - return 0; -} diff --git a/newlib/libc/sys/linux/linuxthreads/bits/initspin.h b/newlib/libc/sys/linux/linuxthreads/bits/initspin.h deleted file mode 100644 index af19d44e6..000000000 --- a/newlib/libc/sys/linux/linuxthreads/bits/initspin.h +++ /dev/null @@ -1,28 +0,0 @@ -/* Generic definitions for spinlock initializers. - Copyright (C) 2000, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -/* Initial value of a spinlock. Most platforms should use zero, - unless they only implement a "test and clear" operation instead of - the usual "test and set". */ -#define __LT_SPINLOCK_INIT 0 - -/* Macros for lock initializers, using the above definition. */ -#define __LOCK_INITIALIZER { 0, __LT_SPINLOCK_INIT } -#define __ALT_LOCK_INITIALIZER { 0, __LT_SPINLOCK_INIT } -#define __ATOMIC_INITIALIZER { 0, __LT_SPINLOCK_INIT } diff --git a/newlib/libc/sys/linux/linuxthreads/bits/libc-lock.h b/newlib/libc/sys/linux/linuxthreads/bits/libc-lock.h deleted file mode 100644 index 125002255..000000000 --- a/newlib/libc/sys/linux/linuxthreads/bits/libc-lock.h +++ /dev/null @@ -1,297 +0,0 @@ -/* libc-internal interface for mutex locks. LinuxThreads version. - Copyright (C) 1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#ifndef _BITS_LIBC_LOCK_H -#define _BITS_LIBC_LOCK_H 1 - -#include <pthread.h> - -/* Mutex type. */ -#if defined(_LIBC) || defined(_IO_MTSAFE_IO) -typedef pthread_mutex_t __libc_lock_t; -typedef struct { pthread_mutex_t mutex; } __libc_lock_recursive_t; -# ifdef __USE_UNIX98 -typedef pthread_rwlock_t __libc_rwlock_t; -# else -typedef struct __libc_rwlock_opaque__ __libc_rwlock_t; -# endif -#else -typedef struct __libc_lock_opaque__ __libc_lock_t; -typedef struct __libc_lock_recursive_opaque__ __libc_lock_recursive_t; -typedef struct __libc_rwlock_opaque__ __libc_rwlock_t; -#endif - -/* Type for key to thread-specific data. */ -typedef pthread_key_t __libc_key_t; - -/* Define a lock variable NAME with storage class CLASS. The lock must be - initialized with __libc_lock_init before it can be used (or define it - with __libc_lock_define_initialized, below). Use `extern' for CLASS to - declare a lock defined in another module. In public structure - definitions you must use a pointer to the lock structure (i.e., NAME - begins with a `*'), because its storage size will not be known outside - of libc. */ -#define __libc_lock_define(CLASS,NAME) \ - CLASS __libc_lock_t NAME; -#define __libc_rwlock_define(CLASS,NAME) \ - CLASS __libc_rwlock_t NAME; -#define __libc_lock_define_recursive(CLASS,NAME) \ - CLASS __libc_lock_recursive_t NAME; - -/* Define an initialized lock variable NAME with storage class CLASS. - - For the C library we take a deeper look at the initializer. For - this implementation all fields are initialized to zero. Therefore - we don't initialize the variable which allows putting it into the - BSS section. (Except on PA-RISC and other odd architectures, where - initialized locks must be set to one due to the lack of normal - atomic operations.) */ - -#if __LT_SPINLOCK_INIT == 0 -# define __libc_lock_define_initialized(CLASS,NAME) \ - CLASS __libc_lock_t NAME; -#else -# define __libc_lock_define_initialized(CLASS,NAME) \ - CLASS __libc_lock_t NAME = PTHREAD_MUTEX_INITIALIZER; -#endif - -#define __libc_rwlock_define_initialized(CLASS,NAME) \ - CLASS __libc_rwlock_t NAME = PTHREAD_RWLOCK_INITIALIZER; - -/* Define an initialized recursive lock variable NAME with storage - class CLASS. */ -#define __libc_lock_define_initialized_recursive(CLASS,NAME) \ - CLASS __libc_lock_recursive_t NAME = _LIBC_LOCK_RECURSIVE_INITIALIZER; -#define _LIBC_LOCK_RECURSIVE_INITIALIZER \ - {PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP} - -/* Initialize the named lock variable, leaving it in a consistent, unlocked - state. */ -#define __libc_lock_init(NAME) \ - (__pthread_mutex_init != NULL ? __pthread_mutex_init (&(NAME), NULL) : 0); -#define __libc_rwlock_init(NAME) \ - (__pthread_rwlock_init != NULL ? __pthread_rwlock_init (&(NAME), NULL) : 0); - -/* Same as last but this time we initialize a recursive mutex. */ -#define __libc_lock_init_recursive(NAME) \ - do { \ - if (__pthread_mutex_init != NULL) \ - { \ - pthread_mutexattr_t __attr; \ - __pthread_mutexattr_init (&__attr); \ - __pthread_mutexattr_settype (&__attr, PTHREAD_MUTEX_RECURSIVE_NP); \ - __pthread_mutex_init (&(NAME).mutex, &__attr); \ - __pthread_mutexattr_destroy (&__attr); \ - } \ - } while (0); - -/* Finalize the named lock variable, which must be locked. It cannot be - used again until __libc_lock_init is called again on it. This must be - called on a lock variable before the containing storage is reused. */ -#define __libc_lock_fini(NAME) \ - (__pthread_mutex_destroy != NULL ? __pthread_mutex_destroy (&(NAME)) : 0); -#define __libc_rwlock_fini(NAME) \ - (__pthread_rwlock_destroy != NULL ? __pthread_rwlock_destroy (&(NAME)) : 0); - -/* Finalize recursive named lock. */ -#define __libc_lock_fini_recursive(NAME) __libc_lock_fini ((NAME).mutex) - -/* Lock the named lock variable. */ -#define __libc_lock_lock(NAME) \ - (__pthread_mutex_lock != NULL ? __pthread_mutex_lock (&(NAME)) : 0); -#define __libc_rwlock_rdlock(NAME) \ - (__pthread_rwlock_rdlock != NULL ? __pthread_rwlock_rdlock (&(NAME)) : 0); -#define __libc_rwlock_wrlock(NAME) \ - (__pthread_rwlock_wrlock != NULL ? __pthread_rwlock_wrlock (&(NAME)) : 0); - -/* Lock the recursive named lock variable. */ -#define __libc_lock_lock_recursive(NAME) __libc_lock_lock ((NAME).mutex) - -/* Try to lock the named lock variable. */ -#define __libc_lock_trylock(NAME) \ - (__pthread_mutex_trylock != NULL ? __pthread_mutex_trylock (&(NAME)) : 0) -#define __libc_rwlock_tryrdlock(NAME) \ - (__pthread_rwlock_tryrdlock != NULL \ - ? __pthread_rwlock_tryrdlock (&(NAME)) : 0) -#define __libc_rwlock_trywrlock(NAME) \ - (__pthread_rwlock_trywrlock != NULL \ - ? __pthread_rwlock_trywrlock (&(NAME)) : 0) - -/* Try to lock the recursive named lock variable. */ -#define __libc_lock_trylock_recursive(NAME) __libc_lock_trylock ((NAME).mutex) - -/* Unlock the named lock variable. */ -#define __libc_lock_unlock(NAME) \ - (__pthread_mutex_unlock != NULL ? __pthread_mutex_unlock (&(NAME)) : 0); -#define __libc_rwlock_unlock(NAME) \ - (__pthread_rwlock_unlock != NULL ? __pthread_rwlock_unlock (&(NAME)) : 0); - -/* Unlock the recursive named lock variable. */ -#define __libc_lock_unlock_recursive(NAME) __libc_lock_unlock ((NAME).mutex) - - -/* Define once control variable. */ -#if PTHREAD_ONCE_INIT == 0 -/* Special case for static variables where we can avoid the initialization - if it is zero. */ -# define __libc_once_define(CLASS, NAME) \ - CLASS pthread_once_t NAME -#else -# define __libc_once_define(CLASS, NAME) \ - CLASS pthread_once_t NAME = PTHREAD_ONCE_INIT -#endif - -/* Call handler iff the first call. */ -#define __libc_once(ONCE_CONTROL, INIT_FUNCTION) \ - do { \ - if (__pthread_once != NULL) \ - __pthread_once (&(ONCE_CONTROL), (INIT_FUNCTION)); \ - else if ((ONCE_CONTROL) == PTHREAD_ONCE_INIT) { \ - INIT_FUNCTION (); \ - (ONCE_CONTROL) = !PTHREAD_ONCE_INIT; \ - } \ - } while (0) - - -/* Start critical region with cleanup. */ -#define __libc_cleanup_region_start(DOIT, FCT, ARG) \ - { struct _pthread_cleanup_buffer _buffer; \ - int _avail = (DOIT) && _pthread_cleanup_push_defer != NULL; \ - if (_avail) { \ - _pthread_cleanup_push_defer (&_buffer, (FCT), (ARG)); \ - } - -/* End critical region with cleanup. */ -#define __libc_cleanup_region_end(DOIT) \ - if (_avail) { \ - _pthread_cleanup_pop_restore (&_buffer, (DOIT)); \ - } \ - } - -/* Sometimes we have to exit the block in the middle. */ -#define __libc_cleanup_end(DOIT) \ - if (_avail) { \ - _pthread_cleanup_pop_restore (&_buffer, (DOIT)); \ - } - -/* Create thread-specific key. */ -#define __libc_key_create(KEY, DESTRUCTOR) \ - (__pthread_key_create != NULL ? __pthread_key_create (KEY, DESTRUCTOR) : 1) - -/* Get thread-specific data. */ -#define __libc_getspecific(KEY) \ - (__pthread_getspecific != NULL ? __pthread_getspecific (KEY) : NULL) - -/* Set thread-specific data. */ -#define __libc_setspecific(KEY, VALUE) \ - (__pthread_setspecific != NULL ? __pthread_setspecific (KEY, VALUE) : 0) - - -/* Register handlers to execute before and after `fork'. */ -#define __libc_atfork(PREPARE, PARENT, CHILD) \ - (__pthread_atfork != NULL ? __pthread_atfork (PREPARE, PARENT, CHILD) : 0) - -/* Functions that are used by this file and are internal to the GNU C - library. */ - -extern int __pthread_mutex_init (pthread_mutex_t *__mutex, - __const pthread_mutexattr_t *__mutex_attr); - -extern int __pthread_mutex_destroy (pthread_mutex_t *__mutex); - -extern int __pthread_mutex_trylock (pthread_mutex_t *__mutex); - -extern int __pthread_mutex_lock (pthread_mutex_t *__mutex); - -extern int __pthread_mutex_unlock (pthread_mutex_t *__mutex); - -extern int __pthread_mutexattr_init (pthread_mutexattr_t *__attr); - -extern int __pthread_mutexattr_destroy (pthread_mutexattr_t *__attr); - -extern int __pthread_mutexattr_settype (pthread_mutexattr_t *__attr, - int __kind); - -#ifdef __USE_UNIX98 -extern int __pthread_rwlock_init (pthread_rwlock_t *__rwlock, - __const pthread_rwlockattr_t *__attr); - -extern int __pthread_rwlock_destroy (pthread_rwlock_t *__rwlock); - -extern int __pthread_rwlock_rdlock (pthread_rwlock_t *__rwlock); - -extern int __pthread_rwlock_tryrdlock (pthread_rwlock_t *__rwlock); - -extern int __pthread_rwlock_wrlock (pthread_rwlock_t *__rwlock); - -extern int __pthread_rwlock_trywrlock (pthread_rwlock_t *__rwlock); - -extern int __pthread_rwlock_unlock (pthread_rwlock_t *__rwlock); -#endif - -extern int __pthread_key_create (pthread_key_t *__key, - void (*__destr_function) (void *)); - -extern int __pthread_setspecific (pthread_key_t __key, - __const void *__pointer); - -extern void *__pthread_getspecific (pthread_key_t __key); - -extern int __pthread_once (pthread_once_t *__once_control, - void (*__init_routine) (void)); - -extern int __pthread_atfork (void (*__prepare) (void), - void (*__parent) (void), - void (*__child) (void)); - - - -/* Make the pthread functions weak so that we can elide them from - single-threaded processes. */ -#ifndef __NO_WEAK_PTHREAD_ALIASES -# pragma weak __pthread_mutex_init -# pragma weak __pthread_mutex_destroy -# pragma weak __pthread_mutex_lock -# pragma weak __pthread_mutex_trylock -# pragma weak __pthread_mutex_unlock -# pragma weak __pthread_mutexattr_init -# pragma weak __pthread_mutexattr_destroy -# pragma weak __pthread_mutexattr_settype -# pragma weak __pthread_rwlock_destroy -# pragma weak __pthread_rwlock_rdlock -# pragma weak __pthread_rwlock_tryrdlock -# pragma weak __pthread_rwlock_wrlock -# pragma weak __pthread_rwlock_trywrlock -# pragma weak __pthread_rwlock_unlock -# pragma weak __pthread_key_create -# pragma weak __pthread_setspecific -# pragma weak __pthread_getspecific -# pragma weak __pthread_once -# pragma weak __pthread_initialize -# pragma weak __pthread_atfork -# pragma weak _pthread_cleanup_push_defer -# pragma weak _pthread_cleanup_pop_restore -# endif -#endif - -/* We need portable names for some functions. E.g., when they are - used as argument to __libc_cleanup_region_start. */ -#define __libc_mutex_unlock __pthread_mutex_unlock - -#endif /* bits/libc-lock.h */ diff --git a/newlib/libc/sys/linux/linuxthreads/bits/libc-tsd.h b/newlib/libc/sys/linux/linuxthreads/bits/libc-tsd.h deleted file mode 100644 index 7a532ea74..000000000 --- a/newlib/libc/sys/linux/linuxthreads/bits/libc-tsd.h +++ /dev/null @@ -1,44 +0,0 @@ -/* libc-internal interface for thread-specific data. LinuxThreads version. - Copyright (C) 1997, 1998, 1999, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#ifndef _BITS_LIBC_TSD_H -#define _BITS_LIBC_TSD_H 1 - - -/* Fast thread-specific data internal to libc. */ -enum __libc_tsd_key_t { _LIBC_TSD_KEY_MALLOC = 0, - _LIBC_TSD_KEY_DL_ERROR, - _LIBC_TSD_KEY_RPC_VARS, - _LIBC_TSD_KEY_N }; - -extern void *(*__libc_internal_tsd_get) (enum __libc_tsd_key_t) __THROW; -extern int (*__libc_internal_tsd_set) (enum __libc_tsd_key_t, - __const void *) __THROW; - -#define __libc_tsd_define(CLASS, KEY) CLASS void *__libc_tsd_##KEY##_data; -#define __libc_tsd_get(KEY) \ - (__libc_internal_tsd_get != NULL \ - ? __libc_internal_tsd_get (_LIBC_TSD_KEY_##KEY) \ - : __libc_tsd_##KEY##_data) -#define __libc_tsd_set(KEY, VALUE) \ - (__libc_internal_tsd_set != NULL \ - ? __libc_internal_tsd_set (_LIBC_TSD_KEY_##KEY, (VALUE)) \ - : ((__libc_tsd_##KEY##_data = (VALUE)), 0)) - -#endif /* bits/libc-tsd.h */ diff --git a/newlib/libc/sys/linux/linuxthreads/bits/local_lim.h b/newlib/libc/sys/linux/linuxthreads/bits/local_lim.h deleted file mode 100644 index 0a7c83706..000000000 --- a/newlib/libc/sys/linux/linuxthreads/bits/local_lim.h +++ /dev/null @@ -1,77 +0,0 @@ -/* Minimum guaranteed maximum values for system limits. Linux version. - Copyright (C) 1993, 94, 95, 96, 97, 98, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -/* The kernel header pollutes the namespace with the NR_OPEN symbol - and defines LINK_MAX although filesystems have different maxima. A - similar thing is true for OPEN_MAX: the limit can be changed at - runtime and therefore the macro must not be defined. Remove this - after including the header if necessary. */ -#ifndef NR_OPEN -# define __undef_NR_OPEN -#endif -#ifndef LINK_MAX -# define __undef_LINK_MAX -#endif -#ifndef OPEN_MAX -# define __undef_OPEN_MAX -#endif - -/* The kernel sources contain a file with all the needed information. */ -#include <linux/limits.h> - -/* Have to remove NR_OPEN? */ -#ifdef __undef_NR_OPEN -# undef NR_OPEN -# undef __undef_NR_OPEN -#endif -/* Have to remove LINK_MAX? */ -#ifdef __undef_LINK_MAX -# undef LINK_MAX -# undef __undef_LINK_MAX -#endif -/* Have to remove OPEN_MAX? */ -#ifdef __undef_OPEN_MAX -# undef OPEN_MAX -# undef __undef_OPEN_MAX -#endif - -/* The number of data keys per process. */ -#define _POSIX_THREAD_KEYS_MAX 128 -/* This is the value this implementation supports. */ -#define PTHREAD_KEYS_MAX 1024 - -/* Controlling the iterations of destructors for thread-specific data. */ -#define _POSIX_THREAD_DESTRUCTOR_ITERATIONS 4 -/* Number of iterations this implementation does. */ -#define PTHREAD_DESTRUCTOR_ITERATIONS _POSIX_THREAD_DESTRUCTOR_ITERATIONS - -/* The number of threads per process. */ -#define _POSIX_THREAD_THREADS_MAX 64 -/* This is the value this implementation supports. */ -#define PTHREAD_THREADS_MAX 1024 - -/* Maximum amount by which a process can descrease its asynchronous I/O - priority level. */ -#define AIO_PRIO_DELTA_MAX 20 - -/* Minimum size for a thread. We are free to choose a reasonable value. */ -#define PTHREAD_STACK_MIN 16384 - -/* Maximum number of POSIX timers available. */ -#define TIMER_MAX 256 diff --git a/newlib/libc/sys/linux/linuxthreads/bits/posix_opt.h b/newlib/libc/sys/linux/linuxthreads/bits/posix_opt.h deleted file mode 100644 index 54640bb56..000000000 --- a/newlib/libc/sys/linux/linuxthreads/bits/posix_opt.h +++ /dev/null @@ -1,141 +0,0 @@ -/* Define POSIX options for Linux. - Copyright (C) 1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#ifndef _POSIX_OPT_H -#define _POSIX_OPT_H 1 - -/* Job control is supported. */ -#define _POSIX_JOB_CONTROL 1 - -/* Processes have a saved set-user-ID and a saved set-group-ID. */ -#define _POSIX_SAVED_IDS 1 - -/* Priority scheduling is supported. */ -#define _POSIX_PRIORITY_SCHEDULING 1 - -/* Synchronizing file data is supported. */ -#define _POSIX_SYNCHRONIZED_IO 1 - -/* The fsync function is present. */ -#define _POSIX_FSYNC 1 - -/* Mapping of files to memory is supported. */ -#define _POSIX_MAPPED_FILES 1 - -/* Locking of all memory is supported. */ -#define _POSIX_MEMLOCK 1 - -/* Locking of ranges of memory is supported. */ -#define _POSIX_MEMLOCK_RANGE 1 - -/* Setting of memory protections is supported. */ -#define _POSIX_MEMORY_PROTECTION 1 - -/* Implementation supports `poll' function. */ -#define _POSIX_POLL 1 - -/* Implementation supports `select' and `pselect' functions. */ -#define _POSIX_SELECT 1 - -/* Only root can change owner of file. */ -#define _POSIX_CHOWN_RESTRICTED 1 - -/* `c_cc' member of 'struct termios' structure can be disabled by - using the value _POSIX_VDISABLE. */ -#define _POSIX_VDISABLE '\0' - -/* Filenames are not silently truncated. */ -#define _POSIX_NO_TRUNC 1 - -/* X/Open realtime support is available. */ -#define _XOPEN_REALTIME 1 - -/* X/Open realtime thread support is available. */ -#define _XOPEN_REALTIME_THREADS 1 - -/* XPG4.2 shared memory is supported. */ -#define _XOPEN_SHM 1 - -/* Tell we have POSIX threads. */ -#define _POSIX_THREADS 1 - -/* We have the reentrant functions described in POSIX. */ -#define _POSIX_REENTRANT_FUNCTIONS 1 -#define _POSIX_THREAD_SAFE_FUNCTIONS 1 - -/* We provide priority scheduling for threads. */ -#define _POSIX_THREAD_PRIORITY_SCHEDULING 1 - -/* We support user-defined stack sizes. */ -#define _POSIX_THREAD_ATTR_STACKSIZE 1 - -/* We support user-defined stacks. */ -#define _POSIX_THREAD_ATTR_STACKADDR 1 - -/* We support POSIX.1b semaphores, but only the non-shared form for now. */ -#define _POSIX_SEMAPHORES 1 - -/* Real-time signals are supported. */ -#define _POSIX_REALTIME_SIGNALS 1 - -/* We support asynchronous I/O. */ -#define _POSIX_ASYNCHRONOUS_IO 1 -#define _POSIX_ASYNC_IO 1 -/* Alternative name for Unix98. */ -#define _LFS_ASYNCHRONOUS_IO 1 - -/* The LFS support in asynchronous I/O is also available. */ -#define _LFS64_ASYNCHRONOUS_IO 1 - -/* The rest of the LFS is also available. */ -#define _LFS_LARGEFILE 1 -#define _LFS64_LARGEFILE 1 -#define _LFS64_STDIO 1 - -/* POSIX shared memory objects are implemented. */ -#define _POSIX_SHARED_MEMORY_OBJECTS 1 - -/* GNU libc provides regular expression handling. */ -#define _POSIX_REGEXP 1 - -/* Reader/Writer locks are available. */ -#define _POSIX_READER_WRITER_LOCKS 200912L - -/* We have a POSIX shell. */ -#define _POSIX_SHELL 1 - -/* We support the Timeouts option. */ -#define _POSIX_TIMEOUTS 200912L - -/* We support spinlocks. */ -#define _POSIX_SPIN_LOCKS 200912L - -/* The `spawn' function family is supported. */ -#define _POSIX_SPAWN 200912L - -/* We have POSIX timers. */ -#define _POSIX_TIMERS 1 - -/* The barrier functions are available. */ -#define _POSIX_BARRIERS 200912L - -/* POSIX message queues are not yet supported. */ -#undef _POSIX_MESSAGE_PASSING - -#endif /* posix_opt.h */ diff --git a/newlib/libc/sys/linux/linuxthreads/bits/pthreadtypes.h b/newlib/libc/sys/linux/linuxthreads/bits/pthreadtypes.h deleted file mode 100644 index 3ee5c4813..000000000 --- a/newlib/libc/sys/linux/linuxthreads/bits/pthreadtypes.h +++ /dev/null @@ -1,142 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -#if !defined _BITS_TYPES_H && !defined _PTHREAD_H -# error "Never include <bits/pthreadtypes.h> directly; use <sys/types.h> instead." -#endif - -#ifndef _BITS_PTHREADTYPES_H -#define _BITS_PTHREADTYPES_H 1 - -#define __need_schedparam -#include <bits/sched.h> - -/* Fast locks (not abstract because mutexes and conditions aren't abstract). */ -struct _pthread_fastlock -{ - long int __status; /* "Free" or "taken" or head of waiting list */ - int __spinlock; /* Used by compare_and_swap emulation. Also, - adaptive SMP lock stores spin count here. */ -}; - -#ifndef _PTHREAD_DESCR_DEFINED -/* Thread descriptors */ -typedef struct _pthread_descr_struct *_pthread_descr; -# define _PTHREAD_DESCR_DEFINED -#endif - - -/* Attributes for threads. */ -typedef struct __pthread_attr_s -{ - int __detachstate; - int __schedpolicy; - struct __sched_param __schedparam; - int __inheritsched; - int __scope; - size_t __guardsize; - int __stackaddr_set; - void *__stackaddr; - size_t __stacksize; -} pthread_attr_t; - - -/* Conditions (not abstract because of PTHREAD_COND_INITIALIZER */ -typedef struct -{ - struct _pthread_fastlock __c_lock; /* Protect against concurrent access */ - _pthread_descr __c_waiting; /* Threads waiting on this condition */ -} pthread_cond_t; - - -/* Attribute for conditionally variables. */ -typedef struct -{ - int __dummy; -} pthread_condattr_t; - -/* Keys for thread-specific data */ -typedef unsigned int pthread_key_t; - - -/* Mutexes (not abstract because of PTHREAD_MUTEX_INITIALIZER). */ -/* (The layout is unnatural to maintain binary compatibility - with earlier releases of LinuxThreads.) */ -typedef struct -{ - int __m_reserved; /* Reserved for future use */ - int __m_count; /* Depth of recursive locking */ - _pthread_descr __m_owner; /* Owner thread (if recursive or errcheck) */ - int __m_kind; /* Mutex kind: fast, recursive or errcheck */ - struct _pthread_fastlock __m_lock; /* Underlying fast lock */ -} pthread_mutex_t; - - -/* Attribute for mutex. */ -typedef struct -{ - int __mutexkind; -} pthread_mutexattr_t; - - -/* Once-only execution */ -typedef int pthread_once_t; - - -#ifdef __USE_UNIX98 -/* Read-write locks. */ -typedef struct _pthread_rwlock_t -{ - struct _pthread_fastlock __rw_lock; /* Lock to guarantee mutual exclusion */ - int __rw_readers; /* Number of readers */ - _pthread_descr __rw_writer; /* Identity of writer, or NULL if none */ - _pthread_descr __rw_read_waiting; /* Threads waiting for reading */ - _pthread_descr __rw_write_waiting; /* Threads waiting for writing */ - int __rw_kind; /* Reader/Writer preference selection */ - int __rw_pshared; /* Shared between processes or not */ -} pthread_rwlock_t; - - -/* Attribute for read-write locks. */ -typedef struct -{ - int __lockkind; - int __pshared; -} pthread_rwlockattr_t; -#endif - -#ifdef __USE_XOPEN2K -/* POSIX spinlock data type. */ -typedef volatile int pthread_spinlock_t; - -/* POSIX barrier. */ -typedef struct { - struct _pthread_fastlock __ba_lock; /* Lock to guarantee mutual exclusion */ - int __ba_required; /* Threads needed for completion */ - int __ba_present; /* Threads waiting */ - _pthread_descr __ba_waiting; /* Queue of waiting threads */ -} pthread_barrier_t; - -/* barrier attribute */ -typedef struct { - int __pshared; -} pthread_barrierattr_t; - -#endif - - -/* Thread identifiers */ -typedef unsigned long int pthread_t; - -#endif /* bits/pthreadtypes.h */ diff --git a/newlib/libc/sys/linux/linuxthreads/bits/sigthread.h b/newlib/libc/sys/linux/linuxthreads/bits/sigthread.h deleted file mode 100644 index 1c62d8196..000000000 --- a/newlib/libc/sys/linux/linuxthreads/bits/sigthread.h +++ /dev/null @@ -1,38 +0,0 @@ -/* Signal handling function for threaded programs. - Copyright (C) 1998, 1999, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#ifndef _BITS_SIGTHREAD_H -#define _BITS_SIGTHREAD_H 1 - -#if !defined _SIGNAL_H && !defined _PTHREAD_H -# error "Never include this file directly. Use <pthread.h> instead" -#endif - -/* Functions for handling signals. */ - -/* Modify the signal mask for the calling thread. The arguments have - the same meaning as for sigprocmask(2). */ -extern int pthread_sigmask (int __how, - __const sigset_t *__restrict __newmask, - sigset_t *__restrict __oldmask)__THROW; - -/* Send signal SIGNO to the given thread. */ -extern int pthread_kill (pthread_t __thread1, int __signo) __THROW; - -#endif /* bits/sigthread.h */ diff --git a/newlib/libc/sys/linux/linuxthreads/bp-sym.h b/newlib/libc/sys/linux/linuxthreads/bp-sym.h deleted file mode 100644 index 1aeb2364e..000000000 --- a/newlib/libc/sys/linux/linuxthreads/bp-sym.h +++ /dev/null @@ -1,26 +0,0 @@ -/* Bounded-pointer symbol modifier. - Copyright (C) 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Greg McGary <greg@mcgary.org> - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#define BP_SYM(name) _BP_SYM (name) -#if __BOUNDED_POINTERS__ -# define _BP_SYM(name) __BP_##name -#else -# define _BP_SYM(name) name -#endif diff --git a/newlib/libc/sys/linux/linuxthreads/cancel.c b/newlib/libc/sys/linux/linuxthreads/cancel.c deleted file mode 100644 index 0fd6cd094..000000000 --- a/newlib/libc/sys/linux/linuxthreads/cancel.c +++ /dev/null @@ -1,220 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Thread cancellation */ - -#include <errno.h> -#include <rpc/rpc.h> -#include "pthread.h" -#include "internals.h" -#include "spinlock.h" -#include "restart.h" - -#ifdef _STACK_GROWS_DOWN -# define FRAME_LEFT(frame, other) ((char *) frame >= (char *) other) -#elif _STACK_GROWS_UP -# define FRAME_LEFT(frame, other) ((char *) frame <= (char *) other) -#else -# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP" -#endif - - -int pthread_setcancelstate(int state, int * oldstate) -{ - pthread_descr self = thread_self(); - if (state < PTHREAD_CANCEL_ENABLE || state > PTHREAD_CANCEL_DISABLE) - return EINVAL; - if (oldstate != NULL) *oldstate = THREAD_GETMEM(self, p_cancelstate); - THREAD_SETMEM(self, p_cancelstate, state); - if (THREAD_GETMEM(self, p_canceled) && - THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE && - THREAD_GETMEM(self, p_canceltype) == PTHREAD_CANCEL_ASYNCHRONOUS) - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - return 0; -} - -int pthread_setcanceltype(int type, int * oldtype) -{ - pthread_descr self = thread_self(); - if (type < PTHREAD_CANCEL_DEFERRED || type > PTHREAD_CANCEL_ASYNCHRONOUS) - return EINVAL; - if (oldtype != NULL) *oldtype = THREAD_GETMEM(self, p_canceltype); - THREAD_SETMEM(self, p_canceltype, type); - if (THREAD_GETMEM(self, p_canceled) && - THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE && - THREAD_GETMEM(self, p_canceltype) == PTHREAD_CANCEL_ASYNCHRONOUS) - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - return 0; -} - -int pthread_cancel(pthread_t thread) -{ - pthread_handle handle = thread_handle(thread); - int pid; - int dorestart = 0; - pthread_descr th; - pthread_extricate_if *pextricate; - int already_canceled; - - __pthread_lock(&handle->h_lock, NULL); - if (invalid_handle(handle, thread)) { - __pthread_unlock(&handle->h_lock); - return ESRCH; - } - - th = handle->h_descr; - - already_canceled = th->p_canceled; - th->p_canceled = 1; - - if (th->p_cancelstate == PTHREAD_CANCEL_DISABLE || already_canceled) { - __pthread_unlock(&handle->h_lock); - return 0; - } - - pextricate = th->p_extricate; - pid = th->p_pid; - - /* If the thread has registered an extrication interface, then - invoke the interface. If it returns 1, then we succeeded in - dequeuing the thread from whatever waiting object it was enqueued - with. In that case, it is our responsibility to wake it up. - And also to set the p_woken_by_cancel flag so the woken thread - can tell that it was woken by cancellation. */ - - if (pextricate != NULL) { - dorestart = pextricate->pu_extricate_func(pextricate->pu_object, th); - th->p_woken_by_cancel = dorestart; - } - - __pthread_unlock(&handle->h_lock); - - /* If the thread has suspended or is about to, then we unblock it by - issuing a restart, instead of a cancel signal. Otherwise we send - the cancel signal to unblock the thread from a cancellation point, - or to initiate asynchronous cancellation. The restart is needed so - we have proper accounting of restarts; suspend decrements the thread's - resume count, and restart() increments it. This also means that suspend's - handling of the cancel signal is obsolete. */ - - if (dorestart) - restart(th); - else - kill(pid, __pthread_sig_cancel); - - return 0; -} - -void pthread_testcancel(void) -{ - pthread_descr self = thread_self(); - if (THREAD_GETMEM(self, p_canceled) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE) - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); -} - -void _pthread_cleanup_push(struct _pthread_cleanup_buffer * buffer, - void (*routine)(void *), void * arg) -{ - pthread_descr self = thread_self(); - buffer->__routine = routine; - buffer->__arg = arg; - buffer->__prev = THREAD_GETMEM(self, p_cleanup); - if (buffer->__prev != NULL && FRAME_LEFT (buffer, buffer->__prev)) - buffer->__prev = NULL; - THREAD_SETMEM(self, p_cleanup, buffer); -} - -void _pthread_cleanup_pop(struct _pthread_cleanup_buffer * buffer, - int execute) -{ - pthread_descr self = thread_self(); - if (execute) buffer->__routine(buffer->__arg); - THREAD_SETMEM(self, p_cleanup, buffer->__prev); -} - -void _pthread_cleanup_push_defer(struct _pthread_cleanup_buffer * buffer, - void (*routine)(void *), void * arg) -{ - pthread_descr self = thread_self(); - buffer->__routine = routine; - buffer->__arg = arg; - buffer->__canceltype = THREAD_GETMEM(self, p_canceltype); - buffer->__prev = THREAD_GETMEM(self, p_cleanup); - if (buffer->__prev != NULL && FRAME_LEFT (buffer, buffer->__prev)) - buffer->__prev = NULL; - THREAD_SETMEM(self, p_canceltype, PTHREAD_CANCEL_DEFERRED); - THREAD_SETMEM(self, p_cleanup, buffer); -} - -void _pthread_cleanup_pop_restore(struct _pthread_cleanup_buffer * buffer, - int execute) -{ - pthread_descr self = thread_self(); - if (execute) buffer->__routine(buffer->__arg); - THREAD_SETMEM(self, p_cleanup, buffer->__prev); - THREAD_SETMEM(self, p_canceltype, buffer->__canceltype); - if (THREAD_GETMEM(self, p_canceled) && - THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE && - THREAD_GETMEM(self, p_canceltype) == PTHREAD_CANCEL_ASYNCHRONOUS) - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); -} - -void __pthread_perform_cleanup(char *currentframe) -{ - pthread_descr self = thread_self(); - struct _pthread_cleanup_buffer *c = THREAD_GETMEM(self, p_cleanup); - struct _pthread_cleanup_buffer *last; - - if (c != NULL) - while (FRAME_LEFT (currentframe, c)) - { - last = c; - c = c->__prev; - - if (c == NULL || FRAME_LEFT (last, c)) - { - c = NULL; - break; - } - } - - while (c != NULL) - { - c->__routine(c->__arg); - - last = c; - c = c->__prev; - - if (FRAME_LEFT (last, c)) - break; - } - -#if 0 - /* And the TSD which needs special help. */ - if (THREAD_GETMEM(self, p_libc_specific[_LIBC_TSD_KEY_RPC_VARS]) != NULL) - __rpc_thread_destroy (); -#endif -} - -#ifndef SHARED -/* We need a hook to force the cancelation wrappers and file locking - to be linked in when static libpthread is used. */ -extern const int __pthread_provide_wrappers; -static const int *const __pthread_require_wrappers = - &__pthread_provide_wrappers; -extern const int __pthread_provide_lockfile; -static const int *const __pthread_require_lockfile = - &__pthread_provide_lockfile; -#endif diff --git a/newlib/libc/sys/linux/linuxthreads/condvar.c b/newlib/libc/sys/linux/linuxthreads/condvar.c deleted file mode 100644 index a06211f58..000000000 --- a/newlib/libc/sys/linux/linuxthreads/condvar.c +++ /dev/null @@ -1,301 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* and Pavel Krauz (krauz@fsid.cvut.cz). */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Condition variables */ - -#include <errno.h> -#include <sched.h> -#include <stddef.h> -#include <sys/time.h> -#include "pthread.h" -#include "internals.h" -#include "spinlock.h" -#include "queue.h" -#include "restart.h" - -int pthread_cond_init(pthread_cond_t *cond, - const pthread_condattr_t *cond_attr) -{ - __pthread_init_lock(&cond->__c_lock); - cond->__c_waiting = NULL; - return 0; -} - -int pthread_cond_destroy(pthread_cond_t *cond) -{ - if (cond->__c_waiting != NULL) return EBUSY; - return 0; -} - -/* Function called by pthread_cancel to remove the thread from - waiting on a condition variable queue. */ - -static int cond_extricate_func(void *obj, pthread_descr th) -{ - volatile pthread_descr self = thread_self(); - pthread_cond_t *cond = obj; - int did_remove = 0; - - __pthread_lock(&cond->__c_lock, self); - did_remove = remove_from_queue(&cond->__c_waiting, th); - __pthread_unlock(&cond->__c_lock); - - return did_remove; -} - -int pthread_cond_wait(pthread_cond_t *cond, pthread_mutex_t *mutex) -{ - volatile pthread_descr self = thread_self(); - pthread_extricate_if extr; - int already_canceled = 0; - int spurious_wakeup_count; - - /* Check whether the mutex is locked and owned by this thread. */ - if (mutex->__m_kind != PTHREAD_MUTEX_TIMED_NP - && mutex->__m_kind != PTHREAD_MUTEX_ADAPTIVE_NP - && mutex->__m_owner != self) - return EINVAL; - - /* Set up extrication interface */ - extr.pu_object = cond; - extr.pu_extricate_func = cond_extricate_func; - - /* Register extrication interface */ - THREAD_SETMEM(self, p_condvar_avail, 0); - __pthread_set_own_extricate_if(self, &extr); - - /* Atomically enqueue thread for waiting, but only if it is not - canceled. If the thread is canceled, then it will fall through the - suspend call below, and then call pthread_exit without - having to worry about whether it is still on the condition variable queue. - This depends on pthread_cancel setting p_canceled before calling the - extricate function. */ - - __pthread_lock(&cond->__c_lock, self); - if (!(THREAD_GETMEM(self, p_canceled) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE)) - enqueue(&cond->__c_waiting, self); - else - already_canceled = 1; - __pthread_unlock(&cond->__c_lock); - - if (already_canceled) { - __pthread_set_own_extricate_if(self, 0); - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - } - - pthread_mutex_unlock(mutex); - - spurious_wakeup_count = 0; - while (1) - { - suspend(self); - if (THREAD_GETMEM(self, p_condvar_avail) == 0 - && (THREAD_GETMEM(self, p_woken_by_cancel) == 0 - || THREAD_GETMEM(self, p_cancelstate) != PTHREAD_CANCEL_ENABLE)) - { - /* Count resumes that don't belong to us. */ - spurious_wakeup_count++; - continue; - } - break; - } - - __pthread_set_own_extricate_if(self, 0); - - /* Check for cancellation again, to provide correct cancellation - point behavior */ - - if (THREAD_GETMEM(self, p_woken_by_cancel) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE) { - THREAD_SETMEM(self, p_woken_by_cancel, 0); - pthread_mutex_lock(mutex); - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - } - - /* Put back any resumes we caught that don't belong to us. */ - while (spurious_wakeup_count--) - restart(self); - - pthread_mutex_lock(mutex); - return 0; -} - -static int -pthread_cond_timedwait_relative(pthread_cond_t *cond, - pthread_mutex_t *mutex, - const struct timespec * abstime) -{ - volatile pthread_descr self = thread_self(); - int already_canceled = 0; - pthread_extricate_if extr; - int spurious_wakeup_count; - - /* Check whether the mutex is locked and owned by this thread. */ - if (mutex->__m_kind != PTHREAD_MUTEX_TIMED_NP - && mutex->__m_kind != PTHREAD_MUTEX_ADAPTIVE_NP - && mutex->__m_owner != self) - return EINVAL; - - /* Set up extrication interface */ - extr.pu_object = cond; - extr.pu_extricate_func = cond_extricate_func; - - /* Register extrication interface */ - THREAD_SETMEM(self, p_condvar_avail, 0); - __pthread_set_own_extricate_if(self, &extr); - - /* Enqueue to wait on the condition and check for cancellation. */ - __pthread_lock(&cond->__c_lock, self); - if (!(THREAD_GETMEM(self, p_canceled) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE)) - enqueue(&cond->__c_waiting, self); - else - already_canceled = 1; - __pthread_unlock(&cond->__c_lock); - - if (already_canceled) { - __pthread_set_own_extricate_if(self, 0); - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - } - - pthread_mutex_unlock(mutex); - - spurious_wakeup_count = 0; - while (1) - { - if (!timedsuspend(self, abstime)) { - int was_on_queue; - - /* __pthread_lock will queue back any spurious restarts that - may happen to it. */ - - __pthread_lock(&cond->__c_lock, self); - was_on_queue = remove_from_queue(&cond->__c_waiting, self); - __pthread_unlock(&cond->__c_lock); - - if (was_on_queue) { - __pthread_set_own_extricate_if(self, 0); - pthread_mutex_lock(mutex); - return ETIMEDOUT; - } - - /* Eat the outstanding restart() from the signaller */ - suspend(self); - } - - if (THREAD_GETMEM(self, p_condvar_avail) == 0 - && (THREAD_GETMEM(self, p_woken_by_cancel) == 0 - || THREAD_GETMEM(self, p_cancelstate) != PTHREAD_CANCEL_ENABLE)) - { - /* Count resumes that don't belong to us. */ - spurious_wakeup_count++; - continue; - } - break; - } - - __pthread_set_own_extricate_if(self, 0); - - /* The remaining logic is the same as in other cancellable waits, - such as pthread_join sem_wait or pthread_cond wait. */ - - if (THREAD_GETMEM(self, p_woken_by_cancel) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE) { - THREAD_SETMEM(self, p_woken_by_cancel, 0); - pthread_mutex_lock(mutex); - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - } - - /* Put back any resumes we caught that don't belong to us. */ - while (spurious_wakeup_count--) - restart(self); - - pthread_mutex_lock(mutex); - return 0; -} - -int pthread_cond_timedwait(pthread_cond_t *cond, pthread_mutex_t *mutex, - const struct timespec * abstime) -{ - /* Indirect call through pointer! */ - return pthread_cond_timedwait_relative(cond, mutex, abstime); -} - -int pthread_cond_signal(pthread_cond_t *cond) -{ - pthread_descr th; - - __pthread_lock(&cond->__c_lock, NULL); - th = dequeue(&cond->__c_waiting); - __pthread_unlock(&cond->__c_lock); - if (th != NULL) { - th->p_condvar_avail = 1; - WRITE_MEMORY_BARRIER(); - restart(th); - } - return 0; -} - -int pthread_cond_broadcast(pthread_cond_t *cond) -{ - pthread_descr tosignal, th; - - __pthread_lock(&cond->__c_lock, NULL); - /* Copy the current state of the waiting queue and empty it */ - tosignal = cond->__c_waiting; - cond->__c_waiting = NULL; - __pthread_unlock(&cond->__c_lock); - /* Now signal each process in the queue */ - while ((th = dequeue(&tosignal)) != NULL) { - th->p_condvar_avail = 1; - WRITE_MEMORY_BARRIER(); - restart(th); - } - return 0; -} - -int pthread_condattr_init(pthread_condattr_t *attr) -{ - return 0; -} - -int pthread_condattr_destroy(pthread_condattr_t *attr) -{ - return 0; -} - -#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 3 - -int pthread_condattr_getpshared (const pthread_condattr_t *attr, int *pshared) -{ - *pshared = PTHREAD_PROCESS_PRIVATE; - return 0; -} - -int pthread_condattr_setpshared (pthread_condattr_t *attr, int pshared) -{ - if (pshared != PTHREAD_PROCESS_PRIVATE && pshared != PTHREAD_PROCESS_SHARED) - return EINVAL; - - /* For now it is not possible to shared a conditional variable. */ - if (pshared != PTHREAD_PROCESS_PRIVATE) - return ENOSYS; - - return 0; -} - -#endif /* !_ELIX_LEVEL || _ELIX_LEVEL >= 3 */ - diff --git a/newlib/libc/sys/linux/linuxthreads/config.h b/newlib/libc/sys/linux/linuxthreads/config.h deleted file mode 100644 index 99b0528a6..000000000 --- a/newlib/libc/sys/linux/linuxthreads/config.h +++ /dev/null @@ -1,14 +0,0 @@ -#define HAVE_WEAK_SYMBOLS 1 -#define HAVE_GNU_LD 1 -#define HAVE_ELF 1 -#define __ASSUME_REALTIME_SIGNALS 1 -#define ASM_GLOBAL_DIRECTIVE .global - -#define TEMP_FAILURE_RETRY(expression) \ - (__extension__ \ - ({ long int __result; \ - do __result = (long int) (expression); \ - while (__result == -1L && errno == EINTR); \ - __result; })) - -#define UINT32_C(c) c ## U diff --git a/newlib/libc/sys/linux/linuxthreads/configure b/newlib/libc/sys/linux/linuxthreads/configure deleted file mode 100755 index ded146b65..000000000 --- a/newlib/libc/sys/linux/linuxthreads/configure +++ /dev/null @@ -1,3453 +0,0 @@ -#! /bin/sh - -# Guess values for system-dependent variables and create Makefiles. -# Generated automatically using autoconf version 2.13 -# Copyright (C) 1992, 93, 94, 95, 96 Free Software Foundation, Inc. -# -# This configure script is free software; the Free Software Foundation -# gives unlimited permission to copy, distribute and modify it. - -# Defaults: -ac_help= -ac_default_prefix=/usr/local -# Any additions from configure.in: -ac_help="$ac_help - --enable-multilib build many library versions (default)" -ac_help="$ac_help - --enable-target-optspace optimize for space" -ac_help="$ac_help - --enable-malloc-debugging indicate malloc debugging requested" -ac_help="$ac_help - --enable-newlib-multithread enable support for multiple threads" -ac_help="$ac_help - --enable-newlib-iconv enable iconv library support" -ac_help="$ac_help - --enable-newlib-elix-level supply desired elix library level (1-4)" -ac_help="$ac_help - --disable-newlib-io-float disable printf/scanf family float support" -ac_help="$ac_help - --disable-newlib-supplied-syscalls disable newlib from supplying syscalls" -ac_help="$ac_help - --enable-maintainer-mode enable make rules and dependencies not useful - (and sometimes confusing) to the casual installer" -ac_help="$ac_help - --enable-shared[=PKGS] build shared libraries [default=yes]" -ac_help="$ac_help - --enable-static[=PKGS] build static libraries [default=yes]" -ac_help="$ac_help - --enable-fast-install[=PKGS] optimize for fast installation [default=yes]" -ac_help="$ac_help - --with-gnu-ld assume the C compiler uses GNU ld [default=no]" -ac_help="$ac_help - --disable-libtool-lock avoid locking (might break parallel builds)" -ac_help="$ac_help - --with-pic try to use only PIC/non-PIC objects [default=use both]" - -# Initialize some variables set by options. -# The variables have the same names as the options, with -# dashes changed to underlines. -build=NONE -cache_file=./config.cache -exec_prefix=NONE -host=NONE -no_create= -nonopt=NONE -no_recursion= -prefix=NONE -program_prefix=NONE -program_suffix=NONE -program_transform_name=s,x,x, -silent= -site= -srcdir= -target=NONE -verbose= -x_includes=NONE -x_libraries=NONE -bindir='${exec_prefix}/bin' -sbindir='${exec_prefix}/sbin' -libexecdir='${exec_prefix}/libexec' -datadir='${prefix}/share' -sysconfdir='${prefix}/etc' -sharedstatedir='${prefix}/com' -localstatedir='${prefix}/var' -libdir='${exec_prefix}/lib' -includedir='${prefix}/include' -oldincludedir='/usr/include' -infodir='${prefix}/info' -mandir='${prefix}/man' - -# Initialize some other variables. -subdirs= -MFLAGS= MAKEFLAGS= -SHELL=${CONFIG_SHELL-/bin/sh} -# Maximum number of lines to put in a shell here document. -ac_max_here_lines=12 - -ac_prev= -for ac_option -do - - # If the previous option needs an argument, assign it. - if test -n "$ac_prev"; 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exit 1; } - fi - fi - - cd $ac_popdir - done -fi - diff --git a/newlib/libc/sys/linux/linuxthreads/configure.in b/newlib/libc/sys/linux/linuxthreads/configure.in deleted file mode 100644 index 113743a87..000000000 --- a/newlib/libc/sys/linux/linuxthreads/configure.in +++ /dev/null @@ -1,31 +0,0 @@ -dnl This is the newlib/libc/sys/linux/linuxthreads configure.in file. -dnl Process this file with autoconf to produce a configure script. - -AC_PREREQ(2.5) -AC_INIT(attr.c) - -dnl Can't be done in NEWLIB_CONFIGURE because that confuses automake. -AC_CONFIG_AUX_DIR(../../../../..) - -NEWLIB_CONFIGURE(../../../..) - -dnl We have to enable libtool after NEWLIB_CONFIGURE because if we try and -dnl add it into NEWLIB_CONFIGURE, executable tests are made before the first -dnl line of the macro which fail because appropriate LDFLAGS are not set. - -if test "${use_libtool}" = "yes"; then -AC_LIBTOOL_WIN32_DLL -AM_PROG_LIBTOOL -AC_PROG_AWK -fi - -if test -n "${machine_dir}"; then - MACHINE_OBJLIST=machine/${machine_dir}/objectlist.awk.in - MACHINE_LIB=machine/${machine_dir}/lib.a -fi -AC_SUBST(MACHINE_OBJLIST) -AC_SUBST(MACHINE_LIB) - -AC_CONFIG_SUBDIRS(machine) - -AC_OUTPUT(Makefile) diff --git a/newlib/libc/sys/linux/linuxthreads/defs.awk b/newlib/libc/sys/linux/linuxthreads/defs.awk deleted file mode 100644 index 7ca5a3364..000000000 --- a/newlib/libc/sys/linux/linuxthreads/defs.awk +++ /dev/null @@ -1,27 +0,0 @@ -/^[ ]*\.endp/ { need_endp = 1 } -/^[ ]*\.end/ { need_end = 1 } -/^[ ]*\.align/ { if($2 > max) max = $2; } - -END { - if(need_endp) - { - print "#define END_INIT .endp _init"; - print "#define END_FINI .endp _fini"; - } else if(need_end) - { - print "#define END_INIT .end _init"; - print "#define END_FINI .end _fini"; - } - else - { - print "#define END_INIT"; - print "#define END_FINI"; - } - if(max) - print "#define ALIGN .align", max; - else - print "#define ALIGN"; - - print "#include <libc-symbols.h>"; - print "weak_extern (__gmon_start__)"; -} diff --git a/newlib/libc/sys/linux/linuxthreads/ecmutex.c b/newlib/libc/sys/linux/linuxthreads/ecmutex.c deleted file mode 100644 index ce54ddf33..000000000 --- a/newlib/libc/sys/linux/linuxthreads/ecmutex.c +++ /dev/null @@ -1,157 +0,0 @@ -/* Test of the error checking mutex and incidently also barriers. */ - -#include <errno.h> -#include <pthread.h> -#include <stdio.h> -#include <stdlib.h> - - -static pthread_mutex_t locks[] = -{ - PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP, - PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP, - PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP, - PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP, - PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP -}; -#define nlocks ((int) (sizeof (locks) / sizeof (locks[0]))) - -static pthread_barrier_t barrier; -#define SYNC pthread_barrier_wait (&barrier) - -#define NTHREADS nlocks - -#define ROUNDS 20 - - -static void * -worker (void *arg) -{ - /* We are locking the and unlocked the locks and check the errors. - Since we are using the error-checking variant the implementation - should report them. */ - int nr = (long int) arg; - int i; - void *result = NULL; - int retval; - - for (i = 0; i < ROUNDS; ++i) - { - /* Skip the rounds which would make other == own. */ - if (i % nlocks == 0) - continue; - - /* Get the "own" mutex. */ - if (pthread_mutex_trylock (&locks[nr]) != 0) - { - printf ("thread %d failed getting own mutex\n", nr); - result = (void *) 1; - } - - /* Try locking "own" mutex again. */ - retval = pthread_mutex_lock (&locks[nr]); - if (retval != EDEADLK) - { - printf ("thread %d failed getting own mutex\n", nr); - result = (void *) 1; - } - - /* Try to get a different semaphore. */ - SYNC; - retval = pthread_mutex_trylock (&locks[(nr + i) % nlocks]); - if (retval != EBUSY) - { - printf ("thread %d didn't deadlock on getting %d's lock\n", - nr, (nr + i) % nlocks); - result = (void *) 1; - } - - /* Try unlocking other's lock. */ - retval = pthread_mutex_unlock (&locks[(nr + i) % nlocks]); - if (retval != EPERM) - { - printf ("thread %d managed releasing mutex %d\n", - nr, (nr + i) % nlocks); - result = (void *) 1; - } - - /* All lock one mutex now. */ - SYNC; - retval = pthread_mutex_lock (&locks[i % nlocks]); - if (nr == (i % nlocks)) - { - if (retval != EDEADLK) - { - printf ("thread %d didn't deadlock on getting %d's lock\n", - nr, (nr + i) % nlocks); - result = (void *) 1; - } - if (pthread_mutex_unlock (&locks[i % nlocks]) != 0) - { - printf ("thread %d failed releasing own mutex\n", nr); - result = (void *) 1; - } - } - else - { - if (retval != 0) - { - printf ("thread %d failed acquiring mutex %d\n", - nr, i % nlocks); - result = (void *) 1; - } - else if (pthread_mutex_unlock (&locks[i % nlocks]) != 0) - { - printf ("thread %d failed releasing mutex %d\n", - nr, i % nlocks); - result = (void *) 1; - } - } - - /* Unlock the own lock. */ - SYNC; - if (nr != (i % nlocks) && pthread_mutex_unlock (&locks[nr]) != 0) - { - printf ("thread %d failed releasing own mutex\n", nr); - result = (void *) 1; - } - - /* Try unlocking again. */ - retval = pthread_mutex_unlock (&locks[nr]); - if (retval == 0) - { - printf ("thread %d managed releasing own mutex twice\n", nr); - result = (void *) 1; - } - } - - return result; -} - - -#define TEST_FUNCTION do_test () -static int -do_test (void) -{ - pthread_t threads[NTHREADS]; - int i; - void *res; - int result = 0; - - pthread_barrier_init (&barrier, NULL, NTHREADS); - - for (i = 0; i < NTHREADS; ++i) - if (pthread_create (&threads[i], NULL, worker, (void *) (long int) i) != 0) - { - printf ("failed to create thread %d: %m\n", i); - exit (1); - } - - for (i = 0; i < NTHREADS; ++i) - if (pthread_join (threads[i], &res) != 0 || res != NULL) - result = 1; - - return result; -} - -#include "../test-skeleton.c" diff --git a/newlib/libc/sys/linux/linuxthreads/events.c b/newlib/libc/sys/linux/linuxthreads/events.c deleted file mode 100644 index c65bafc76..000000000 --- a/newlib/libc/sys/linux/linuxthreads/events.c +++ /dev/null @@ -1,37 +0,0 @@ -/* Event functions used while debugging. - Copyright (C) 1999, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -/* The functions contained here do nothing, they just return. */ - -#include "internals.h" - -void -__linuxthreads_create_event (void) -{ -} - -void -__linuxthreads_death_event (void) -{ -} - -void -__linuxthreads_reap_event (void) -{ -} diff --git a/newlib/libc/sys/linux/linuxthreads/getcpuclockid.c b/newlib/libc/sys/linux/linuxthreads/getcpuclockid.c deleted file mode 100644 index 76d39a5de..000000000 --- a/newlib/libc/sys/linux/linuxthreads/getcpuclockid.c +++ /dev/null @@ -1,40 +0,0 @@ -/* Copyright (C) 2000, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <errno.h> -#include <pthread.h> -#include <sys/time.h> -#include <internals.h> - -int -pthread_getcpuclockid (pthread_t thread_id, clockid_t *clock_id) -{ - /* We don't allow any process ID but our own. */ - if (thread_handle (thread_id)->h_descr != thread_self ()) - return EPERM; - -#ifdef CLOCK_THREAD_CPUTIME_ID - /* Store the number. */ - *clock_id = CLOCK_THREAD_CPUTIME_ID; - - return 0; -#else - /* We don't have a timer for that. */ - return ENOENT; -#endif -} diff --git a/newlib/libc/sys/linux/linuxthreads/getreent.c b/newlib/libc/sys/linux/linuxthreads/getreent.c deleted file mode 100644 index e73c4a531..000000000 --- a/newlib/libc/sys/linux/linuxthreads/getreent.c +++ /dev/null @@ -1,11 +0,0 @@ -/* get thread-specific reentrant pointer */ - -#include <internals.h> - -struct _reent * -__getreent (void) -{ - pthread_descr self = thread_self(); - return THREAD_GETMEM(self, p_reentp); -} - diff --git a/newlib/libc/sys/linux/linuxthreads/internals.h b/newlib/libc/sys/linux/linuxthreads/internals.h deleted file mode 100644 index 6da0deb43..000000000 --- a/newlib/libc/sys/linux/linuxthreads/internals.h +++ /dev/null @@ -1,576 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -#ifndef _INTERNALS_H -#define _INTERNALS_H 1 - -/* Internal data structures */ - -/* Includes */ - -#include <limits.h> -#include <resolv.h> -#include <setjmp.h> -#include <signal.h> -#include <unistd.h> -#include <stackinfo.h> -#include <sys/types.h> -#include <reent.h> -#include <bits/libc-tsd.h> /* for _LIBC_TSD_KEY_N */ - -extern long int testandset (int *spinlock); -extern int __compare_and_swap (long int *p, long int oldval, long int newval); - -#include "libc-symbols.h" -#include "pt-machine.h" -#include "semaphore.h" -#include "thread_dbP.h" -#include <hp-timing.h> - -#ifndef THREAD_GETMEM -# define THREAD_GETMEM(descr, member) descr->member -#endif -#ifndef THREAD_GETMEM_NC -# define THREAD_GETMEM_NC(descr, member) descr->member -#endif -#ifndef THREAD_SETMEM -# define THREAD_SETMEM(descr, member, value) descr->member = (value) -#endif -#ifndef THREAD_SETMEM_NC -# define THREAD_SETMEM_NC(descr, member, value) descr->member = (value) -#endif - -/* Arguments passed to thread creation routine */ - -struct pthread_start_args { - void * (*start_routine)(void *); /* function to run */ - void * arg; /* its argument */ - sigset_t mask; /* initial signal mask for thread */ - int schedpolicy; /* initial scheduling policy (if any) */ - struct __sched_param schedparam; /* initial scheduling parameters (if any) */ -}; - - -/* We keep thread specific data in a special data structure, a two-level - array. The top-level array contains pointers to dynamically allocated - arrays of a certain number of data pointers. So we can implement a - sparse array. Each dynamic second-level array has - PTHREAD_KEY_2NDLEVEL_SIZE - entries. This value shouldn't be too large. */ -#define PTHREAD_KEY_2NDLEVEL_SIZE 32 - -/* We need to address PTHREAD_KEYS_MAX key with PTHREAD_KEY_2NDLEVEL_SIZE - keys in each subarray. */ -#define PTHREAD_KEY_1STLEVEL_SIZE \ - ((PTHREAD_KEYS_MAX + PTHREAD_KEY_2NDLEVEL_SIZE - 1) \ - / PTHREAD_KEY_2NDLEVEL_SIZE) - -typedef void (*destr_function)(void *); - -struct pthread_key_struct { - int in_use; /* already allocated? */ - destr_function destr; /* destruction routine */ -}; - - -#define PTHREAD_START_ARGS_INITIALIZER(fct) \ - { (void *(*) (void *)) fct, NULL, {{0, }}, 0, { 0 } } - -/* The type of thread descriptors */ - -typedef struct _pthread_descr_struct * pthread_descr; - -/* Callback interface for removing the thread from waiting on an - object if it is cancelled while waiting or about to wait. - This hold a pointer to the object, and a pointer to a function - which ``extricates'' the thread from its enqueued state. - The function takes two arguments: pointer to the wait object, - and a pointer to the thread. It returns 1 if an extrication - actually occured, and hence the thread must also be signalled. - It returns 0 if the thread had already been extricated. */ - -typedef struct _pthread_extricate_struct { - void *pu_object; - int (*pu_extricate_func)(void *, pthread_descr); -} pthread_extricate_if; - -/* Atomic counter made possible by compare_and_swap */ - -struct pthread_atomic { - long p_count; - int p_spinlock; -}; - -/* Context info for read write locks. The pthread_rwlock_info structure - is information about a lock that has been read-locked by the thread - in whose list this structure appears. The pthread_rwlock_context - is embedded in the thread context and contains a pointer to the - head of the list of lock info structures, as well as a count of - read locks that are untracked, because no info structure could be - allocated for them. */ - -struct _pthread_rwlock_t; - -typedef struct _pthread_rwlock_info { - struct _pthread_rwlock_info *pr_next; - struct _pthread_rwlock_t *pr_lock; - int pr_lock_count; -} pthread_readlock_info; - -struct _pthread_descr_struct { - union { - struct { - pthread_descr self; /* Pointer to this structure */ - } data; - void *__padding[16]; - } p_header; - pthread_descr p_nextlive, p_prevlive; - /* Double chaining of active threads */ - pthread_descr p_nextwaiting; /* Next element in the queue holding the thr */ - pthread_descr p_nextlock; /* can be on a queue and waiting on a lock */ - pthread_t p_tid; /* Thread identifier */ - int p_pid; /* PID of Unix process */ - int p_priority; /* Thread priority (== 0 if not realtime) */ - struct _pthread_fastlock * p_lock; /* Spinlock for synchronized accesses */ - int p_signal; /* last signal received */ - sigjmp_buf * p_signal_jmp; /* where to siglongjmp on a signal or NULL */ - sigjmp_buf * p_cancel_jmp; /* where to siglongjmp on a cancel or NULL */ - char p_terminated; /* true if terminated e.g. by pthread_exit */ - char p_detached; /* true if detached */ - char p_exited; /* true if the assoc. process terminated */ - void * p_retval; /* placeholder for return value */ - int p_retcode; /* placeholder for return code */ - pthread_descr p_joining; /* thread joining on that thread or NULL */ - struct _pthread_cleanup_buffer * p_cleanup; /* cleanup functions */ - char p_cancelstate; /* cancellation state */ - char p_canceltype; /* cancellation type (deferred/async) */ - char p_canceled; /* cancellation request pending */ - struct _reent * p_reentp; /* pointer to reent struct */ - struct _reent p_reent; /* reentrant structure for newlib */ - int * p_h_errnop; /* pointer to used h_errno variable */ - int p_h_errno; /* error returned by last netdb function */ - char * p_in_sighandler; /* stack address of sighandler, or NULL */ - char p_sigwaiting; /* true if a sigwait() is in progress */ - struct pthread_start_args p_start_args; /* arguments for thread creation */ - void ** p_specific[PTHREAD_KEY_1STLEVEL_SIZE]; /* thread-specific data */ - void * p_libc_specific[_LIBC_TSD_KEY_N]; /* thread-specific data for libc */ - int p_userstack; /* nonzero if the user provided the stack */ - void *p_guardaddr; /* address of guard area or NULL */ - size_t p_guardsize; /* size of guard area */ - int p_nr; /* Index of descriptor in __pthread_handles */ - int p_report_events; /* Nonzero if events must be reported. */ - td_eventbuf_t p_eventbuf; /* Data for event. */ - struct pthread_atomic p_resume_count; /* number of times restart() was - called on thread */ - char p_woken_by_cancel; /* cancellation performed wakeup */ - char p_condvar_avail; /* flag if conditional variable became avail */ - char p_sem_avail; /* flag if semaphore became available */ - pthread_extricate_if *p_extricate; /* See above */ - pthread_readlock_info *p_readlock_list; /* List of readlock info structs */ - pthread_readlock_info *p_readlock_free; /* Free list of structs */ - int p_untracked_readlock_count; /* Readlocks not tracked by list */ - struct __res_state *p_resp; /* Pointer to resolver state */ - struct __res_state p_res; /* per-thread resolver state */ - int p_inheritsched; /* copied from the thread attribute */ -#if HP_TIMING_AVAIL - hp_timing_t p_cpuclock_offset; /* Initial CPU clock for thread. */ -#endif - /* New elements must be added at the end. */ -} __attribute__ ((aligned(32))); /* We need to align the structure so that - doubles are aligned properly. This is 8 - bytes on MIPS and 16 bytes on MIPS64. - 32 bytes might give better cache - utilization. */ - - -/* The type of thread handles. */ - -typedef struct pthread_handle_struct * pthread_handle; - -struct pthread_handle_struct { - struct _pthread_fastlock h_lock; /* Fast lock for sychronized access */ - pthread_descr h_descr; /* Thread descriptor or NULL if invalid */ - char * h_bottom; /* Lowest address in the stack thread */ -}; - -/* The type of messages sent to the thread manager thread */ - -struct pthread_request { - pthread_descr req_thread; /* Thread doing the request */ - enum { /* Request kind */ - REQ_CREATE, REQ_FREE, REQ_PROCESS_EXIT, REQ_MAIN_THREAD_EXIT, - REQ_POST, REQ_DEBUG, REQ_KICK, REQ_FOR_EACH_THREAD - } req_kind; - union { /* Arguments for request */ - struct { /* For REQ_CREATE: */ - const pthread_attr_t * attr; /* thread attributes */ - void * (*fn)(void *); /* start function */ - void * arg; /* argument to start function */ - sigset_t mask; /* signal mask */ - } create; - struct { /* For REQ_FREE: */ - pthread_t thread_id; /* identifier of thread to free */ - } free; - struct { /* For REQ_PROCESS_EXIT: */ - int code; /* exit status */ - } exit; - void * post; /* For REQ_POST: the semaphore */ - struct { /* For REQ_FOR_EACH_THREAD: callback */ - void (*fn)(void *, pthread_descr); - void *arg; - } for_each; - } req_args; -}; - - -/* Signals used for suspend/restart and for cancellation notification. */ - -extern int __pthread_sig_restart; -extern int __pthread_sig_cancel; - -/* Signal used for interfacing with gdb */ - -extern int __pthread_sig_debug; - -/* Global array of thread handles, used for validating a thread id - and retrieving the corresponding thread descriptor. Also used for - mapping the available stack segments. */ - -extern struct pthread_handle_struct __pthread_handles[PTHREAD_THREADS_MAX]; - -/* Descriptor of the initial thread */ - -extern struct _pthread_descr_struct __pthread_initial_thread; - -/* Descriptor of the manager thread */ - -extern struct _pthread_descr_struct __pthread_manager_thread; - -/* Descriptor of the main thread */ - -extern pthread_descr __pthread_main_thread; - -/* Limit between the stack of the initial thread (above) and the - stacks of other threads (below). Aligned on a STACK_SIZE boundary. - Initially 0, meaning that the current thread is (by definition) - the initial thread. */ - -extern char *__pthread_initial_thread_bos; - -/* Indicate whether at least one thread has a user-defined stack (if 1), - or all threads have stacks supplied by LinuxThreads (if 0). */ - -extern int __pthread_nonstandard_stacks; - -/* File descriptor for sending requests to the thread manager. - Initially -1, meaning that __pthread_initialize_manager must be called. */ - -extern int __pthread_manager_request; - -/* Other end of the pipe for sending requests to the thread manager. */ - -extern int __pthread_manager_reader; - -/* Limits of the thread manager stack. */ - -extern char *__pthread_manager_thread_bos; -extern char *__pthread_manager_thread_tos; - -#ifdef FLOATING_STACKS -/* Maximum stack size. */ -extern size_t __pthread_max_stacksize; -#endif - -/* Pending request for a process-wide exit */ - -extern int __pthread_exit_requested, __pthread_exit_code; - -/* Set to 1 by gdb if we're debugging */ - -extern volatile int __pthread_threads_debug; - -/* Globally enabled events. */ -extern volatile td_thr_events_t __pthread_threads_events; - -/* Pointer to descriptor of thread with last event. */ -extern volatile pthread_descr __pthread_last_event; - -/* Flag which tells whether we are executing on SMP kernel. */ -extern int __pthread_smp_kernel; - -/* Return the handle corresponding to a thread id */ - -static inline pthread_handle thread_handle(pthread_t id) -{ - return &__pthread_handles[id % PTHREAD_THREADS_MAX]; -} - -/* Validate a thread handle. Must have acquired h->h_spinlock before. */ - -static inline int invalid_handle(pthread_handle h, pthread_t id) -{ - return h->h_descr == NULL || h->h_descr->p_tid != id || h->h_descr->p_terminated; -} - -static inline int nonexisting_handle(pthread_handle h, pthread_t id) -{ - return h->h_descr == NULL || h->h_descr->p_tid != id; -} - -/* Fill in defaults left unspecified by pt-machine.h. */ - -/* We round up a value with page size. */ -#ifndef page_roundup -#define page_roundup(v,p) ((((size_t) (v)) + (p) - 1) & ~((p) - 1)) -#endif - -/* The page size we can get from the system. This should likely not be - changed by the machine file but, you never know. */ -#ifndef PAGE_SIZE -#define PAGE_SIZE (sysconf (_SC_PAGE_SIZE)) -#endif - -/* The max size of the thread stack segments. If the default - THREAD_SELF implementation is used, this must be a power of two and - a multiple of PAGE_SIZE. */ -#ifndef STACK_SIZE -#define STACK_SIZE (2 * 1024 * 1024) -#endif - -/* The initial size of the thread stack. Must be a multiple of PAGE_SIZE. */ -#ifndef INITIAL_STACK_SIZE -#define INITIAL_STACK_SIZE (4 * PAGE_SIZE) -#endif - -/* Size of the thread manager stack. The "- 32" avoids wasting space - with some malloc() implementations. */ -#ifndef THREAD_MANAGER_STACK_SIZE -#define THREAD_MANAGER_STACK_SIZE (2 * PAGE_SIZE - 32) -#endif - -/* The base of the "array" of thread stacks. The array will grow down from - here. Defaults to the calculated bottom of the initial application - stack. */ -#ifndef THREAD_STACK_START_ADDRESS -#define THREAD_STACK_START_ADDRESS __pthread_initial_thread_bos -#endif - -/* Get some notion of the current stack. Need not be exactly the top - of the stack, just something somewhere in the current frame. */ -#ifndef CURRENT_STACK_FRAME -#define CURRENT_STACK_FRAME ({ char __csf; &__csf; }) -#endif - -/* Recover thread descriptor for the current thread */ - -extern pthread_descr __pthread_find_self (void) __attribute__ ((const)); - -static inline pthread_descr thread_self (void) __attribute__ ((const)); -static inline pthread_descr thread_self (void) -{ -#ifdef THREAD_SELF - return THREAD_SELF; -#else - char *sp = CURRENT_STACK_FRAME; - if (sp >= __pthread_initial_thread_bos) - return &__pthread_initial_thread; - else if (sp >= __pthread_manager_thread_bos - && sp < __pthread_manager_thread_tos) - return &__pthread_manager_thread; - else if (__pthread_nonstandard_stacks) - return __pthread_find_self(); - else -#ifdef _STACK_GROWS_DOWN - return (pthread_descr)(((unsigned long)sp | (STACK_SIZE-1))+1) - 1; -#else - return (pthread_descr)((unsigned long)sp &~ (STACK_SIZE-1)); -#endif -#endif -} - -/* If MEMORY_BARRIER isn't defined in pt-machine.h, assume the architecture - doesn't need a memory barrier instruction (e.g. Intel x86). Still we - need the compiler to respect the barrier and emit all outstanding - operations which modify memory. Some architectures distinguish between - full, read and write barriers. */ - -#ifndef MEMORY_BARRIER -#define MEMORY_BARRIER() asm ("" : : : "memory") -#endif -#ifndef READ_MEMORY_BARRIER -#define READ_MEMORY_BARRIER() MEMORY_BARRIER() -#endif -#ifndef WRITE_MEMORY_BARRIER -#define WRITE_MEMORY_BARRIER() MEMORY_BARRIER() -#endif - -/* Max number of times we must spin on a spinlock calling sched_yield(). - After MAX_SPIN_COUNT iterations, we put the calling thread to sleep. */ - -#ifndef MAX_SPIN_COUNT -#define MAX_SPIN_COUNT 50 -#endif - -/* Max number of times the spinlock in the adaptive mutex implementation - spins actively on SMP systems. */ - -#ifndef MAX_ADAPTIVE_SPIN_COUNT -#define MAX_ADAPTIVE_SPIN_COUNT 100 -#endif - -/* Duration of sleep (in nanoseconds) when we can't acquire a spinlock - after MAX_SPIN_COUNT iterations of sched_yield(). - With the 2.0 and 2.1 kernels, this MUST BE > 2ms. - (Otherwise the kernel does busy-waiting for realtime threads, - giving other threads no chance to run.) */ - -#ifndef SPIN_SLEEP_DURATION -#define SPIN_SLEEP_DURATION 2000001 -#endif - -/* Debugging */ - -#ifdef DEBUG -#include <assert.h> -#define ASSERT assert -#define MSG __pthread_message -#else -#define ASSERT(x) -#define MSG(msg,arg...) -#endif - -/* Internal global functions */ - -extern void __pthread_do_exit (void *retval, char *currentframe) - __attribute__ ((__noreturn__)); -extern void __pthread_destroy_specifics (void); -extern void __pthread_perform_cleanup (char *currentframe); -extern void __pthread_init_max_stacksize (void); -extern int __pthread_initialize_manager (void); -extern void __pthread_message (char * fmt, ...); -extern int __pthread_manager (void *reqfd); -extern int __pthread_manager_event (void *reqfd); -extern void __pthread_manager_sighandler (int sig); -extern void __pthread_reset_main_thread (void); -extern void __pthread_once_fork_prepare (void); -extern void __pthread_once_fork_parent (void); -extern void __pthread_once_fork_child (void); -extern void __flockfilelist (void); -extern void __funlockfilelist (void); -extern void __fresetlockfiles (void); -extern void __pthread_manager_adjust_prio (int thread_prio); -extern void __pthread_initialize_minimal (void); - -extern int __pthread_attr_setguardsize (pthread_attr_t *__attr, - size_t __guardsize); -extern int __pthread_attr_getguardsize (const pthread_attr_t *__attr, - size_t *__guardsize); -extern int __pthread_attr_setstackaddr (pthread_attr_t *__attr, - void *__stackaddr); -extern int __pthread_attr_getstackaddr (const pthread_attr_t *__attr, - void **__stackaddr); -extern int __pthread_attr_setstacksize (pthread_attr_t *__attr, - size_t __stacksize); -extern int __pthread_attr_getstacksize (const pthread_attr_t *__attr, - size_t *__stacksize); -extern int __pthread_attr_setstack (pthread_attr_t *__attr, void *__stackaddr, - size_t __stacksize); -extern int __pthread_attr_getstack (const pthread_attr_t *__attr, void **__stackaddr, - size_t *__stacksize); -extern int __pthread_getconcurrency (void); -extern int __pthread_setconcurrency (int __level); -extern int __pthread_mutex_timedlock (pthread_mutex_t *__mutex, - const struct timespec *__abstime); -extern int __pthread_mutexattr_getpshared (const pthread_mutexattr_t *__attr, - int *__pshared); -extern int __pthread_mutexattr_setpshared (pthread_mutexattr_t *__attr, - int __pshared); -extern int __pthread_mutexattr_gettype (const pthread_mutexattr_t *__attr, - int *__kind); -extern void __pthread_kill_other_threads_np (void); - -extern void __pthread_restart_old(pthread_descr th); -extern void __pthread_suspend_old(pthread_descr self); -extern int __pthread_timedsuspend_old(pthread_descr self, const struct timespec *abs); - -extern void __pthread_restart_new(pthread_descr th); -extern void __pthread_suspend_new(pthread_descr self); -extern int __pthread_timedsuspend_new(pthread_descr self, const struct timespec *abs); - -extern void __pthread_wait_for_restart_signal(pthread_descr self); - -extern int __pthread_yield (void); - -extern int __pthread_rwlock_timedrdlock (pthread_rwlock_t *__restrict __rwlock, - __const struct timespec *__restrict - __abstime); -extern int __pthread_rwlock_timedwrlock (pthread_rwlock_t *__restrict __rwlock, - __const struct timespec *__restrict - __abstime); -extern int __pthread_rwlockattr_destroy (pthread_rwlockattr_t *__attr); - -extern int __pthread_barrierattr_getpshared (__const pthread_barrierattr_t * - __restrict __attr, - int *__restrict __pshared); - -extern int __pthread_spin_lock (pthread_spinlock_t *__lock); -extern int __pthread_spin_trylock (pthread_spinlock_t *__lock); -extern int __pthread_spin_unlock (pthread_spinlock_t *__lock); -extern int __pthread_spin_init (pthread_spinlock_t *__lock, int __pshared); -extern int __pthread_spin_destroy (pthread_spinlock_t *__lock); - -extern int __pthread_clock_gettime (hp_timing_t freq, struct timespec *tp); -extern void __pthread_clock_settime (hp_timing_t offset); - - -/* Global pointers to old or new suspend functions */ - -extern void (*__pthread_restart)(pthread_descr); -extern void (*__pthread_suspend)(pthread_descr); -extern int (*__pthread_timedsuspend)(pthread_descr, const struct timespec *); - -/* Prototypes for the function without cancelation support when the - normal version has it. */ -extern int __libc_close (int fd); -extern int __libc_nanosleep (const struct timespec *requested_time, - struct timespec *remaining); -/* Prototypes for some of the new semaphore functions. */ -extern int __new_sem_post (sem_t * sem); -extern int __new_sem_init (sem_t *__sem, int __pshared, unsigned int __value); -extern int __new_sem_wait (sem_t *__sem); -extern int __new_sem_trywait (sem_t *__sem); -extern int __new_sem_getvalue (sem_t *__restrict __sem, int *__restrict __sval); -extern int __new_sem_destroy (sem_t *__sem); - -/* Prototypes for compatibility functions. */ -extern int __pthread_attr_init_2_1 (pthread_attr_t *__attr); -extern int __pthread_attr_init_2_0 (pthread_attr_t *__attr); -extern int __pthread_create_2_1 (pthread_t *__restrict __thread1, - const pthread_attr_t *__attr, - void *(*__start_routine) (void *), - void *__restrict __arg); -extern int __pthread_create_2_0 (pthread_t *__restrict __thread1, - const pthread_attr_t *__attr, - void *(*__start_routine) (void *), - void *__restrict arg); - -/* The functions called the signal events. */ -extern void __linuxthreads_create_event (void); -extern void __linuxthreads_death_event (void); -extern void __linuxthreads_reap_event (void); - -/* This function is called to initialize the pthread library. */ -extern void __pthread_initialize (void); - -#endif /* internals.h */ diff --git a/newlib/libc/sys/linux/linuxthreads/join.c b/newlib/libc/sys/linux/linuxthreads/join.c deleted file mode 100644 index a6ed08c97..000000000 --- a/newlib/libc/sys/linux/linuxthreads/join.c +++ /dev/null @@ -1,218 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Thread termination and joining */ - -#include <errno.h> -#include <sched.h> -#include <stdlib.h> -#include <unistd.h> -#include "pthread.h" -#include "internals.h" -#include "spinlock.h" -#include "restart.h" - -void pthread_exit(void * retval) -{ - __pthread_do_exit (retval, CURRENT_STACK_FRAME); -} - -void __pthread_do_exit(void *retval, char *currentframe) -{ - pthread_descr self = thread_self(); - pthread_descr joining; - struct pthread_request request; - - /* Reset the cancellation flag to avoid looping if the cleanup handlers - contain cancellation points */ - THREAD_SETMEM(self, p_canceled, 0); - /* Call cleanup functions and destroy the thread-specific data */ - __pthread_perform_cleanup(currentframe); - __pthread_destroy_specifics(); - /* Store return value */ - __pthread_lock(THREAD_GETMEM(self, p_lock), self); - THREAD_SETMEM(self, p_retval, retval); - /* See whether we have to signal the death. */ - if (THREAD_GETMEM(self, p_report_events)) - { - /* See whether TD_DEATH is in any of the mask. */ - int idx = __td_eventword (TD_DEATH); - uint32_t mask = __td_eventmask (TD_DEATH); - - if ((mask & (__pthread_threads_events.event_bits[idx] - | THREAD_GETMEM_NC(self, - p_eventbuf.eventmask.event_bits[idx]))) - != 0) - { - /* Yep, we have to signal the death. */ - THREAD_SETMEM(self, p_eventbuf.eventnum, TD_DEATH); - THREAD_SETMEM(self, p_eventbuf.eventdata, self); - __pthread_last_event = self; - - /* Now call the function to signal the event. */ - __linuxthreads_death_event(); - } - } - /* Say that we've terminated */ - THREAD_SETMEM(self, p_terminated, 1); - /* See if someone is joining on us */ - joining = THREAD_GETMEM(self, p_joining); - __pthread_unlock(THREAD_GETMEM(self, p_lock)); - /* Restart joining thread if any */ - if (joining != NULL) restart(joining); - /* If this is the initial thread, block until all threads have terminated. - If another thread calls exit, we'll be terminated from our signal - handler. */ - if (self == __pthread_main_thread && __pthread_manager_request >= 0) { - request.req_thread = self; - request.req_kind = REQ_MAIN_THREAD_EXIT; - TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request, - (char *)&request, sizeof(request))); - suspend(self); - /* Main thread flushes stdio streams and runs atexit functions. - It also calls a handler within LinuxThreads which sends a process exit - request to the thread manager. */ - exit(0); - } - /* Threads other than the main one terminate without flushing stdio streams - or running atexit functions. */ - _exit(0); -} - -/* Function called by pthread_cancel to remove the thread from - waiting on a condition variable queue. */ - -static int join_extricate_func(void *obj, pthread_descr th) -{ - volatile pthread_descr self = thread_self(); - pthread_handle handle = obj; - pthread_descr jo; - int did_remove = 0; - - __pthread_lock(&handle->h_lock, self); - jo = handle->h_descr; - did_remove = jo->p_joining != NULL; - jo->p_joining = NULL; - __pthread_unlock(&handle->h_lock); - - return did_remove; -} - -int pthread_join(pthread_t thread_id, void ** thread_return) -{ - volatile pthread_descr self = thread_self(); - struct pthread_request request; - pthread_handle handle = thread_handle(thread_id); - pthread_descr th; - pthread_extricate_if extr; - int already_canceled = 0; - - /* Set up extrication interface */ - extr.pu_object = handle; - extr.pu_extricate_func = join_extricate_func; - - __pthread_lock(&handle->h_lock, self); - if (nonexisting_handle(handle, thread_id)) { - __pthread_unlock(&handle->h_lock); - return ESRCH; - } - th = handle->h_descr; - if (th == self) { - __pthread_unlock(&handle->h_lock); - return EDEADLK; - } - /* If detached or already joined, error */ - if (th->p_detached || th->p_joining != NULL) { - __pthread_unlock(&handle->h_lock); - return EINVAL; - } - /* If not terminated yet, suspend ourselves. */ - if (! th->p_terminated) { - /* Register extrication interface */ - __pthread_set_own_extricate_if(self, &extr); - if (!(THREAD_GETMEM(self, p_canceled) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE)) - th->p_joining = self; - else - already_canceled = 1; - __pthread_unlock(&handle->h_lock); - - if (already_canceled) { - __pthread_set_own_extricate_if(self, 0); - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - } - - suspend(self); - /* Deregister extrication interface */ - __pthread_set_own_extricate_if(self, 0); - - /* This is a cancellation point */ - if (THREAD_GETMEM(self, p_woken_by_cancel) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE) { - THREAD_SETMEM(self, p_woken_by_cancel, 0); - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - } - __pthread_lock(&handle->h_lock, self); - } - /* Get return value */ - if (thread_return != NULL) *thread_return = th->p_retval; - __pthread_unlock(&handle->h_lock); - /* Send notification to thread manager */ - if (__pthread_manager_request >= 0) { - request.req_thread = self; - request.req_kind = REQ_FREE; - request.req_args.free.thread_id = thread_id; - TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request, - (char *) &request, sizeof(request))); - } - return 0; -} - -int pthread_detach(pthread_t thread_id) -{ - int terminated; - struct pthread_request request; - pthread_handle handle = thread_handle(thread_id); - pthread_descr th; - - __pthread_lock(&handle->h_lock, NULL); - if (nonexisting_handle(handle, thread_id)) { - __pthread_unlock(&handle->h_lock); - return ESRCH; - } - th = handle->h_descr; - /* If already detached, error */ - if (th->p_detached) { - __pthread_unlock(&handle->h_lock); - return EINVAL; - } - /* If already joining, don't do anything. */ - if (th->p_joining != NULL) { - __pthread_unlock(&handle->h_lock); - return 0; - } - /* Mark as detached */ - th->p_detached = 1; - terminated = th->p_terminated; - __pthread_unlock(&handle->h_lock); - /* If already terminated, notify thread manager to reclaim resources */ - if (terminated && __pthread_manager_request >= 0) { - request.req_thread = thread_self(); - request.req_kind = REQ_FREE; - request.req_args.free.thread_id = thread_id; - TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request, - (char *) &request, sizeof(request))); - } - return 0; -} diff --git a/newlib/libc/sys/linux/linuxthreads/joinrace.c b/newlib/libc/sys/linux/linuxthreads/joinrace.c deleted file mode 100644 index 8e1064c98..000000000 --- a/newlib/libc/sys/linux/linuxthreads/joinrace.c +++ /dev/null @@ -1,48 +0,0 @@ -/* Test case by Permaine Cheung <pcheung@cygnus.com>. */ - -#include <errno.h> -#include <pthread.h> -#include <stdio.h> -#include <stdlib.h> - -static void * -sub1 (void *arg) -{ - /* Nothing. */ - return NULL; -} - -int -main (void) -{ - int istatus; - int policy; - int cnt; - pthread_t thread1; - struct sched_param spresult1, sp1; - - for (cnt = 0; cnt < 100; ++cnt) - { - printf ("Round %d\n", cnt); - - pthread_create (&thread1, NULL, &sub1, NULL); - pthread_join (thread1, NULL); - - istatus = pthread_getschedparam (thread1, &policy, &spresult1); - if (istatus != ESRCH) - { - printf ("pthread_getschedparam returns: %d\n", istatus); - return 1; - } - - sp1.sched_priority = 0; - istatus = pthread_setschedparam (thread1, SCHED_OTHER, &sp1); - if (istatus != ESRCH) - { - printf ("pthread_setschedparam returns: %d\n", istatus); - return 2; - } - } - - return 0; -} diff --git a/newlib/libc/sys/linux/linuxthreads/kernel-features.h b/newlib/libc/sys/linux/linuxthreads/kernel-features.h deleted file mode 100644 index 562a6c765..000000000 --- a/newlib/libc/sys/linux/linuxthreads/kernel-features.h +++ /dev/null @@ -1,193 +0,0 @@ -/* Set flags signalling availability of kernel features based on given - kernel version number. - Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -/* This file must not contain any C code. At least it must be protected - to allow using the file also in assembler files. */ - -#ifndef __LINUX_KERNEL_VERSION -/* We assume the worst; all kernels should be supported. */ -# define __LINUX_KERNEL_VERSION 0 -#endif - -/* We assume for __LINUX_KERNEL_VERSION the same encoding used in - linux/version.h. I.e., the major, minor, and subminor all get a - byte with the major number being in the highest byte. This means - we can do numeric comparisons. - - In the following we will define certain symbols depending on - whether the describes kernel feature is available in the kernel - version given by __LINUX_KERNEL_VERSION. We are not always exactly - recording the correct versions in which the features were - introduced. If somebody cares these values can afterwards be - corrected. Most of the numbers here are set corresponding to - 2.2.0. */ - -/* `getcwd' system call. */ -#if __LINUX_KERNEL_VERSION >= 131584 -# define __ASSUME_GETCWD_SYSCALL 1 -#endif - -/* Real-time signal became usable in 2.1.70. */ -#if __LINUX_KERNEL_VERSION >= 131398 -# define __ASSUME_REALTIME_SIGNALS 1 -#endif - -/* When were the `pread'/`pwrite' syscalls introduced? */ -#if __LINUX_KERNEL_VERSION >= 131584 -# define __ASSUME_PREAD_SYSCALL 1 -# define __ASSUME_PWRITE_SYSCALL 1 -#endif - -/* When was `poll' introduced? */ -#if __LINUX_KERNEL_VERSION >= 131584 -# define __ASSUME_POLL_SYSCALL 1 -#endif - -/* The `lchown' syscall was introduced in 2.1.80. */ -#if __LINUX_KERNEL_VERSION >= 131408 -# define __ASSUME_LCHOWN_SYSCALL 1 -#endif - -/* When did the `setresuid' sysall became available? */ -#if __LINUX_KERNEL_VERSION >= 131584 && !defined __sparc__ -# define __ASSUME_SETRESUID_SYSCALL 1 -#endif - -/* The SIOCGIFNAME ioctl is available starting with 2.1.50. */ -#if __LINUX_KERNEL_VERSION >= 131408 -# define __ASSUME_SIOCGIFNAME 1 -#endif - -/* On x86 another `getrlimit' syscall was added in 2.3.25. */ -#if __LINUX_KERNEL_VERSION >= 131865 && defined __i386__ -# define __ASSUME_NEW_GETRLIMIT_SYSCALL 1 -#endif - -/* On x86 the truncate64/ftruncate64 syscalls were introduced in 2.3.31. */ -#if __LINUX_KERNEL_VERSION >= 131871 && defined __i386__ -# define __ASSUME_TRUNCATE64_SYSCALL 1 -#endif - -/* On x86 the mmap2 syscall was introduced in 2.3.31. */ -#if __LINUX_KERNEL_VERSION >= 131871 && defined __i386__ -# define __ASSUME_MMAP2_SYSCALL 1 -#endif - -/* On x86 the stat64/lstat64/fstat64 syscalls were introduced in 2.3.34. */ -#if __LINUX_KERNEL_VERSION >= 131874 && defined __i386__ -# define __ASSUME_STAT64_SYSCALL 1 -#endif - -/* On sparc and ARM the truncate64/ftruncate64/mmap2/stat64/lstat64/fstat64 - syscalls were introduced in 2.3.35. */ -#if __LINUX_KERNEL_VERSION >= 131875 && (defined __sparc__ || defined __arm__) -# define __ASSUME_TRUNCATE64_SYSCALL 1 -# define __ASSUME_MMAP2_SYSCALL 1 -# define __ASSUME_STAT64_SYSCALL 1 -#endif - -/* I know for sure that these are in 2.3.35 on powerpc. */ -#if __LINUX_KERNEL_VERSION >= 131875 && defined __powerpc__ -# define __ASSUME_TRUNCATE64_SYSCALL 1 -# define __ASSUME_STAT64_SYSCALL 1 -# define __ASSUME_NEW_GETRLIMIT_SYSCALL 1 -#endif - -/* Linux 2.3.39 introduced 32bit UID/GIDs and IPC64. Some platforms had 32 - bit type all along. */ -#if __LINUX_KERNEL_VERSION >= 131879 || defined __powerpc__ || defined __mips__ -# define __ASSUME_32BITUIDS 1 -# ifndef __powerpc__ -# define __ASSUME_IPC64 1 -# endif -# ifdef __sparc__ -# define __ASSUME_SETRESUID_SYSCALL 1 -# endif -#endif - -/* Linux 2.4.0 on PPC introduced a correct IPC64. */ -#if __LINUX_KERNEL_VERSION >= 132096 && defined __powerpc__ -# define __ASSUME_IPC64 1 -#endif - -/* We can use the LDTs for threading with Linux 2.3.99 and newer. */ -#if __LINUX_KERNEL_VERSION >= 131939 -# define __ASSUME_LDT_WORKS 1 -#endif - -/* The changed st_ino field appeared in 2.4.0-test6. But we cannot - distinguish this version from other 2.4.0 releases. Therefore play - save and assume it available is for 2.4.1 and up. */ -#if __LINUX_KERNEL_VERSION >= 132097 -# define __ASSUME_ST_INO_64_BIT 1 -#endif - -/* To support locking of large files a new fcntl() syscall was introduced - in 2.4.0-test7. We test for 2.4.1 for the earliest version we know - the syscall is available. */ -#if __LINUX_KERNEL_VERSION >= 132097 && (defined __i386__ || defined __sparc__) -# define __ASSUME_FCNTL64 1 -#endif - -/* Arm got fcntl64 in 2.4.4, PowerPC and SH have it also in 2.4.4 (I - don't know when it got introduced). */ -#if __LINUX_KERNEL_VERSION >= 132100 \ - && (defined __arm__ || defined __powerpc__ || defined __sh__) -# define __ASSUME_FCNTL64 1 -#endif - -/* The getdents64 syscall was introduced in 2.4.0-test7. We test for - 2.4.1 for the earliest version we know the syscall is available. */ -#if __LINUX_KERNEL_VERSION >= 132097 -# define __ASSUME_GETDENTS64_SYSCALL 1 -#endif - -/* When did O_DIRECTORY became available? Early in 2.3 but when? - Be safe, use 2.3.99. */ -#if __LINUX_KERNEL_VERSION >= 131939 -# define __ASSUME_O_DIRECTORY 1 -#endif - -/* Starting with one of the 2.4.0 pre-releases the Linux kernel passes - up the page size information. */ -#if __LINUX_KERNEL_VERSION >= 132097 -# define __ASSUME_AT_PAGESIZE 1 -#endif - -/* Starting with 2.4.5 kernels PPC passes the AUXV in the standard way - and the mmap2 syscall made it into the official kernel. */ -#if __LINUX_KERNEL_VERSION >= (132096+5) && defined __powerpc__ -# define __ASSUME_STD_AUXV 1 -# define __ASSUME_MMAP2_SYSCALL 1 -#endif - -/* There are an infinite number of PA-RISC kernel versions numbered - 2.4.0. But they've not really been released as such. We require - and expect the final version here. */ -#ifdef __hppa__ -# define __ASSUME_32BITUIDS 1 -# define __ASSUME_TRUNCATE64_SYSCALL 1 -# define __ASSUME_MMAP2_SYSCALL 1 -# define __ASSUME_STAT64_SYSCALL 1 -# define __ASSUME_IPC64 1 -# define __ASSUME_ST_INO_64_BIT 1 -# define __ASSUME_FCNTL64 1 -# define __ASSUME_GETDENTS64_SYSCALL 1 -#endif diff --git a/newlib/libc/sys/linux/linuxthreads/libc-internal.h b/newlib/libc/sys/linux/linuxthreads/libc-internal.h deleted file mode 100644 index 8369ffec2..000000000 --- a/newlib/libc/sys/linux/linuxthreads/libc-internal.h +++ /dev/null @@ -1,29 +0,0 @@ -/* This file contains a number of internal prototype declarations that - don't fit anywhere else. */ - -#ifndef _LIBC_INTERNAL -# define _LIBC_INTERNAL 1 - -#include <hp-timing.h> - -/* Initialize the `__libc_enable_secure' flag. */ -extern void __libc_init_secure (void); - -/* This function will be called from _init in init-first.c. */ -extern void __libc_global_ctors (void); - -/* Discover the tick frequency of the machine if something goes wrong, - we return 0, an impossible hertz. */ -extern int __profile_frequency (void); - -/* Hooks for the instrumenting functions. */ -extern void __cyg_profile_func_enter (void *this_fn, void *call_site); -extern void __cyg_profile_func_exit (void *this_fn, void *call_site); - -/* Get frequency of the system processor. */ -extern hp_timing_t __get_clockfreq (void); - -/* Free all allocated resources. */ -extern void __libc_freeres (void); - -#endif /* _LIBC_INTERNAL */ diff --git a/newlib/libc/sys/linux/linuxthreads/libc-symbols.h b/newlib/libc/sys/linux/linuxthreads/libc-symbols.h deleted file mode 100644 index 97b672643..000000000 --- a/newlib/libc/sys/linux/linuxthreads/libc-symbols.h +++ /dev/null @@ -1,352 +0,0 @@ -/* Support macros for making weak and strong aliases for symbols, - and for using symbol sets and linker warnings with GNU ld. - Copyright (C) 1995,1996,1997,1998,2000,2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#ifndef _LIBC_SYMBOLS_H -#define _LIBC_SYMBOLS_H 1 - -/* This file's macros are included implicitly in the compilation of every - file in the C library by -imacros. - - We include config.h which is generated by configure. - It should define for us the following symbols: - - * HAVE_ASM_SET_DIRECTIVE if we have `.set B, A' instead of `A = B'. - * ASM_GLOBAL_DIRECTIVE with `.globl' or `.global'. - * HAVE_GNU_LD if using GNU ld, with support for weak symbols in a.out, - and for symbol set and warning messages extensions in a.out and ELF. - * HAVE_ELF if using ELF, which supports weak symbols using `.weak'. - * HAVE_ASM_WEAK_DIRECTIVE if we have weak symbols using `.weak'. - * HAVE_ASM_WEAKEXT_DIRECTIVE if we have weak symbols using `.weakext'. - - */ - -/* This is defined for the compilation of all C library code. features.h - tests this to avoid inclusion of stubs.h while compiling the library, - before stubs.h has been generated. Some library code that is shared - with other packages also tests this symbol to see if it is being - compiled as part of the C library. We must define this before including - config.h, because it makes some definitions conditional on whether libc - itself is being compiled, or just some generator program. */ -#define _LIBC 1 - -/* Enable declarations of GNU extensions, since we are compiling them. */ -#define _GNU_SOURCE 1 -/* And we also need the data for the reentrant functions. */ -#define _REENTRANT 1 - -#include <config.h> - -/* The symbols in all the user (non-_) macros are C symbols. - HAVE_GNU_LD without HAVE_ELF implies a.out. */ - -#if defined HAVE_ASM_WEAK_DIRECTIVE || defined HAVE_ASM_WEAKEXT_DIRECTIVE -# define HAVE_WEAK_SYMBOLS -#endif - -#ifndef __SYMBOL_PREFIX -# ifdef NO_UNDERSCORES -# define __SYMBOL_PREFIX -# else -# define __SYMBOL_PREFIX "_" -# endif -#endif - -#ifndef C_SYMBOL_NAME -# ifdef NO_UNDERSCORES -# define C_SYMBOL_NAME(name) name -# else -# define C_SYMBOL_NAME(name) _##name -# endif -#endif - -#ifndef ASM_LINE_SEP -# define ASM_LINE_SEP ; -#endif - -#ifndef C_SYMBOL_DOT_NAME -# define C_SYMBOL_DOT_NAME(name) .##name -#endif - -#ifndef __ASSEMBLER__ -/* GCC understands weak symbols and aliases; use its interface where - possible, instead of embedded assembly language. */ - -/* Define ALIASNAME as a strong alias for NAME. */ -# define strong_alias(name, aliasname) _strong_alias(name, aliasname) -# define _strong_alias(name, aliasname) \ - extern __typeof (name) aliasname __attribute__ ((alias (#name))); - -/* This comes between the return type and function name in - a function definition to make that definition weak. */ -# define weak_function __attribute__ ((weak)) -# define weak_const_function __attribute__ ((weak, __const__)) - -# ifdef HAVE_WEAK_SYMBOLS - -/* Define ALIASNAME as a weak alias for NAME. - If weak aliases are not available, this defines a strong alias. */ -# define weak_alias(name, aliasname) _weak_alias (name, aliasname) -# define _weak_alias(name, aliasname) \ - extern __typeof (name) aliasname __attribute__ ((weak, alias (#name))); - -/* Declare SYMBOL as weak undefined symbol (resolved to 0 if not defined). */ -# define weak_extern(symbol) _weak_extern (symbol) -# ifdef HAVE_ASM_WEAKEXT_DIRECTIVE -# define _weak_extern(symbol) asm (".weakext " __SYMBOL_PREFIX #symbol); -# else -# define _weak_extern(symbol) asm (".weak " __SYMBOL_PREFIX #symbol); -# endif - -# else - -# define weak_alias(name, aliasname) strong_alias(name, aliasname) -# define weak_extern(symbol) /* Nothing. */ - -# endif - -#else /* __ASSEMBLER__ */ - -# ifdef HAVE_ASM_SET_DIRECTIVE -# define strong_alias(original, alias) \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - .set C_SYMBOL_NAME (alias),C_SYMBOL_NAME (original) -# else -# ifdef HAVE_ASM_GLOBAL_DOT_NAME -# define strong_alias(original, alias) \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_DOT_NAME (alias) = C_SYMBOL_DOT_NAME (original) -# else -# define strong_alias(original, alias) \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) -# endif -# endif - -# ifdef HAVE_WEAK_SYMBOLS -# ifdef HAVE_ASM_WEAKEXT_DIRECTIVE -# define weak_alias(original, alias) \ - .weakext C_SYMBOL_NAME (alias), C_SYMBOL_NAME (original) -# define weak_extern(symbol) \ - .weakext C_SYMBOL_NAME (symbol) - -# else /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */ - -# ifdef HAVE_ASM_GLOBAL_DOT_NAME -# define weak_alias(original, alias) \ - .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) ASM_LINE_SEP \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_DOT_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_DOT_NAME (alias) = C_SYMBOL_DOT_NAME (original) -# else -# define weak_alias(original, alias) \ - .weak C_SYMBOL_NAME (alias) ASM_LINE_SEP \ - C_SYMBOL_NAME (alias) = C_SYMBOL_NAME (original) -# endif - -# define weak_extern(symbol) \ - .weak C_SYMBOL_NAME (symbol) - -# endif /* ! HAVE_ASM_WEAKEXT_DIRECTIVE */ - -# else /* ! HAVE_WEAK_SYMBOLS */ - -# define weak_alias(original, alias) strong_alias(original, alias) -# define weak_extern(symbol) /* Nothing */ -# endif /* ! HAVE_WEAK_SYMBOLS */ - -#endif /* __ASSEMBLER__ */ - -/* On some platforms we can make internal function calls (i.e., calls of - functions not exported) a bit faster by using a different calling - convention. */ -#ifndef internal_function -# define internal_function /* empty */ -#endif - -/* Prepare for the case that `__builtin_expect' is not available. */ -#ifndef HAVE_BUILTIN_EXPECT -# define __builtin_expect(expr, val) (expr) -#endif - -/* Determine the return address. */ -#define RETURN_ADDRESS(nr) \ - __builtin_extract_return_addr (__builtin_return_address (nr)) - -/* When a reference to SYMBOL is encountered, the linker will emit a - warning message MSG. */ -#ifdef HAVE_GNU_LD -# ifdef HAVE_ELF - -/* We want the .gnu.warning.SYMBOL section to be unallocated. */ -# ifdef HAVE_ASM_PREVIOUS_DIRECTIVE -# define __make_section_unallocated(section_string) \ - asm (".section " section_string "\n\t.previous"); -# elif defined HAVE_ASM_POPSECTION_DIRECTIVE -# define __make_section_unallocated(section_string) \ - asm (".pushsection " section_string "\n\t.popsection"); -# else -# define __make_section_unallocated(section_string) -# endif - -/* Tacking on "\n\t#" to the section name makes gcc put it's bogus - section attributes on what looks like a comment to the assembler. */ -# ifdef HAVE_SECTION_QUOTES -# define link_warning(symbol, msg) \ - __make_section_unallocated (".gnu.warning." #symbol) \ - static const char __evoke_link_warning_##symbol[] \ - __attribute__ ((section (".gnu.warning." #symbol "\"\n\t#\""))) = msg; -# else -# define link_warning(symbol, msg) \ - __make_section_unallocated (".gnu.warning." #symbol) \ - static const char __evoke_link_warning_##symbol[] \ - __attribute__ ((section (".gnu.warning." #symbol "\n\t#"))) = msg; -# endif -# else /* Not ELF: a.out */ -# ifdef HAVE_XCOFF -/* XCOFF does not support .stabs. - The native aix linker will remove the .stab and .stabstr sections - The gnu linker will have a fatal error if there is a relocation for - symbol in the .stab section. Silently disable this macro. */ -# define link_warning(symbol, msg) -# else -# define link_warning(symbol, msg) \ - asm (".stabs \"" msg "\",30,0,0,0\n\t" \ - ".stabs \"" __SYMBOL_PREFIX #symbol "\",1,0,0,0\n"); -# endif /* XCOFF */ -# endif -#else -/* We will never be heard; they will all die horribly. */ -# define link_warning(symbol, msg) -#endif - -/* A canned warning for sysdeps/stub functions. */ -#define stub_warning(name) \ - link_warning (name, \ - "warning: " #name " is not implemented and will always fail") - -/* - -*/ - -#ifdef HAVE_GNU_LD - -/* Symbol set support macros. */ - -# ifdef HAVE_ELF - -/* Make SYMBOL, which is in the text segment, an element of SET. */ -# define text_set_element(set, symbol) _elf_set_element(set, symbol) -/* Make SYMBOL, which is in the data segment, an element of SET. */ -# define data_set_element(set, symbol) _elf_set_element(set, symbol) -/* Make SYMBOL, which is in the bss segment, an element of SET. */ -# define bss_set_element(set, symbol) _elf_set_element(set, symbol) - -/* These are all done the same way in ELF. - There is a new section created for each set. */ -# ifdef SHARED -/* When building a shared library, make the set section writable, - because it will need to be relocated at run time anyway. */ -# define _elf_set_element(set, symbol) \ - static const void *__elf_set_##set##_element_##symbol##__ \ - __attribute__ ((unused, section (#set))) = &(symbol) -# else -# define _elf_set_element(set, symbol) \ - static const void *const __elf_set_##set##_element_##symbol##__ \ - __attribute__ ((unused, section (#set))) = &(symbol) -# endif - -/* Define SET as a symbol set. This may be required (it is in a.out) to - be able to use the set's contents. */ -# define symbol_set_define(set) symbol_set_declare(set) - -/* Declare SET for use in this module, if defined in another module. */ -# define symbol_set_declare(set) \ - extern void *const __start_##set __attribute__ ((__weak__)); \ - extern void *const __stop_##set __attribute__ ((__weak__)); \ - weak_extern (__start_##set) weak_extern (__stop_##set) - -/* Return a pointer (void *const *) to the first element of SET. */ -# define symbol_set_first_element(set) (&__start_##set) - -/* Return true iff PTR (a void *const *) has been incremented - past the last element in SET. */ -# define symbol_set_end_p(set, ptr) ((ptr) >= &__stop_##set) - -# else /* Not ELF: a.out. */ - -# ifdef HAVE_XCOFF -/* XCOFF does not support .stabs. - The native aix linker will remove the .stab and .stabstr sections - The gnu linker will have a fatal error if there is a relocation for - symbol in the .stab section. Silently disable these macros. */ -# define text_set_element(set, symbol) -# define data_set_element(set, symbol) -# define bss_set_element(set, symbol) -# else -# define text_set_element(set, symbol) \ - asm (".stabs \"" __SYMBOL_PREFIX #set "\",23,0,0," __SYMBOL_PREFIX #symbol) -# define data_set_element(set, symbol) \ - asm (".stabs \"" __SYMBOL_PREFIX #set "\",25,0,0," __SYMBOL_PREFIX #symbol) -# define bss_set_element(set, symbol) ?error Must use initialized data. -# endif /* XCOFF */ -# define symbol_set_define(set) void *const (set)[1]; -# define symbol_set_declare(set) extern void *const (set)[1]; - -# define symbol_set_first_element(set) &(set)[1] -# define symbol_set_end_p(set, ptr) (*(ptr) == 0) - -# endif /* ELF. */ -#else -/* We cannot do anything in generial. */ -# define text_set_element(set, symbol) asm ("") -# define data_set_element(set, symbol) asm ("") -# define bss_set_element(set, symbol) asm ("") -# define symbol_set_define(set) void *const (set)[1]; -# define symbol_set_declare(set) extern void *const (set)[1]; - -# define symbol_set_first_element(set) &(set)[1] -# define symbol_set_end_p(set, ptr) (*(ptr) == 0) -#endif /* Have GNU ld. */ - -#if DO_VERSIONING -# define symbol_version(real, name, version) \ - _symbol_version(real, name, version) -# define default_symbol_version(real, name, version) \ - _default_symbol_version(real, name, version) -# ifdef __ASSEMBLER__ -# define _symbol_version(real, name, version) \ - .symver real, name##@##version -# define _default_symbol_version(real, name, version) \ - .symver real, name##@##@##version -# else -# define _symbol_version(real, name, version) \ - __asm__ (".symver " #real "," #name "@" #version) -# define _default_symbol_version(real, name, version) \ - __asm__ (".symver " #real "," #name "@@" #version) -# endif -#else -# define symbol_version(real, name, version) -# define default_symbol_version(real, name, version) \ - strong_alias(real, name) -#endif - -#endif /* libc-symbols.h */ diff --git a/newlib/libc/sys/linux/linuxthreads/linuxthreads.texi b/newlib/libc/sys/linux/linuxthreads/linuxthreads.texi deleted file mode 100644 index 9513a67a6..000000000 --- a/newlib/libc/sys/linux/linuxthreads/linuxthreads.texi +++ /dev/null @@ -1,1630 +0,0 @@ -@node POSIX Threads -@c @node POSIX Threads, , Top, Top -@chapter POSIX Threads -@c %MENU% The standard threads library - -@c This chapter needs more work bigtime. -zw - -This chapter describes the pthreads (POSIX threads) library. This -library provides support functions for multithreaded programs: thread -primitives, synchronization objects, and so forth. It also implements -POSIX 1003.1b semaphores (not to be confused with System V semaphores). - -The threads operations (@samp{pthread_*}) do not use @var{errno}. -Instead they return an error code directly. The semaphore operations do -use @var{errno}. - -@menu -* Basic Thread Operations:: Creating, terminating, and waiting for threads. -* Thread Attributes:: Tuning thread scheduling. -* Cancellation:: Stopping a thread before it's done. -* Cleanup Handlers:: Deallocating resources when a thread is - canceled. -* Mutexes:: One way to synchronize threads. -* Condition Variables:: Another way. -* POSIX Semaphores:: And a third way. -* Thread-Specific Data:: Variables with different values in - different threads. -* Threads and Signal Handling:: Why you should avoid mixing the two, and - how to do it if you must. -* Threads and Fork:: Interactions between threads and the - @code{fork} function. -* Streams and Fork:: Interactions between stdio streams and - @code{fork}. -* Miscellaneous Thread Functions:: A grab bag of utility routines. -@end menu - -@node Basic Thread Operations -@section Basic Thread Operations - -These functions are the thread equivalents of @code{fork}, @code{exit}, -and @code{wait}. - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_create (pthread_t * @var{thread}, pthread_attr_t * @var{attr}, void * (*@var{start_routine})(void *), void * @var{arg}) -@code{pthread_create} creates a new thread of control that executes -concurrently with the calling thread. The new thread calls the -function @var{start_routine}, passing it @var{arg} as first argument. The -new thread terminates either explicitly, by calling @code{pthread_exit}, -or implicitly, by returning from the @var{start_routine} function. The -latter case is equivalent to calling @code{pthread_exit} with the result -returned by @var{start_routine} as exit code. - -The @var{attr} argument specifies thread attributes to be applied to the -new thread. @xref{Thread Attributes}, for details. The @var{attr} -argument can also be @code{NULL}, in which case default attributes are -used: the created thread is joinable (not detached) and has an ordinary -(not realtime) scheduling policy. - -On success, the identifier of the newly created thread is stored in the -location pointed by the @var{thread} argument, and a 0 is returned. On -error, a non-zero error code is returned. - -This function may return the following errors: -@table @code -@item EAGAIN -Not enough system resources to create a process for the new thread, -or more than @code{PTHREAD_THREADS_MAX} threads are already active. -@end table -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun void pthread_exit (void *@var{retval}) -@code{pthread_exit} terminates the execution of the calling thread. All -cleanup handlers (@pxref{Cleanup Handlers}) that have been set for the -calling thread with @code{pthread_cleanup_push} are executed in reverse -order (the most recently pushed handler is executed first). Finalization -functions for thread-specific data are then called for all keys that -have non-@code{NULL} values associated with them in the calling thread -(@pxref{Thread-Specific Data}). Finally, execution of the calling -thread is stopped. - -The @var{retval} argument is the return value of the thread. It can be -retrieved from another thread using @code{pthread_join}. - -The @code{pthread_exit} function never returns. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_cancel (pthread_t @var{thread}) - -@code{pthread_cancel} sends a cancellation request to the thread denoted -by the @var{thread} argument. If there is no such thread, -@code{pthread_cancel} fails and returns @code{ESRCH}. Otherwise it -returns 0. @xref{Cancellation}, for details. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_join (pthread_t @var{th}, void **thread_@var{return}) -@code{pthread_join} suspends the execution of the calling thread until -the thread identified by @var{th} terminates, either by calling -@code{pthread_exit} or by being canceled. - -If @var{thread_return} is not @code{NULL}, the return value of @var{th} -is stored in the location pointed to by @var{thread_return}. The return -value of @var{th} is either the argument it gave to @code{pthread_exit}, -or @code{PTHREAD_CANCELED} if @var{th} was canceled. - -The joined thread @code{th} must be in the joinable state: it must not -have been detached using @code{pthread_detach} or the -@code{PTHREAD_CREATE_DETACHED} attribute to @code{pthread_create}. - -When a joinable thread terminates, its memory resources (thread -descriptor and stack) are not deallocated until another thread performs -@code{pthread_join} on it. Therefore, @code{pthread_join} must be called -once for each joinable thread created to avoid memory leaks. - -At most one thread can wait for the termination of a given -thread. Calling @code{pthread_join} on a thread @var{th} on which -another thread is already waiting for termination returns an error. - -@code{pthread_join} is a cancellation point. If a thread is canceled -while suspended in @code{pthread_join}, the thread execution resumes -immediately and the cancellation is executed without waiting for the -@var{th} thread to terminate. If cancellation occurs during -@code{pthread_join}, the @var{th} thread remains not joined. - -On success, the return value of @var{th} is stored in the location -pointed to by @var{thread_return}, and 0 is returned. On error, one of -the following values is returned: -@table @code -@item ESRCH -No thread could be found corresponding to that specified by @var{th}. -@item EINVAL -The @var{th} thread has been detached, or another thread is already -waiting on termination of @var{th}. -@item EDEADLK -The @var{th} argument refers to the calling thread. -@end table -@end deftypefun - -@node Thread Attributes -@section Thread Attributes - -@comment pthread.h -@comment POSIX - -Threads have a number of attributes that may be set at creation time. -This is done by filling a thread attribute object @var{attr} of type -@code{pthread_attr_t}, then passing it as second argument to -@code{pthread_create}. Passing @code{NULL} is equivalent to passing a -thread attribute object with all attributes set to their default values. - -Attribute objects are consulted only when creating a new thread. The -same attribute object can be used for creating several threads. -Modifying an attribute object after a call to @code{pthread_create} does -not change the attributes of the thread previously created. - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_attr_init (pthread_attr_t *@var{attr}) -@code{pthread_attr_init} initializes the thread attribute object -@var{attr} and fills it with default values for the attributes. (The -default values are listed below for each attribute.) - -Each attribute @var{attrname} (see below for a list of all attributes) -can be individually set using the function -@code{pthread_attr_set@var{attrname}} and retrieved using the function -@code{pthread_attr_get@var{attrname}}. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_attr_destroy (pthread_attr_t *@var{attr}) -@code{pthread_attr_destroy} destroys the attribute object pointed to by -@var{attr} releasing any resources associated with it. @var{attr} is -left in an undefined state, and you must not use it again in a call to -any pthreads function until it has been reinitialized. -@end deftypefun - -@findex pthread_attr_setdetachstate -@findex pthread_attr_setguardsize -@findex pthread_attr_setinheritsched -@findex pthread_attr_setschedparam -@findex pthread_attr_setschedpolicy -@findex pthread_attr_setscope -@findex pthread_attr_setstack -@findex pthread_attr_setstackaddr -@findex pthread_attr_setstacksize -@comment pthread.h -@comment POSIX -@deftypefun int pthread_attr_setattr (pthread_attr_t *@var{obj}, int @var{value}) -Set attribute @var{attr} to @var{value} in the attribute object pointed -to by @var{obj}. See below for a list of possible attributes and the -values they can take. - -On success, these functions return 0. If @var{value} is not meaningful -for the @var{attr} being modified, they will return the error code -@code{EINVAL}. Some of the functions have other failure modes; see -below. -@end deftypefun - -@findex pthread_attr_getdetachstate -@findex pthread_attr_getguardsize -@findex pthread_attr_getinheritsched -@findex pthread_attr_getschedparam -@findex pthread_attr_getschedpolicy -@findex pthread_attr_getscope -@findex pthread_attr_getstack -@findex pthread_attr_getstackaddr -@findex pthread_attr_getstacksize -@comment pthread.h -@comment POSIX -@deftypefun int pthread_attr_getattr (const pthread_attr_t *@var{obj}, int *@var{value}) -Store the current setting of @var{attr} in @var{obj} into the variable -pointed to by @var{value}. - -These functions always return 0. -@end deftypefun - -The following thread attributes are supported: -@table @samp -@item detachstate -Choose whether the thread is created in the joinable state (value -@code{PTHREAD_CREATE_JOINABLE}) or in the detached state -(@code{PTHREAD_CREATE_DETACHED}). The default is -@code{PTHREAD_CREATE_JOINABLE}. - -In the joinable state, another thread can synchronize on the thread -termination and recover its termination code using @code{pthread_join}, -but some of the thread resources are kept allocated after the thread -terminates, and reclaimed only when another thread performs -@code{pthread_join} on that thread. - -In the detached state, the thread resources are immediately freed when -it terminates, but @code{pthread_join} cannot be used to synchronize on -the thread termination. - -A thread created in the joinable state can later be put in the detached -thread using @code{pthread_detach}. - -@item schedpolicy -Select the scheduling policy for the thread: one of @code{SCHED_OTHER} -(regular, non-realtime scheduling), @code{SCHED_RR} (realtime, -round-robin) or @code{SCHED_FIFO} (realtime, first-in first-out). -The default is @code{SCHED_OTHER}. -@c Not doc'd in our manual: FIXME. -@c See @code{sched_setpolicy} for more information on scheduling policies. - -The realtime scheduling policies @code{SCHED_RR} and @code{SCHED_FIFO} -are available only to processes with superuser privileges. -@code{pthread_attr_setschedparam} will fail and return @code{ENOTSUP} if -you try to set a realtime policy when you are unprivileged. - -The scheduling policy of a thread can be changed after creation with -@code{pthread_setschedparam}. - -@item schedparam -Change the scheduling parameter (the scheduling priority) -for the thread. The default is 0. - -This attribute is not significant if the scheduling policy is -@code{SCHED_OTHER}; it only matters for the realtime policies -@code{SCHED_RR} and @code{SCHED_FIFO}. - -The scheduling priority of a thread can be changed after creation with -@code{pthread_setschedparam}. - -@item inheritsched -Choose whether the scheduling policy and scheduling parameter for the -newly created thread are determined by the values of the -@var{schedpolicy} and @var{schedparam} attributes (value -@code{PTHREAD_EXPLICIT_SCHED}) or are inherited from the parent thread -(value @code{PTHREAD_INHERIT_SCHED}). The default is -@code{PTHREAD_EXPLICIT_SCHED}. - -@item scope -Choose the scheduling contention scope for the created thread. The -default is @code{PTHREAD_SCOPE_SYSTEM}, meaning that the threads contend -for CPU time with all processes running on the machine. In particular, -thread priorities are interpreted relative to the priorities of all -other processes on the machine. The other possibility, -@code{PTHREAD_SCOPE_PROCESS}, means that scheduling contention occurs -only between the threads of the running process: thread priorities are -interpreted relative to the priorities of the other threads of the -process, regardless of the priorities of other processes. - -@code{PTHREAD_SCOPE_PROCESS} is not supported in LinuxThreads. If you -try to set the scope to this value, @code{pthread_attr_setscope} will -fail and return @code{ENOTSUP}. - -@item stackaddr -Provide an address for an application managed stack. The size of the -stack must be at least @code{PTHREAD_STACK_MIN}. - -@item stacksize -Change the size of the stack created for the thread. The value defines -the minimum stack size, in bytes. - -If the value exceeds the system's maximum stack size, or is smaller -than @code{PTHREAD_STACK_MIN}, @code{pthread_attr_setstacksize} will -fail and return @code{EINVAL}. - -@item stack -Provide both the address and size of an application managed stack to -use for the new thread. The base of the memory area is @var{stackaddr} -with the size of the memory area, @var{stacksize}, measured in bytes. - -If the value of @var{stacksize} is less than @code{PTHREAD_STACK_MIN}, -or greater than the system's maximum stack size, or if the value of -@var{stackaddr} lacks the proper alignment, @code{pthread_attr_setstack} -will fail and return @code{EINVAL}. - -@item guardsize -Change the minimum size in bytes of the guard area for the thread's -stack. The default size is a single page. If this value is set, it -will be rounded up to the nearest page size. If the value is set to 0, -a guard area will not be created for this thread. The space allocated -for the guard area is used to catch stack overflow. Therefore, when -allocating large structures on the stack, a larger guard area may be -required to catch a stack overflow. - -If the caller is managing their own stacks (if the @code{stackaddr} -attribute has been set), then the @code{guardsize} attribute is ignored. - -If the value exceeds the @code{stacksize}, @code{pthread_atrr_setguardsize} -will fail and return @code{EINVAL}. -@end table - -@node Cancellation -@section Cancellation - -Cancellation is the mechanism by which a thread can terminate the -execution of another thread. More precisely, a thread can send a -cancellation request to another thread. Depending on its settings, the -target thread can then either ignore the request, honor it immediately, -or defer it till it reaches a cancellation point. When threads are -first created by @code{pthread_create}, they always defer cancellation -requests. - -When a thread eventually honors a cancellation request, it behaves as if -@code{pthread_exit(PTHREAD_CANCELED)} was called. All cleanup handlers -are executed in reverse order, finalization functions for -thread-specific data are called, and finally the thread stops executing. -If the canceled thread was joinable, the return value -@code{PTHREAD_CANCELED} is provided to whichever thread calls -@var{pthread_join} on it. See @code{pthread_exit} for more information. - -Cancellation points are the points where the thread checks for pending -cancellation requests and performs them. The POSIX threads functions -@code{pthread_join}, @code{pthread_cond_wait}, -@code{pthread_cond_timedwait}, @code{pthread_testcancel}, -@code{sem_wait}, and @code{sigwait} are cancellation points. In -addition, these system calls are cancellation points: - -@multitable @columnfractions .33 .33 .33 -@item @t{accept} @tab @t{open} @tab @t{sendmsg} -@item @t{close} @tab @t{pause} @tab @t{sendto} -@item @t{connect} @tab @t{read} @tab @t{system} -@item @t{fcntl} @tab @t{recv} @tab @t{tcdrain} -@item @t{fsync} @tab @t{recvfrom} @tab @t{wait} -@item @t{lseek} @tab @t{recvmsg} @tab @t{waitpid} -@item @t{msync} @tab @t{send} @tab @t{write} -@item @t{nanosleep} -@end multitable - -@noindent -All library functions that call these functions (such as -@code{printf}) are also cancellation points. - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_setcancelstate (int @var{state}, int *@var{oldstate}) -@code{pthread_setcancelstate} changes the cancellation state for the -calling thread -- that is, whether cancellation requests are ignored or -not. The @var{state} argument is the new cancellation state: either -@code{PTHREAD_CANCEL_ENABLE} to enable cancellation, or -@code{PTHREAD_CANCEL_DISABLE} to disable cancellation (cancellation -requests are ignored). - -If @var{oldstate} is not @code{NULL}, the previous cancellation state is -stored in the location pointed to by @var{oldstate}, and can thus be -restored later by another call to @code{pthread_setcancelstate}. - -If the @var{state} argument is not @code{PTHREAD_CANCEL_ENABLE} or -@code{PTHREAD_CANCEL_DISABLE}, @code{pthread_setcancelstate} fails and -returns @code{EINVAL}. Otherwise it returns 0. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_setcanceltype (int @var{type}, int *@var{oldtype}) -@code{pthread_setcanceltype} changes the type of responses to -cancellation requests for the calling thread: asynchronous (immediate) -or deferred. The @var{type} argument is the new cancellation type: -either @code{PTHREAD_CANCEL_ASYNCHRONOUS} to cancel the calling thread -as soon as the cancellation request is received, or -@code{PTHREAD_CANCEL_DEFERRED} to keep the cancellation request pending -until the next cancellation point. If @var{oldtype} is not @code{NULL}, -the previous cancellation state is stored in the location pointed to by -@var{oldtype}, and can thus be restored later by another call to -@code{pthread_setcanceltype}. - -If the @var{type} argument is not @code{PTHREAD_CANCEL_DEFERRED} or -@code{PTHREAD_CANCEL_ASYNCHRONOUS}, @code{pthread_setcanceltype} fails -and returns @code{EINVAL}. Otherwise it returns 0. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun void pthread_testcancel (@var{void}) -@code{pthread_testcancel} does nothing except testing for pending -cancellation and executing it. Its purpose is to introduce explicit -checks for cancellation in long sequences of code that do not call -cancellation point functions otherwise. -@end deftypefun - -@node Cleanup Handlers -@section Cleanup Handlers - -Cleanup handlers are functions that get called when a thread terminates, -either by calling @code{pthread_exit} or because of -cancellation. Cleanup handlers are installed and removed following a -stack-like discipline. - -The purpose of cleanup handlers is to free the resources that a thread -may hold at the time it terminates. In particular, if a thread exits or -is canceled while it owns a locked mutex, the mutex will remain locked -forever and prevent other threads from executing normally. The best way -to avoid this is, just before locking the mutex, to install a cleanup -handler whose effect is to unlock the mutex. Cleanup handlers can be -used similarly to free blocks allocated with @code{malloc} or close file -descriptors on thread termination. - -Here is how to lock a mutex @var{mut} in such a way that it will be -unlocked if the thread is canceled while @var{mut} is locked: - -@smallexample -pthread_cleanup_push(pthread_mutex_unlock, (void *) &mut); -pthread_mutex_lock(&mut); -/* do some work */ -pthread_mutex_unlock(&mut); -pthread_cleanup_pop(0); -@end smallexample - -Equivalently, the last two lines can be replaced by - -@smallexample -pthread_cleanup_pop(1); -@end smallexample - -Notice that the code above is safe only in deferred cancellation mode -(see @code{pthread_setcanceltype}). In asynchronous cancellation mode, a -cancellation can occur between @code{pthread_cleanup_push} and -@code{pthread_mutex_lock}, or between @code{pthread_mutex_unlock} and -@code{pthread_cleanup_pop}, resulting in both cases in the thread trying -to unlock a mutex not locked by the current thread. This is the main -reason why asynchronous cancellation is difficult to use. - -If the code above must also work in asynchronous cancellation mode, -then it must switch to deferred mode for locking and unlocking the -mutex: - -@smallexample -pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, &oldtype); -pthread_cleanup_push(pthread_mutex_unlock, (void *) &mut); -pthread_mutex_lock(&mut); -/* do some work */ -pthread_cleanup_pop(1); -pthread_setcanceltype(oldtype, NULL); -@end smallexample - -The code above can be rewritten in a more compact and efficient way, -using the non-portable functions @code{pthread_cleanup_push_defer_np} -and @code{pthread_cleanup_pop_restore_np}: - -@smallexample -pthread_cleanup_push_defer_np(pthread_mutex_unlock, (void *) &mut); -pthread_mutex_lock(&mut); -/* do some work */ -pthread_cleanup_pop_restore_np(1); -@end smallexample - -@comment pthread.h -@comment POSIX -@deftypefun void pthread_cleanup_push (void (*@var{routine}) (void *), void *@var{arg}) - -@code{pthread_cleanup_push} installs the @var{routine} function with -argument @var{arg} as a cleanup handler. From this point on to the -matching @code{pthread_cleanup_pop}, the function @var{routine} will be -called with arguments @var{arg} when the thread terminates, either -through @code{pthread_exit} or by cancellation. If several cleanup -handlers are active at that point, they are called in LIFO order: the -most recently installed handler is called first. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun void pthread_cleanup_pop (int @var{execute}) -@code{pthread_cleanup_pop} removes the most recently installed cleanup -handler. If the @var{execute} argument is not 0, it also executes the -handler, by calling the @var{routine} function with arguments -@var{arg}. If the @var{execute} argument is 0, the handler is only -removed but not executed. -@end deftypefun - -Matching pairs of @code{pthread_cleanup_push} and -@code{pthread_cleanup_pop} must occur in the same function, at the same -level of block nesting. Actually, @code{pthread_cleanup_push} and -@code{pthread_cleanup_pop} are macros, and the expansion of -@code{pthread_cleanup_push} introduces an open brace @code{@{} with the -matching closing brace @code{@}} being introduced by the expansion of the -matching @code{pthread_cleanup_pop}. - -@comment pthread.h -@comment GNU -@deftypefun void pthread_cleanup_push_defer_np (void (*@var{routine}) (void *), void *@var{arg}) -@code{pthread_cleanup_push_defer_np} is a non-portable extension that -combines @code{pthread_cleanup_push} and @code{pthread_setcanceltype}. -It pushes a cleanup handler just as @code{pthread_cleanup_push} does, -but also saves the current cancellation type and sets it to deferred -cancellation. This ensures that the cleanup mechanism is effective even -if the thread was initially in asynchronous cancellation mode. -@end deftypefun - -@comment pthread.h -@comment GNU -@deftypefun void pthread_cleanup_pop_restore_np (int @var{execute}) -@code{pthread_cleanup_pop_restore_np} pops a cleanup handler introduced -by @code{pthread_cleanup_push_defer_np}, and restores the cancellation -type to its value at the time @code{pthread_cleanup_push_defer_np} was -called. -@end deftypefun - -@code{pthread_cleanup_push_defer_np} and -@code{pthread_cleanup_pop_restore_np} must occur in matching pairs, at -the same level of block nesting. - -The sequence - -@smallexample -pthread_cleanup_push_defer_np(routine, arg); -... -pthread_cleanup_pop_defer_np(execute); -@end smallexample - -@noindent -is functionally equivalent to (but more compact and efficient than) - -@smallexample -@{ - int oldtype; - pthread_setcanceltype(PTHREAD_CANCEL_DEFERRED, &oldtype); - pthread_cleanup_push(routine, arg); - ... - pthread_cleanup_pop(execute); - pthread_setcanceltype(oldtype, NULL); -@} -@end smallexample - - -@node Mutexes -@section Mutexes - -A mutex is a MUTual EXclusion device, and is useful for protecting -shared data structures from concurrent modifications, and implementing -critical sections and monitors. - -A mutex has two possible states: unlocked (not owned by any thread), -and locked (owned by one thread). A mutex can never be owned by two -different threads simultaneously. A thread attempting to lock a mutex -that is already locked by another thread is suspended until the owning -thread unlocks the mutex first. - -None of the mutex functions is a cancellation point, not even -@code{pthread_mutex_lock}, in spite of the fact that it can suspend a -thread for arbitrary durations. This way, the status of mutexes at -cancellation points is predictable, allowing cancellation handlers to -unlock precisely those mutexes that need to be unlocked before the -thread stops executing. Consequently, threads using deferred -cancellation should never hold a mutex for extended periods of time. - -It is not safe to call mutex functions from a signal handler. In -particular, calling @code{pthread_mutex_lock} or -@code{pthread_mutex_unlock} from a signal handler may deadlock the -calling thread. - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_mutex_init (pthread_mutex_t *@var{mutex}, const pthread_mutexattr_t *@var{mutexattr}) - -@code{pthread_mutex_init} initializes the mutex object pointed to by -@var{mutex} according to the mutex attributes specified in @var{mutexattr}. -If @var{mutexattr} is @code{NULL}, default attributes are used instead. - -The LinuxThreads implementation supports only one mutex attribute, -the @var{mutex type}, which is either ``fast'', ``recursive'', or -``error checking''. The type of a mutex determines whether -it can be locked again by a thread that already owns it. -The default type is ``fast''. - -Variables of type @code{pthread_mutex_t} can also be initialized -statically, using the constants @code{PTHREAD_MUTEX_INITIALIZER} (for -timed mutexes), @code{PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP} (for -recursive mutexes), @code{PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP} -(for fast mutexes(, and @code{PTHREAD_ERRORCHECK_MUTEX_INITIALIZER_NP} -(for error checking mutexes). - -@code{pthread_mutex_init} always returns 0. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_mutex_lock (pthread_mutex_t *mutex)) -@code{pthread_mutex_lock} locks the given mutex. If the mutex is -currently unlocked, it becomes locked and owned by the calling thread, -and @code{pthread_mutex_lock} returns immediately. If the mutex is -already locked by another thread, @code{pthread_mutex_lock} suspends the -calling thread until the mutex is unlocked. - -If the mutex is already locked by the calling thread, the behavior of -@code{pthread_mutex_lock} depends on the type of the mutex. If the mutex -is of the ``fast'' type, the calling thread is suspended. It will -remain suspended forever, because no other thread can unlock the mutex. -If the mutex is of the ``error checking'' type, @code{pthread_mutex_lock} -returns immediately with the error code @code{EDEADLK}. If the mutex is -of the ``recursive'' type, @code{pthread_mutex_lock} succeeds and -returns immediately, recording the number of times the calling thread -has locked the mutex. An equal number of @code{pthread_mutex_unlock} -operations must be performed before the mutex returns to the unlocked -state. -@c This doesn't discuss PTHREAD_MUTEX_TIMED_NP mutex attributes. FIXME -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_mutex_trylock (pthread_mutex_t *@var{mutex}) -@code{pthread_mutex_trylock} behaves identically to -@code{pthread_mutex_lock}, except that it does not block the calling -thread if the mutex is already locked by another thread (or by the -calling thread in the case of a ``fast'' mutex). Instead, -@code{pthread_mutex_trylock} returns immediately with the error code -@code{EBUSY}. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_mutex_timedlock (pthread_mutex_t *@var{mutex}, const struct timespec *@var{abstime}) -The @code{pthread_mutex_timedlock} is similar to the -@code{pthread_mutex_lock} function but instead of blocking for in -indefinite time if the mutex is locked by another thread, it returns -when the time specified in @var{abstime} is reached. - -This function can only be used on standard (``timed'') and ``error -checking'' mutexes. It behaves just like @code{pthread_mutex_lock} for -all other types. - -If the mutex is successfully locked, the function returns zero. If the -time specified in @var{abstime} is reached without the mutex being locked, -@code{ETIMEDOUT} is returned. - -This function was introduced in the POSIX.1d revision of the POSIX standard. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_mutex_unlock (pthread_mutex_t *@var{mutex}) -@code{pthread_mutex_unlock} unlocks the given mutex. The mutex is -assumed to be locked and owned by the calling thread on entrance to -@code{pthread_mutex_unlock}. If the mutex is of the ``fast'' type, -@code{pthread_mutex_unlock} always returns it to the unlocked state. If -it is of the ``recursive'' type, it decrements the locking count of the -mutex (number of @code{pthread_mutex_lock} operations performed on it by -the calling thread), and only when this count reaches zero is the mutex -actually unlocked. - -On ``error checking'' mutexes, @code{pthread_mutex_unlock} actually -checks at run-time that the mutex is locked on entrance, and that it was -locked by the same thread that is now calling -@code{pthread_mutex_unlock}. If these conditions are not met, -@code{pthread_mutex_unlock} returns @code{EPERM}, and the mutex remains -unchanged. ``Fast'' and ``recursive'' mutexes perform no such checks, -thus allowing a locked mutex to be unlocked by a thread other than its -owner. This is non-portable behavior and must not be relied upon. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_mutex_destroy (pthread_mutex_t *@var{mutex}) -@code{pthread_mutex_destroy} destroys a mutex object, freeing the -resources it might hold. The mutex must be unlocked on entrance. In the -LinuxThreads implementation, no resources are associated with mutex -objects, thus @code{pthread_mutex_destroy} actually does nothing except -checking that the mutex is unlocked. - -If the mutex is locked by some thread, @code{pthread_mutex_destroy} -returns @code{EBUSY}. Otherwise it returns 0. -@end deftypefun - -If any of the above functions (except @code{pthread_mutex_init}) -is applied to an uninitialized mutex, they will simply return -@code{EINVAL} and do nothing. - -A shared global variable @var{x} can be protected by a mutex as follows: - -@smallexample -int x; -pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER; -@end smallexample - -All accesses and modifications to @var{x} should be bracketed by calls to -@code{pthread_mutex_lock} and @code{pthread_mutex_unlock} as follows: - -@smallexample -pthread_mutex_lock(&mut); -/* operate on x */ -pthread_mutex_unlock(&mut); -@end smallexample - -Mutex attributes can be specified at mutex creation time, by passing a -mutex attribute object as second argument to @code{pthread_mutex_init}. -Passing @code{NULL} is equivalent to passing a mutex attribute object -with all attributes set to their default values. - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_mutexattr_init (pthread_mutexattr_t *@var{attr}) -@code{pthread_mutexattr_init} initializes the mutex attribute object -@var{attr} and fills it with default values for the attributes. - -This function always returns 0. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_mutexattr_destroy (pthread_mutexattr_t *@var{attr}) -@code{pthread_mutexattr_destroy} destroys a mutex attribute object, -which must not be reused until it is -reinitialized. @code{pthread_mutexattr_destroy} does nothing in the -LinuxThreads implementation. - -This function always returns 0. -@end deftypefun - -LinuxThreads supports only one mutex attribute: the mutex type, which is -either @code{PTHREAD_MUTEX_ADAPTIVE_NP} for ``fast'' mutexes, -@code{PTHREAD_MUTEX_RECURSIVE_NP} for ``recursive'' mutexes, -@code{PTHREAD_MUTEX_TIMED_NP} for ``timed'' mutexes, or -@code{PTHREAD_MUTEX_ERRORCHECK_NP} for ``error checking'' mutexes. As -the @code{NP} suffix indicates, this is a non-portable extension to the -POSIX standard and should not be employed in portable programs. - -The mutex type determines what happens if a thread attempts to lock a -mutex it already owns with @code{pthread_mutex_lock}. If the mutex is of -the ``fast'' type, @code{pthread_mutex_lock} simply suspends the calling -thread forever. If the mutex is of the ``error checking'' type, -@code{pthread_mutex_lock} returns immediately with the error code -@code{EDEADLK}. If the mutex is of the ``recursive'' type, the call to -@code{pthread_mutex_lock} returns immediately with a success return -code. The number of times the thread owning the mutex has locked it is -recorded in the mutex. The owning thread must call -@code{pthread_mutex_unlock} the same number of times before the mutex -returns to the unlocked state. - -The default mutex type is ``timed'', that is, @code{PTHREAD_MUTEX_TIMED_NP}. -@c This doesn't describe how a ``timed'' mutex behaves. FIXME - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_mutexattr_settype (pthread_mutexattr_t *@var{attr}, int @var{type}) -@code{pthread_mutexattr_settype} sets the mutex type attribute in -@var{attr} to the value specified by @var{type}. - -If @var{type} is not @code{PTHREAD_MUTEX_ADAPTIVE_NP}, -@code{PTHREAD_MUTEX_RECURSIVE_NP}, @code{PTHREAD_MUTEX_TIMED_NP}, or -@code{PTHREAD_MUTEX_ERRORCHECK_NP}, this function will return -@code{EINVAL} and leave @var{attr} unchanged. - -The standard Unix98 identifiers @code{PTHREAD_MUTEX_DEFAULT}, -@code{PTHREAD_MUTEX_NORMAL}, @code{PTHREAD_MUTEX_RECURSIVE}, -and @code{PTHREAD_MUTEX_ERRORCHECK} are also permitted. - -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_mutexattr_gettype (const pthread_mutexattr_t *@var{attr}, int *@var{type}) -@code{pthread_mutexattr_gettype} retrieves the current value of the -mutex type attribute in @var{attr} and stores it in the location pointed -to by @var{type}. - -This function always returns 0. -@end deftypefun - -@node Condition Variables -@section Condition Variables - -A condition (short for ``condition variable'') is a synchronization -device that allows threads to suspend execution until some predicate on -shared data is satisfied. The basic operations on conditions are: signal -the condition (when the predicate becomes true), and wait for the -condition, suspending the thread execution until another thread signals -the condition. - -A condition variable must always be associated with a mutex, to avoid -the race condition where a thread prepares to wait on a condition -variable and another thread signals the condition just before the first -thread actually waits on it. - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_cond_init (pthread_cond_t *@var{cond}, pthread_condattr_t *cond_@var{attr}) - -@code{pthread_cond_init} initializes the condition variable @var{cond}, -using the condition attributes specified in @var{cond_attr}, or default -attributes if @var{cond_attr} is @code{NULL}. The LinuxThreads -implementation supports no attributes for conditions, hence the -@var{cond_attr} parameter is actually ignored. - -Variables of type @code{pthread_cond_t} can also be initialized -statically, using the constant @code{PTHREAD_COND_INITIALIZER}. - -This function always returns 0. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_cond_signal (pthread_cond_t *@var{cond}) -@code{pthread_cond_signal} restarts one of the threads that are waiting -on the condition variable @var{cond}. If no threads are waiting on -@var{cond}, nothing happens. If several threads are waiting on -@var{cond}, exactly one is restarted, but it is not specified which. - -This function always returns 0. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_cond_broadcast (pthread_cond_t *@var{cond}) -@code{pthread_cond_broadcast} restarts all the threads that are waiting -on the condition variable @var{cond}. Nothing happens if no threads are -waiting on @var{cond}. - -This function always returns 0. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_cond_wait (pthread_cond_t *@var{cond}, pthread_mutex_t *@var{mutex}) -@code{pthread_cond_wait} atomically unlocks the @var{mutex} (as per -@code{pthread_unlock_mutex}) and waits for the condition variable -@var{cond} to be signaled. The thread execution is suspended and does -not consume any CPU time until the condition variable is signaled. The -@var{mutex} must be locked by the calling thread on entrance to -@code{pthread_cond_wait}. Before returning to the calling thread, -@code{pthread_cond_wait} re-acquires @var{mutex} (as per -@code{pthread_lock_mutex}). - -Unlocking the mutex and suspending on the condition variable is done -atomically. Thus, if all threads always acquire the mutex before -signaling the condition, this guarantees that the condition cannot be -signaled (and thus ignored) between the time a thread locks the mutex -and the time it waits on the condition variable. - -This function always returns 0. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_cond_timedwait (pthread_cond_t *@var{cond}, pthread_mutex_t *@var{mutex}, const struct timespec *@var{abstime}) -@code{pthread_cond_timedwait} atomically unlocks @var{mutex} and waits -on @var{cond}, as @code{pthread_cond_wait} does, but it also bounds the -duration of the wait. If @var{cond} has not been signaled before time -@var{abstime}, the mutex @var{mutex} is re-acquired and -@code{pthread_cond_timedwait} returns the error code @code{ETIMEDOUT}. -The wait can also be interrupted by a signal; in that case -@code{pthread_cond_timedwait} returns @code{EINTR}. - -The @var{abstime} parameter specifies an absolute time, with the same -origin as @code{time} and @code{gettimeofday}: an @var{abstime} of 0 -corresponds to 00:00:00 GMT, January 1, 1970. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_cond_destroy (pthread_cond_t *@var{cond}) -@code{pthread_cond_destroy} destroys the condition variable @var{cond}, -freeing the resources it might hold. If any threads are waiting on the -condition variable, @code{pthread_cond_destroy} leaves @var{cond} -untouched and returns @code{EBUSY}. Otherwise it returns 0, and -@var{cond} must not be used again until it is reinitialized. - -In the LinuxThreads implementation, no resources are associated with -condition variables, so @code{pthread_cond_destroy} actually does -nothing. -@end deftypefun - -@code{pthread_cond_wait} and @code{pthread_cond_timedwait} are -cancellation points. If a thread is canceled while suspended in one of -these functions, the thread immediately resumes execution, relocks the -mutex specified by @var{mutex}, and finally executes the cancellation. -Consequently, cleanup handlers are assured that @var{mutex} is locked -when they are called. - -It is not safe to call the condition variable functions from a signal -handler. In particular, calling @code{pthread_cond_signal} or -@code{pthread_cond_broadcast} from a signal handler may deadlock the -calling thread. - -Consider two shared variables @var{x} and @var{y}, protected by the -mutex @var{mut}, and a condition variable @var{cond} that is to be -signaled whenever @var{x} becomes greater than @var{y}. - -@smallexample -int x,y; -pthread_mutex_t mut = PTHREAD_MUTEX_INITIALIZER; -pthread_cond_t cond = PTHREAD_COND_INITIALIZER; -@end smallexample - -Waiting until @var{x} is greater than @var{y} is performed as follows: - -@smallexample -pthread_mutex_lock(&mut); -while (x <= y) @{ - pthread_cond_wait(&cond, &mut); -@} -/* operate on x and y */ -pthread_mutex_unlock(&mut); -@end smallexample - -Modifications on @var{x} and @var{y} that may cause @var{x} to become greater than -@var{y} should signal the condition if needed: - -@smallexample -pthread_mutex_lock(&mut); -/* modify x and y */ -if (x > y) pthread_cond_broadcast(&cond); -pthread_mutex_unlock(&mut); -@end smallexample - -If it can be proved that at most one waiting thread needs to be waken -up (for instance, if there are only two threads communicating through -@var{x} and @var{y}), @code{pthread_cond_signal} can be used as a slightly more -efficient alternative to @code{pthread_cond_broadcast}. In doubt, use -@code{pthread_cond_broadcast}. - -To wait for @var{x} to becomes greater than @var{y} with a timeout of 5 -seconds, do: - -@smallexample -struct timeval now; -struct timespec timeout; -int retcode; - -pthread_mutex_lock(&mut); -gettimeofday(&now); -timeout.tv_sec = now.tv_sec + 5; -timeout.tv_nsec = now.tv_usec * 1000; -retcode = 0; -while (x <= y && retcode != ETIMEDOUT) @{ - retcode = pthread_cond_timedwait(&cond, &mut, &timeout); -@} -if (retcode == ETIMEDOUT) @{ - /* timeout occurred */ -@} else @{ - /* operate on x and y */ -@} -pthread_mutex_unlock(&mut); -@end smallexample - -Condition attributes can be specified at condition creation time, by -passing a condition attribute object as second argument to -@code{pthread_cond_init}. Passing @code{NULL} is equivalent to passing -a condition attribute object with all attributes set to their default -values. - -The LinuxThreads implementation supports no attributes for -conditions. The functions on condition attributes are included only for -compliance with the POSIX standard. - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_condattr_init (pthread_condattr_t *@var{attr}) -@deftypefunx int pthread_condattr_destroy (pthread_condattr_t *@var{attr}) -@code{pthread_condattr_init} initializes the condition attribute object -@var{attr} and fills it with default values for the attributes. -@code{pthread_condattr_destroy} destroys the condition attribute object -@var{attr}. - -Both functions do nothing in the LinuxThreads implementation. - -@code{pthread_condattr_init} and @code{pthread_condattr_destroy} always -return 0. -@end deftypefun - -@node POSIX Semaphores -@section POSIX Semaphores - -@vindex SEM_VALUE_MAX -Semaphores are counters for resources shared between threads. The -basic operations on semaphores are: increment the counter atomically, -and wait until the counter is non-null and decrement it atomically. - -Semaphores have a maximum value past which they cannot be incremented. -The macro @code{SEM_VALUE_MAX} is defined to be this maximum value. In -the GNU C library, @code{SEM_VALUE_MAX} is equal to @code{INT_MAX} -(@pxref{Range of Type}), but it may be much smaller on other systems. - -The pthreads library implements POSIX 1003.1b semaphores. These should -not be confused with System V semaphores (@code{ipc}, @code{semctl} and -@code{semop}). -@c !!! SysV IPC is not doc'd at all in our manual - -All the semaphore functions and macros are defined in @file{semaphore.h}. - -@comment semaphore.h -@comment POSIX -@deftypefun int sem_init (sem_t *@var{sem}, int @var{pshared}, unsigned int @var{value}) -@code{sem_init} initializes the semaphore object pointed to by -@var{sem}. The count associated with the semaphore is set initially to -@var{value}. The @var{pshared} argument indicates whether the semaphore -is local to the current process (@var{pshared} is zero) or is to be -shared between several processes (@var{pshared} is not zero). - -On success @code{sem_init} returns 0. On failure it returns -1 and sets -@var{errno} to one of the following values: - -@table @code -@item EINVAL -@var{value} exceeds the maximal counter value @code{SEM_VALUE_MAX} - -@item ENOSYS -@var{pshared} is not zero. LinuxThreads currently does not support -process-shared semaphores. (This will eventually change.) -@end table -@end deftypefun - -@comment semaphore.h -@comment POSIX -@deftypefun int sem_destroy (sem_t * @var{sem}) -@code{sem_destroy} destroys a semaphore object, freeing the resources it -might hold. If any threads are waiting on the semaphore when -@code{sem_destroy} is called, it fails and sets @var{errno} to -@code{EBUSY}. - -In the LinuxThreads implementation, no resources are associated with -semaphore objects, thus @code{sem_destroy} actually does nothing except -checking that no thread is waiting on the semaphore. This will change -when process-shared semaphores are implemented. -@end deftypefun - -@comment semaphore.h -@comment POSIX -@deftypefun int sem_wait (sem_t * @var{sem}) -@code{sem_wait} suspends the calling thread until the semaphore pointed -to by @var{sem} has non-zero count. It then atomically decreases the -semaphore count. - -@code{sem_wait} is a cancellation point. It always returns 0. -@end deftypefun - -@comment semaphore.h -@comment POSIX -@deftypefun int sem_trywait (sem_t * @var{sem}) -@code{sem_trywait} is a non-blocking variant of @code{sem_wait}. If the -semaphore pointed to by @var{sem} has non-zero count, the count is -atomically decreased and @code{sem_trywait} immediately returns 0. If -the semaphore count is zero, @code{sem_trywait} immediately returns -1 -and sets errno to @code{EAGAIN}. -@end deftypefun - -@comment semaphore.h -@comment POSIX -@deftypefun int sem_post (sem_t * @var{sem}) -@code{sem_post} atomically increases the count of the semaphore pointed to -by @var{sem}. This function never blocks. - -@c !!! This para appears not to agree with the code. -On processors supporting atomic compare-and-swap (Intel 486, Pentium and -later, Alpha, PowerPC, MIPS II, Motorola 68k, Ultrasparc), the -@code{sem_post} function is can safely be called from signal handlers. -This is the only thread synchronization function provided by POSIX -threads that is async-signal safe. On the Intel 386 and earlier Sparc -chips, the current LinuxThreads implementation of @code{sem_post} is not -async-signal safe, because the hardware does not support the required -atomic operations. - -@code{sem_post} always succeeds and returns 0, unless the semaphore -count would exceed @code{SEM_VALUE_MAX} after being incremented. In -that case @code{sem_post} returns -1 and sets @var{errno} to -@code{EINVAL}. The semaphore count is left unchanged. -@end deftypefun - -@comment semaphore.h -@comment POSIX -@deftypefun int sem_getvalue (sem_t * @var{sem}, int * @var{sval}) -@code{sem_getvalue} stores in the location pointed to by @var{sval} the -current count of the semaphore @var{sem}. It always returns 0. -@end deftypefun - -@node Thread-Specific Data -@section Thread-Specific Data - -Programs often need global or static variables that have different -values in different threads. Since threads share one memory space, this -cannot be achieved with regular variables. Thread-specific data is the -POSIX threads answer to this need. - -Each thread possesses a private memory block, the thread-specific data -area, or TSD area for short. This area is indexed by TSD keys. The TSD -area associates values of type @code{void *} to TSD keys. TSD keys are -common to all threads, but the value associated with a given TSD key can -be different in each thread. - -For concreteness, the TSD areas can be viewed as arrays of @code{void *} -pointers, TSD keys as integer indices into these arrays, and the value -of a TSD key as the value of the corresponding array element in the -calling thread. - -When a thread is created, its TSD area initially associates @code{NULL} -with all keys. - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_key_create (pthread_key_t *@var{key}, void (*destr_function) (void *)) -@code{pthread_key_create} allocates a new TSD key. The key is stored in -the location pointed to by @var{key}. There is a limit of -@code{PTHREAD_KEYS_MAX} on the number of keys allocated at a given -time. The value initially associated with the returned key is -@code{NULL} in all currently executing threads. - -The @var{destr_function} argument, if not @code{NULL}, specifies a -destructor function associated with the key. When a thread terminates -via @code{pthread_exit} or by cancellation, @var{destr_function} is -called on the value associated with the key in that thread. The -@var{destr_function} is not called if a key is deleted with -@code{pthread_key_delete} or a value is changed with -@code{pthread_setspecific}. The order in which destructor functions are -called at thread termination time is unspecified. - -Before the destructor function is called, the @code{NULL} value is -associated with the key in the current thread. A destructor function -might, however, re-associate non-@code{NULL} values to that key or some -other key. To deal with this, if after all the destructors have been -called for all non-@code{NULL} values, there are still some -non-@code{NULL} values with associated destructors, then the process is -repeated. The LinuxThreads implementation stops the process after -@code{PTHREAD_DESTRUCTOR_ITERATIONS} iterations, even if some -non-@code{NULL} values with associated descriptors remain. Other -implementations may loop indefinitely. - -@code{pthread_key_create} returns 0 unless @code{PTHREAD_KEYS_MAX} keys -have already been allocated, in which case it fails and returns -@code{EAGAIN}. -@end deftypefun - - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_key_delete (pthread_key_t @var{key}) -@code{pthread_key_delete} deallocates a TSD key. It does not check -whether non-@code{NULL} values are associated with that key in the -currently executing threads, nor call the destructor function associated -with the key. - -If there is no such key @var{key}, it returns @code{EINVAL}. Otherwise -it returns 0. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_setspecific (pthread_key_t @var{key}, const void *@var{pointer}) -@code{pthread_setspecific} changes the value associated with @var{key} -in the calling thread, storing the given @var{pointer} instead. - -If there is no such key @var{key}, it returns @code{EINVAL}. Otherwise -it returns 0. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun {void *} pthread_getspecific (pthread_key_t @var{key}) -@code{pthread_getspecific} returns the value currently associated with -@var{key} in the calling thread. - -If there is no such key @var{key}, it returns @code{NULL}. -@end deftypefun - -The following code fragment allocates a thread-specific array of 100 -characters, with automatic reclaimation at thread exit: - -@smallexample -/* Key for the thread-specific buffer */ -static pthread_key_t buffer_key; - -/* Once-only initialisation of the key */ -static pthread_once_t buffer_key_once = PTHREAD_ONCE_INIT; - -/* Allocate the thread-specific buffer */ -void buffer_alloc(void) -@{ - pthread_once(&buffer_key_once, buffer_key_alloc); - pthread_setspecific(buffer_key, malloc(100)); -@} - -/* Return the thread-specific buffer */ -char * get_buffer(void) -@{ - return (char *) pthread_getspecific(buffer_key); -@} - -/* Allocate the key */ -static void buffer_key_alloc() -@{ - pthread_key_create(&buffer_key, buffer_destroy); -@} - -/* Free the thread-specific buffer */ -static void buffer_destroy(void * buf) -@{ - free(buf); -@} -@end smallexample - -@node Threads and Signal Handling -@section Threads and Signal Handling - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_sigmask (int @var{how}, const sigset_t *@var{newmask}, sigset_t *@var{oldmask}) -@code{pthread_sigmask} changes the signal mask for the calling thread as -described by the @var{how} and @var{newmask} arguments. If @var{oldmask} -is not @code{NULL}, the previous signal mask is stored in the location -pointed to by @var{oldmask}. - -The meaning of the @var{how} and @var{newmask} arguments is the same as -for @code{sigprocmask}. If @var{how} is @code{SIG_SETMASK}, the signal -mask is set to @var{newmask}. If @var{how} is @code{SIG_BLOCK}, the -signals specified to @var{newmask} are added to the current signal mask. -If @var{how} is @code{SIG_UNBLOCK}, the signals specified to -@var{newmask} are removed from the current signal mask. - -Recall that signal masks are set on a per-thread basis, but signal -actions and signal handlers, as set with @code{sigaction}, are shared -between all threads. - -The @code{pthread_sigmask} function returns 0 on success, and one of the -following error codes on error: -@table @code -@item EINVAL -@var{how} is not one of @code{SIG_SETMASK}, @code{SIG_BLOCK}, or @code{SIG_UNBLOCK} - -@item EFAULT -@var{newmask} or @var{oldmask} point to invalid addresses -@end table -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_kill (pthread_t @var{thread}, int @var{signo}) -@code{pthread_kill} sends signal number @var{signo} to the thread -@var{thread}. The signal is delivered and handled as described in -@ref{Signal Handling}. - -@code{pthread_kill} returns 0 on success, one of the following error codes -on error: -@table @code -@item EINVAL -@var{signo} is not a valid signal number - -@item ESRCH -The thread @var{thread} does not exist (e.g. it has already terminated) -@end table -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int sigwait (const sigset_t *@var{set}, int *@var{sig}) -@code{sigwait} suspends the calling thread until one of the signals in -@var{set} is delivered to the calling thread. It then stores the number -of the signal received in the location pointed to by @var{sig} and -returns. The signals in @var{set} must be blocked and not ignored on -entrance to @code{sigwait}. If the delivered signal has a signal handler -function attached, that function is @emph{not} called. - -@code{sigwait} is a cancellation point. It always returns 0. -@end deftypefun - -For @code{sigwait} to work reliably, the signals being waited for must be -blocked in all threads, not only in the calling thread, since -otherwise the POSIX semantics for signal delivery do not guarantee -that it's the thread doing the @code{sigwait} that will receive the signal. -The best way to achieve this is block those signals before any threads -are created, and never unblock them in the program other than by -calling @code{sigwait}. - -Signal handling in LinuxThreads departs significantly from the POSIX -standard. According to the standard, ``asynchronous'' (external) signals -are addressed to the whole process (the collection of all threads), -which then delivers them to one particular thread. The thread that -actually receives the signal is any thread that does not currently block -the signal. - -In LinuxThreads, each thread is actually a kernel process with its own -PID, so external signals are always directed to one particular thread. -If, for instance, another thread is blocked in @code{sigwait} on that -signal, it will not be restarted. - -The LinuxThreads implementation of @code{sigwait} installs dummy signal -handlers for the signals in @var{set} for the duration of the -wait. Since signal handlers are shared between all threads, other -threads must not attach their own signal handlers to these signals, or -alternatively they should all block these signals (which is recommended -anyway). - -@node Threads and Fork -@section Threads and Fork - -It's not intuitively obvious what should happen when a multi-threaded POSIX -process calls @code{fork}. Not only are the semantics tricky, but you may -need to write code that does the right thing at fork time even if that code -doesn't use the @code{fork} function. Moreover, you need to be aware of -interaction between @code{fork} and some library features like -@code{pthread_once} and stdio streams. - -When @code{fork} is called by one of the threads of a process, it creates a new -process which is copy of the calling process. Effectively, in addition to -copying certain system objects, the function takes a snapshot of the memory -areas of the parent process, and creates identical areas in the child. -To make matters more complicated, with threads it's possible for two or more -threads to concurrently call fork to create two or more child processes. - -The child process has a copy of the address space of the parent, but it does -not inherit any of its threads. Execution of the child process is carried out -by a new thread which returns from @code{fork} function with a return value of -zero; it is the only thread in the child process. Because threads are not -inherited across fork, issues arise. At the time of the call to @code{fork}, -threads in the parent process other than the one calling @code{fork} may have -been executing critical regions of code. As a result, the child process may -get a copy of objects that are not in a well-defined state. This potential -problem affects all components of the program. - -Any program component which will continue being used in a child process must -correctly handle its state during @code{fork}. For this purpose, the POSIX -interface provides the special function @code{pthread_atfork} for installing -pointers to handler functions which are called from within @code{fork}. - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_atfork (void (*@var{prepare})(void), void (*@var{parent})(void), void (*@var{child})(void)) - -@code{pthread_atfork} registers handler functions to be called just -before and just after a new process is created with @code{fork}. The -@var{prepare} handler will be called from the parent process, just -before the new process is created. The @var{parent} handler will be -called from the parent process, just before @code{fork} returns. The -@var{child} handler will be called from the child process, just before -@code{fork} returns. - -@code{pthread_atfork} returns 0 on success and a non-zero error code on -error. - -One or more of the three handlers @var{prepare}, @var{parent} and -@var{child} can be given as @code{NULL}, meaning that no handler needs -to be called at the corresponding point. - -@code{pthread_atfork} can be called several times to install several -sets of handlers. At @code{fork} time, the @var{prepare} handlers are -called in LIFO order (last added with @code{pthread_atfork}, first -called before @code{fork}), while the @var{parent} and @var{child} -handlers are called in FIFO order (first added, first called). - -If there is insufficient memory available to register the handlers, -@code{pthread_atfork} fails and returns @code{ENOMEM}. Otherwise it -returns 0. - -The functions @code{fork} and @code{pthread_atfork} must not be regarded as -reentrant from the context of the handlers. That is to say, if a -@code{pthread_atfork} handler invoked from within @code{fork} calls -@code{pthread_atfork} or @code{fork}, the behavior is undefined. - -Registering a triplet of handlers is an atomic operation with respect to fork. -If new handlers are registered at about the same time as a fork occurs, either -all three handlers will be called, or none of them will be called. - -The handlers are inherited by the child process, and there is no -way to remove them, short of using @code{exec} to load a new -pocess image. - -@end deftypefun - -To understand the purpose of @code{pthread_atfork}, recall that -@code{fork} duplicates the whole memory space, including mutexes in -their current locking state, but only the calling thread: other threads -are not running in the child process. Thus, if a mutex is locked by a -thread other than the thread calling @code{fork}, that mutex will remain -locked forever in the child process, possibly blocking the execution of -the child process. Or if some shared data, such as a linked list, was in the -middle of being updated by a thread in the parent process, the child -will get a copy of the incompletely updated data which it cannot use. - -To avoid this, install handlers with @code{pthread_atfork} as follows: have the -@var{prepare} handler lock the mutexes (in locking order), and the -@var{parent} handler unlock the mutexes. The @var{child} handler should reset -the mutexes using @code{pthread_mutex_init}, as well as any other -synchronization objects such as condition variables. - -Locking the global mutexes before the fork ensures that all other threads are -locked out of the critical regions of code protected by those mutexes. Thus -when @code{fork} takes a snapshot of the parent's address space, that snapshot -will copy valid, stable data. Resetting the synchronization objects in the -child process will ensure they are properly cleansed of any artifacts from the -threading subsystem of the parent process. For example, a mutex may inherit -a wait queue of threads waiting for the lock; this wait queue makes no sense -in the child process. Initializing the mutex takes care of this. - -@node Streams and Fork -@section Streams and Fork - -The GNU standard I/O library has an internal mutex which guards the internal -linked list of all standard C FILE objects. This mutex is properly taken care -of during @code{fork} so that the child receives an intact copy of the list. -This allows the @code{fopen} function, and related stream-creating functions, -to work correctly in the child process, since these functions need to insert -into the list. - -However, the individual stream locks are not completely taken care of. Thus -unless the multithreaded application takes special precautions in its use of -@code{fork}, the child process might not be able to safely use the streams that -it inherited from the parent. In general, for any given open stream in the -parent that is to be used by the child process, the application must ensure -that that stream is not in use by another thread when @code{fork} is called. -Otherwise an inconsistent copy of the stream object be produced. An easy way to -ensure this is to use @code{flockfile} to lock the stream prior to calling -@code{fork} and then unlock it with @code{funlockfile} inside the parent -process, provided that the parent's threads properly honor these locks. -Nothing special needs to be done in the child process, since the library -internally resets all stream locks. - -Note that the stream locks are not shared between the parent and child. -For example, even if you ensure that, say, the stream @code{stdout} is properly -treated and can be safely used in the child, the stream locks do not provide -an exclusion mechanism between the parent and child. If both processes write -to @code{stdout}, strangely interleaved output may result regardless of -the explicit use of @code{flockfile} or implicit locks. - -Also note that these provisions are a GNU extension; other systems might not -provide any way for streams to be used in the child of a multithreaded process. -POSIX requires that such a child process confines itself to calling only -asynchronous safe functions, which excludes much of the library, including -standard I/O. - -@node Miscellaneous Thread Functions -@section Miscellaneous Thread Functions - -@comment pthread.h -@comment POSIX -@deftypefun {pthread_t} pthread_self (@var{void}) -@code{pthread_self} returns the thread identifier for the calling thread. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_equal (pthread_t thread1, pthread_t thread2) -@code{pthread_equal} determines if two thread identifiers refer to the same -thread. - -A non-zero value is returned if @var{thread1} and @var{thread2} refer to -the same thread. Otherwise, 0 is returned. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_detach (pthread_t @var{th}) -@code{pthread_detach} puts the thread @var{th} in the detached -state. This guarantees that the memory resources consumed by @var{th} -will be freed immediately when @var{th} terminates. However, this -prevents other threads from synchronizing on the termination of @var{th} -using @code{pthread_join}. - -A thread can be created initially in the detached state, using the -@code{detachstate} attribute to @code{pthread_create}. In contrast, -@code{pthread_detach} applies to threads created in the joinable state, -and which need to be put in the detached state later. - -After @code{pthread_detach} completes, subsequent attempts to perform -@code{pthread_join} on @var{th} will fail. If another thread is already -joining the thread @var{th} at the time @code{pthread_detach} is called, -@code{pthread_detach} does nothing and leaves @var{th} in the joinable -state. - -On success, 0 is returned. On error, one of the following codes is -returned: -@table @code -@item ESRCH -No thread could be found corresponding to that specified by @var{th} -@item EINVAL -The thread @var{th} is already in the detached state -@end table -@end deftypefun - -@comment pthread.h -@comment GNU -@deftypefun void pthread_kill_other_threads_np (@var{void}) -@code{pthread_kill_other_threads_np} is a non-portable LinuxThreads extension. -It causes all threads in the program to terminate immediately, except -the calling thread which proceeds normally. It is intended to be -called just before a thread calls one of the @code{exec} functions, -e.g. @code{execve}. - -Termination of the other threads is not performed through -@code{pthread_cancel} and completely bypasses the cancellation -mechanism. Hence, the current settings for cancellation state and -cancellation type are ignored, and the cleanup handlers are not -executed in the terminated threads. - -According to POSIX 1003.1c, a successful @code{exec*} in one of the -threads should automatically terminate all other threads in the program. -This behavior is not yet implemented in LinuxThreads. Calling -@code{pthread_kill_other_threads_np} before @code{exec*} achieves much -of the same behavior, except that if @code{exec*} ultimately fails, then -all other threads are already killed. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_once (pthread_once_t *once_@var{control}, void (*@var{init_routine}) (void)) - -The purpose of @code{pthread_once} is to ensure that a piece of -initialization code is executed at most once. The @var{once_control} -argument points to a static or extern variable statically initialized -to @code{PTHREAD_ONCE_INIT}. - -The first time @code{pthread_once} is called with a given -@var{once_control} argument, it calls @var{init_routine} with no -argument and changes the value of the @var{once_control} variable to -record that initialization has been performed. Subsequent calls to -@code{pthread_once} with the same @code{once_control} argument do -nothing. - -If a thread is cancelled while executing @var{init_routine} -the state of the @var{once_control} variable is reset so that -a future call to @code{pthread_once} will call the routine again. - -If the process forks while one or more threads are executing -@code{pthread_once} initialization routines, the states of their respective -@var{once_control} variables will appear to be reset in the child process so -that if the child calls @code{pthread_once}, the routines will be executed. - -@code{pthread_once} always returns 0. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_setschedparam (pthread_t target_@var{thread}, int @var{policy}, const struct sched_param *@var{param}) - -@code{pthread_setschedparam} sets the scheduling parameters for the -thread @var{target_thread} as indicated by @var{policy} and -@var{param}. @var{policy} can be either @code{SCHED_OTHER} (regular, -non-realtime scheduling), @code{SCHED_RR} (realtime, round-robin) or -@code{SCHED_FIFO} (realtime, first-in first-out). @var{param} specifies -the scheduling priority for the two realtime policies. See -@code{sched_setpolicy} for more information on scheduling policies. - -The realtime scheduling policies @code{SCHED_RR} and @code{SCHED_FIFO} -are available only to processes with superuser privileges. - -On success, @code{pthread_setschedparam} returns 0. On error it returns -one of the following codes: -@table @code -@item EINVAL -@var{policy} is not one of @code{SCHED_OTHER}, @code{SCHED_RR}, -@code{SCHED_FIFO}, or the priority value specified by @var{param} is not -valid for the specified policy - -@item EPERM -Realtime scheduling was requested but the calling process does not have -sufficient privileges. - -@item ESRCH -The @var{target_thread} is invalid or has already terminated - -@item EFAULT -@var{param} points outside the process memory space -@end table -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_getschedparam (pthread_t target_@var{thread}, int *@var{policy}, struct sched_param *@var{param}) - -@code{pthread_getschedparam} retrieves the scheduling policy and -scheduling parameters for the thread @var{target_thread} and stores them -in the locations pointed to by @var{policy} and @var{param}, -respectively. - -@code{pthread_getschedparam} returns 0 on success, or one of the -following error codes on failure: -@table @code -@item ESRCH -The @var{target_thread} is invalid or has already terminated. - -@item EFAULT -@var{policy} or @var{param} point outside the process memory space. - -@end table -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_setconcurrency (int @var{level}) -@code{pthread_setconcurrency} is unused in LinuxThreads due to the lack -of a mapping of user threads to kernel threads. It exists for source -compatibility. It does store the value @var{level} so that it can be -returned by a subsequent call to @code{pthread_getconcurrency}. It takes -no other action however. -@end deftypefun - -@comment pthread.h -@comment POSIX -@deftypefun int pthread_getconcurrency () -@code{pthread_getconcurrency} is unused in LinuxThreads due to the lack -of a mapping of user threads to kernel threads. It exists for source -compatibility. However, it will return the value that was set by the -last call to @code{pthread_setconcurrency}. -@end deftypefun - diff --git a/newlib/libc/sys/linux/linuxthreads/lockfile.c b/newlib/libc/sys/linux/linuxthreads/lockfile.c deleted file mode 100644 index 0aeb15086..000000000 --- a/newlib/libc/sys/linux/linuxthreads/lockfile.c +++ /dev/null @@ -1,97 +0,0 @@ -/* lockfile - Handle locking and unlocking of stream. - Copyright (C) 1996, 1998, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <sys/lock.h> -#include <stdio.h> -#include <pthread.h> -#include "internals.h" - -#ifdef USE_IN_LIBIO -#include "../libio/libioP.h" -#endif - -#ifndef SHARED -/* We need a hook to force this file to be linked in when static - libpthread is used. */ -const int __pthread_provide_lockfile = 0; -#endif - -void -__flockfile (FILE *stream) -{ - __lock_acquire_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock); -} -#undef _IO_flockfile -strong_alias (__flockfile, _IO_flockfile) -weak_alias (__flockfile, flockfile); - - -void -__funlockfile (FILE *stream) -{ - __lock_release_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock); -} -#undef _IO_funlockfile -strong_alias (__funlockfile, _IO_funlockfile) -weak_alias (__funlockfile, funlockfile); - - -int -__ftrylockfile (FILE *stream) -{ - return __lock_try_acquire_recursive (*(_LOCK_RECURSIVE_T *)&stream->_lock); -} -strong_alias (__ftrylockfile, _IO_ftrylockfile) -weak_alias (__ftrylockfile, ftrylockfile); - -void -__flockfilelist(void) -{ -#ifdef USE_IN_LIBIO - _IO_list_lock(); -#endif -} - -void -__funlockfilelist(void) -{ -#ifdef USE_IN_LIBIO - _IO_list_unlock(); -#endif -} - -void -__fresetlockfiles (void) -{ -#ifdef USE_IN_LIBIO - _IO_ITER i; - - pthread_mutexattr_t attr; - - __pthread_mutexattr_init (&attr); - __pthread_mutexattr_settype (&attr, PTHREAD_MUTEX_RECURSIVE_NP); - - for (i = _IO_iter_begin(); i != _IO_iter_end(); i = _IO_iter_next(i)) - __pthread_mutex_init (_IO_iter_file(i)->_lock, &attr); - - __pthread_mutexattr_destroy (&attr); - - _IO_list_resetlock(); -#endif -} diff --git a/newlib/libc/sys/linux/linuxthreads/machine/Makefile.am b/newlib/libc/sys/linux/linuxthreads/machine/Makefile.am deleted file mode 100644 index 27c348c3b..000000000 --- a/newlib/libc/sys/linux/linuxthreads/machine/Makefile.am +++ /dev/null @@ -1,10 +0,0 @@ -## Process this file with automake to generate Makefile.in - -AUTOMAKE_OPTIONS = cygnus - -SUBDIRS = $(machine_dir) . - -doc: - -ACLOCAL_AMFLAGS = -I ../../../../.. -CONFIG_STATUS_DEPENDENCIES = $(newlib_basedir)/configure.host diff --git a/newlib/libc/sys/linux/linuxthreads/machine/Makefile.in b/newlib/libc/sys/linux/linuxthreads/machine/Makefile.in deleted file mode 100644 index c0b669d41..000000000 --- a/newlib/libc/sys/linux/linuxthreads/machine/Makefile.in +++ /dev/null @@ -1,356 +0,0 @@ -# Makefile.in generated automatically by automake 1.4-p6 from Makefile.am - -# Copyright (C) 1994, 1995-8, 1999, 2001 Free Software Foundation, Inc. -# This Makefile.in is free software; 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Its master source is NOT part of - the C library, however. The master source lives in the GNU MP Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#ifndef _bp_asm_h_ -# define _bp_asm_h_ 1 - -# if __ASSEMBLER__ - -# if __BOUNDED_POINTERS__ - -/* Bounded pointers occupy three words. */ -# define PTR_SIZE 12 -/* Bounded pointer return values are passed back through a hidden - argument that points to caller-allocate space. The hidden arg - occupies one word on the stack. */ -# define RTN_SIZE 4 -/* Although the caller pushes the hidden arg, the callee is - responsible for popping it. */ -# define RET_PTR ret $RTN_SIZE -/* Maintain frame pointer chain in leaf assembler functions for the benefit - of debugging stack traces when bounds violations occur. */ -# define ENTER pushl %ebp; movl %esp, %ebp -# define LEAVE movl %ebp, %esp; popl %ebp -/* Stack space overhead of procedure-call linkage: return address and - frame pointer. */ -# define LINKAGE 8 -/* Stack offset of return address after calling ENTER. */ -# define PCOFF 4 - -/* Int 5 is the "bound range" exception also raised by the "bound" - instruction. */ -# define BOUNDS_VIOLATED int $5 - -# define CHECK_BOUNDS_LOW(VAL_REG, BP_MEM) \ - cmpl 4+BP_MEM, VAL_REG; \ - jae 0f; /* continue if value >= low */ \ - BOUNDS_VIOLATED; \ - 0: - -# define CHECK_BOUNDS_HIGH(VAL_REG, BP_MEM, Jcc) \ - cmpl 8+BP_MEM, VAL_REG; \ - Jcc 0f; /* continue if value < high */ \ - BOUNDS_VIOLATED; \ - 0: - -# define CHECK_BOUNDS_BOTH(VAL_REG, BP_MEM) \ - cmpl 4+BP_MEM, VAL_REG; \ - jb 1f; /* die if value < low */ \ - cmpl 8+BP_MEM, VAL_REG; \ - jb 0f; /* continue if value < high */ \ - 1: BOUNDS_VIOLATED; \ - 0: - -# define CHECK_BOUNDS_BOTH_WIDE(VAL_REG, BP_MEM, LENGTH) \ - CHECK_BOUNDS_LOW(VAL_REG, BP_MEM); \ - addl LENGTH, VAL_REG; \ - cmpl 8+BP_MEM, VAL_REG; \ - jbe 0f; /* continue if value <= high */ \ - BOUNDS_VIOLATED; \ - 0: subl LENGTH, VAL_REG /* restore value */ - -/* Take bounds from BP_MEM and affix them to the pointer - value in %eax, stuffing all into memory at RTN(%esp). - Use %edx as a scratch register. */ - -# define RETURN_BOUNDED_POINTER(BP_MEM) \ - movl RTN(%esp), %edx; \ - movl %eax, 0(%edx); \ - movl 4+BP_MEM, %eax; \ - movl %eax, 4(%edx); \ - movl 8+BP_MEM, %eax; \ - movl %eax, 8(%edx) - -# define RETURN_NULL_BOUNDED_POINTER \ - movl RTN(%esp), %edx; \ - movl %eax, 0(%edx); \ - movl %eax, 4(%edx); \ - movl %eax, 8(%edx) - -/* The caller of __errno_location is responsible for allocating space - for the three-word BP return-value and passing pushing its address - as an implicit first argument. */ -# define PUSH_ERRNO_LOCATION_RETURN \ - subl $8, %esp; \ - subl $4, %esp; \ - pushl %esp - -/* __errno_location is responsible for popping the implicit first - argument, but we must pop the space for the BP itself. We also - dereference the return value in order to dig out the pointer value. */ -# define POP_ERRNO_LOCATION_RETURN \ - popl %eax; \ - addl $8, %esp - -# else /* !__BOUNDED_POINTERS__ */ - -/* Unbounded pointers occupy one word. */ -# define PTR_SIZE 4 -/* Unbounded pointer return values are passed back in the register %eax. */ -# define RTN_SIZE 0 -/* Use simple return instruction for unbounded pointer values. */ -# define RET_PTR ret -/* Don't maintain frame pointer chain for leaf assembler functions. */ -# define ENTER -# define LEAVE -/* Stack space overhead of procedure-call linkage: return address only. */ -# define LINKAGE 4 -/* Stack offset of return address after calling ENTER. */ -# define PCOFF 0 - -# define CHECK_BOUNDS_LOW(VAL_REG, BP_MEM) -# define CHECK_BOUNDS_HIGH(VAL_REG, BP_MEM, Jcc) -# define CHECK_BOUNDS_BOTH(VAL_REG, BP_MEM) -# define CHECK_BOUNDS_BOTH_WIDE(VAL_REG, BP_MEM, LENGTH) -# define RETURN_BOUNDED_POINTER(BP_MEM) - -# define RETURN_NULL_BOUNDED_POINTER - -# define PUSH_ERRNO_LOCATION_RETURN -# define POP_ERRNO_LOCATION_RETURN - -# endif /* !__BOUNDED_POINTERS__ */ - -# endif /* __ASSEMBLER__ */ - -#endif /* _bp_asm_h_ */ diff --git a/newlib/libc/sys/linux/linuxthreads/machine/i386/clone.S b/newlib/libc/sys/linux/linuxthreads/machine/i386/clone.S deleted file mode 100644 index dd00c2fb5..000000000 --- a/newlib/libc/sys/linux/linuxthreads/machine/i386/clone.S +++ /dev/null @@ -1,95 +0,0 @@ -/* Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Richard Henderson (rth@tamu.edu) - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -/* clone() is even more special than fork() as it mucks with stacks - and invokes a function in the right context after its all over. */ - -#include <sysdep.h> -#define _ERRNO_H 1 -#include <bits/errno.h> -#include <asm/unistd.h> -#include <bp-sym.h> -#include <bp-asm.h> - -/* int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); */ - -#define PARMS LINKAGE /* no space for saved regs */ -#define FUNC PARMS -#define STACK FUNC+4 -#define FLAGS STACK+PTR_SIZE -#define ARG FLAGS+4 - - .text -ENTRY (BP_SYM (__clone)) - /* Sanity check arguments. */ - movl $-EINVAL,%eax - movl FUNC(%esp),%ecx /* no NULL function pointers */ -#ifdef PIC - jecxz SYSCALL_ERROR_LABEL -#else - testl %ecx,%ecx - jz SYSCALL_ERROR_LABEL -#endif - movl STACK(%esp),%ecx /* no NULL stack pointers */ -#ifdef PIC - jecxz SYSCALL_ERROR_LABEL -#else - testl %ecx,%ecx - jz SYSCALL_ERROR_LABEL -#endif - - /* Insert the argument onto the new stack. */ - subl $8,%ecx - movl ARG(%esp),%eax /* no negative argument counts */ - movl %eax,4(%ecx) - - /* Save the function pointer as the zeroth argument. - It will be popped off in the child in the ebx frobbing below. */ - movl FUNC(%esp),%eax - movl %eax,0(%ecx) - - /* Do the system call */ - pushl %ebx - movl FLAGS+4(%esp),%ebx - movl $SYS_ify(clone),%eax - int $0x80 - popl %ebx - - test %eax,%eax - jl SYSCALL_ERROR_LABEL - jz thread_start - -L(pseudo_end): - ret - -thread_start: - subl %ebp,%ebp /* terminate the stack frame */ - call *%ebx -#ifdef PIC - call L(here) -L(here): - popl %ebx - addl $_GLOBAL_OFFSET_TABLE_+[.-L(here)], %ebx -#endif - pushl %eax - call JUMPTARGET (_exit) - -PSEUDO_END (BP_SYM (__clone)) - -weak_alias (BP_SYM (__clone), BP_SYM (clone)) diff --git a/newlib/libc/sys/linux/linuxthreads/machine/i386/configure b/newlib/libc/sys/linux/linuxthreads/machine/i386/configure deleted file mode 100755 index 4a9c4be10..000000000 --- a/newlib/libc/sys/linux/linuxthreads/machine/i386/configure +++ /dev/null @@ -1,3343 +0,0 @@ -#! /bin/sh - -# Guess values for system-dependent variables and create Makefiles. -# Generated automatically using autoconf version 2.13 -# Copyright (C) 1992, 93, 94, 95, 96 Free Software Foundation, Inc. -# -# This configure script is free software; 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See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <sysdep.h> -#define _ERRNO_H -#include <bits/errno.h> -#include <bp-asm.h> -#include <bp-sym.h> - -.globl __syscall_error - -__syscall_error: -#if defined (EWOULDBLOCK_sys) && EWOULDBLOCK_sys != EAGAIN - /* We translate the system's EWOULDBLOCK error into EAGAIN. - The GNU C library always defines EWOULDBLOCK==EAGAIN. - EWOULDBLOCK_sys is the original number. */ - cmpl $EWOULDBLOCK_sys, %eax /* Is it the old EWOULDBLOCK? */ - jne notb /* Branch if not. */ - movl $EAGAIN, %eax /* Yes; translate it to EAGAIN. */ -notb: -#endif -#ifndef PIC - pushl %eax - PUSH_ERRNO_LOCATION_RETURN - call BP_SYM (__errno) - POP_ERRNO_LOCATION_RETURN - popl %ecx - movl %ecx, (%eax) -#else - /* The caller has pushed %ebx and then set it up to - point to the GOT before calling us through the PLT. */ - pushl %eax - PUSH_ERRNO_LOCATION_RETURN - call C_SYMBOL_NAME (BP_SYM (__errno)@PLT) - POP_ERRNO_LOCATION_RETURN - popl %ecx - /* Pop %ebx value saved before jumping here. */ - popl %ebx - movl %ecx, (%eax) -#endif - movl $-1, %eax - ret - -#undef __syscall_error -END (__syscall_error) diff --git a/newlib/libc/sys/linux/linuxthreads/machine/i386/i386-sysdep.h b/newlib/libc/sys/linux/linuxthreads/machine/i386/i386-sysdep.h deleted file mode 100644 index 02b4c19af..000000000 --- a/newlib/libc/sys/linux/linuxthreads/machine/i386/i386-sysdep.h +++ /dev/null @@ -1,130 +0,0 @@ -/* Assembler macros for i386. - Copyright (C) 1991, 92, 93, 95, 96, 98 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#define NO_UNDERSCORES - -#include <generic-sysdep.h> - -#ifdef __ASSEMBLER__ - -/* Syntactic details of assembler. */ - -#ifdef HAVE_ELF - -/* ELF uses byte-counts for .align, most others use log2 of count of bytes. */ -#define ALIGNARG(log2) 1<<log2 -/* For ELF we need the `.type' directive to make shared libs work right. */ -#define ASM_TYPE_DIRECTIVE(name,typearg) .type name,typearg; -#define ASM_SIZE_DIRECTIVE(name) .size name,.-name; - -/* In ELF C symbols are asm symbols. */ -#undef NO_UNDERSCORES -#define NO_UNDERSCORES - -#else - -#define ALIGNARG(log2) log2 -#define ASM_TYPE_DIRECTIVE(name,type) /* Nothing is specified. */ -#define ASM_SIZE_DIRECTIVE(name) /* Nothing is specified. */ - -#endif - - -/* Define an entry point visible from C. - - There is currently a bug in gdb which prevents us from specifying - incomplete stabs information. Fake some entries here which specify - the current source file. */ -#define ENTRY(name) \ - STABS_CURRENT_FILE1("") \ - STABS_CURRENT_FILE(name) \ - ASM_GLOBAL_DIRECTIVE C_SYMBOL_NAME(name); \ - ASM_TYPE_DIRECTIVE (C_SYMBOL_NAME(name),@function) \ - .align ALIGNARG(4); \ - STABS_FUN(name) \ - C_LABEL(name) \ - CALL_MCOUNT - -#undef END -#define END(name) \ - ASM_SIZE_DIRECTIVE(name) \ - STABS_FUN_END(name) - -/* Remove the following two lines once the gdb bug is fixed. */ -#define STABS_CURRENT_FILE(name) \ - STABS_CURRENT_FILE1 (#name) -#define STABS_CURRENT_FILE1(name) \ - 1: .stabs name,100,0,0,1b; -/* Emit stabs definition lines. We use F(0,1) and define t(0,1) as `int', - the same way gcc does it. */ -#define STABS_FUN(name) STABS_FUN2(name, name##:F(0,1)) -#define STABS_FUN2(name, namestr) \ - .stabs "int:t(0,1)=r(0,1);-2147483648;2147483647;",128,0,0,0; \ - .stabs #namestr,36,0,0,name; -#define STABS_FUN_END(name) \ - 1: .stabs "",36,0,0,1b-name; - -/* If compiled for profiling, call `mcount' at the start of each function. */ -#ifdef PROF -/* The mcount code relies on a normal frame pointer being on the stack - to locate our caller, so push one just for its benefit. */ -#define CALL_MCOUNT \ - pushl %ebp; movl %esp, %ebp; call JUMPTARGET(mcount); popl %ebp; -#else -#define CALL_MCOUNT /* Do nothing. */ -#endif - -#ifdef NO_UNDERSCORES -/* Since C identifiers are not normally prefixed with an underscore - on this system, the asm identifier `syscall_error' intrudes on the - C name space. Make sure we use an innocuous name. */ -#define syscall_error __syscall_error -#define mcount _mcount -#endif - -#define PSEUDO(name, syscall_name, args) \ -lose: SYSCALL_PIC_SETUP \ - jmp JUMPTARGET(syscall_error) \ - .globl syscall_error; \ - ENTRY (name) \ - DO_CALL (syscall_name, args); \ - jb lose - -#undef PSEUDO_END -#define PSEUDO_END(name) \ - END (name) - -#ifdef PIC -#define JUMPTARGET(name) name##@PLT -#define SYSCALL_PIC_SETUP \ - pushl %ebx; \ - call 0f; \ -0: popl %ebx; \ - addl $_GLOBAL_OFFSET_TABLE+[.-0b], %ebx; -#else -#define JUMPTARGET(name) name -#define SYSCALL_PIC_SETUP /* Nothing. */ -#endif - -/* Local label name for asm code. */ -#ifndef L -#define L(name) name -#endif - -#endif /* __ASSEMBLER__ */ diff --git a/newlib/libc/sys/linux/linuxthreads/machine/i386/pspinlock.c b/newlib/libc/sys/linux/linuxthreads/machine/i386/pspinlock.c deleted file mode 100644 index 5d242388a..000000000 --- a/newlib/libc/sys/linux/linuxthreads/machine/i386/pspinlock.c +++ /dev/null @@ -1,97 +0,0 @@ -/* POSIX spinlock implementation. x86 version. - Copyright (C) 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <errno.h> -#include <pthread.h> -#include "internals.h" - -/* This implementation is similar to the one used in the Linux kernel. - But the kernel is byte instructions for the memory access. This is - faster but unusable here. The problem is that only 128 - threads/processes could use the spinlock at the same time. If (by - a design error in the program) a thread/process would hold the - spinlock for a time long enough to accumulate 128 waiting - processes, the next one will find a positive value in the spinlock - and assume it is unlocked. We cannot accept that. */ - -int -__pthread_spin_lock (pthread_spinlock_t *lock) -{ - asm volatile - ("\n" - "1:\n\t" - "lock; decl %0\n\t" - "js 2f\n\t" - ".section .text.spinlock,\"ax\"\n" - "2:\n\t" - "cmpl $0,%0\n\t" - "rep; nop\n\t" - "jle 2b\n\t" - "jmp 1b\n\t" - ".previous" - : "=m" (*lock)); - return 0; -} -weak_alias (__pthread_spin_lock, pthread_spin_lock) - - -int -__pthread_spin_trylock (pthread_spinlock_t *lock) -{ - int oldval; - - asm volatile - ("xchgl %0,%1" - : "=r" (oldval), "=m" (*lock) - : "0" (0)); - return oldval > 0 ? 0 : EBUSY; -} -weak_alias (__pthread_spin_trylock, pthread_spin_trylock) - - -int -__pthread_spin_unlock (pthread_spinlock_t *lock) -{ - asm volatile - ("movl $1,%0" - : "=m" (*lock)); - return 0; -} -weak_alias (__pthread_spin_unlock, pthread_spin_unlock) - - -int -__pthread_spin_init (pthread_spinlock_t *lock, int pshared) -{ - /* We can ignore the `pshared' parameter. Since we are busy-waiting - all processes which can access the memory location `lock' points - to can use the spinlock. */ - *lock = 1; - return 0; -} -weak_alias (__pthread_spin_init, pthread_spin_init) - - -int -__pthread_spin_destroy (pthread_spinlock_t *lock) -{ - /* Nothing to do. */ - return 0; -} -weak_alias (__pthread_spin_destroy, pthread_spin_destroy) diff --git a/newlib/libc/sys/linux/linuxthreads/machine/i386/pt-machine.h b/newlib/libc/sys/linux/linuxthreads/machine/i386/pt-machine.h deleted file mode 100644 index 3346bcc34..000000000 --- a/newlib/libc/sys/linux/linuxthreads/machine/i386/pt-machine.h +++ /dev/null @@ -1,98 +0,0 @@ -/* Machine-dependent pthreads configuration and inline functions. - i386 version. - Copyright (C) 1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Richard Henderson <rth@tamu.edu>. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#ifndef PT_EI -# define PT_EI extern inline -#endif - -/* Get some notion of the current stack. Need not be exactly the top - of the stack, just something somewhere in the current frame. */ -#define CURRENT_STACK_FRAME __builtin_frame_address (0) - - -/* Spinlock implementation; required. */ -PT_EI long int -testandset (int *spinlock) -{ - long int ret; - - __asm__ __volatile__( - "xchgl %0, %1" - : "=r"(ret), "=m"(*spinlock) - : "0"(1), "m"(*spinlock) - : "memory"); - - return ret; -} - - -/* Compare-and-swap for semaphores. - Available on the 486 and above, but not on the 386. - We test dynamically whether it's available or not. */ - -#define HAS_COMPARE_AND_SWAP -#define TEST_FOR_COMPARE_AND_SWAP - -PT_EI int -__compare_and_swap (long int *p, long int oldval, long int newval) -{ - char ret; - long int readval; - - __asm__ __volatile__ ("lock; cmpxchgl %3, %1; sete %0" - : "=q" (ret), "=m" (*p), "=a" (readval) - : "r" (newval), "m" (*p), "a" (oldval) - : "memory"); - return ret; -} - - -PT_EI int -get_eflags (void) -{ - int res; - __asm__ __volatile__ ("pushfl; popl %0" : "=r" (res) : ); - return res; -} - - -PT_EI void -set_eflags (int newflags) -{ - __asm__ __volatile__ ("pushl %0; popfl" : : "r" (newflags) : "cc"); -} - - -PT_EI int -compare_and_swap_is_available (void) -{ - int oldflags = get_eflags (); - int changed; - /* Flip AC bit in EFLAGS. */ - set_eflags (oldflags ^ 0x40000); - /* See if bit changed. */ - changed = (get_eflags () ^ oldflags) & 0x40000; - /* Restore EFLAGS. */ - set_eflags (oldflags); - /* If the AC flag did not change, it's a 386 and it lacks cmpxchg. - Otherwise, it's a 486 or above and it has cmpxchg. */ - return changed != 0; -} diff --git a/newlib/libc/sys/linux/linuxthreads/machine/i386/sigcontextinfo.h b/newlib/libc/sys/linux/linuxthreads/machine/i386/sigcontextinfo.h deleted file mode 100644 index 6530ba6f3..000000000 --- a/newlib/libc/sys/linux/linuxthreads/machine/i386/sigcontextinfo.h +++ /dev/null @@ -1,51 +0,0 @@ -/* Copyright (C) 1998, 1999, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#define SIGCONTEXT struct sigcontext -#define SIGCONTEXT_EXTRA_ARGS -#define GET_PC(ctx) ((void *) ctx.eip) -#define GET_FRAME(ctx) ((void *) ctx.ebp) -#define GET_STACK(ctx) ((void *) ctx.esp_at_signal) -#define CALL_SIGHANDLER(handler, signo, ctx) \ -do { \ - int __tmp1, __tmp2, __tmp3, __tmp4; \ - __asm __volatile ("movl\t%%esp, %%edi\n\t" \ - "andl\t$-16, %%esp\n\t" \ - "subl\t%8, %%esp\n\t" \ - "movl\t%%edi, %c8-4(%%esp)\n\t" \ - "movl\t%1, 0(%%esp)\n\t" \ - "leal\t4(%%esp), %%edi\n\t" \ - "cld\n\t" \ - "rep\tmovsl\n\t" \ - "call\t*%0\n\t" \ - "cld\n\t" \ - "movl\t%9, %%ecx\n\t" \ - "subl\t%%edi, %%esi\n\t" \ - "leal\t4(%%esp,%%esi,1), %%edi\n\t" \ - "leal\t4(%%esp), %%esi\n\t" \ - "rep\tmovsl\n\t" \ - "movl\t%c8-4(%%esp), %%esp\n\t" \ - : "=a" (__tmp1), "=d" (__tmp2), "=S" (__tmp3), \ - "=c" (__tmp4) \ - : "0" (handler), "1" (signo), "2" (&ctx), \ - "3" (sizeof (struct sigcontext) / 4), \ - "n" ((sizeof (struct sigcontext) + 19) & ~15), \ - "i" (sizeof (struct sigcontext) / 4) \ - : "cc", "edi"); \ -} while (0) diff --git a/newlib/libc/sys/linux/linuxthreads/machine/i386/stackinfo.h b/newlib/libc/sys/linux/linuxthreads/machine/i386/stackinfo.h deleted file mode 100644 index a9a6745aa..000000000 --- a/newlib/libc/sys/linux/linuxthreads/machine/i386/stackinfo.h +++ /dev/null @@ -1,28 +0,0 @@ -/* Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -/* This file contains a bit of information about the stack allocation - of the processor. */ - -#ifndef _STACKINFO_H -#define _STACKINFO_H 1 - -/* On x86 the stack grows down. */ -#define _STACK_GROWS_DOWN 1 - -#endif /* stackinfo.h */ diff --git a/newlib/libc/sys/linux/linuxthreads/machine/i386/sysdep.S b/newlib/libc/sys/linux/linuxthreads/machine/i386/sysdep.S deleted file mode 100644 index f219805a8..000000000 --- a/newlib/libc/sys/linux/linuxthreads/machine/i386/sysdep.S +++ /dev/null @@ -1,41 +0,0 @@ -/* Copyright (C) 1995, 1996, 1997, 1998 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <sysdep.h> - -/* The following code is only used in the shared library when we - compile the reentrant version. Otherwise each system call defines - each own version. */ - -#ifndef PIC - -/* The syscall stubs jump here when they detect an error. - The code for Linux is almost identical to the canonical Unix/i386 - code, except that the error number in %eax is negated. */ - -#undef CALL_MCOUNT -#define CALL_MCOUNT /* Don't insert the profiling call, it clobbers %eax. */ - - .text -ENTRY (__syscall_error) - negl %eax - -#define __syscall_error __syscall_error_1 -#include <i386-sysdep.S> - -#endif /* !PIC */ diff --git a/newlib/libc/sys/linux/linuxthreads/machine/i386/sysdep.h b/newlib/libc/sys/linux/linuxthreads/machine/i386/sysdep.h deleted file mode 100644 index 48aeab195..000000000 --- a/newlib/libc/sys/linux/linuxthreads/machine/i386/sysdep.h +++ /dev/null @@ -1,291 +0,0 @@ -/* Copyright (C) 1992, 93, 95, 96, 97, 98, 99, 00 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper, <drepper@gnu.org>, August 1995. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#ifndef _LINUX_I386_SYSDEP_H -#define _LINUX_I386_SYSDEP_H 1 - -#include "i386-sysdep.h" - -/* For Linux we can use the system call table in the header file - /usr/include/asm/unistd.h - of the kernel. But these symbols do not follow the SYS_* syntax - so we have to redefine the `SYS_ify' macro here. */ -#undef SYS_ify -#define SYS_ify(syscall_name) __NR_##syscall_name - -/* ELF-like local names start with `.L'. */ -#undef L -#define L(name) .L##name - -#ifdef __ASSEMBLER__ - -/* Linux uses a negative return value to indicate syscall errors, - unlike most Unices, which use the condition codes' carry flag. - - Since version 2.1 the return value of a system call might be - negative even if the call succeeded. E.g., the `lseek' system call - might return a large offset. Therefore we must not anymore test - for < 0, but test for a real error by making sure the value in %eax - is a real error number. Linus said he will make sure the no syscall - returns a value in -1 .. -4095 as a valid result so we can savely - test with -4095. */ - -/* We don't want the label for the error handle to be global when we define - it here. */ -#ifdef PIC -# define SYSCALL_ERROR_LABEL 0f -#else -# define SYSCALL_ERROR_LABEL syscall_error -#endif - -#undef PSEUDO -#define PSEUDO(name, syscall_name, args) \ - .text; \ - ENTRY (name) \ - DO_CALL (args, syscall_name); \ - cmpl $-4095, %eax; \ - jae SYSCALL_ERROR_LABEL; \ - L(pseudo_end): - -#undef PSEUDO_END -#define PSEUDO_END(name) \ - SYSCALL_ERROR_HANDLER \ - END (name) - -#ifndef PIC -#define SYSCALL_ERROR_HANDLER /* Nothing here; code in sysdep.S is used. */ -#else -/* Store (- %eax) into errno through the GOT. */ -#ifdef _LIBC_REENTRANT -#define SYSCALL_ERROR_HANDLER \ -0:pushl %ebx; \ - call 1f; \ -1:popl %ebx; \ - xorl %edx, %edx; \ - addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx; \ - subl %eax, %edx; \ - pushl %edx; \ - PUSH_ERRNO_LOCATION_RETURN; \ - call BP_SYM (__errno_location)@PLT; \ - POP_ERRNO_LOCATION_RETURN; \ - popl %ecx; \ - popl %ebx; \ - movl %ecx, (%eax); \ - orl $-1, %eax; \ - jmp L(pseudo_end); -/* A quick note: it is assumed that the call to `__errno_location' does - not modify the stack! */ -#else -#define SYSCALL_ERROR_HANDLER \ -0:call 1f; \ -1:popl %ecx; \ - xorl %edx, %edx; \ - addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ecx; \ - subl %eax, %edx; \ - movl errno@GOT(%ecx), %ecx; \ - movl %edx, (%ecx); \ - orl $-1, %eax; \ - jmp L(pseudo_end); -#endif /* _LIBC_REENTRANT */ -#endif /* PIC */ - -/* Linux takes system call arguments in registers: - - syscall number %eax call-clobbered - arg 1 %ebx call-saved - arg 2 %ecx call-clobbered - arg 3 %edx call-clobbered - arg 4 %esi call-saved - arg 5 %edi call-saved - - The stack layout upon entering the function is: - - 20(%esp) Arg# 5 - 16(%esp) Arg# 4 - 12(%esp) Arg# 3 - 8(%esp) Arg# 2 - 4(%esp) Arg# 1 - (%esp) Return address - - (Of course a function with say 3 arguments does not have entries for - arguments 4 and 5.) - - The following code tries hard to be optimal. A general assumption - (which is true according to the data books I have) is that - - 2 * xchg is more expensive than pushl + movl + popl - - Beside this a neat trick is used. The calling conventions for Linux - tell that among the registers used for parameters %ecx and %edx need - not be saved. Beside this we may clobber this registers even when - they are not used for parameter passing. - - As a result one can see below that we save the content of the %ebx - register in the %edx register when we have less than 3 arguments - (2 * movl is less expensive than pushl + popl). - - Second unlike for the other registers we don't save the content of - %ecx and %edx when we have more than 1 and 2 registers resp. - - The code below might look a bit long but we have to take care for - the pipelined processors (i586). Here the `pushl' and `popl' - instructions are marked as NP (not pairable) but the exception is - two consecutive of these instruction. This gives no penalty on - other processors though. */ - -#undef DO_CALL -#define DO_CALL(args, syscall_name) \ - PUSHARGS_##args \ - DOARGS_##args \ - movl $SYS_ify (syscall_name), %eax; \ - int $0x80 \ - POPARGS_##args - -#define PUSHARGS_0 /* No arguments to push. */ -#define DOARGS_0 /* No arguments to frob. */ -#define POPARGS_0 /* No arguments to pop. */ -#define _PUSHARGS_0 /* No arguments to push. */ -#define _DOARGS_0(n) /* No arguments to frob. */ -#define _POPARGS_0 /* No arguments to pop. */ - -#define PUSHARGS_1 movl %ebx, %edx; PUSHARGS_0 -#define DOARGS_1 _DOARGS_1 (4) -#define POPARGS_1 POPARGS_0; movl %edx, %ebx -#define _PUSHARGS_1 pushl %ebx; _PUSHARGS_0 -#define _DOARGS_1(n) movl n(%esp), %ebx; _DOARGS_0(n-4) -#define _POPARGS_1 _POPARGS_0; popl %ebx - -#define PUSHARGS_2 PUSHARGS_1 -#define DOARGS_2 _DOARGS_2 (8) -#define POPARGS_2 POPARGS_1 -#define _PUSHARGS_2 _PUSHARGS_1 -#define _DOARGS_2(n) movl n(%esp), %ecx; _DOARGS_1 (n-4) -#define _POPARGS_2 _POPARGS_1 - -#define PUSHARGS_3 _PUSHARGS_2 -#define DOARGS_3 _DOARGS_3 (16) -#define POPARGS_3 _POPARGS_3 -#define _PUSHARGS_3 _PUSHARGS_2 -#define _DOARGS_3(n) movl n(%esp), %edx; _DOARGS_2 (n-4) -#define _POPARGS_3 _POPARGS_2 - -#define PUSHARGS_4 _PUSHARGS_4 -#define DOARGS_4 _DOARGS_4 (24) -#define POPARGS_4 _POPARGS_4 -#define _PUSHARGS_4 pushl %esi; _PUSHARGS_3 -#define _DOARGS_4(n) movl n(%esp), %esi; _DOARGS_3 (n-4) -#define _POPARGS_4 _POPARGS_3; popl %esi - -#define PUSHARGS_5 _PUSHARGS_5 -#define DOARGS_5 _DOARGS_5 (32) -#define POPARGS_5 _POPARGS_5 -#define _PUSHARGS_5 pushl %edi; _PUSHARGS_4 -#define _DOARGS_5(n) movl n(%esp), %edi; _DOARGS_4 (n-4) -#define _POPARGS_5 _POPARGS_4; popl %edi - -#else /* !__ASSEMBLER__ */ - -/* We need some help from the assembler to generate optimal code. We - define some macros here which later will be used. */ -asm (".L__X'%ebx = 1\n\t" - ".L__X'%ecx = 2\n\t" - ".L__X'%edx = 2\n\t" - ".L__X'%eax = 3\n\t" - ".L__X'%esi = 3\n\t" - ".L__X'%edi = 3\n\t" - ".L__X'%ebp = 3\n\t" - ".L__X'%esp = 3\n\t" - ".macro bpushl name reg\n\t" - ".if 1 - \\name\n\t" - ".if 2 - \\name\n\t" - "pushl %ebx\n\t" - ".else\n\t" - "xchgl \\reg, %ebx\n\t" - ".endif\n\t" - ".endif\n\t" - ".endm\n\t" - ".macro bpopl name reg\n\t" - ".if 1 - \\name\n\t" - ".if 2 - \\name\n\t" - "popl %ebx\n\t" - ".else\n\t" - "xchgl \\reg, %ebx\n\t" - ".endif\n\t" - ".endif\n\t" - ".endm\n\t" - ".macro bmovl name reg\n\t" - ".if 1 - \\name\n\t" - ".if 2 - \\name\n\t" - "movl \\reg, %ebx\n\t" - ".endif\n\t" - ".endif\n\t" - ".endm\n\t"); - -/* Define a macro which expands inline into the wrapper code for a system - call. */ -#undef INLINE_SYSCALL -#define INLINE_SYSCALL(name, nr, args...) \ - ({ \ - unsigned int resultvar; \ - asm volatile ( \ - LOADARGS_##nr \ - "movl %1, %%eax\n\t" \ - "int $0x80\n\t" \ - RESTOREARGS_##nr \ - : "=a" (resultvar) \ - : "i" (__NR_##name) ASMFMT_##nr(args) : "memory", "cc"); \ - if (resultvar >= 0xfffff001) \ - { \ - __set_errno (-resultvar); \ - resultvar = 0xffffffff; \ - } \ - (int) resultvar; }) - -#define LOADARGS_0 -#define LOADARGS_1 \ - "bpushl .L__X'%k2, %k2\n\t" \ - "bmovl .L__X'%k2, %k2\n\t" -#define LOADARGS_2 LOADARGS_1 -#define LOADARGS_3 LOADARGS_1 -#define LOADARGS_4 LOADARGS_1 -#define LOADARGS_5 LOADARGS_1 - -#define RESTOREARGS_0 -#define RESTOREARGS_1 \ - "bpopl .L__X'%k2, %k2\n\t" -#define RESTOREARGS_2 RESTOREARGS_1 -#define RESTOREARGS_3 RESTOREARGS_1 -#define RESTOREARGS_4 RESTOREARGS_1 -#define RESTOREARGS_5 RESTOREARGS_1 - -#define ASMFMT_0() -#define ASMFMT_1(arg1) \ - , "acdSD" (arg1) -#define ASMFMT_2(arg1, arg2) \ - , "adCD" (arg1), "c" (arg2) -#define ASMFMT_3(arg1, arg2, arg3) \ - , "aCD" (arg1), "c" (arg2), "d" (arg3) -#define ASMFMT_4(arg1, arg2, arg3, arg4) \ - , "aD" (arg1), "c" (arg2), "d" (arg3), "S" (arg4) -#define ASMFMT_5(arg1, arg2, arg3, arg4, arg5) \ - , "a" (arg1), "c" (arg2), "d" (arg3), "S" (arg4), "D" (arg5) - -#endif /* __ASSEMBLER__ */ - -#endif /* linux/i386/sysdep.h */ diff --git a/newlib/libc/sys/linux/linuxthreads/machine/i386/useldt.h b/newlib/libc/sys/linux/linuxthreads/machine/i386/useldt.h deleted file mode 100644 index 02d079c9e..000000000 --- a/newlib/libc/sys/linux/linuxthreads/machine/i386/useldt.h +++ /dev/null @@ -1,205 +0,0 @@ -/* Special definitions for ix86 machine using segment register based - thread descriptor. - Copyright (C) 1998, 2000, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <stddef.h> /* For offsetof. */ -#include <stdlib.h> /* For abort(). */ - - -/* We don't want to include the kernel header. So duplicate the - information. */ - -/* Structure passed on `modify_ldt' call. */ -struct modify_ldt_ldt_s -{ - unsigned int entry_number; - unsigned long int base_addr; - unsigned int limit; - unsigned int seg_32bit:1; - unsigned int contents:2; - unsigned int read_exec_only:1; - unsigned int limit_in_pages:1; - unsigned int seg_not_present:1; - unsigned int useable:1; - unsigned int empty:25; -}; - -/* System call to set LDT entry. */ -extern int __modify_ldt (int, struct modify_ldt_ldt_s *, size_t); - - -/* Return the thread descriptor for the current thread. - - The contained asm must *not* be marked volatile since otherwise - assignments like - pthread_descr self = thread_self(); - do not get optimized away. */ -#define THREAD_SELF \ -({ \ - register pthread_descr __self; \ - __asm__ ("movl %%gs:%c1,%0" : "=r" (__self) \ - : "i" (offsetof (struct _pthread_descr_struct, \ - p_header.data.self))); \ - __self; \ -}) - -/* Initialize the thread-unique value. */ -#define INIT_THREAD_SELF(descr, nr) \ -{ \ - struct modify_ldt_ldt_s ldt_entry = \ - { nr, (unsigned long int) descr, sizeof (*descr), 1, 0, 0, 0, 0, 1, 0 }; \ - if (__modify_ldt (1, &ldt_entry, sizeof (ldt_entry)) != 0) \ - abort (); \ - __asm__ __volatile__ ("movw %w0, %%gs" : : "q" (nr * 8 + 7)); \ -} - -/* Free resources associated with thread descriptor. */ -#define FREE_THREAD(descr, nr) \ -{ \ - struct modify_ldt_ldt_s ldt_entry = \ - { nr, 0, 0, 0, 0, 1, 0, 1, 0, 0 }; \ - __modify_ldt (1, &ldt_entry, sizeof (ldt_entry)); \ -} - -/* Read member of the thread descriptor directly. */ -#define THREAD_GETMEM(descr, member) \ -({ \ - __typeof__ (descr->member) __value; \ - if (sizeof (__value) == 1) \ - __asm__ __volatile__ ("movb %%gs:%P2,%b0" \ - : "=q" (__value) \ - : "0" (0), \ - "i" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else if (sizeof (__value) == 4) \ - __asm__ __volatile__ ("movl %%gs:%P1,%0" \ - : "=r" (__value) \ - : "i" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else \ - { \ - if (sizeof (__value) != 8) \ - /* There should not be any value with a size other than 1, 4 or 8. */\ - abort (); \ - \ - __asm__ __volatile__ ("movl %%gs:%P1,%%eax\n\t" \ - "movl %%gs:%P2,%%edx" \ - : "=A" (__value) \ - : "i" (offsetof (struct _pthread_descr_struct, \ - member)), \ - "i" (offsetof (struct _pthread_descr_struct, \ - member) + 4)); \ - } \ - __value; \ -}) - -/* Same as THREAD_GETMEM, but the member offset can be non-constant. */ -#define THREAD_GETMEM_NC(descr, member) \ -({ \ - __typeof__ (descr->member) __value; \ - if (sizeof (__value) == 1) \ - __asm__ __volatile__ ("movb %%gs:(%2),%b0" \ - : "=q" (__value) \ - : "0" (0), \ - "r" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else if (sizeof (__value) == 4) \ - __asm__ __volatile__ ("movl %%gs:(%1),%0" \ - : "=r" (__value) \ - : "r" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else \ - { \ - if (sizeof (__value) != 8) \ - /* There should not be any value with a size other than 1, 4 or 8. */\ - abort (); \ - \ - __asm__ __volatile__ ("movl %%gs:(%1),%%eax\n\t" \ - "movl %%gs:4(%1),%%edx" \ - : "=&A" (__value) \ - : "r" (offsetof (struct _pthread_descr_struct, \ - member))); \ - } \ - __value; \ -}) - -/* Same as THREAD_SETMEM, but the member offset can be non-constant. */ -#define THREAD_SETMEM(descr, member, value) \ -({ \ - __typeof__ (descr->member) __value = (value); \ - if (sizeof (__value) == 1) \ - __asm__ __volatile__ ("movb %0,%%gs:%P1" : \ - : "q" (__value), \ - "i" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else if (sizeof (__value) == 4) \ - __asm__ __volatile__ ("movl %0,%%gs:%P1" : \ - : "r" (__value), \ - "i" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else \ - { \ - if (sizeof (__value) != 8) \ - /* There should not be any value with a size other than 1, 4 or 8. */\ - abort (); \ - \ - __asm__ __volatile__ ("movl %%eax,%%gs:%P1\n\n" \ - "movl %%edx,%%gs:%P2" : \ - : "A" (__value), \ - "i" (offsetof (struct _pthread_descr_struct, \ - member)), \ - "i" (offsetof (struct _pthread_descr_struct, \ - member) + 4)); \ - } \ -}) - -/* Set member of the thread descriptor directly. */ -#define THREAD_SETMEM_NC(descr, member, value) \ -({ \ - __typeof__ (descr->member) __value = (value); \ - if (sizeof (__value) == 1) \ - __asm__ __volatile__ ("movb %0,%%gs:(%1)" : \ - : "q" (__value), \ - "r" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else if (sizeof (__value) == 4) \ - __asm__ __volatile__ ("movl %0,%%gs:(%1)" : \ - : "r" (__value), \ - "r" (offsetof (struct _pthread_descr_struct, \ - member))); \ - else \ - { \ - if (sizeof (__value) != 8) \ - /* There should not be any value with a size other than 1, 4 or 8. */\ - abort (); \ - \ - __asm__ __volatile__ ("movl %%eax,%%gs:(%1)\n\t" \ - "movl %%edx,%%gs:4(%1)" : \ - : "A" (__value), \ - "r" (offsetof (struct _pthread_descr_struct, \ - member))); \ - } \ -}) - -/* We want the OS to assign stack addresses. */ -#define FLOATING_STACKS 1 - -/* Maximum size of the stack if the rlimit is unlimited. */ -#define ARCH_STACK_MAX_SIZE 8*1024*1024 diff --git a/newlib/libc/sys/linux/linuxthreads/manager.c b/newlib/libc/sys/linux/linuxthreads/manager.c deleted file mode 100644 index 7729903cf..000000000 --- a/newlib/libc/sys/linux/linuxthreads/manager.c +++ /dev/null @@ -1,981 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* The "thread manager" thread: manages creation and termination of threads */ - -#include <errno.h> -#include <sched.h> -#include <stddef.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <sys/poll.h> /* for poll */ -#include <sys/mman.h> /* for mmap */ -#include <sys/param.h> -#include <sys/time.h> -#include <sys/wait.h> /* for waitpid macros */ - -#include "pthread.h" -#include "internals.h" -#include "spinlock.h" -#include "restart.h" -#include "semaphore.h" - -/* Array of active threads. Entry 0 is reserved for the initial thread. */ -struct pthread_handle_struct __pthread_handles[PTHREAD_THREADS_MAX] = -{ { __LOCK_INITIALIZER, &__pthread_initial_thread, 0}, - { __LOCK_INITIALIZER, &__pthread_manager_thread, 0}, /* All NULLs */ }; - -/* For debugging purposes put the maximum number of threads in a variable. */ -const int __linuxthreads_pthread_threads_max = PTHREAD_THREADS_MAX; - -#ifndef THREAD_SELF -/* Indicate whether at least one thread has a user-defined stack (if 1), - or if all threads have stacks supplied by LinuxThreads (if 0). */ -int __pthread_nonstandard_stacks; -#endif - -/* Number of active entries in __pthread_handles (used by gdb) */ -volatile int __pthread_handles_num = 2; - -/* Whether to use debugger additional actions for thread creation - (set to 1 by gdb) */ -volatile int __pthread_threads_debug; - -/* Globally enabled events. */ -volatile td_thr_events_t __pthread_threads_events; - -/* Pointer to thread descriptor with last event. */ -volatile pthread_descr __pthread_last_event; - -/* Mapping from stack segment to thread descriptor. */ -/* Stack segment numbers are also indices into the __pthread_handles array. */ -/* Stack segment number 0 is reserved for the initial thread. */ - -#if FLOATING_STACKS -# define thread_segment(seq) NULL -#else -static inline pthread_descr thread_segment(int seg) -{ - return (pthread_descr)(THREAD_STACK_START_ADDRESS - (seg - 1) * STACK_SIZE) - - 1; -} -#endif - -/* Flag set in signal handler to record child termination */ - -static volatile int terminated_children; - -/* Flag set when the initial thread is blocked on pthread_exit waiting - for all other threads to terminate */ - -static int main_thread_exiting; - -/* Counter used to generate unique thread identifier. - Thread identifier is pthread_threads_counter + segment. */ - -static pthread_t pthread_threads_counter; - -/* Forward declarations */ - -static int pthread_handle_create(pthread_t *thread, const pthread_attr_t *attr, - void * (*start_routine)(void *), void *arg, - sigset_t *mask, int father_pid, - int report_events, - td_thr_events_t *event_maskp); -static void pthread_handle_free(pthread_t th_id); -static void pthread_handle_exit(pthread_descr issuing_thread, int exitcode) - __attribute__ ((noreturn)); -static void pthread_reap_children(void); -static void pthread_kill_all_threads(int sig, int main_thread_also); -static void pthread_for_each_thread(void *arg, - void (*fn)(void *, pthread_descr)); - -/* The server thread managing requests for thread creation and termination */ - -int -__attribute__ ((noreturn)) -__pthread_manager(void *arg) -{ - int reqfd = (int) (long int) arg; - struct pollfd ufd; - sigset_t manager_mask; - int n; - struct pthread_request request; - - /* If we have special thread_self processing, initialize it. */ -#ifdef INIT_THREAD_SELF - INIT_THREAD_SELF(&__pthread_manager_thread, 1); -#endif - /* Set the error variable. */ - __pthread_manager_thread.p_reentp = &__pthread_manager_thread.p_reent; - __pthread_manager_thread.p_h_errnop = &__pthread_manager_thread.p_h_errno; - /* Block all signals except __pthread_sig_cancel and SIGTRAP */ - sigfillset(&manager_mask); - sigdelset(&manager_mask, __pthread_sig_cancel); /* for thread termination */ - sigdelset(&manager_mask, SIGTRAP); /* for debugging purposes */ - if (__pthread_threads_debug && __pthread_sig_debug > 0) - sigdelset(&manager_mask, __pthread_sig_debug); - sigprocmask(SIG_SETMASK, &manager_mask, NULL); - /* Raise our priority to match that of main thread */ - __pthread_manager_adjust_prio(__pthread_main_thread->p_priority); - /* Synchronize debugging of the thread manager */ - n = TEMP_FAILURE_RETRY(__libc_read(reqfd, (char *)&request, - sizeof(request))); - ASSERT(n == sizeof(request) && request.req_kind == REQ_DEBUG); - ufd.fd = reqfd; - ufd.events = POLLIN; - /* Enter server loop */ - while(1) { - n = __poll(&ufd, 1, 2000); - - /* Check for termination of the main thread */ - if (getppid() == 1) { - pthread_kill_all_threads(SIGKILL, 0); - _exit(0); - } - /* Check for dead children */ - if (terminated_children) { - terminated_children = 0; - pthread_reap_children(); - } - /* Read and execute request */ - if (n == 1 && (ufd.revents & POLLIN)) { - n = TEMP_FAILURE_RETRY(__libc_read(reqfd, (char *)&request, - sizeof(request))); -#ifdef DEBUG - if (n < 0) { - char d[64]; - write(STDERR_FILENO, d, snprintf(d, sizeof(d), "*** read err %m\n")); - } else if (n != sizeof(request)) { - write(STDERR_FILENO, "*** short read in manager\n", 26); - } -#endif - - switch(request.req_kind) { - case REQ_CREATE: - request.req_thread->p_retcode = - pthread_handle_create((pthread_t *) &request.req_thread->p_retval, - request.req_args.create.attr, - request.req_args.create.fn, - request.req_args.create.arg, - &request.req_args.create.mask, - request.req_thread->p_pid, - request.req_thread->p_report_events, - &request.req_thread->p_eventbuf.eventmask); - restart(request.req_thread); - break; - case REQ_FREE: - pthread_handle_free(request.req_args.free.thread_id); - break; - case REQ_PROCESS_EXIT: - pthread_handle_exit(request.req_thread, - request.req_args.exit.code); - /* NOTREACHED */ - break; - case REQ_MAIN_THREAD_EXIT: - main_thread_exiting = 1; - /* Reap children in case all other threads died and the signal handler - went off before we set main_thread_exiting to 1, and therefore did - not do REQ_KICK. */ - pthread_reap_children(); - - if (__pthread_main_thread->p_nextlive == __pthread_main_thread) { - restart(__pthread_main_thread); - /* The main thread will now call exit() which will trigger an - __on_exit handler, which in turn will send REQ_PROCESS_EXIT - to the thread manager. In case you are wondering how the - manager terminates from its loop here. */ - } - break; - case REQ_POST: - __new_sem_post(request.req_args.post); - break; - case REQ_DEBUG: - /* Make gdb aware of new thread and gdb will restart the - new thread when it is ready to handle the new thread. */ - if (__pthread_threads_debug && __pthread_sig_debug > 0) - raise(__pthread_sig_debug); - break; - case REQ_KICK: - /* This is just a prod to get the manager to reap some - threads right away, avoiding a potential delay at shutdown. */ - break; - case REQ_FOR_EACH_THREAD: - pthread_for_each_thread(request.req_args.for_each.arg, - request.req_args.for_each.fn); - restart(request.req_thread); - break; - } - } - } -} - -int __pthread_manager_event(void *arg) -{ - /* If we have special thread_self processing, initialize it. */ -#ifdef INIT_THREAD_SELF - INIT_THREAD_SELF(&__pthread_manager_thread, 1); -#endif - - /* Get the lock the manager will free once all is correctly set up. */ - __pthread_lock (THREAD_GETMEM((&__pthread_manager_thread), p_lock), NULL); - /* Free it immediately. */ - __pthread_unlock (THREAD_GETMEM((&__pthread_manager_thread), p_lock)); - - return __pthread_manager(arg); -} - -/* Process creation */ - -static int -__attribute__ ((noreturn)) -pthread_start_thread(void *arg) -{ - pthread_descr self = (pthread_descr) arg; - struct pthread_request request; - void * outcome; -#if HP_TIMING_AVAIL - hp_timing_t tmpclock; -#endif - /* Initialize special thread_self processing, if any. */ -#ifdef INIT_THREAD_SELF - INIT_THREAD_SELF(self, self->p_nr); -#endif -#if HP_TIMING_AVAIL - HP_TIMING_NOW (tmpclock); - THREAD_SETMEM (self, p_cpuclock_offset, tmpclock); -#endif - /* Make sure our pid field is initialized, just in case we get there - before our father has initialized it. */ - THREAD_SETMEM(self, p_pid, __getpid()); - /* Initial signal mask is that of the creating thread. (Otherwise, - we'd just inherit the mask of the thread manager.) */ - sigprocmask(SIG_SETMASK, &self->p_start_args.mask, NULL); - /* Set the scheduling policy and priority for the new thread, if needed */ - if (THREAD_GETMEM(self, p_start_args.schedpolicy) >= 0) - /* Explicit scheduling attributes were provided: apply them */ - __sched_setscheduler(THREAD_GETMEM(self, p_pid), - THREAD_GETMEM(self, p_start_args.schedpolicy), - &self->p_start_args.schedparam); - else if (__pthread_manager_thread.p_priority > 0) - /* Default scheduling required, but thread manager runs in realtime - scheduling: switch new thread to SCHED_OTHER policy */ - { - struct sched_param default_params; - default_params.sched_priority = 0; - __sched_setscheduler(THREAD_GETMEM(self, p_pid), - SCHED_OTHER, &default_params); - } - /* Make gdb aware of new thread */ - if (__pthread_threads_debug && __pthread_sig_debug > 0) { - request.req_thread = self; - request.req_kind = REQ_DEBUG; - TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request, - (char *) &request, sizeof(request))); - suspend(self); - } - /* Run the thread code */ - outcome = self->p_start_args.start_routine(THREAD_GETMEM(self, - p_start_args.arg)); - /* Exit with the given return value */ - __pthread_do_exit(outcome, CURRENT_STACK_FRAME); -} - -static int -__attribute__ ((noreturn)) -pthread_start_thread_event(void *arg) -{ - pthread_descr self = (pthread_descr) arg; - -#ifdef INIT_THREAD_SELF - INIT_THREAD_SELF(self, self->p_nr); -#endif - /* Make sure our pid field is initialized, just in case we get there - before our father has initialized it. */ - THREAD_SETMEM(self, p_pid, __getpid()); - /* Get the lock the manager will free once all is correctly set up. */ - __pthread_lock (THREAD_GETMEM(self, p_lock), NULL); - /* Free it immediately. */ - __pthread_unlock (THREAD_GETMEM(self, p_lock)); - - /* Continue with the real function. */ - pthread_start_thread (arg); -} - -static int pthread_allocate_stack(const pthread_attr_t *attr, - pthread_descr default_new_thread, - int pagesize, - pthread_descr * out_new_thread, - char ** out_new_thread_bottom, - char ** out_guardaddr, - size_t * out_guardsize) -{ - pthread_descr new_thread; - char * new_thread_bottom; - char * guardaddr; - size_t stacksize, guardsize; - - if (attr != NULL && attr->__stackaddr_set) - { -#ifdef _STACK_GROWS_UP - /* The user provided a stack. */ - new_thread = (pthread_descr) attr->__stackaddr; - new_thread_bottom = (char *) (new_thread + 1); - guardaddr = attr->__stackaddr + attr->__stacksize; - guardsize = 0; -#else - /* The user provided a stack. For now we interpret the supplied - address as 1 + the highest addr. in the stack segment. If a - separate register stack is needed, we place it at the low end - of the segment, relying on the associated stacksize to - determine the low end of the segment. This differs from many - (but not all) other pthreads implementations. The intent is - that on machines with a single stack growing toward higher - addresses, stackaddr would be the lowest address in the stack - segment, so that it is consistently close to the initial sp - value. */ - new_thread = - (pthread_descr) ((long)(attr->__stackaddr) & -sizeof(void *)) - 1; - new_thread_bottom = (char *) attr->__stackaddr - attr->__stacksize; - guardaddr = new_thread_bottom; - guardsize = 0; -#endif -#ifndef THREAD_SELF - __pthread_nonstandard_stacks = 1; -#endif - /* Clear the thread data structure. */ - memset (new_thread, '\0', sizeof (*new_thread)); - } - else - { -#ifdef NEED_SEPARATE_REGISTER_STACK - size_t granularity = 2 * pagesize; - /* Try to make stacksize/2 a multiple of pagesize */ -#else - size_t granularity = pagesize; -#endif - void *map_addr; - - /* Allocate space for stack and thread descriptor at default address */ -#if FLOATING_STACKS - if (attr != NULL) - { - guardsize = page_roundup (attr->__guardsize, granularity); - stacksize = __pthread_max_stacksize - guardsize; - stacksize = MIN (stacksize, - page_roundup (attr->__stacksize, granularity)); - } - else - { - guardsize = granularity; - stacksize = __pthread_max_stacksize - guardsize; - } - - map_addr = mmap(NULL, stacksize + guardsize, - PROT_READ | PROT_WRITE | PROT_EXEC, - MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); - if (map_addr == MAP_FAILED) - /* No more memory available. */ - return -1; - -# ifdef NEED_SEPARATE_REGISTER_STACK - guardaddr = map_addr + stacksize / 2; - if (guardsize > 0) - mprotect (guardaddr, guardsize, PROT_NONE); - - new_thread_bottom = (char *) map_addr; - new_thread = ((pthread_descr) (new_thread_bottom + stacksize - + guardsize)) - 1; -# elif _STACK_GROWS_DOWN - guardaddr = map_addr; - if (guardsize > 0) - mprotect (guardaddr, guardsize, PROT_NONE); - - new_thread_bottom = (char *) map_addr + guardsize; - new_thread = ((pthread_descr) (new_thread_bottom + stacksize)) - 1; -# elif _STACK_GROWS_UP - guardaddr = map_addr + stacksize; - if (guardsize > 0) - mprotect (guardaddr, guardsize, PROT_NONE); - - new_thread = (pthread_descr) map_addr; - new_thread_bottom = (char *) (new_thread + 1); -# else -# error You must define a stack direction -# endif /* Stack direction */ -#else /* !FLOATING_STACKS */ - void *res_addr; - - if (attr != NULL) - { - guardsize = page_roundup (attr->__guardsize, granularity); - stacksize = STACK_SIZE - guardsize; - stacksize = MIN (stacksize, - page_roundup (attr->__stacksize, granularity)); - } - else - { - guardsize = granularity; - stacksize = STACK_SIZE - granularity; - } - -# ifdef NEED_SEPARATE_REGISTER_STACK - new_thread = default_new_thread; - new_thread_bottom = (char *) (new_thread + 1) - stacksize - guardsize; - /* Includes guard area, unlike the normal case. Use the bottom - end of the segment as backing store for the register stack. - Needed on IA64. In this case, we also map the entire stack at - once. According to David Mosberger, that's cheaper. It also - avoids the risk of intermittent failures due to other mappings - in the same region. The cost is that we might be able to map - slightly fewer stacks. */ - - /* First the main stack: */ - map_addr = (caddr_t)((char *)(new_thread + 1) - stacksize / 2); - res_addr = mmap(map_addr, stacksize / 2, - PROT_READ | PROT_WRITE | PROT_EXEC, - MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); - if (res_addr != map_addr) - { - /* Bad luck, this segment is already mapped. */ - if (res_addr != MAP_FAILED) - munmap(res_addr, stacksize / 2); - return -1; - } - /* Then the register stack: */ - map_addr = (caddr_t)new_thread_bottom; - res_addr = mmap(map_addr, stacksize/2, - PROT_READ | PROT_WRITE | PROT_EXEC, - MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); - if (res_addr != map_addr) - { - if (res_addr != MAP_FAILED) - munmap(res_addr, stacksize / 2); - munmap((caddr_t)((char *)(new_thread + 1) - stacksize/2), - stacksize/2); - return -1; - } - - guardaddr = new_thread_bottom + stacksize/2; - /* We leave the guard area in the middle unmapped. */ -# else /* !NEED_SEPARATE_REGISTER_STACK */ -# ifdef _STACK_GROWS_DOWN - new_thread = default_new_thread; - new_thread_bottom = (char *) (new_thread + 1) - stacksize; - map_addr = new_thread_bottom - guardsize; - res_addr = mmap(map_addr, stacksize + guardsize, - PROT_READ | PROT_WRITE | PROT_EXEC, - MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); - if (res_addr != map_addr) - { - /* Bad luck, this segment is already mapped. */ - if (res_addr != MAP_FAILED) - munmap (res_addr, stacksize + guardsize); - return -1; - } - - /* We manage to get a stack. Protect the guard area pages if - necessary. */ - guardaddr = map_addr; - if (guardsize > 0) - mprotect (guardaddr, guardsize, PROT_NONE); -# else - /* The thread description goes at the bottom of this area, and - * the stack starts directly above it. - */ - new_thread = (pthread_descr)((unsigned long)default_new_thread &~ (STACK_SIZE - 1)); - map_addr = mmap(new_thread, stacksize + guardsize, - PROT_READ | PROT_WRITE | PROT_EXEC, - MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); - if (map_addr == MAP_FAILED) - return -1; - - new_thread_bottom = map_addr + sizeof(*new_thread); - guardaddr = map_addr + stacksize; - if (guardsize > 0) - mprotect (guardaddr, guardsize, PROT_NONE); - -# endif /* stack direction */ -# endif /* !NEED_SEPARATE_REGISTER_STACK */ -#endif /* !FLOATING_STACKS */ - } - *out_new_thread = new_thread; - *out_new_thread_bottom = new_thread_bottom; - *out_guardaddr = guardaddr; - *out_guardsize = guardsize; - return 0; -} - -static int pthread_handle_create(pthread_t *thread, const pthread_attr_t *attr, - void * (*start_routine)(void *), void *arg, - sigset_t * mask, int father_pid, - int report_events, - td_thr_events_t *event_maskp) -{ - size_t sseg; - int pid; - pthread_descr new_thread; - char * new_thread_bottom; - pthread_t new_thread_id; - char *guardaddr = NULL; - size_t guardsize = 0; - int pagesize = __getpagesize(); - - /* First check whether we have to change the policy and if yes, whether - we can do this. Normally this should be done by examining the - return value of the __sched_setscheduler call in pthread_start_thread - but this is hard to implement. FIXME */ - if (attr != NULL && attr->__schedpolicy != SCHED_OTHER && geteuid () != 0) - return EPERM; - /* Find a free segment for the thread, and allocate a stack if needed */ - for (sseg = 2; ; sseg++) - { - if (sseg >= PTHREAD_THREADS_MAX) - return EAGAIN; - if (__pthread_handles[sseg].h_descr != NULL) - continue; - if (pthread_allocate_stack(attr, thread_segment(sseg), - pagesize, - &new_thread, &new_thread_bottom, - &guardaddr, &guardsize) == 0) - break; - } - __pthread_handles_num++; - /* Allocate new thread identifier */ - pthread_threads_counter += PTHREAD_THREADS_MAX; - new_thread_id = sseg + pthread_threads_counter; - /* Initialize the thread descriptor. Elements which have to be - initialized to zero already have this value. */ - new_thread->p_tid = new_thread_id; - new_thread->p_lock = &(__pthread_handles[sseg].h_lock); - new_thread->p_cancelstate = PTHREAD_CANCEL_ENABLE; - new_thread->p_canceltype = PTHREAD_CANCEL_DEFERRED; - new_thread->p_reentp = &new_thread->p_reent; - _REENT_INIT_PTR(new_thread->p_reentp); - new_thread->p_h_errnop = &new_thread->p_h_errno; - new_thread->p_resp = &new_thread->p_res; - new_thread->p_guardaddr = guardaddr; - new_thread->p_guardsize = guardsize; - new_thread->p_header.data.self = new_thread; - new_thread->p_nr = sseg; - new_thread->p_inheritsched = attr ? attr->__inheritsched : 0; - /* Initialize the thread handle */ - __pthread_init_lock(&__pthread_handles[sseg].h_lock); - __pthread_handles[sseg].h_descr = new_thread; - __pthread_handles[sseg].h_bottom = new_thread_bottom; - /* Determine scheduling parameters for the thread */ - new_thread->p_start_args.schedpolicy = -1; - if (attr != NULL) { - new_thread->p_detached = attr->__detachstate; - new_thread->p_userstack = attr->__stackaddr_set; - - switch(attr->__inheritsched) { - case PTHREAD_EXPLICIT_SCHED: - new_thread->p_start_args.schedpolicy = attr->__schedpolicy; - memcpy (&new_thread->p_start_args.schedparam, &attr->__schedparam, - sizeof (struct sched_param)); - break; - case PTHREAD_INHERIT_SCHED: - new_thread->p_start_args.schedpolicy = __sched_getscheduler(father_pid); - __sched_getparam(father_pid, &new_thread->p_start_args.schedparam); - break; - } - new_thread->p_priority = - new_thread->p_start_args.schedparam.sched_priority; - } - /* Finish setting up arguments to pthread_start_thread */ - new_thread->p_start_args.start_routine = start_routine; - new_thread->p_start_args.arg = arg; - new_thread->p_start_args.mask = *mask; - /* Make the new thread ID available already now. If any of the later - functions fail we return an error value and the caller must not use - the stored thread ID. */ - *thread = new_thread_id; - /* Raise priority of thread manager if needed */ - __pthread_manager_adjust_prio(new_thread->p_priority); - /* Do the cloning. We have to use two different functions depending - on whether we are debugging or not. */ - pid = 0; /* Note that the thread never can have PID zero. */ - if (report_events) - { - /* See whether the TD_CREATE event bit is set in any of the - masks. */ - int idx = __td_eventword (TD_CREATE); - uint32_t mask = __td_eventmask (TD_CREATE); - - if ((mask & (__pthread_threads_events.event_bits[idx] - | event_maskp->event_bits[idx])) != 0) - { - /* Lock the mutex the child will use now so that it will stop. */ - __pthread_lock(new_thread->p_lock, NULL); - - /* We have to report this event. */ -#ifdef NEED_SEPARATE_REGISTER_STACK - /* Perhaps this version should be used on all platforms. But - this requires that __clone2 be uniformly supported - everywhere. - - And there is some argument for changing the __clone2 - interface to pass sp and bsp instead, making it more IA64 - specific, but allowing stacks to grow outward from each - other, to get less paging and fewer mmaps. */ - pid = __clone2(pthread_start_thread_event, - (void **)new_thread_bottom, - (char *)new_thread - new_thread_bottom, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND | - __pthread_sig_cancel, new_thread); -#elif _STACK_GROWS_UP - pid = __clone(pthread_start_thread_event, (void **) new_thread_bottom, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND | - __pthread_sig_cancel, new_thread); -#else - pid = __clone(pthread_start_thread_event, (void **) new_thread, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND | - __pthread_sig_cancel, new_thread); -#endif - if (pid != -1) - { - /* Now fill in the information about the new thread in - the newly created thread's data structure. We cannot let - the new thread do this since we don't know whether it was - already scheduled when we send the event. */ - new_thread->p_eventbuf.eventdata = new_thread; - new_thread->p_eventbuf.eventnum = TD_CREATE; - __pthread_last_event = new_thread; - - /* We have to set the PID here since the callback function - in the debug library will need it and we cannot guarantee - the child got scheduled before the debugger. */ - new_thread->p_pid = pid; - - /* Now call the function which signals the event. */ - __linuxthreads_create_event (); - - /* Now restart the thread. */ - __pthread_unlock(new_thread->p_lock); - } - } - } - if (pid == 0) - { -#ifdef NEED_SEPARATE_REGISTER_STACK - pid = __clone2(pthread_start_thread, - (void **)new_thread_bottom, - (char *)new_thread - new_thread_bottom, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND | - __pthread_sig_cancel, new_thread); -#elif _STACK_GROWS_UP - pid = __clone(pthread_start_thread, (void **) new_thread_bottom, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND | - __pthread_sig_cancel, new_thread); -#else - pid = __clone(pthread_start_thread, (void **) new_thread, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND | - __pthread_sig_cancel, new_thread); -#endif /* !NEED_SEPARATE_REGISTER_STACK */ - } - /* Check if cloning succeeded */ - if (pid == -1) { - /* Free the stack if we allocated it */ - if (attr == NULL || !attr->__stackaddr_set) - { -#ifdef NEED_SEPARATE_REGISTER_STACK - size_t stacksize = ((char *)(new_thread->p_guardaddr) - - new_thread_bottom); - munmap((caddr_t)new_thread_bottom, - 2 * stacksize + new_thread->p_guardsize); -#elif _STACK_GROWS_UP - size_t stacksize = guardaddr - (char *)new_thread; - munmap(new_thread, stacksize + guardsize); -#else - size_t stacksize = (char *)(new_thread+1) - new_thread_bottom; - munmap(new_thread_bottom - guardsize, guardsize + stacksize); -#endif - } - __pthread_handles[sseg].h_descr = NULL; - __pthread_handles[sseg].h_bottom = NULL; - __pthread_handles_num--; - return errno; - } - /* Insert new thread in doubly linked list of active threads */ - new_thread->p_prevlive = __pthread_main_thread; - new_thread->p_nextlive = __pthread_main_thread->p_nextlive; - __pthread_main_thread->p_nextlive->p_prevlive = new_thread; - __pthread_main_thread->p_nextlive = new_thread; - /* Set pid field of the new thread, in case we get there before the - child starts. */ - new_thread->p_pid = pid; - return 0; -} - - -/* Try to free the resources of a thread when requested by pthread_join - or pthread_detach on a terminated thread. */ - -static void pthread_free(pthread_descr th) -{ - pthread_handle handle; - pthread_readlock_info *iter, *next; - - ASSERT(th->p_exited); - /* Make the handle invalid */ - handle = thread_handle(th->p_tid); - __pthread_lock(&handle->h_lock, NULL); - handle->h_descr = NULL; - handle->h_bottom = (char *)(-1L); - __pthread_unlock(&handle->h_lock); -#ifdef FREE_THREAD - FREE_THREAD(th, th->p_nr); -#endif - /* One fewer threads in __pthread_handles */ - __pthread_handles_num--; - - /* Destroy read lock list, and list of free read lock structures. - If the former is not empty, it means the thread exited while - holding read locks! */ - - for (iter = th->p_readlock_list; iter != NULL; iter = next) - { - next = iter->pr_next; - free(iter); - } - - for (iter = th->p_readlock_free; iter != NULL; iter = next) - { - next = iter->pr_next; - free(iter); - } - - /* If initial thread, nothing to free */ - if (!th->p_userstack) - { - size_t guardsize = th->p_guardsize; - /* Free the stack and thread descriptor area */ - char *guardaddr = th->p_guardaddr; -#ifdef _STACK_GROWS_UP - size_t stacksize = guardaddr - (char *)th; - guardaddr = (char *)th; -#else - /* Guardaddr is always set, even if guardsize is 0. This allows - us to compute everything else. */ - size_t stacksize = (char *)(th+1) - guardaddr - guardsize; -#ifdef NEED_SEPARATE_REGISTER_STACK - /* Take account of the register stack, which is below guardaddr. */ - guardaddr -= stacksize; - stacksize *= 2; -#endif -#endif - /* Unmap the stack. */ - munmap(guardaddr, stacksize + guardsize); - } -} - -/* Handle threads that have exited */ - -static void pthread_exited(pid_t pid) -{ - pthread_descr th; - int detached; - /* Find thread with that pid */ - for (th = __pthread_main_thread->p_nextlive; - th != __pthread_main_thread; - th = th->p_nextlive) { - if (th->p_pid == pid) { - /* Remove thread from list of active threads */ - th->p_nextlive->p_prevlive = th->p_prevlive; - th->p_prevlive->p_nextlive = th->p_nextlive; - /* Mark thread as exited, and if detached, free its resources */ - __pthread_lock(th->p_lock, NULL); - th->p_exited = 1; - /* If we have to signal this event do it now. */ - if (th->p_report_events) - { - /* See whether TD_REAP is in any of the mask. */ - int idx = __td_eventword (TD_REAP); - uint32_t mask = __td_eventmask (TD_REAP); - - if ((mask & (__pthread_threads_events.event_bits[idx] - | th->p_eventbuf.eventmask.event_bits[idx])) != 0) - { - /* Yep, we have to signal the reapage. */ - th->p_eventbuf.eventnum = TD_REAP; - th->p_eventbuf.eventdata = th; - __pthread_last_event = th; - - /* Now call the function to signal the event. */ - __linuxthreads_reap_event(); - } - } - detached = th->p_detached; - __pthread_unlock(th->p_lock); - if (detached) - pthread_free(th); - break; - } - } - /* If all threads have exited and the main thread is pending on a - pthread_exit, wake up the main thread and terminate ourselves. */ - if (main_thread_exiting && - __pthread_main_thread->p_nextlive == __pthread_main_thread) { - restart(__pthread_main_thread); - /* Same logic as REQ_MAIN_THREAD_EXIT. */ - } -} - -static void pthread_reap_children(void) -{ - pid_t pid; - int status; - - while ((pid = __libc___waitpid(-1, &status, WNOHANG | __WCLONE)) > 0) { - pthread_exited(pid); - if (WIFSIGNALED(status)) { - /* If a thread died due to a signal, send the same signal to - all other threads, including the main thread. */ - pthread_kill_all_threads(WTERMSIG(status), 1); - _exit(0); - } - } -} - -/* Try to free the resources of a thread when requested by pthread_join - or pthread_detach on a terminated thread. */ - -static void pthread_handle_free(pthread_t th_id) -{ - pthread_handle handle = thread_handle(th_id); - pthread_descr th; - - __pthread_lock(&handle->h_lock, NULL); - if (nonexisting_handle(handle, th_id)) { - /* pthread_reap_children has deallocated the thread already, - nothing needs to be done */ - __pthread_unlock(&handle->h_lock); - return; - } - th = handle->h_descr; - if (th->p_exited) { - __pthread_unlock(&handle->h_lock); - pthread_free(th); - } else { - /* The Unix process of the thread is still running. - Mark the thread as detached so that the thread manager will - deallocate its resources when the Unix process exits. */ - th->p_detached = 1; - __pthread_unlock(&handle->h_lock); - } -} - -/* Send a signal to all running threads */ - -static void pthread_kill_all_threads(int sig, int main_thread_also) -{ - pthread_descr th; - for (th = __pthread_main_thread->p_nextlive; - th != __pthread_main_thread; - th = th->p_nextlive) { - kill(th->p_pid, sig); - } - if (main_thread_also) { - kill(__pthread_main_thread->p_pid, sig); - } -} - -static void pthread_for_each_thread(void *arg, - void (*fn)(void *, pthread_descr)) -{ - pthread_descr th; - - for (th = __pthread_main_thread->p_nextlive; - th != __pthread_main_thread; - th = th->p_nextlive) { - fn(arg, th); - } - - fn(arg, __pthread_main_thread); -} - -/* Process-wide exit() */ - -static void pthread_handle_exit(pthread_descr issuing_thread, int exitcode) -{ - pthread_descr th; - __pthread_exit_requested = 1; - __pthread_exit_code = exitcode; - /* A forced asynchronous cancellation follows. Make sure we won't - get stuck later in the main thread with a system lock being held - by one of the cancelled threads. Ideally one would use the same - code as in pthread_atfork(), but we can't distinguish system and - user handlers there. */ - __flockfilelist(); - /* Send the CANCEL signal to all running threads, including the main - thread, but excluding the thread from which the exit request originated - (that thread must complete the exit, e.g. calling atexit functions - and flushing stdio buffers). */ - for (th = issuing_thread->p_nextlive; - th != issuing_thread; - th = th->p_nextlive) { - kill(th->p_pid, __pthread_sig_cancel); - } - /* Now, wait for all these threads, so that they don't become zombies - and their times are properly added to the thread manager's times. */ - for (th = issuing_thread->p_nextlive; - th != issuing_thread; - th = th->p_nextlive) { - __waitpid(th->p_pid, NULL, __WCLONE); - } - __fresetlockfiles(); - restart(issuing_thread); - _exit(0); -} - -/* Handler for __pthread_sig_cancel in thread manager thread */ - -void __pthread_manager_sighandler(int sig) -{ - int kick_manager = terminated_children == 0 && main_thread_exiting; - terminated_children = 1; - - /* If the main thread is terminating, kick the thread manager loop - each time some threads terminate. This eliminates a two second - shutdown delay caused by the thread manager sleeping in the - call to __poll(). Instead, the thread manager is kicked into - action, reaps the outstanding threads and resumes the main thread - so that it can complete the shutdown. */ - - if (kick_manager) { - struct pthread_request request; - request.req_thread = 0; - request.req_kind = REQ_KICK; - TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request, - (char *) &request, sizeof(request))); - } -} - -/* Adjust priority of thread manager so that it always run at a priority - higher than all threads */ - -void __pthread_manager_adjust_prio(int thread_prio) -{ - struct sched_param param; - - if (thread_prio <= __pthread_manager_thread.p_priority) return; - param.sched_priority = - thread_prio < __sched_get_priority_max(SCHED_FIFO) - ? thread_prio + 1 : thread_prio; - __sched_setscheduler(__pthread_manager_thread.p_pid, SCHED_FIFO, ¶m); - __pthread_manager_thread.p_priority = thread_prio; -} diff --git a/newlib/libc/sys/linux/linuxthreads/mq_notify.c b/newlib/libc/sys/linux/linuxthreads/mq_notify.c deleted file mode 100644 index 46492e470..000000000 --- a/newlib/libc/sys/linux/linuxthreads/mq_notify.c +++ /dev/null @@ -1,106 +0,0 @@ -/* Copyright 2002, Red Hat Inc. */ - -#include <mqueue.h> -#include <unistd.h> -#include <errno.h> -#include <sys/ipc.h> -#include <sys/sem.h> -#include <string.h> - -#include "internals.h" -#include <sys/lock.h> - -#include "mqlocal.h" - -static void *mq_notify_process (void *); - -void -__cleanup_mq_notify (struct libc_mq *info) -{ - struct sembuf sb4 = {4, 1, 0}; - /* kill notification thread and allow other processes to set a notification */ - pthread_cancel ((pthread_t)info->th); - semop (info->semid, &sb4, 1); -} - -static void * -mq_notify_process (void *arg) -{ - struct libc_mq *info = (struct libc_mq *)arg; - struct sembuf sb3[2] = {{3, 0, 0}, {5, 0, 0}}; - struct sembuf sb4 = {4, 1, 0}; - int rc; - - /* wait until queue is empty */ - while (!(rc = semop (info->semid, sb3, 1)) && errno == EINTR) - /* empty */ ; - - if (!rc) - { - /* now wait until there are 0 readers and the queue has something in it */ - sb3[0].sem_op = -1; - while (!(rc = semop (info->semid, sb3, 2)) && errno == EINTR) - /* empty */ ; - /* restore value since we have not actually performed a read */ - sb3[0].sem_op = 1; - semop (info->semid, sb3, 1); - /* perform desired notification - either run function in this thread or pass signal */ - if (!rc) - { - if (info->sigevent->sigev_notify == SIGEV_SIGNAL) - raise (info->sigevent->sigev_signo); - else if (info->sigevent->sigev_notify == SIGEV_THREAD) - info->sigevent->sigev_notify_function (info->sigevent->sigev_value); - /* allow other processes to now mq_notify */ - semop (info->semid, &sb4, 1); - } - } - pthread_exit (NULL); -} - -int -mq_notify (mqd_t msgid, const struct sigevent *notification) -{ - struct libc_mq *info; - struct sembuf sb4 = {4, -1, IPC_NOWAIT}; - int rc; - pthread_attr_t *attr = NULL; - - info = __find_mq (msgid); - - if (info == NULL) - { - errno = EBADF; - return -1; - } - - /* get notification lock */ - rc = semop (info->semid, &sb4, 1); - - if (rc == -1) - { - errno = EBUSY; - return -1; - } - - /* to get the notification running we use a pthread - if the user has requested - an action in a pthread, we use the user's attributes when setting up the thread */ - info->sigevent = (struct sigevent *)notification; - if (info->sigevent->sigev_notify == SIGEV_THREAD) - attr = (pthread_attr_t *)info->sigevent->sigev_notify_attributes; - rc = pthread_create ((pthread_t *)&info->th, attr, mq_notify_process, (void *)info); - - if (rc != 0) - rc = -1; - else - info->cleanup_notify = &__cleanup_mq_notify; - - return rc; -} - - - - - - - diff --git a/newlib/libc/sys/linux/linuxthreads/mutex.c b/newlib/libc/sys/linux/linuxthreads/mutex.c deleted file mode 100644 index fb2e60770..000000000 --- a/newlib/libc/sys/linux/linuxthreads/mutex.c +++ /dev/null @@ -1,366 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Mutexes */ - -#include <bits/libc-lock.h> -#include <errno.h> -#include <sched.h> -#include <stddef.h> -#include <limits.h> -#include "pthread.h" -#include "internals.h" -#include "spinlock.h" -#include "queue.h" -#include "restart.h" - -int __pthread_mutex_init(pthread_mutex_t * mutex, - const pthread_mutexattr_t * mutex_attr) -{ - __pthread_init_lock(&mutex->__m_lock); - mutex->__m_kind = - mutex_attr == NULL ? PTHREAD_MUTEX_TIMED_NP : mutex_attr->__mutexkind; - mutex->__m_count = 0; - mutex->__m_owner = NULL; - return 0; -} -strong_alias (__pthread_mutex_init, pthread_mutex_init) - -int __pthread_mutex_destroy(pthread_mutex_t * mutex) -{ - switch (mutex->__m_kind) { - case PTHREAD_MUTEX_ADAPTIVE_NP: - case PTHREAD_MUTEX_RECURSIVE_NP: - if ((mutex->__m_lock.__status & 1) != 0) - return EBUSY; - return 0; - case PTHREAD_MUTEX_ERRORCHECK_NP: - case PTHREAD_MUTEX_TIMED_NP: - if (mutex->__m_lock.__status != 0) - return EBUSY; - return 0; - default: - return EINVAL; - } -} -strong_alias (__pthread_mutex_destroy, pthread_mutex_destroy) - -int __pthread_mutex_trylock(pthread_mutex_t * mutex) -{ - pthread_descr self; - int retcode; - - switch(mutex->__m_kind) { - case PTHREAD_MUTEX_ADAPTIVE_NP: - retcode = __pthread_trylock(&mutex->__m_lock); - return retcode; - case PTHREAD_MUTEX_RECURSIVE_NP: - self = thread_self(); - if (mutex->__m_owner == self) { - mutex->__m_count++; - return 0; - } - retcode = __pthread_trylock(&mutex->__m_lock); - if (retcode == 0) { - mutex->__m_owner = self; - mutex->__m_count = 0; - } - return retcode; - case PTHREAD_MUTEX_ERRORCHECK_NP: - retcode = __pthread_alt_trylock(&mutex->__m_lock); - if (retcode == 0) { - mutex->__m_owner = thread_self(); - } - return retcode; - case PTHREAD_MUTEX_TIMED_NP: - retcode = __pthread_alt_trylock(&mutex->__m_lock); - return retcode; - default: - return EINVAL; - } -} -strong_alias (__pthread_mutex_trylock, pthread_mutex_trylock) - -int __pthread_mutex_lock(pthread_mutex_t * mutex) -{ - pthread_descr self; - - switch(mutex->__m_kind) { - case PTHREAD_MUTEX_ADAPTIVE_NP: - __pthread_lock(&mutex->__m_lock, NULL); - return 0; - case PTHREAD_MUTEX_RECURSIVE_NP: - self = thread_self(); - if (mutex->__m_owner == self) { - mutex->__m_count++; - return 0; - } - __pthread_lock(&mutex->__m_lock, self); - mutex->__m_owner = self; - mutex->__m_count = 0; - return 0; - case PTHREAD_MUTEX_ERRORCHECK_NP: - self = thread_self(); - if (mutex->__m_owner == self) return EDEADLK; - __pthread_alt_lock(&mutex->__m_lock, self); - mutex->__m_owner = self; - return 0; - case PTHREAD_MUTEX_TIMED_NP: - __pthread_alt_lock(&mutex->__m_lock, NULL); - return 0; - default: - return EINVAL; - } -} -strong_alias (__pthread_mutex_lock, pthread_mutex_lock) - -int __pthread_mutex_timedlock (pthread_mutex_t *mutex, - const struct timespec *abstime) -{ - pthread_descr self; - int res; - - if (__builtin_expect (abstime->tv_nsec, 0) < 0 - || __builtin_expect (abstime->tv_nsec, 0) >= 1000000000) - return EINVAL; - - switch(mutex->__m_kind) { - case PTHREAD_MUTEX_ADAPTIVE_NP: - __pthread_lock(&mutex->__m_lock, NULL); - return 0; - case PTHREAD_MUTEX_RECURSIVE_NP: - self = thread_self(); - if (mutex->__m_owner == self) { - mutex->__m_count++; - return 0; - } - __pthread_lock(&mutex->__m_lock, self); - mutex->__m_owner = self; - mutex->__m_count = 0; - return 0; - case PTHREAD_MUTEX_ERRORCHECK_NP: - self = thread_self(); - if (mutex->__m_owner == self) return EDEADLK; - res = __pthread_alt_timedlock(&mutex->__m_lock, self, abstime); - if (res != 0) - { - mutex->__m_owner = self; - return 0; - } - return ETIMEDOUT; - case PTHREAD_MUTEX_TIMED_NP: - /* Only this type supports timed out lock. */ - return (__pthread_alt_timedlock(&mutex->__m_lock, NULL, abstime) - ? 0 : ETIMEDOUT); - default: - return EINVAL; - } -} -strong_alias (__pthread_mutex_timedlock, pthread_mutex_timedlock) - -int __pthread_mutex_unlock(pthread_mutex_t * mutex) -{ - switch (mutex->__m_kind) { - case PTHREAD_MUTEX_ADAPTIVE_NP: - __pthread_unlock(&mutex->__m_lock); - return 0; - case PTHREAD_MUTEX_RECURSIVE_NP: - if (mutex->__m_owner != thread_self()) - return EPERM; - if (mutex->__m_count > 0) { - mutex->__m_count--; - return 0; - } - mutex->__m_owner = NULL; - __pthread_unlock(&mutex->__m_lock); - return 0; - case PTHREAD_MUTEX_ERRORCHECK_NP: - if (mutex->__m_owner != thread_self() || mutex->__m_lock.__status == 0) - return EPERM; - mutex->__m_owner = NULL; - __pthread_alt_unlock(&mutex->__m_lock); - return 0; - case PTHREAD_MUTEX_TIMED_NP: - __pthread_alt_unlock(&mutex->__m_lock); - return 0; - default: - return EINVAL; - } -} -strong_alias (__pthread_mutex_unlock, pthread_mutex_unlock) - -int __pthread_mutexattr_init(pthread_mutexattr_t *attr) -{ - attr->__mutexkind = PTHREAD_MUTEX_TIMED_NP; - return 0; -} -strong_alias (__pthread_mutexattr_init, pthread_mutexattr_init) - -int __pthread_mutexattr_destroy(pthread_mutexattr_t *attr) -{ - return 0; -} -strong_alias (__pthread_mutexattr_destroy, pthread_mutexattr_destroy) - -int __pthread_mutexattr_settype(pthread_mutexattr_t *attr, int kind) -{ - if (kind != PTHREAD_MUTEX_ADAPTIVE_NP - && kind != PTHREAD_MUTEX_RECURSIVE_NP - && kind != PTHREAD_MUTEX_ERRORCHECK_NP - && kind != PTHREAD_MUTEX_TIMED_NP) - return EINVAL; - attr->__mutexkind = kind; - return 0; -} -weak_alias (__pthread_mutexattr_settype, pthread_mutexattr_settype) -#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 2 -strong_alias ( __pthread_mutexattr_settype, __pthread_mutexattr_setkind_np) -weak_alias (__pthread_mutexattr_setkind_np, pthread_mutexattr_setkind_np) -#endif /* !_ELIX_LEVEL || _ELIX_LEVEL >= 2 */ - -int __pthread_mutexattr_gettype(const pthread_mutexattr_t *attr, int *kind) -{ - *kind = attr->__mutexkind; - return 0; -} -weak_alias (__pthread_mutexattr_gettype, pthread_mutexattr_gettype) -#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 2 -strong_alias (__pthread_mutexattr_gettype, __pthread_mutexattr_getkind_np) -weak_alias (__pthread_mutexattr_getkind_np, pthread_mutexattr_getkind_np) -#endif /* !_ELIX_LEVEL || _ELIX_LEVEL >= 2 */ - - -#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 3 - -int __pthread_mutexattr_getpshared (const pthread_mutexattr_t *attr, - int *pshared) -{ - *pshared = PTHREAD_PROCESS_PRIVATE; - return 0; -} -weak_alias (__pthread_mutexattr_getpshared, pthread_mutexattr_getpshared) - -int __pthread_mutexattr_setpshared (pthread_mutexattr_t *attr, int pshared) -{ - if (pshared != PTHREAD_PROCESS_PRIVATE && pshared != PTHREAD_PROCESS_SHARED) - return EINVAL; - - /* For now it is not possible to shared a conditional variable. */ - if (pshared != PTHREAD_PROCESS_PRIVATE) - return ENOSYS; - - return 0; -} -weak_alias (__pthread_mutexattr_setpshared, pthread_mutexattr_setpshared) - -#endif /* !_ELIX_LEVEL || _ELIX_LEVEL >= 3 */ - -/* Once-only execution */ - -static pthread_mutex_t once_masterlock = PTHREAD_MUTEX_INITIALIZER; -static pthread_cond_t once_finished = PTHREAD_COND_INITIALIZER; -static int fork_generation = 0; /* Child process increments this after fork. */ - -enum { NEVER = 0, IN_PROGRESS = 1, DONE = 2 }; - -/* If a thread is canceled while calling the init_routine out of - pthread once, this handler will reset the once_control variable - to the NEVER state. */ - -static void pthread_once_cancelhandler(void *arg) -{ - pthread_once_t *once_control = arg; - - pthread_mutex_lock(&once_masterlock); - *once_control = NEVER; - pthread_mutex_unlock(&once_masterlock); - pthread_cond_broadcast(&once_finished); -} - -int __pthread_once(pthread_once_t * once_control, void (*init_routine)(void)) -{ - /* flag for doing the condition broadcast outside of mutex */ - int state_changed; - - /* Test without locking first for speed */ - if (*once_control == DONE) { - READ_MEMORY_BARRIER(); - return 0; - } - /* Lock and test again */ - - state_changed = 0; - - pthread_mutex_lock(&once_masterlock); - - /* If this object was left in an IN_PROGRESS state in a parent - process (indicated by stale generation field), reset it to NEVER. */ - if ((*once_control & 3) == IN_PROGRESS && (*once_control & ~3) != fork_generation) - *once_control = NEVER; - - /* If init_routine is being called from another routine, wait until - it completes. */ - while ((*once_control & 3) == IN_PROGRESS) { - pthread_cond_wait(&once_finished, &once_masterlock); - } - /* Here *once_control is stable and either NEVER or DONE. */ - if (*once_control == NEVER) { - *once_control = IN_PROGRESS | fork_generation; - pthread_mutex_unlock(&once_masterlock); - pthread_cleanup_push(pthread_once_cancelhandler, once_control); - init_routine(); - pthread_cleanup_pop(0); - pthread_mutex_lock(&once_masterlock); - WRITE_MEMORY_BARRIER(); - *once_control = DONE; - state_changed = 1; - } - pthread_mutex_unlock(&once_masterlock); - - if (state_changed) - pthread_cond_broadcast(&once_finished); - - return 0; -} -strong_alias (__pthread_once, pthread_once) - -/* - * Handle the state of the pthread_once mechanism across forks. The - * once_masterlock is acquired in the parent process prior to a fork to ensure - * that no thread is in the critical region protected by the lock. After the - * fork, the lock is released. In the child, the lock and the condition - * variable are simply reset. The child also increments its generation - * counter which lets pthread_once calls detect stale IN_PROGRESS states - * and reset them back to NEVER. - */ - -void __pthread_once_fork_prepare(void) -{ - pthread_mutex_lock(&once_masterlock); -} - -void __pthread_once_fork_parent(void) -{ - pthread_mutex_unlock(&once_masterlock); -} - -void __pthread_once_fork_child(void) -{ - pthread_mutex_init(&once_masterlock, NULL); - pthread_cond_init(&once_finished, NULL); - if (fork_generation <= INT_MAX - 4) - fork_generation += 4; /* leave least significant two bits zero */ - else - fork_generation = 0; -} diff --git a/newlib/libc/sys/linux/linuxthreads/no-tsd.c b/newlib/libc/sys/linux/linuxthreads/no-tsd.c deleted file mode 100644 index 84abb6f40..000000000 --- a/newlib/libc/sys/linux/linuxthreads/no-tsd.c +++ /dev/null @@ -1,34 +0,0 @@ -/* libc-internal interface for thread-specific data. - Copyright (C) 1998, 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <sys/cdefs.h> /* for __const */ -#include <bits/libc-tsd.h> - -/* This file provides uinitialized (common) definitions for the - hooks used internally by libc to access thread-specific data. - - When -lpthread is used, it provides initialized definitions for these - variables (in specific.c), which override these uninitialized definitions. - - If -lpthread is not used, these uninitialized variables default to zero, - which the __libc_tsd_* macros check for. */ - -void *(*__libc_internal_tsd_get) (enum __libc_tsd_key_t); -int (*__libc_internal_tsd_set) (enum __libc_tsd_key_t, - __const void *); diff --git a/newlib/libc/sys/linux/linuxthreads/oldsemaphore.c b/newlib/libc/sys/linux/linuxthreads/oldsemaphore.c deleted file mode 100644 index 80a82dfcf..000000000 --- a/newlib/libc/sys/linux/linuxthreads/oldsemaphore.c +++ /dev/null @@ -1,245 +0,0 @@ -/* - * This file contains the old semaphore code that we need to - * preserve for glibc-2.0 backwards compatibility. Port to glibc 2.1 - * done by Cristian Gafton. - */ - -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Semaphores a la POSIX 1003.1b */ -#include <shlib-compat.h> -#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1) - -#include <errno.h> -#include "pthread.h" -#include "internals.h" -#include "spinlock.h" -#include "restart.h" -#include "queue.h" - -typedef struct { - long int sem_status; - int sem_spinlock; -} old_sem_t; - -extern int __old_sem_init (old_sem_t *__sem, int __pshared, unsigned int __value); -extern int __old_sem_wait (old_sem_t *__sem); -extern int __old_sem_trywait (old_sem_t *__sem); -extern int __old_sem_post (old_sem_t *__sem); -extern int __old_sem_getvalue (old_sem_t *__sem, int *__sval); -extern int __old_sem_destroy (old_sem_t *__sem); - - -/* Maximum value the semaphore can have. */ -#define SEM_VALUE_MAX ((int) ((~0u) >> 1)) - -static inline int sem_compare_and_swap(old_sem_t *sem, long oldval, long newval) -{ - return compare_and_swap(&sem->sem_status, oldval, newval, &sem->sem_spinlock); -} - -/* The state of a semaphore is represented by a long int encoding - either the semaphore count if >= 0 and no thread is waiting on it, - or the head of the list of threads waiting for the semaphore. - To distinguish the two cases, we encode the semaphore count N - as 2N+1, so that it has the lowest bit set. - - A sequence of sem_wait operations on a semaphore initialized to N - result in the following successive states: - 2N+1, 2N-1, ..., 3, 1, &first_waiting_thread, &second_waiting_thread, ... -*/ - -static void sem_restart_list(pthread_descr waiting); - -int __old_sem_init(old_sem_t *sem, int pshared, unsigned int value) -{ - if (value > SEM_VALUE_MAX) { - errno = EINVAL; - return -1; - } - if (pshared) { - errno = ENOSYS; - return -1; - } - sem->sem_spinlock = __LT_SPINLOCK_INIT; - sem->sem_status = ((long)value << 1) + 1; - return 0; -} - -/* Function called by pthread_cancel to remove the thread from - waiting inside __old_sem_wait. Here we simply unconditionally - indicate that the thread is to be woken, by returning 1. */ - -static int old_sem_extricate_func(void *obj, pthread_descr th) -{ - return 1; -} - -int __old_sem_wait(old_sem_t * sem) -{ - long oldstatus, newstatus; - volatile pthread_descr self = thread_self(); - pthread_descr * th; - pthread_extricate_if extr; - - /* Set up extrication interface */ - extr.pu_object = 0; - extr.pu_extricate_func = old_sem_extricate_func; - - while (1) { - /* Register extrication interface */ - __pthread_set_own_extricate_if(self, &extr); - do { - oldstatus = sem->sem_status; - if ((oldstatus & 1) && (oldstatus != 1)) - newstatus = oldstatus - 2; - else { - newstatus = (long) self; - self->p_nextwaiting = (pthread_descr) oldstatus; - } - } - while (! sem_compare_and_swap(sem, oldstatus, newstatus)); - if (newstatus & 1) { - /* We got the semaphore. */ - __pthread_set_own_extricate_if(self, 0); - self->p_nextwaiting = NULL; - return 0; - } - /* Wait for sem_post or cancellation */ - suspend(self); - __pthread_set_own_extricate_if(self, 0); - - /* This is a cancellation point */ - if (self->p_canceled && self->p_cancelstate == PTHREAD_CANCEL_ENABLE) { - /* Remove ourselves from the waiting list if we're still on it */ - /* First check if we're at the head of the list. */ - do { - oldstatus = sem->sem_status; - if (oldstatus != (long) self) break; - newstatus = (long) self->p_nextwaiting; - } - while (! sem_compare_and_swap(sem, oldstatus, newstatus)); - /* Now, check if we're somewhere in the list. - There's a race condition with sem_post here, but it does not matter: - the net result is that at the time pthread_exit is called, - self is no longer reachable from sem->sem_status. */ - if (oldstatus != (long) self && (oldstatus & 1) == 0) { - for (th = &(((pthread_descr) oldstatus)->p_nextwaiting); - *th != NULL && *th != (pthread_descr) 1; - th = &((*th)->p_nextwaiting)) { - if (*th == self) { - *th = self->p_nextwaiting; - break; - } - } - } - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - } - } -} - -int __old_sem_trywait(old_sem_t * sem) -{ - long oldstatus, newstatus; - - do { - oldstatus = sem->sem_status; - if ((oldstatus & 1) == 0 || (oldstatus == 1)) { - errno = EAGAIN; - return -1; - } - newstatus = oldstatus - 2; - } - while (! sem_compare_and_swap(sem, oldstatus, newstatus)); - return 0; -} - -int __old_sem_post(old_sem_t * sem) -{ - long oldstatus, newstatus; - - do { - oldstatus = sem->sem_status; - if ((oldstatus & 1) == 0) - newstatus = 3; - else { - if (oldstatus >= SEM_VALUE_MAX) { - /* Overflow */ - errno = ERANGE; - return -1; - } - newstatus = oldstatus + 2; - } - } - while (! sem_compare_and_swap(sem, oldstatus, newstatus)); - if ((oldstatus & 1) == 0) - sem_restart_list((pthread_descr) oldstatus); - return 0; -} - -int __old_sem_getvalue(old_sem_t * sem, int * sval) -{ - long status = sem->sem_status; - if (status & 1) - *sval = (int)((unsigned long) status >> 1); - else - *sval = 0; - return 0; -} - -int __old_sem_destroy(old_sem_t * sem) -{ - if ((sem->sem_status & 1) == 0) { - errno = EBUSY; - return -1; - } - return 0; -} - -/* Auxiliary function for restarting all threads on a waiting list, - in priority order. */ - -static void sem_restart_list(pthread_descr waiting) -{ - pthread_descr th, towake, *p; - - /* Sort list of waiting threads by decreasing priority (insertion sort) */ - towake = NULL; - while (waiting != (pthread_descr) 1) { - th = waiting; - waiting = waiting->p_nextwaiting; - p = &towake; - while (*p != NULL && th->p_priority < (*p)->p_priority) - p = &((*p)->p_nextwaiting); - th->p_nextwaiting = *p; - *p = th; - } - /* Wake up threads in priority order */ - while (towake != NULL) { - th = towake; - towake = towake->p_nextwaiting; - th->p_nextwaiting = NULL; - restart(th); - } -} - -compat_symbol (libpthread, __old_sem_init, sem_init, GLIBC_2_0); -compat_symbol (libpthread, __old_sem_wait, sem_wait, GLIBC_2_0); -compat_symbol (libpthread, __old_sem_trywait, sem_trywait, GLIBC_2_0); -compat_symbol (libpthread, __old_sem_post, sem_post, GLIBC_2_0); -compat_symbol (libpthread, __old_sem_getvalue, sem_getvalue, GLIBC_2_0); -compat_symbol (libpthread, __old_sem_destroy, sem_destroy, GLIBC_2_0); - -#endif diff --git a/newlib/libc/sys/linux/linuxthreads/posix-timer.h b/newlib/libc/sys/linux/linuxthreads/posix-timer.h deleted file mode 100644 index 0596c18f4..000000000 --- a/newlib/libc/sys/linux/linuxthreads/posix-timer.h +++ /dev/null @@ -1,210 +0,0 @@ -/* Definitions for POSIX timer implementation on top of LinuxThreads. - Copyright (C) 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Kaz Kylheku <kaz@ashi.footprints.net>. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <limits.h> -#include <signal.h> -#include <linux/time.h> - -/* Double linked list. */ -struct list_links -{ - struct list_links *next; - struct list_links *prev; -}; - - -/* Forward declaration. */ -struct timer_node; - - -/* Definitions for an internal thread of the POSIX timer implementation. */ -struct thread_node -{ - struct list_links links; - pthread_attr_t attr; - pthread_t id; - unsigned int exists; - struct list_links timer_queue; - pthread_cond_t cond; - struct timer_node *current_timer; - pthread_t captured; - clockid_t clock_id; -}; - - -/* Internal representation of a timer. */ -struct timer_node -{ - struct list_links links; - struct sigevent event; - clockid_t clock; - struct itimerspec value; - struct timespec expirytime; - pthread_attr_t attr; - unsigned int abstime; - unsigned int armed; - enum { - TIMER_FREE, TIMER_INUSE, TIMER_DELETED - } inuse; - struct thread_node *thread; - pid_t creator_pid; - int refcount; -}; - - -/* Static array with the structures for all the timers. */ -extern struct timer_node __timer_array[TIMER_MAX]; - -/* Global lock to protect operation on the lists. */ -extern pthread_mutex_t __timer_mutex; - -/* Variable to protext initialization. */ -extern pthread_once_t __timer_init_once_control; - -/* Nonzero if initialization of timer implementation failed. */ -extern int __timer_init_failed; - -/* Nodes for the threads used to deliver signals. */ -/* A distinct thread is used for each clock type. */ - -extern struct thread_node __timer_signal_thread_rclk; -#ifdef _POSIX_CPUTIME -extern struct thread_node __timer_signal_thread_pclk; -#endif -#ifdef _POSIX_THREAD_CPUTIME -extern struct thread_node __timer_signal_thread_tclk; -#endif - - -/* Return pointer to timer structure corresponding to ID. */ -static inline struct timer_node * -timer_id2ptr (timer_t timerid) -{ - if (timerid >= 0 && timerid < TIMER_MAX) - return &__timer_array[timerid]; - - return NULL; -} - -/* Return ID of TIMER. */ -static inline int -timer_ptr2id (struct timer_node *timer) -{ - return timer - __timer_array; -} - -/* Check whether timer is valid; global mutex must be held. */ -static inline int -timer_valid (struct timer_node *timer) -{ - return timer && timer->inuse == TIMER_INUSE; -} - -/* Timer refcount functions; need global mutex. */ -extern void __timer_dealloc (struct timer_node *timer); - -static inline void -timer_addref (struct timer_node *timer) -{ - timer->refcount++; -} - -static inline void -timer_delref (struct timer_node *timer) -{ - if (--timer->refcount == 0) - __timer_dealloc (timer); -} - -/* Timespec helper routines. */ -static inline int -timespec_compare (const struct timespec *left, const struct timespec *right) -{ - if (left->tv_sec < right->tv_sec) - return -1; - if (left->tv_sec > right->tv_sec) - return 1; - - if (left->tv_nsec < right->tv_nsec) - return -1; - if (left->tv_nsec > right->tv_nsec) - return 1; - - return 0; -} - -static inline void -timespec_add (struct timespec *sum, const struct timespec *left, - const struct timespec *right) -{ - sum->tv_sec = left->tv_sec + right->tv_sec; - sum->tv_nsec = left->tv_nsec + right->tv_nsec; - - if (sum->tv_nsec >= 1000000000) - { - ++sum->tv_sec; - sum->tv_nsec -= 1000000000; - } -} - -static inline void -timespec_sub (struct timespec *diff, const struct timespec *left, - const struct timespec *right) -{ - diff->tv_sec = left->tv_sec - right->tv_sec; - diff->tv_nsec = left->tv_nsec - right->tv_nsec; - - if (diff->tv_nsec < 0) - { - --diff->tv_sec; - diff->tv_nsec += 1000000000; - } -} - - -/* We need one of the list functions in the other modules. */ -static inline void -list_unlink_ip (struct list_links *list) -{ - struct list_links *lnext = list->next, *lprev = list->prev; - - lnext->prev = lprev; - lprev->next = lnext; - - /* The suffix ip means idempotent; list_unlink_ip can be called - * two or more times on the same node. - */ - - list->next = list; - list->prev = list; -} - - -/* Functions in the helper file. */ -extern void __timer_mutex_cancel_handler (void *arg); -extern void __timer_init_once (void); -extern struct timer_node *__timer_alloc (void); -extern int __timer_thread_start (struct thread_node *thread); -extern struct thread_node *__timer_thread_find_matching (const pthread_attr_t *desired_attr, clockid_t); -extern struct thread_node *__timer_thread_alloc (const pthread_attr_t *desired_attr, clockid_t); -extern void __timer_thread_dealloc (struct thread_node *thread); -extern int __timer_thread_queue_timer (struct thread_node *thread, - struct timer_node *insert); -extern void __timer_thread_wakeup (struct thread_node *thread); diff --git a/newlib/libc/sys/linux/linuxthreads/prio.c b/newlib/libc/sys/linux/linuxthreads/prio.c deleted file mode 100644 index 475371176..000000000 --- a/newlib/libc/sys/linux/linuxthreads/prio.c +++ /dev/null @@ -1,65 +0,0 @@ -#include <stddef.h> -#include <unistd.h> -#include <errno.h> -#include "pthread.h" -#include "internals.h" -#include <bits/posix_opt.h> - -#ifndef _POSIX_THREAD_PRIO_PROTECT -int -__pthread_mutexattr_getprotocol (const pthread_mutexattr_t *attr, - int *priority) -{ - errno = ENOSYS; - return ENOSYS; -} -weak_alias(__pthread_mutexattr_getprotocol,pthread_mutexattr_getprotocol) - -int -__pthread_mutexattr_setprotocol (pthread_mutexattr_t *attr, - int priority) -{ - errno = ENOSYS; - return ENOSYS; -} -weak_alias(__pthread_mutexattr_setprotocol,pthread_mutexattr_setprotocol) - -int -__pthread_mutexattr_getprioceiling (const pthread_mutexattr_t *attr, - int *prioceiling) -{ - errno = ENOSYS; - return ENOSYS; -} -weak_alias(__pthread_mutexattr_getprioceiling,pthread_mutexattr_getprioceiling) - -int -__pthread_mutexattr_setprioceiling (pthread_mutexattr_t *attr, - int prioceiling) -{ - errno = ENOSYS; - return ENOSYS; -} -weak_alias(__pthread_mutexattr_setprioceiling,pthread_mutexattr_setprioceiling) -#endif /* !_POSIX_THREAD_PRIO_PROTECT */ - -#if !defined(_POSIX_THREAD_PRIO_PROTECT) && !defined(_POSIX_THREAD_PRIO_INHERIT) -int -__pthread_mutex_getprioceiling (const pthread_mutex_t *mutex, - int *prioceiling) -{ - errno = ENOSYS; - return ENOSYS; -} -weak_alias(__pthread_mutex_getprioceiling,pthread_mutex_getprioceiling) - -int -__pthread_mutex_setprioceiling (pthread_mutex_t *mutex, - int prioceiling, int *oldceiling) -{ - errno = ENOSYS; - return ENOSYS; -} -weak_alias(__pthread_mutex_setprioceiling,pthread_mutex_setprioceiling) -#endif /* !_POSIX_THREAD_PRIO_PROTECT && !_POSIX_THREAD_PRIO_INHERIT) */ - diff --git a/newlib/libc/sys/linux/linuxthreads/proc_service.h b/newlib/libc/sys/linux/linuxthreads/proc_service.h deleted file mode 100644 index 74136c03e..000000000 --- a/newlib/libc/sys/linux/linuxthreads/proc_service.h +++ /dev/null @@ -1,70 +0,0 @@ -/* Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -/* The definitions in this file must correspond to those in the debugger. */ -#include <sys/procfs.h> - -typedef enum -{ - PS_OK, /* generic "call succeeded" */ - PS_ERR, /* generic. */ - PS_BADPID, /* bad process handle */ - PS_BADLID, /* bad lwp identifier */ - PS_BADADDR, /* bad address */ - PS_NOSYM, /* p_lookup() could not find given symbol */ - PS_NOFREGS - /* - * FPU register set not available for given - * lwp - */ -} ps_err_e; - - -struct ps_prochandle; /* user defined. */ - - -extern ps_err_e ps_pdread(struct ps_prochandle *, - psaddr_t, void *, size_t); -extern ps_err_e ps_pdwrite(struct ps_prochandle *, - psaddr_t, const void *, size_t); -extern ps_err_e ps_ptread(struct ps_prochandle *, - psaddr_t, void *, size_t); -extern ps_err_e ps_ptwrite(struct ps_prochandle *, - psaddr_t, const void *, size_t); - -extern ps_err_e ps_pglobal_lookup(struct ps_prochandle *, - const char *object_name, const char *sym_name, psaddr_t *sym_addr); - - -extern ps_err_e ps_lgetregs(struct ps_prochandle *, - lwpid_t, prgregset_t); -extern ps_err_e ps_lsetregs(struct ps_prochandle *, - lwpid_t, const prgregset_t); -extern ps_err_e ps_lgetfpregs(struct ps_prochandle *, - lwpid_t, prfpregset_t *); -extern ps_err_e ps_lsetfpregs(struct ps_prochandle *, - lwpid_t, const prfpregset_t *); - -extern pid_t ps_getpid (struct ps_prochandle *); - - -extern ps_err_e ps_pstop (const struct ps_prochandle *); -extern ps_err_e ps_pcontinue (const struct ps_prochandle *); - -extern ps_err_e ps_lstop (const struct ps_prochandle *, lwpid_t); -extern ps_err_e ps_lcontinue (const struct ps_prochandle *, lwpid_t); diff --git a/newlib/libc/sys/linux/linuxthreads/pt-machine.c b/newlib/libc/sys/linux/linuxthreads/pt-machine.c deleted file mode 100644 index f6298c47a..000000000 --- a/newlib/libc/sys/linux/linuxthreads/pt-machine.c +++ /dev/null @@ -1,25 +0,0 @@ -/* "Instantiation of machine-dependent pthreads inline functions. - Copyright (C) 1998 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#define PT_EI - -extern long int testandset (int *spinlock); -extern int __compare_and_swap (long int *p, long int oldval, long int newval); - -#include <pt-machine.h> diff --git a/newlib/libc/sys/linux/linuxthreads/ptclock_gettime.c b/newlib/libc/sys/linux/linuxthreads/ptclock_gettime.c deleted file mode 100644 index 3323edbcd..000000000 --- a/newlib/libc/sys/linux/linuxthreads/ptclock_gettime.c +++ /dev/null @@ -1,46 +0,0 @@ -/* Copyright (C) 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <time.h> -#include <libc-internal.h> -#include "internals.h" - - -#if HP_TIMING_AVAIL -int -__pthread_clock_gettime (hp_timing_t freq, struct timespec *tp) -{ - hp_timing_t tsc; - pthread_descr self = thread_self (); - - /* Get the current counter. */ - HP_TIMING_NOW (tsc); - - /* Compute the offset since the start time of the process. */ - tsc -= THREAD_GETMEM (self, p_cpuclock_offset); - - /* Compute the seconds. */ - tp->tv_sec = tsc / freq; - - /* And the nanoseconds. This computation should be stable until - we get machines with about 16GHz frequency. */ - tp->tv_nsec = ((tsc % freq) * 1000000000ull) / freq; - - return 0; -} -#endif diff --git a/newlib/libc/sys/linux/linuxthreads/ptclock_settime.c b/newlib/libc/sys/linux/linuxthreads/ptclock_settime.c deleted file mode 100644 index e293e0dfb..000000000 --- a/newlib/libc/sys/linux/linuxthreads/ptclock_settime.c +++ /dev/null @@ -1,33 +0,0 @@ -/* Copyright (C) 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <time.h> -#include <libc-internal.h> -#include "internals.h" - - -#if HP_TIMING_AVAIL -void -__pthread_clock_settime (hp_timing_t offset) -{ - pthread_descr self = thread_self (); - - /* Compute the offset since the start time of the process. */ - THREAD_SETMEM (self, p_cpuclock_offset, offset); -} -#endif diff --git a/newlib/libc/sys/linux/linuxthreads/ptfork.c b/newlib/libc/sys/linux/linuxthreads/ptfork.c deleted file mode 100644 index 6e31b772c..000000000 --- a/newlib/libc/sys/linux/linuxthreads/ptfork.c +++ /dev/null @@ -1,120 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* The "atfork" stuff */ - -#include <errno.h> -#include <stddef.h> -#include <stdlib.h> -#include <unistd.h> -#include "pthread.h" -#include "internals.h" -#include <bits/libc-lock.h> - -struct handler_list { - void (*handler)(void); - struct handler_list * next; -}; - -static pthread_mutex_t pthread_atfork_lock = PTHREAD_MUTEX_INITIALIZER; -static struct handler_list * pthread_atfork_prepare = NULL; -static struct handler_list * pthread_atfork_parent = NULL; -static struct handler_list * pthread_atfork_child = NULL; - -static void pthread_insert_list(struct handler_list ** list, - void (*handler)(void), - struct handler_list * newlist, - int at_end) -{ - if (handler == NULL) return; - if (at_end) { - while(*list != NULL) list = &((*list)->next); - } - newlist->handler = handler; - newlist->next = *list; - *list = newlist; -} - -struct handler_list_block { - struct handler_list prepare, parent, child; -}; - -int __pthread_atfork(void (*prepare)(void), - void (*parent)(void), - void (*child)(void)) -{ - struct handler_list_block * block = - (struct handler_list_block *) malloc(sizeof(struct handler_list_block)); - if (block == NULL) return ENOMEM; - pthread_mutex_lock(&pthread_atfork_lock); - /* "prepare" handlers are called in LIFO */ - pthread_insert_list(&pthread_atfork_prepare, prepare, &block->prepare, 0); - /* "parent" handlers are called in FIFO */ - pthread_insert_list(&pthread_atfork_parent, parent, &block->parent, 1); - /* "child" handlers are called in FIFO */ - pthread_insert_list(&pthread_atfork_child, child, &block->child, 1); - pthread_mutex_unlock(&pthread_atfork_lock); - return 0; -} -strong_alias (__pthread_atfork, pthread_atfork) - -static inline void pthread_call_handlers(struct handler_list * list) -{ - for (/*nothing*/; list != NULL; list = list->next) (list->handler)(); -} - -extern int __libc_fork(void); - -pid_t __fork(void) -{ - pid_t pid; - - pthread_mutex_lock(&pthread_atfork_lock); - - pthread_call_handlers(pthread_atfork_prepare); - __pthread_once_fork_prepare(); - __flockfilelist(); - - pid = __libc_fork(); - - if (pid == 0) { - __pthread_reset_main_thread(); - - __fresetlockfiles(); - __pthread_once_fork_child(); - pthread_call_handlers(pthread_atfork_child); - - pthread_mutex_init(&pthread_atfork_lock, NULL); - } else { - __funlockfilelist(); - __pthread_once_fork_parent(); - pthread_call_handlers(pthread_atfork_parent); - - pthread_mutex_unlock(&pthread_atfork_lock); - } - - return pid; -} - -weak_alias (__fork, fork); - -#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 4 - -pid_t __vfork(void) -{ - return __fork(); -} -weak_alias (__vfork, vfork); - -#endif /* !_ELIX_LEVEL || _ELIX_LEVEL >= 4 */ diff --git a/newlib/libc/sys/linux/linuxthreads/pthread.c b/newlib/libc/sys/linux/linuxthreads/pthread.c deleted file mode 100644 index b42d9d60a..000000000 --- a/newlib/libc/sys/linux/linuxthreads/pthread.c +++ /dev/null @@ -1,1248 +0,0 @@ - -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Thread creation, initialization, and basic low-level routines */ - -#include <errno.h> -#include <stddef.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <fcntl.h> -#include <sys/wait.h> -#include <sys/resource.h> -#include <sys/sysctl.h> -#include <shlib-compat.h> -#include "pthread.h" -#include "internals.h" -#include "spinlock.h" -#include "restart.h" -#include <machine/syscall.h> - -/* for threading we use processes so we require a few EL/IX level 2 and - level 3 syscalls. We only allow this file to see them to preserve - the interface. */ -#if defined(_ELIX_LEVEL) && _ELIX_LEVEL < 3 -static _syscall1_base(int,pipe,int *,filedes) -#endif /* _ELIX_LEVEL < 3 */ - -#if defined(_ELIX_LEVEL) && _ELIX_LEVEL < 2 -static _syscall2_base(int,setrlimit,int,resource,const struct rlimit *,rlp) -int on_exit (void (*fn)(int, void *), void *arg) -{ - register struct _atexit *p; - void (*x)(void) = (void (*)(void))fn; - -/* _REENT_SMALL on_exit() doesn't allow more than the required 32 entries. */ -#ifndef _REENT_SMALL - if ((p = _REENT->_atexit) == NULL) - _REENT->_atexit = p = &_REENT->_atexit0; - if (p->_ind >= _ATEXIT_SIZE) - { - if ((p = (struct _atexit *) malloc (sizeof *p)) == NULL) - return -1; - p->_ind = 0; - p->_fntypes = 0; - p->_next = _REENT->_atexit; - _REENT->_atexit = p; - } -#else - p = &_REENT->_atexit; - if (p->_ind >= _ATEXIT_SIZE) - return -1; -#endif - p->_fntypes |= (1 << p->_ind); - p->_fnargs[p->_ind] = arg; - p->_fns[p->_ind++] = x; - return 0; -} - -#endif /* _ELIX_LEVEL < 2 */ - -/* We need the global/static resolver state here. */ -#include <resolv.h> -#undef _res - -/* FIXME: for now, set up _res here */ -struct __res_state _res; - -/* Sanity check. */ -#if __ASSUME_REALTIME_SIGNALS && !defined __SIGRTMIN -# error "This must not happen; new kernel assumed but old headers" -#endif - -/* These variables are used by the setup code. */ - -/* Descriptor of the initial thread */ - -struct _pthread_descr_struct __pthread_initial_thread = { - { - { - &__pthread_initial_thread /* pthread_descr self */ - } - }, - &__pthread_initial_thread, /* pthread_descr p_nextlive */ - &__pthread_initial_thread, /* pthread_descr p_prevlive */ - NULL, /* pthread_descr p_nextwaiting */ - NULL, /* pthread_descr p_nextlock */ - PTHREAD_THREADS_MAX, /* pthread_t p_tid */ - 0, /* int p_pid */ - 0, /* int p_priority */ - &__pthread_handles[0].h_lock, /* struct _pthread_fastlock * p_lock */ - 0, /* int p_signal */ - NULL, /* sigjmp_buf * p_signal_buf */ - NULL, /* sigjmp_buf * p_cancel_buf */ - 0, /* char p_terminated */ - 0, /* char p_detached */ - 0, /* char p_exited */ - NULL, /* void * p_retval */ - 0, /* int p_retval */ - NULL, /* pthread_descr p_joining */ - NULL, /* struct _pthread_cleanup_buffer * p_cleanup */ - 0, /* char p_cancelstate */ - 0, /* char p_canceltype */ - 0, /* char p_canceled */ - &__pthread_initial_thread.p_reent, /* struct _reent *p_reentp */ - _REENT_INIT(__pthread_initial_thread.p_reent), /* struct _reent p_reent */ - NULL, /* int *p_h_errnop */ - 0, /* int p_h_errno */ - NULL, /* char * p_in_sighandler */ - 0, /* char p_sigwaiting */ - PTHREAD_START_ARGS_INITIALIZER(NULL), - /* struct pthread_start_args p_start_args */ - {NULL}, /* void ** p_specific[PTHREAD_KEY_1STLEVEL_SIZE] */ - {NULL}, /* void * p_libc_specific[_LIBC_TSD_KEY_N] */ - 1, /* int p_userstack */ - NULL, /* void * p_guardaddr */ - 0, /* size_t p_guardsize */ - 0, /* Always index 0 */ - 0, /* int p_report_events */ - {{{0, }}, 0, NULL}, /* td_eventbuf_t p_eventbuf */ - __ATOMIC_INITIALIZER, /* struct pthread_atomic p_resume_count */ - 0, /* char p_woken_by_cancel */ - 0, /* char p_condvar_avail */ - 0, /* char p_sem_avail */ - NULL, /* struct pthread_extricate_if *p_extricate */ - NULL, /* pthread_readlock_info *p_readlock_list; */ - NULL, /* pthread_readlock_info *p_readlock_free; */ - 0 /* int p_untracked_readlock_count; */ -}; - -/* Descriptor of the manager thread; none of this is used but the error - variables, the p_pid and p_priority fields, - and the address for identification. */ - -struct _pthread_descr_struct __pthread_manager_thread = { - { - { - &__pthread_manager_thread /* pthread_descr self */ - } - }, - NULL, /* pthread_descr p_nextlive */ - NULL, /* pthread_descr p_prevlive */ - NULL, /* pthread_descr p_nextwaiting */ - NULL, /* pthread_descr p_nextlock */ - 0, /* int p_tid */ - 0, /* int p_pid */ - 0, /* int p_priority */ - &__pthread_handles[1].h_lock, /* struct _pthread_fastlock * p_lock */ - 0, /* int p_signal */ - NULL, /* sigjmp_buf * p_signal_buf */ - NULL, /* sigjmp_buf * p_cancel_buf */ - 0, /* char p_terminated */ - 0, /* char p_detached */ - 0, /* char p_exited */ - NULL, /* void * p_retval */ - 0, /* int p_retval */ - NULL, /* pthread_descr p_joining */ - NULL, /* struct _pthread_cleanup_buffer * p_cleanup */ - 0, /* char p_cancelstate */ - 0, /* char p_canceltype */ - 0, /* char p_canceled */ - &__pthread_manager_thread.p_reent, /* struct _reent *p_reentp */ - _REENT_INIT(__pthread_manager_thread.p_reent), /* struct _reent p_reent */ - NULL, /* int *p_h_errnop */ - 0, /* int p_h_errno */ - NULL, /* char * p_in_sighandler */ - 0, /* char p_sigwaiting */ - PTHREAD_START_ARGS_INITIALIZER(__pthread_manager), - /* struct pthread_start_args p_start_args */ - {NULL}, /* void ** p_specific[PTHREAD_KEY_1STLEVEL_SIZE] */ - {NULL}, /* void * p_libc_specific[_LIBC_TSD_KEY_N] */ - 0, /* int p_userstack */ - NULL, /* void * p_guardaddr */ - 0, /* size_t p_guardsize */ - 1, /* Always index 1 */ - 0, /* int p_report_events */ - {{{0, }}, 0, NULL}, /* td_eventbuf_t p_eventbuf */ - __ATOMIC_INITIALIZER, /* struct pthread_atomic p_resume_count */ - 0, /* char p_woken_by_cancel */ - 0, /* char p_condvar_avail */ - 0, /* char p_sem_avail */ - NULL, /* struct pthread_extricate_if *p_extricate */ - NULL, /* pthread_readlock_info *p_readlock_list; */ - NULL, /* pthread_readlock_info *p_readlock_free; */ - 0 /* int p_untracked_readlock_count; */ -}; - -/* Pointer to the main thread (the father of the thread manager thread) */ -/* Originally, this is the initial thread, but this changes after fork() */ - -pthread_descr __pthread_main_thread = &__pthread_initial_thread; - -/* Limit between the stack of the initial thread (above) and the - stacks of other threads (below). Aligned on a STACK_SIZE boundary. */ - -char *__pthread_initial_thread_bos; - -/* File descriptor for sending requests to the thread manager. */ -/* Initially -1, meaning that the thread manager is not running. */ - -int __pthread_manager_request = -1; - -/* Other end of the pipe for sending requests to the thread manager. */ - -int __pthread_manager_reader; - -/* Limits of the thread manager stack */ - -char *__pthread_manager_thread_bos; -char *__pthread_manager_thread_tos; - -/* For process-wide exit() */ - -int __pthread_exit_requested; -int __pthread_exit_code; - -/* Maximum stack size. */ -size_t __pthread_max_stacksize; - -/* Nozero if the machine has more than one processor. */ -int __pthread_smp_kernel; - - -#if !__ASSUME_REALTIME_SIGNALS -/* Pointers that select new or old suspend/resume functions - based on availability of rt signals. */ - -void (*__pthread_restart)(pthread_descr) = __pthread_restart_old; -void (*__pthread_suspend)(pthread_descr) = __pthread_suspend_old; -int (*__pthread_timedsuspend)(pthread_descr, const struct timespec *) = __pthread_timedsuspend_old; -#endif /* __ASSUME_REALTIME_SIGNALS */ - -/* Communicate relevant LinuxThreads constants to gdb */ - -const int __pthread_threads_max = PTHREAD_THREADS_MAX; -const int __pthread_sizeof_handle = sizeof(struct pthread_handle_struct); -const int __pthread_offsetof_descr = offsetof(struct pthread_handle_struct, - h_descr); -const int __pthread_offsetof_pid = offsetof(struct _pthread_descr_struct, - p_pid); -const int __linuxthreads_pthread_sizeof_descr - = sizeof(struct _pthread_descr_struct); - -/* Forward declarations */ - -static void pthread_onexit_process(int retcode, void *arg); -#ifndef HAVE_Z_NODELETE -static void pthread_atexit_process(void *arg, int retcode); -static void pthread_atexit_retcode(void *arg, int retcode); -#endif -static void pthread_handle_sigcancel(int sig); -static void pthread_handle_sigrestart(int sig); -static void pthread_handle_sigdebug(int sig); - -/* CPU clock handling. */ -#if HP_TIMING_AVAIL -extern hp_timing_t _dl_cpuclock_offset; -#endif - -/* Signal numbers used for the communication. - In these variables we keep track of the used variables. If the - platform does not support any real-time signals we will define the - values to some unreasonable value which will signal failing of all - the functions below. */ -#ifndef __SIGRTMIN -static int current_rtmin = -1; -static int current_rtmax = -1; -int __pthread_sig_restart = SIGUSR1; -int __pthread_sig_cancel = SIGUSR2; -int __pthread_sig_debug; -#else -static int current_rtmin; -static int current_rtmax; - -#if __SIGRTMAX - __SIGRTMIN >= 3 -int __pthread_sig_restart = __SIGRTMIN; -int __pthread_sig_cancel = __SIGRTMIN + 1; -int __pthread_sig_debug = __SIGRTMIN + 2; -#else -int __pthread_sig_restart = SIGUSR1; -int __pthread_sig_cancel = SIGUSR2; -int __pthread_sig_debug; -#endif - -static int rtsigs_initialized; - -#if !__ASSUME_REALTIME_SIGNALS -# include "testrtsig.h" -#endif - -static void -init_rtsigs (void) -{ -#if !__ASSUME_REALTIME_SIGNALS - if (__builtin_expect (!kernel_has_rtsig (), 0)) - { - current_rtmin = -1; - current_rtmax = -1; -# if __SIGRTMAX - __SIGRTMIN >= 3 - __pthread_sig_restart = SIGUSR1; - __pthread_sig_cancel = SIGUSR2; - __pthread_sig_debug = 0; -# endif - } - else -#endif /* __ASSUME_REALTIME_SIGNALS */ - { -#if __SIGRTMAX - __SIGRTMIN >= 3 - current_rtmin = __SIGRTMIN + 3; -# if !__ASSUME_REALTIME_SIGNALS - __pthread_restart = __pthread_restart_new; - __pthread_suspend = __pthread_wait_for_restart_signal; - __pthread_timedsuspend = __pthread_timedsuspend_new; -# endif /* __ASSUME_REALTIME_SIGNALS */ -#else - current_rtmin = __SIGRTMIN; -#endif - - current_rtmax = __SIGRTMAX; - } - - rtsigs_initialized = 1; -} -#endif - -/* Return number of available real-time signal with highest priority. */ -int -__libc_current_sigrtmin (void) -{ -#ifdef __SIGRTMIN - if (__builtin_expect (!rtsigs_initialized, 0)) - init_rtsigs (); -#endif - return current_rtmin; -} - -/* Return number of available real-time signal with lowest priority. */ -int -__libc_current_sigrtmax (void) -{ -#ifdef __SIGRTMIN - if (__builtin_expect (!rtsigs_initialized, 0)) - init_rtsigs (); -#endif - return current_rtmax; -} - -/* Allocate real-time signal with highest/lowest available - priority. Please note that we don't use a lock since we assume - this function to be called at program start. */ -int -__libc_allocate_rtsig (int high) -{ -#ifndef __SIGRTMIN - return -1; -#else - if (__builtin_expect (!rtsigs_initialized, 0)) - init_rtsigs (); - if (__builtin_expect (current_rtmin == -1, 0) - || __builtin_expect (current_rtmin > current_rtmax, 0)) - /* We don't have anymore signal available. */ - return -1; - - return high ? current_rtmin++ : current_rtmax--; -#endif -} - -/* The function we use to get the kernel revision. */ -extern int __sysctl (int *name, int nlen, void *oldval, size_t *oldlenp, - void *newval, size_t newlen); - -/* Test whether the machine has more than one processor. This is not the - best test but good enough. More complicated tests would require `malloc' - which is not available at that time. */ -static int -is_smp_system (void) -{ - static const int sysctl_args[] = { CTL_KERN, KERN_VERSION }; - char buf[512]; - size_t reslen = sizeof (buf); - - /* Try reading the number using `sysctl' first. */ - if (__sysctl ((int *) sysctl_args, - sizeof (sysctl_args) / sizeof (sysctl_args[0]), - buf, &reslen, NULL, 0) < 0) - { - /* This was not successful. Now try reading the /proc filesystem. */ - int fd = __open ("/proc/sys/kernel/version", O_RDONLY); - if (__builtin_expect (fd, 0) == -1 - || (reslen = __read (fd, buf, sizeof (buf))) <= 0) - /* This also didn't work. We give up and say it's a UP machine. */ - buf[0] = '\0'; - - __close (fd); - } - - return strstr (buf, "SMP") != NULL; -} - - -/* Initialize the pthread library. - Initialization is split in two functions: - - a constructor function that blocks the __pthread_sig_restart signal - (must do this very early, since the program could capture the signal - mask with e.g. sigsetjmp before creating the first thread); - - a regular function called from pthread_create when needed. */ - -static void pthread_initialize(void) __attribute__((constructor)); - -#ifndef HAVE_Z_NODELETE -extern void *__dso_handle __attribute__ ((weak)); -#endif - - -/* Do some minimal initialization which has to be done during the - startup of the C library. */ -void -__pthread_initialize_minimal(void) -{ - /* If we have special thread_self processing, initialize that for the - main thread now. */ -#ifdef INIT_THREAD_SELF - INIT_THREAD_SELF(&__pthread_initial_thread, 0); -#endif -#if HP_TIMING_AVAIL - __pthread_initial_thread.p_cpuclock_offset = _dl_cpuclock_offset; -#endif -} - - -void -__pthread_init_max_stacksize(void) -{ - struct rlimit limit; - size_t max_stack; - - getrlimit(RLIMIT_STACK, &limit); -#ifdef FLOATING_STACKS - if (limit.rlim_cur == RLIM_INFINITY) - limit.rlim_cur = ARCH_STACK_MAX_SIZE; -# ifdef NEED_SEPARATE_REGISTER_STACK - max_stack = limit.rlim_cur / 2; -# else - max_stack = limit.rlim_cur; -# endif -#else - /* Play with the stack size limit to make sure that no stack ever grows - beyond STACK_SIZE minus one page (to act as a guard page). */ -# ifdef NEED_SEPARATE_REGISTER_STACK - /* STACK_SIZE bytes hold both the main stack and register backing - store. The rlimit value applies to each individually. */ - max_stack = STACK_SIZE/2 - __getpagesize (); -# else - max_stack = STACK_SIZE - __getpagesize(); -# endif - if (limit.rlim_cur > max_stack) { - limit.rlim_cur = max_stack; - __libc_setrlimit(RLIMIT_STACK, &limit); - } -#endif - __pthread_max_stacksize = max_stack; -} - - -static void pthread_initialize(void) -{ - struct sigaction sa; - sigset_t mask; - - /* If already done (e.g. by a constructor called earlier!), bail out */ - if (__pthread_initial_thread_bos != NULL) return; -#ifdef TEST_FOR_COMPARE_AND_SWAP - /* Test if compare-and-swap is available */ - __pthread_has_cas = compare_and_swap_is_available(); -#endif -#ifdef FLOATING_STACKS - /* We don't need to know the bottom of the stack. Give the pointer some - value to signal that initialization happened. */ - __pthread_initial_thread_bos = (void *) -1l; -#else - /* Determine stack size limits . */ - __pthread_init_max_stacksize (); -# ifdef _STACK_GROWS_UP - /* The initial thread already has all the stack it needs */ - __pthread_initial_thread_bos = (char *) - ((long)CURRENT_STACK_FRAME &~ (STACK_SIZE - 1)); -# else - /* For the initial stack, reserve at least STACK_SIZE bytes of stack - below the current stack address, and align that on a - STACK_SIZE boundary. */ - __pthread_initial_thread_bos = - (char *)(((long)CURRENT_STACK_FRAME - 2 * STACK_SIZE) & ~(STACK_SIZE - 1)); -# endif -#endif - /* Update the descriptor for the initial thread. */ - __pthread_initial_thread.p_pid = __getpid(); - /* Likewise for the resolver state _res. */ - __pthread_initial_thread.p_resp = &_res; -#ifdef __SIGRTMIN - /* Initialize real-time signals. */ - init_rtsigs (); -#endif - /* Setup signal handlers for the initial thread. - Since signal handlers are shared between threads, these settings - will be inherited by all other threads. */ - sa.sa_handler = pthread_handle_sigrestart; - sigemptyset(&sa.sa_mask); - sa.sa_flags = 0; - __libc_sigaction(__pthread_sig_restart, &sa, NULL); - sa.sa_handler = pthread_handle_sigcancel; - // sa.sa_flags = 0; - __libc_sigaction(__pthread_sig_cancel, &sa, NULL); - if (__pthread_sig_debug > 0) { - sa.sa_handler = pthread_handle_sigdebug; - sigemptyset(&sa.sa_mask); - // sa.sa_flags = 0; - __libc_sigaction(__pthread_sig_debug, &sa, NULL); - } - /* Initially, block __pthread_sig_restart. Will be unblocked on demand. */ - sigemptyset(&mask); - sigaddset(&mask, __pthread_sig_restart); - sigprocmask(SIG_BLOCK, &mask, NULL); - /* Register an exit function to kill all other threads. */ - /* Do it early so that user-registered atexit functions are called - before pthread_*exit_process. */ -#ifndef HAVE_Z_NODELETE - if (__builtin_expect (&__dso_handle != NULL, 1)) - __cxa_atexit ((void (*) (void *)) pthread_atexit_process, NULL, - __dso_handle); - else -#endif - on_exit (pthread_onexit_process, NULL); - /* How many processors. */ - __pthread_smp_kernel = is_smp_system (); -} - -void __pthread_initialize(void) -{ - pthread_initialize(); -} - -int __pthread_initialize_manager(void) -{ - int manager_pipe[2]; - int pid; - struct pthread_request request; - -#ifndef HAVE_Z_NODELETE - if (__builtin_expect (&__dso_handle != NULL, 1)) - __cxa_atexit ((void (*) (void *)) pthread_atexit_retcode, NULL, - __dso_handle); -#endif - - if (__pthread_max_stacksize == 0) - __pthread_init_max_stacksize (); - /* If basic initialization not done yet (e.g. we're called from a - constructor run before our constructor), do it now */ - if (__pthread_initial_thread_bos == NULL) pthread_initialize(); - /* Setup stack for thread manager */ - __pthread_manager_thread_bos = malloc(THREAD_MANAGER_STACK_SIZE); - if (__pthread_manager_thread_bos == NULL) return -1; - __pthread_manager_thread_tos = - __pthread_manager_thread_bos + THREAD_MANAGER_STACK_SIZE; - /* Setup pipe to communicate with thread manager */ - if (__libc_pipe(manager_pipe) == -1) { - free(__pthread_manager_thread_bos); - return -1; - } - /* Start the thread manager */ - pid = 0; - if (__builtin_expect (__pthread_initial_thread.p_report_events, 0)) - { - /* It's a bit more complicated. We have to report the creation of - the manager thread. */ - int idx = __td_eventword (TD_CREATE); - uint32_t mask = __td_eventmask (TD_CREATE); - - if ((mask & (__pthread_threads_events.event_bits[idx] - | __pthread_initial_thread.p_eventbuf.eventmask.event_bits[idx])) - != 0) - { - __pthread_lock(__pthread_manager_thread.p_lock, NULL); - -#ifdef NEED_SEPARATE_REGISTER_STACK - pid = __clone2(__pthread_manager_event, - (void **) __pthread_manager_thread_bos, - THREAD_MANAGER_STACK_SIZE, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, - (void *)(long)manager_pipe[0]); -#elif _STACK_GROWS_UP - pid = __clone(__pthread_manager_event, - (void **) __pthread_manager_thread_bos, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, - (void *)(long)manager_pipe[0]); -#else - pid = __clone(__pthread_manager_event, - (void **) __pthread_manager_thread_tos, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, - (void *)(long)manager_pipe[0]); -#endif - - if (pid != -1) - { - /* Now fill in the information about the new thread in - the newly created thread's data structure. We cannot let - the new thread do this since we don't know whether it was - already scheduled when we send the event. */ - __pthread_manager_thread.p_eventbuf.eventdata = - &__pthread_manager_thread; - __pthread_manager_thread.p_eventbuf.eventnum = TD_CREATE; - __pthread_last_event = &__pthread_manager_thread; - __pthread_manager_thread.p_tid = 2* PTHREAD_THREADS_MAX + 1; - __pthread_manager_thread.p_pid = pid; - - /* Now call the function which signals the event. */ - __linuxthreads_create_event (); - } - - /* Now restart the thread. */ - __pthread_unlock(__pthread_manager_thread.p_lock); - } - } - - if (__builtin_expect (pid, 0) == 0) - { -#ifdef NEED_SEPARATE_REGISTER_STACK - pid = __clone2(__pthread_manager, (void **) __pthread_manager_thread_bos, - THREAD_MANAGER_STACK_SIZE, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, - (void *)(long)manager_pipe[0]); -#elif _STACK_GROWS_UP - pid = __clone(__pthread_manager, (void **) __pthread_manager_thread_bos, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, - (void *)(long)manager_pipe[0]); -#else - pid = __clone(__pthread_manager, (void **) __pthread_manager_thread_tos, - CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND, - (void *)(long)manager_pipe[0]); -#endif - } - if (__builtin_expect (pid, 0) == -1) { - free(__pthread_manager_thread_bos); - __libc_close(manager_pipe[0]); - __libc_close(manager_pipe[1]); - return -1; - } - __pthread_manager_request = manager_pipe[1]; /* writing end */ - __pthread_manager_reader = manager_pipe[0]; /* reading end */ - __pthread_manager_thread.p_tid = 2* PTHREAD_THREADS_MAX + 1; - __pthread_manager_thread.p_pid = pid; - /* Make gdb aware of new thread manager */ - if (__builtin_expect (__pthread_threads_debug, 0) && __pthread_sig_debug > 0) - { - raise(__pthread_sig_debug); - /* We suspend ourself and gdb will wake us up when it is - ready to handle us. */ - __pthread_wait_for_restart_signal(thread_self()); - } - /* Synchronize debugging of the thread manager */ - request.req_kind = REQ_DEBUG; - TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request, - (char *) &request, sizeof(request))); - return 0; -} - -/* Thread creation */ - -int __pthread_create_2_1(pthread_t *thread, const pthread_attr_t *attr, - void * (*start_routine)(void *), void *arg) -{ - pthread_descr self = thread_self(); - struct pthread_request request; - int retval; - if (__builtin_expect (__pthread_manager_request, 0) < 0) { - if (__pthread_initialize_manager() < 0) return EAGAIN; - } - request.req_thread = self; - request.req_kind = REQ_CREATE; - request.req_args.create.attr = attr; - request.req_args.create.fn = start_routine; - request.req_args.create.arg = arg; - sigprocmask(SIG_SETMASK, (const sigset_t *) NULL, - &request.req_args.create.mask); - TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request, - (char *) &request, sizeof(request))); - suspend(self); - retval = THREAD_GETMEM(self, p_retcode); - if (__builtin_expect (retval, 0) == 0) - *thread = (pthread_t) THREAD_GETMEM(self, p_retval); - return retval; -} - -versioned_symbol (libpthread, __pthread_create_2_1, pthread_create, GLIBC_2_1); - -#if SHLIB_COMPAT (libpthread, GLIBC_2_0, GLIBC_2_1) - -int __pthread_create_2_0(pthread_t *thread, const pthread_attr_t *attr, - void * (*start_routine)(void *), void *arg) -{ - /* The ATTR attribute is not really of type `pthread_attr_t *'. It has - the old size and access to the new members might crash the program. - We convert the struct now. */ - pthread_attr_t new_attr; - - if (attr != NULL) - { - size_t ps = __getpagesize (); - - memcpy (&new_attr, attr, - (size_t) &(((pthread_attr_t*)NULL)->__guardsize)); - new_attr.__guardsize = ps; - new_attr.__stackaddr_set = 0; - new_attr.__stackaddr = NULL; - new_attr.__stacksize = STACK_SIZE - ps; - attr = &new_attr; - } - return __pthread_create_2_1 (thread, attr, start_routine, arg); -} -compat_symbol (libpthread, __pthread_create_2_0, pthread_create, GLIBC_2_0); -#endif - -/* Simple operations on thread identifiers */ - -pthread_t pthread_self(void) -{ - pthread_descr self = thread_self(); - return THREAD_GETMEM(self, p_tid); -} - -int pthread_equal(pthread_t thread1, pthread_t thread2) -{ - return thread1 == thread2; -} - -/* Helper function for thread_self in the case of user-provided stacks */ - -#ifndef THREAD_SELF - -pthread_descr __pthread_find_self(void) -{ - char * sp = CURRENT_STACK_FRAME; - pthread_handle h; - - /* __pthread_handles[0] is the initial thread, __pthread_handles[1] is - the manager threads handled specially in thread_self(), so start at 2 */ - h = __pthread_handles + 2; - while (! (sp <= (char *) h->h_descr && sp >= h->h_bottom)) h++; - return h->h_descr; -} - -#else - -static pthread_descr thread_self_stack(void) -{ - char *sp = CURRENT_STACK_FRAME; - pthread_handle h; - - if (sp >= __pthread_manager_thread_bos && sp < __pthread_manager_thread_tos) - return &__pthread_manager_thread; - h = __pthread_handles + 2; - while (! (sp <= (char *) h->h_descr && sp >= h->h_bottom)) - h++; - return h->h_descr; -} - -#endif - -/* Thread scheduling */ - -int pthread_setschedparam(pthread_t thread, int policy, - const struct sched_param *param) -{ - pthread_handle handle = thread_handle(thread); - pthread_descr th; - - __pthread_lock(&handle->h_lock, NULL); - if (__builtin_expect (invalid_handle(handle, thread), 0)) { - __pthread_unlock(&handle->h_lock); - return ESRCH; - } - th = handle->h_descr; - if (__builtin_expect (__sched_setscheduler(th->p_pid, policy, param) == -1, - 0)) { - __pthread_unlock(&handle->h_lock); - return errno; - } - th->p_priority = policy == SCHED_OTHER ? 0 : param->sched_priority; - __pthread_unlock(&handle->h_lock); - if (__pthread_manager_request >= 0) - __pthread_manager_adjust_prio(th->p_priority); - return 0; -} - -int pthread_getschedparam(pthread_t thread, int *policy, - struct sched_param *param) -{ - pthread_handle handle = thread_handle(thread); - int pid, pol; - - __pthread_lock(&handle->h_lock, NULL); - if (__builtin_expect (invalid_handle(handle, thread), 0)) { - __pthread_unlock(&handle->h_lock); - return ESRCH; - } - pid = handle->h_descr->p_pid; - __pthread_unlock(&handle->h_lock); - pol = __sched_getscheduler(pid); - if (__builtin_expect (pol, 0) == -1) return errno; - if (__sched_getparam(pid, param) == -1) return errno; - *policy = pol; - return 0; -} - -int __pthread_yield (void) -{ - /* For now this is equivalent with the POSIX call. */ - return sched_yield (); -} -weak_alias (__pthread_yield, pthread_yield) - -/* Process-wide exit() request */ - -static void pthread_onexit_process(int retcode, void *arg) -{ - if (__builtin_expect (__pthread_manager_request, 0) >= 0) { - struct pthread_request request; - pthread_descr self = thread_self(); - - request.req_thread = self; - request.req_kind = REQ_PROCESS_EXIT; - request.req_args.exit.code = retcode; - TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request, - (char *) &request, sizeof(request))); - suspend(self); - /* Main thread should accumulate times for thread manager and its - children, so that timings for main thread account for all threads. */ - if (self == __pthread_main_thread) - { - __waitpid(__pthread_manager_thread.p_pid, NULL, __WCLONE); - /* Since all threads have been asynchronously terminated - (possibly holding locks), free cannot be used any more. */ - /*free (__pthread_manager_thread_bos);*/ - __pthread_manager_thread_bos = __pthread_manager_thread_tos = NULL; - } - } -} - -#ifndef HAVE_Z_NODELETE -static int __pthread_atexit_retcode; - -static void pthread_atexit_process(void *arg, int retcode) -{ - pthread_onexit_process (retcode ?: __pthread_atexit_retcode, arg); -} - -static void pthread_atexit_retcode(void *arg, int retcode) -{ - __pthread_atexit_retcode = retcode; -} -#endif - -/* The handler for the RESTART signal just records the signal received - in the thread descriptor, and optionally performs a siglongjmp - (for pthread_cond_timedwait). */ - -static void pthread_handle_sigrestart(int sig) -{ - pthread_descr self = thread_self(); - THREAD_SETMEM(self, p_signal, sig); - if (THREAD_GETMEM(self, p_signal_jmp) != NULL) - siglongjmp(*THREAD_GETMEM(self, p_signal_jmp), 1); -} - -/* The handler for the CANCEL signal checks for cancellation - (in asynchronous mode), for process-wide exit and exec requests. - For the thread manager thread, redirect the signal to - __pthread_manager_sighandler. */ - -static void pthread_handle_sigcancel(int sig) -{ - pthread_descr self = thread_self(); - sigjmp_buf * jmpbuf; - - if (self == &__pthread_manager_thread) - { -#ifdef THREAD_SELF - /* A new thread might get a cancel signal before it is fully - initialized, so that the thread register might still point to the - manager thread. Double check that this is really the manager - thread. */ - pthread_descr real_self = thread_self_stack(); - if (real_self == &__pthread_manager_thread) - { - __pthread_manager_sighandler(sig); - return; - } - /* Oops, thread_self() isn't working yet.. */ - self = real_self; -# ifdef INIT_THREAD_SELF - INIT_THREAD_SELF(self, self->p_nr); -# endif -#else - __pthread_manager_sighandler(sig); - return; -#endif - } - if (__builtin_expect (__pthread_exit_requested, 0)) { - /* Main thread should accumulate times for thread manager and its - children, so that timings for main thread account for all threads. */ - if (self == __pthread_main_thread) - __waitpid(__pthread_manager_thread.p_pid, NULL, __WCLONE); - _exit(__pthread_exit_code); - } - if (__builtin_expect (THREAD_GETMEM(self, p_canceled), 0) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE) { - if (THREAD_GETMEM(self, p_canceltype) == PTHREAD_CANCEL_ASYNCHRONOUS) - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - jmpbuf = THREAD_GETMEM(self, p_cancel_jmp); - if (jmpbuf != NULL) { - THREAD_SETMEM(self, p_cancel_jmp, NULL); - siglongjmp(*jmpbuf, 1); - } - } -} - -/* Handler for the DEBUG signal. - The debugging strategy is as follows: - On reception of a REQ_DEBUG request (sent by new threads created to - the thread manager under debugging mode), the thread manager throws - __pthread_sig_debug to itself. The debugger (if active) intercepts - this signal, takes into account new threads and continue execution - of the thread manager by propagating the signal because it doesn't - know what it is specifically done for. In the current implementation, - the thread manager simply discards it. */ - -static void pthread_handle_sigdebug(int sig) -{ - /* Nothing */ -} - -/* Reset the state of the thread machinery after a fork(). - Close the pipe used for requests and set the main thread to the forked - thread. - Notice that we can't free the stack segments, as the forked thread - may hold pointers into them. */ - -void __pthread_reset_main_thread(void) -{ - pthread_descr self = thread_self(); - struct rlimit limit; - - if (__pthread_manager_request != -1) { - /* Free the thread manager stack */ - free(__pthread_manager_thread_bos); - __pthread_manager_thread_bos = __pthread_manager_thread_tos = NULL; - /* Close the two ends of the pipe */ - __libc_close(__pthread_manager_request); - __libc_close(__pthread_manager_reader); - __pthread_manager_request = __pthread_manager_reader = -1; - } - - /* Update the pid of the main thread */ - THREAD_SETMEM(self, p_pid, __getpid()); - /* Make the forked thread the main thread */ - __pthread_main_thread = self; - THREAD_SETMEM(self, p_nextlive, self); - THREAD_SETMEM(self, p_prevlive, self); - /* Now this thread modifies the global variables. */ - THREAD_SETMEM(self, p_resp, &_res); - - if (getrlimit (RLIMIT_STACK, &limit) == 0 - && limit.rlim_cur != limit.rlim_max) { - limit.rlim_cur = limit.rlim_max; - __libc_setrlimit(RLIMIT_STACK, &limit); - } -} - -/* Process-wide exec() request */ - -#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 2 - -void __pthread_kill_other_threads_np(void) -{ - struct sigaction sa; - /* Terminate all other threads and thread manager */ - pthread_onexit_process(0, NULL); - /* Make current thread the main thread in case the calling thread - changes its mind, does not exec(), and creates new threads instead. */ - __pthread_reset_main_thread(); - - /* Reset the signal handlers behaviour for the signals the - implementation uses since this would be passed to the new - process. */ - sigemptyset(&sa.sa_mask); - sa.sa_flags = 0; - sa.sa_handler = SIG_DFL; - __libc_sigaction(__pthread_sig_restart, &sa, NULL); - __libc_sigaction(__pthread_sig_cancel, &sa, NULL); - if (__pthread_sig_debug > 0) - __libc_sigaction(__pthread_sig_debug, &sa, NULL); -} -weak_alias (__pthread_kill_other_threads_np, pthread_kill_other_threads_np) - -#endif /* !_ELIX_LEVEL || _ELIX_LEVEL >= 2 */ - -/* Concurrency symbol level. */ -static int current_level; - -int __pthread_setconcurrency(int level) -{ - /* We don't do anything unless we have found a useful interpretation. */ - current_level = level; - return 0; -} -weak_alias (__pthread_setconcurrency, pthread_setconcurrency) - -int __pthread_getconcurrency(void) -{ - return current_level; -} -weak_alias (__pthread_getconcurrency, pthread_getconcurrency) - -/* Primitives for controlling thread execution */ - -void __pthread_wait_for_restart_signal(pthread_descr self) -{ - sigset_t mask; - - sigprocmask(SIG_SETMASK, NULL, &mask); /* Get current signal mask */ - sigdelset(&mask, __pthread_sig_restart); /* Unblock the restart signal */ - THREAD_SETMEM(self, p_signal, 0); - do { - sigsuspend(&mask); /* Wait for signal */ - } while (THREAD_GETMEM(self, p_signal) !=__pthread_sig_restart); - - READ_MEMORY_BARRIER(); /* See comment in __pthread_restart_new */ -} - -#if !__ASSUME_REALTIME_SIGNALS -/* The _old variants are for 2.0 and early 2.1 kernels which don't have RT - signals. - On these kernels, we use SIGUSR1 and SIGUSR2 for restart and cancellation. - Since the restart signal does not queue, we use an atomic counter to create - queuing semantics. This is needed to resolve a rare race condition in - pthread_cond_timedwait_relative. */ - -void __pthread_restart_old(pthread_descr th) -{ - if (atomic_increment(&th->p_resume_count) == -1) - kill(th->p_pid, __pthread_sig_restart); -} - -void __pthread_suspend_old(pthread_descr self) -{ - if (atomic_decrement(&self->p_resume_count) <= 0) - __pthread_wait_for_restart_signal(self); -} - -int -__pthread_timedsuspend_old(pthread_descr self, const struct timespec *abstime) -{ - sigset_t unblock, initial_mask; - int was_signalled = 0; - sigjmp_buf jmpbuf; - - if (atomic_decrement(&self->p_resume_count) == 0) { - /* Set up a longjmp handler for the restart signal, unblock - the signal and sleep. */ - - if (sigsetjmp(jmpbuf, 1) == 0) { - THREAD_SETMEM(self, p_signal_jmp, &jmpbuf); - THREAD_SETMEM(self, p_signal, 0); - /* Unblock the restart signal */ - sigemptyset(&unblock); - sigaddset(&unblock, __pthread_sig_restart); - sigprocmask(SIG_UNBLOCK, &unblock, &initial_mask); - - while (1) { - struct timeval now; - struct timespec reltime; - - /* Compute a time offset relative to now. */ - __gettimeofday (&now, NULL); - reltime.tv_nsec = abstime->tv_nsec - now.tv_usec * 1000; - reltime.tv_sec = abstime->tv_sec - now.tv_sec; - if (reltime.tv_nsec < 0) { - reltime.tv_nsec += 1000000000; - reltime.tv_sec -= 1; - } - - /* Sleep for the required duration. If woken by a signal, - resume waiting as required by Single Unix Specification. */ - if (reltime.tv_sec < 0 || __libc_nanosleep(&reltime, NULL) == 0) - break; - } - - /* Block the restart signal again */ - sigprocmask(SIG_SETMASK, &initial_mask, NULL); - was_signalled = 0; - } else { - was_signalled = 1; - } - THREAD_SETMEM(self, p_signal_jmp, NULL); - } - - /* Now was_signalled is true if we exited the above code - due to the delivery of a restart signal. In that case, - we know we have been dequeued and resumed and that the - resume count is balanced. Otherwise, there are some - cases to consider. First, try to bump up the resume count - back to zero. If it goes to 1, it means restart() was - invoked on this thread. The signal must be consumed - and the count bumped down and everything is cool. We - can return a 1 to the caller. - Otherwise, no restart was delivered yet, so a potential - race exists; we return a 0 to the caller which must deal - with this race in an appropriate way; for example by - atomically removing the thread from consideration for a - wakeup---if such a thing fails, it means a restart is - being delivered. */ - - if (!was_signalled) { - if (atomic_increment(&self->p_resume_count) != -1) { - __pthread_wait_for_restart_signal(self); - atomic_decrement(&self->p_resume_count); /* should be zero now! */ - /* woke spontaneously and consumed restart signal */ - return 1; - } - /* woke spontaneously but did not consume restart---caller must resolve */ - return 0; - } - /* woken due to restart signal */ - return 1; -} -#endif /* __ASSUME_REALTIME_SIGNALS */ - -void __pthread_restart_new(pthread_descr th) -{ - /* The barrier is proabably not needed, in which case it still documents - our assumptions. The intent is to commit previous writes to shared - memory so the woken thread will have a consistent view. Complementary - read barriers are present to the suspend functions. */ - WRITE_MEMORY_BARRIER(); - kill(th->p_pid, __pthread_sig_restart); -} - -/* There is no __pthread_suspend_new because it would just - be a wasteful wrapper for __pthread_wait_for_restart_signal */ - -int -__pthread_timedsuspend_new(pthread_descr self, const struct timespec *abstime) -{ - sigset_t unblock, initial_mask; - int was_signalled = 0; - sigjmp_buf jmpbuf; - - if (sigsetjmp(jmpbuf, 1) == 0) { - THREAD_SETMEM(self, p_signal_jmp, &jmpbuf); - THREAD_SETMEM(self, p_signal, 0); - /* Unblock the restart signal */ - sigemptyset(&unblock); - sigaddset(&unblock, __pthread_sig_restart); - sigprocmask(SIG_UNBLOCK, &unblock, &initial_mask); - - while (1) { - struct timeval now; - struct timespec reltime; - - /* Compute a time offset relative to now. */ - __gettimeofday (&now, NULL); - reltime.tv_nsec = abstime->tv_nsec - now.tv_usec * 1000; - reltime.tv_sec = abstime->tv_sec - now.tv_sec; - if (reltime.tv_nsec < 0) { - reltime.tv_nsec += 1000000000; - reltime.tv_sec -= 1; - } - - /* Sleep for the required duration. If woken by a signal, - resume waiting as required by Single Unix Specification. */ - if (reltime.tv_sec < 0 || __libc_nanosleep(&reltime, NULL) == 0) - break; - } - - /* Block the restart signal again */ - sigprocmask(SIG_SETMASK, &initial_mask, NULL); - was_signalled = 0; - } else { - was_signalled = 1; - } - THREAD_SETMEM(self, p_signal_jmp, NULL); - - /* Now was_signalled is true if we exited the above code - due to the delivery of a restart signal. In that case, - everything is cool. We have been removed from whatever - we were waiting on by the other thread, and consumed its signal. - - Otherwise we this thread woke up spontaneously, or due to a signal other - than restart. This is an ambiguous case that must be resolved by - the caller; the thread is still eligible for a restart wakeup - so there is a race. */ - - READ_MEMORY_BARRIER(); /* See comment in __pthread_restart_new */ - return was_signalled; -} - - -/* Debugging aid */ - -#ifdef DEBUG -#include <stdarg.h> - -void __pthread_message(char * fmt, ...) -{ - char buffer[1024]; - va_list args; - sprintf(buffer, "%05d : ", __getpid()); - va_start(args, fmt); - vsnprintf(buffer + 8, sizeof(buffer) - 8, fmt, args); - va_end(args); - TEMP_FAILURE_RETRY(__libc_write(2, buffer, strlen(buffer))); -} - -#endif - - -#ifndef SHARED -/* We need a hook to force the cancelation wrappers and file locking - to be linked in when static libpthread is used. */ -extern const int __pthread_provide_wrappers; -static const int *const __pthread_require_wrappers = - &__pthread_provide_wrappers; -extern const int __pthread_provide_lockfile; -static const int *const __pthread_require_lockfile = - &__pthread_provide_lockfile; -#endif diff --git a/newlib/libc/sys/linux/linuxthreads/ptlongjmp.c b/newlib/libc/sys/linux/linuxthreads/ptlongjmp.c deleted file mode 100644 index c2ac55f63..000000000 --- a/newlib/libc/sys/linux/linuxthreads/ptlongjmp.c +++ /dev/null @@ -1,73 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1998 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Redefine siglongjmp and longjmp so that they interact correctly - with cleanup handlers */ - -#include <setjmp.h> -#include "pthread.h" -#include "internals.h" - -/* These functions are not declared anywhere since they shouldn't be - used at another place but here. */ -extern void __libc_siglongjmp (sigjmp_buf env, int val) - __attribute__ ((noreturn)); -extern void __libc_longjmp (jmp_buf env, int val) - __attribute__ ((noreturn)); - - -static void pthread_cleanup_upto(jmp_buf target) -{ - pthread_descr self = thread_self(); - struct _pthread_cleanup_buffer * c; - char *currentframe = CURRENT_STACK_FRAME; - - for (c = THREAD_GETMEM(self, p_cleanup); - c != NULL && _JMPBUF_UNWINDS(target, c); - c = c->__prev) - { -#if _STACK_GROWS_DOWN - if ((char *) c <= currentframe) - { - c = NULL; - break; - } -#elif _STACK_GROWS_UP - if ((char *) c >= currentframe) - { - c = NULL; - break; - } -#else -# error "Define either _STACK_GROWS_DOWN or _STACK_GROWS_UP" -#endif - c->__routine(c->__arg); - } - THREAD_SETMEM(self, p_cleanup, c); - if (THREAD_GETMEM(self, p_in_sighandler) - && _JMPBUF_UNWINDS(target, THREAD_GETMEM(self, p_in_sighandler))) - THREAD_SETMEM(self, p_in_sighandler, NULL); -} - -void siglongjmp(sigjmp_buf env, int val) -{ - pthread_cleanup_upto(env.__buf); - __libc_siglongjmp(env, val); -} - -void longjmp(jmp_buf env, int val) -{ - pthread_cleanup_upto(env); - __libc_longjmp(env, val); -} diff --git a/newlib/libc/sys/linux/linuxthreads/queue.h b/newlib/libc/sys/linux/linuxthreads/queue.h deleted file mode 100644 index 28bd75531..000000000 --- a/newlib/libc/sys/linux/linuxthreads/queue.h +++ /dev/null @@ -1,61 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Waiting queues */ - -/* Waiting queues are represented by lists of thread descriptors - linked through their p_nextwaiting field. The lists are kept - sorted by decreasing priority, and then decreasing waiting time. */ - -static inline void enqueue(pthread_descr * q, pthread_descr th) -{ - int prio = th->p_priority; - ASSERT(th->p_nextwaiting == NULL); - for (; *q != NULL; q = &((*q)->p_nextwaiting)) { - if (prio > (*q)->p_priority) { - th->p_nextwaiting = *q; - *q = th; - return; - } - } - *q = th; -} - -static inline pthread_descr dequeue(pthread_descr * q) -{ - pthread_descr th; - th = *q; - if (th != NULL) { - *q = th->p_nextwaiting; - th->p_nextwaiting = NULL; - } - return th; -} - -static inline int remove_from_queue(pthread_descr * q, pthread_descr th) -{ - for (; *q != NULL; q = &((*q)->p_nextwaiting)) { - if (*q == th) { - *q = th->p_nextwaiting; - th->p_nextwaiting = NULL; - return 1; - } - } - return 0; -} - -static inline int queue_is_empty(pthread_descr * q) -{ - return *q == NULL; -} diff --git a/newlib/libc/sys/linux/linuxthreads/reent.c b/newlib/libc/sys/linux/linuxthreads/reent.c deleted file mode 100644 index 44d6f7858..000000000 --- a/newlib/libc/sys/linux/linuxthreads/reent.c +++ /dev/null @@ -1,18 +0,0 @@ -/* Define the location of _REENT for the newlib C library */ - -#include <reent.h> -#include "pthread.h" -#include "internals.h" - -struct _reent * __thread_reent() -{ - pthread_descr self = thread_self(); - return THREAD_GETMEM (self, p_reentp); -} - -/* Return thread specific resolver state. */ -struct __res_state * __res_state() -{ - pthread_descr self = thread_self(); - return THREAD_GETMEM (self, p_resp); -} diff --git a/newlib/libc/sys/linux/linuxthreads/reqsyscalls.c b/newlib/libc/sys/linux/linuxthreads/reqsyscalls.c deleted file mode 100644 index 714a8ba36..000000000 --- a/newlib/libc/sys/linux/linuxthreads/reqsyscalls.c +++ /dev/null @@ -1,20 +0,0 @@ -/* EL/IX level 1 and 2 libraries don't have the following syscalls, - but we need them due to our threading model based on processes */ - -#include <time.h> -#include <sched.h> -#include <sys/wait.h> -#include <machine/syscall.h> - -#define __NR___waitpid __NR_waitpid -#define __NR___sched_getparam __NR_sched_getparam -#define __NR___sched_getscheduler __NR_sched_getscheduler -#define __NR___sched_setscheduler __NR_sched_setscheduler - -_syscall2(int,__sched_getparam,pid_t,pid,struct sched_param *,sched); -_syscall1(int,__sched_getscheduler,pid_t,pid); -_syscall3(int,__sched_setscheduler,pid_t,pid,int,policy,const struct sched_param *,sched); - -/* we want __libc____waitpid defined to support __waitpid which is - defined in wrapsyscall.c */ -_syscall3_base(pid_t,__waitpid,pid_t,pid,int *,wait_stat,int,options) diff --git a/newlib/libc/sys/linux/linuxthreads/restart.h b/newlib/libc/sys/linux/linuxthreads/restart.h deleted file mode 100644 index 24d9fab74..000000000 --- a/newlib/libc/sys/linux/linuxthreads/restart.h +++ /dev/null @@ -1,49 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -#include <signal.h> -#include <kernel-features.h> - -/* Primitives for controlling thread execution */ - -static inline void restart(pthread_descr th) -{ - /* See pthread.c */ -#if __ASSUME_REALTIME_SIGNALS - __pthread_restart_new(th); -#else - __pthread_restart(th); -#endif -} - -static inline void suspend(pthread_descr self) -{ - /* See pthread.c */ -#if __ASSUME_REALTIME_SIGNALS - __pthread_wait_for_restart_signal(self); -#else - __pthread_suspend(self); -#endif -} - -static inline int timedsuspend(pthread_descr self, - const struct timespec *abstime) -{ - /* See pthread.c */ -#if __ASSUME_REALTIME_SIGNALS - return __pthread_timedsuspend_new(self, abstime); -#else - return __pthread_timedsuspend(self, abstime); -#endif -} diff --git a/newlib/libc/sys/linux/linuxthreads/rwlock.c b/newlib/libc/sys/linux/linuxthreads/rwlock.c deleted file mode 100644 index e39597014..000000000 --- a/newlib/libc/sys/linux/linuxthreads/rwlock.c +++ /dev/null @@ -1,658 +0,0 @@ -/* Read-write lock implementation. - Copyright (C) 1998, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Xavier Leroy <Xavier.Leroy@inria.fr> - and Ulrich Drepper <drepper@cygnus.com>, 1998. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <bits/libc-lock.h> -#include <errno.h> -#include <pthread.h> -#include <stdlib.h> -#include "internals.h" -#include "queue.h" -#include "spinlock.h" -#include "restart.h" - -/* Function called by pthread_cancel to remove the thread from - waiting inside pthread_rwlock_timedrdlock or pthread_rwlock_timedwrlock. */ - -static int rwlock_rd_extricate_func(void *obj, pthread_descr th) -{ - pthread_rwlock_t *rwlock = obj; - int did_remove = 0; - - __pthread_lock(&rwlock->__rw_lock, NULL); - did_remove = remove_from_queue(&rwlock->__rw_read_waiting, th); - __pthread_unlock(&rwlock->__rw_lock); - - return did_remove; -} - -static int rwlock_wr_extricate_func(void *obj, pthread_descr th) -{ - pthread_rwlock_t *rwlock = obj; - int did_remove = 0; - - __pthread_lock(&rwlock->__rw_lock, NULL); - did_remove = remove_from_queue(&rwlock->__rw_write_waiting, th); - __pthread_unlock(&rwlock->__rw_lock); - - return did_remove; -} - -/* - * Check whether the calling thread already owns one or more read locks on the - * specified lock. If so, return a pointer to the read lock info structure - * corresponding to that lock. - */ - -static pthread_readlock_info * -rwlock_is_in_list(pthread_descr self, pthread_rwlock_t *rwlock) -{ - pthread_readlock_info *info; - - for (info = THREAD_GETMEM (self, p_readlock_list); info != NULL; - info = info->pr_next) - { - if (info->pr_lock == rwlock) - return info; - } - - return NULL; -} - -/* - * Add a new lock to the thread's list of locks for which it has a read lock. - * A new info node must be allocated for this, which is taken from the thread's - * free list, or by calling malloc. If malloc fails, a null pointer is - * returned. Otherwise the lock info structure is initialized and pushed - * onto the thread's list. - */ - -static pthread_readlock_info * -rwlock_add_to_list(pthread_descr self, pthread_rwlock_t *rwlock) -{ - pthread_readlock_info *info = THREAD_GETMEM (self, p_readlock_free); - - if (info != NULL) - THREAD_SETMEM (self, p_readlock_free, info->pr_next); - else - info = malloc(sizeof *info); - - if (info == NULL) - return NULL; - - info->pr_lock_count = 1; - info->pr_lock = rwlock; - info->pr_next = THREAD_GETMEM (self, p_readlock_list); - THREAD_SETMEM (self, p_readlock_list, info); - - return info; -} - -/* - * If the thread owns a read lock over the given pthread_rwlock_t, - * and this read lock is tracked in the thread's lock list, - * this function returns a pointer to the info node in that list. - * It also decrements the lock count within that node, and if - * it reaches zero, it removes the node from the list. - * If nothing is found, it returns a null pointer. - */ - -static pthread_readlock_info * -rwlock_remove_from_list(pthread_descr self, pthread_rwlock_t *rwlock) -{ - pthread_readlock_info **pinfo; - - for (pinfo = &self->p_readlock_list; *pinfo != NULL; pinfo = &(*pinfo)->pr_next) - { - if ((*pinfo)->pr_lock == rwlock) - { - pthread_readlock_info *info = *pinfo; - if (--info->pr_lock_count == 0) - *pinfo = info->pr_next; - return info; - } - } - - return NULL; -} - -/* - * This function checks whether the conditions are right to place a read lock. - * It returns 1 if so, otherwise zero. The rwlock's internal lock must be - * locked upon entry. - */ - -static int -rwlock_can_rdlock(pthread_rwlock_t *rwlock, int have_lock_already) -{ - /* Can't readlock; it is write locked. */ - if (rwlock->__rw_writer != NULL) - return 0; - - /* Lock prefers readers; get it. */ - if (rwlock->__rw_kind == PTHREAD_RWLOCK_PREFER_READER_NP) - return 1; - - /* Lock prefers writers, but none are waiting. */ - if (queue_is_empty(&rwlock->__rw_write_waiting)) - return 1; - - /* Writers are waiting, but this thread already has a read lock */ - if (have_lock_already) - return 1; - - /* Writers are waiting, and this is a new lock */ - return 0; -} - -/* - * This function helps support brain-damaged recursive read locking - * semantics required by Unix 98, while maintaining write priority. - * This basically determines whether this thread already holds a read lock - * already. It returns 1 if so, otherwise it returns 0. - * - * If the thread has any ``untracked read locks'' then it just assumes - * that this lock is among them, just to be safe, and returns 1. - * - * Also, if it finds the thread's lock in the list, it sets the pointer - * referenced by pexisting to refer to the list entry. - * - * If the thread has no untracked locks, and the lock is not found - * in its list, then it is added to the list. If this fails, - * then *pout_of_mem is set to 1. - */ - -static int -rwlock_have_already(pthread_descr *pself, pthread_rwlock_t *rwlock, - pthread_readlock_info **pexisting, int *pout_of_mem) -{ - pthread_readlock_info *existing = NULL; - int out_of_mem = 0, have_lock_already = 0; - pthread_descr self = *pself; - - if (rwlock->__rw_kind == PTHREAD_RWLOCK_PREFER_WRITER_NP) - { - if (!self) - *pself = self = thread_self(); - - existing = rwlock_is_in_list(self, rwlock); - - if (existing != NULL - || THREAD_GETMEM (self, p_untracked_readlock_count) > 0) - have_lock_already = 1; - else - { - existing = rwlock_add_to_list(self, rwlock); - if (existing == NULL) - out_of_mem = 1; - } - } - - *pout_of_mem = out_of_mem; - *pexisting = existing; - - return have_lock_already; -} - -int -__pthread_rwlock_init (pthread_rwlock_t *rwlock, - const pthread_rwlockattr_t *attr) -{ - __pthread_init_lock(&rwlock->__rw_lock); - rwlock->__rw_readers = 0; - rwlock->__rw_writer = NULL; - rwlock->__rw_read_waiting = NULL; - rwlock->__rw_write_waiting = NULL; - - if (attr == NULL) - { - rwlock->__rw_kind = PTHREAD_RWLOCK_DEFAULT_NP; - rwlock->__rw_pshared = PTHREAD_PROCESS_PRIVATE; - } - else - { - rwlock->__rw_kind = attr->__lockkind; - rwlock->__rw_pshared = attr->__pshared; - } - - return 0; -} -strong_alias (__pthread_rwlock_init, pthread_rwlock_init) - - -int -__pthread_rwlock_destroy (pthread_rwlock_t *rwlock) -{ - int readers; - _pthread_descr writer; - - __pthread_lock (&rwlock->__rw_lock, NULL); - readers = rwlock->__rw_readers; - writer = rwlock->__rw_writer; - __pthread_unlock (&rwlock->__rw_lock); - - if (readers > 0 || writer != NULL) - return EBUSY; - - return 0; -} -strong_alias (__pthread_rwlock_destroy, pthread_rwlock_destroy) - -int -__pthread_rwlock_rdlock (pthread_rwlock_t *rwlock) -{ - pthread_descr self = NULL; - pthread_readlock_info *existing; - int out_of_mem, have_lock_already; - - have_lock_already = rwlock_have_already(&self, rwlock, - &existing, &out_of_mem); - - if (self == NULL) - self = thread_self (); - - for (;;) - { - __pthread_lock (&rwlock->__rw_lock, self); - - if (rwlock_can_rdlock(rwlock, have_lock_already)) - break; - - enqueue (&rwlock->__rw_read_waiting, self); - __pthread_unlock (&rwlock->__rw_lock); - suspend (self); /* This is not a cancellation point */ - } - - ++rwlock->__rw_readers; - __pthread_unlock (&rwlock->__rw_lock); - - if (have_lock_already || out_of_mem) - { - if (existing != NULL) - ++existing->pr_lock_count; - else - ++self->p_untracked_readlock_count; - } - - return 0; -} -strong_alias (__pthread_rwlock_rdlock, pthread_rwlock_rdlock) - -int -__pthread_rwlock_timedrdlock (pthread_rwlock_t *rwlock, - const struct timespec *abstime) -{ - pthread_descr self = NULL; - pthread_readlock_info *existing; - int out_of_mem, have_lock_already; - pthread_extricate_if extr; - - if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000) - return EINVAL; - - have_lock_already = rwlock_have_already(&self, rwlock, - &existing, &out_of_mem); - - if (self == NULL) - self = thread_self (); - - /* Set up extrication interface */ - extr.pu_object = rwlock; - extr.pu_extricate_func = rwlock_rd_extricate_func; - - /* Register extrication interface */ - __pthread_set_own_extricate_if (self, &extr); - - for (;;) - { - __pthread_lock (&rwlock->__rw_lock, self); - - if (rwlock_can_rdlock(rwlock, have_lock_already)) - break; - - enqueue (&rwlock->__rw_read_waiting, self); - __pthread_unlock (&rwlock->__rw_lock); - /* This is not a cancellation point */ - if (timedsuspend (self, abstime) == 0) - { - int was_on_queue; - - __pthread_lock (&rwlock->__rw_lock, self); - was_on_queue = remove_from_queue (&rwlock->__rw_read_waiting, self); - __pthread_unlock (&rwlock->__rw_lock); - - if (was_on_queue) - { - __pthread_set_own_extricate_if (self, 0); - return ETIMEDOUT; - } - - /* Eat the outstanding restart() from the signaller */ - suspend (self); - } - } - - __pthread_set_own_extricate_if (self, 0); - - ++rwlock->__rw_readers; - __pthread_unlock (&rwlock->__rw_lock); - - if (have_lock_already || out_of_mem) - { - if (existing != NULL) - ++existing->pr_lock_count; - else - ++self->p_untracked_readlock_count; - } - - return 0; -} -strong_alias (__pthread_rwlock_timedrdlock, pthread_rwlock_timedrdlock) - -int -__pthread_rwlock_tryrdlock (pthread_rwlock_t *rwlock) -{ - pthread_descr self = thread_self(); - pthread_readlock_info *existing; - int out_of_mem, have_lock_already; - int retval = EBUSY; - - have_lock_already = rwlock_have_already(&self, rwlock, - &existing, &out_of_mem); - - __pthread_lock (&rwlock->__rw_lock, self); - - /* 0 is passed to here instead of have_lock_already. - This is to meet Single Unix Spec requirements: - if writers are waiting, pthread_rwlock_tryrdlock - does not acquire a read lock, even if the caller has - one or more read locks already. */ - - if (rwlock_can_rdlock(rwlock, 0)) - { - ++rwlock->__rw_readers; - retval = 0; - } - - __pthread_unlock (&rwlock->__rw_lock); - - if (retval == 0) - { - if (have_lock_already || out_of_mem) - { - if (existing != NULL) - ++existing->pr_lock_count; - else - ++self->p_untracked_readlock_count; - } - } - - return retval; -} -strong_alias (__pthread_rwlock_tryrdlock, pthread_rwlock_tryrdlock) - - -int -__pthread_rwlock_wrlock (pthread_rwlock_t *rwlock) -{ - pthread_descr self = thread_self (); - - while(1) - { - __pthread_lock (&rwlock->__rw_lock, self); - if (rwlock->__rw_readers == 0 && rwlock->__rw_writer == NULL) - { - rwlock->__rw_writer = self; - __pthread_unlock (&rwlock->__rw_lock); - return 0; - } - - /* Suspend ourselves, then try again */ - enqueue (&rwlock->__rw_write_waiting, self); - __pthread_unlock (&rwlock->__rw_lock); - suspend (self); /* This is not a cancellation point */ - } -} -strong_alias (__pthread_rwlock_wrlock, pthread_rwlock_wrlock) - - -int -__pthread_rwlock_timedwrlock (pthread_rwlock_t *rwlock, - const struct timespec *abstime) -{ - pthread_descr self; - pthread_extricate_if extr; - - if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000) - return EINVAL; - - self = thread_self (); - - /* Set up extrication interface */ - extr.pu_object = rwlock; - extr.pu_extricate_func = rwlock_wr_extricate_func; - - /* Register extrication interface */ - __pthread_set_own_extricate_if (self, &extr); - - while(1) - { - __pthread_lock (&rwlock->__rw_lock, self); - - if (rwlock->__rw_readers == 0 && rwlock->__rw_writer == NULL) - { - rwlock->__rw_writer = self; - __pthread_set_own_extricate_if (self, 0); - __pthread_unlock (&rwlock->__rw_lock); - return 0; - } - - /* Suspend ourselves, then try again */ - enqueue (&rwlock->__rw_write_waiting, self); - __pthread_unlock (&rwlock->__rw_lock); - /* This is not a cancellation point */ - if (timedsuspend (self, abstime) == 0) - { - int was_on_queue; - - __pthread_lock (&rwlock->__rw_lock, self); - was_on_queue = remove_from_queue (&rwlock->__rw_write_waiting, self); - __pthread_unlock (&rwlock->__rw_lock); - - if (was_on_queue) - { - __pthread_set_own_extricate_if (self, 0); - return ETIMEDOUT; - } - - /* Eat the outstanding restart() from the signaller */ - suspend (self); - } - } -} -strong_alias (__pthread_rwlock_timedwrlock, pthread_rwlock_timedwrlock) - - -int -__pthread_rwlock_trywrlock (pthread_rwlock_t *rwlock) -{ - int result = EBUSY; - - __pthread_lock (&rwlock->__rw_lock, NULL); - if (rwlock->__rw_readers == 0 && rwlock->__rw_writer == NULL) - { - rwlock->__rw_writer = thread_self (); - result = 0; - } - __pthread_unlock (&rwlock->__rw_lock); - - return result; -} -strong_alias (__pthread_rwlock_trywrlock, pthread_rwlock_trywrlock) - - -int -__pthread_rwlock_unlock (pthread_rwlock_t *rwlock) -{ - pthread_descr torestart; - pthread_descr th; - - __pthread_lock (&rwlock->__rw_lock, NULL); - if (rwlock->__rw_writer != NULL) - { - /* Unlocking a write lock. */ - if (rwlock->__rw_writer != thread_self ()) - { - __pthread_unlock (&rwlock->__rw_lock); - return EPERM; - } - rwlock->__rw_writer = NULL; - - if ((rwlock->__rw_kind == PTHREAD_RWLOCK_PREFER_READER_NP - && !queue_is_empty(&rwlock->__rw_read_waiting)) - || (th = dequeue(&rwlock->__rw_write_waiting)) == NULL) - { - /* Restart all waiting readers. */ - torestart = rwlock->__rw_read_waiting; - rwlock->__rw_read_waiting = NULL; - __pthread_unlock (&rwlock->__rw_lock); - while ((th = dequeue (&torestart)) != NULL) - restart (th); - } - else - { - /* Restart one waiting writer. */ - __pthread_unlock (&rwlock->__rw_lock); - restart (th); - } - } - else - { - /* Unlocking a read lock. */ - if (rwlock->__rw_readers == 0) - { - __pthread_unlock (&rwlock->__rw_lock); - return EPERM; - } - - --rwlock->__rw_readers; - if (rwlock->__rw_readers == 0) - /* Restart one waiting writer, if any. */ - th = dequeue (&rwlock->__rw_write_waiting); - else - th = NULL; - - __pthread_unlock (&rwlock->__rw_lock); - if (th != NULL) - restart (th); - - /* Recursive lock fixup */ - - if (rwlock->__rw_kind == PTHREAD_RWLOCK_PREFER_WRITER_NP) - { - pthread_descr self = thread_self(); - pthread_readlock_info *victim = rwlock_remove_from_list(self, rwlock); - - if (victim != NULL) - { - if (victim->pr_lock_count == 0) - { - victim->pr_next = THREAD_GETMEM (self, p_readlock_free); - THREAD_SETMEM (self, p_readlock_free, victim); - } - } - else - { - int val = THREAD_GETMEM (self, p_untracked_readlock_count); - if (val > 0) - THREAD_SETMEM (self, p_untracked_readlock_count, val - 1); - } - } - } - - return 0; -} -strong_alias (__pthread_rwlock_unlock, pthread_rwlock_unlock) - - - -int -pthread_rwlockattr_init (pthread_rwlockattr_t *attr) -{ - attr->__lockkind = 0; - attr->__pshared = PTHREAD_PROCESS_PRIVATE; - - return 0; -} - - -int -__pthread_rwlockattr_destroy (pthread_rwlockattr_t *attr) -{ - return 0; -} -strong_alias (__pthread_rwlockattr_destroy, pthread_rwlockattr_destroy) - - -int -pthread_rwlockattr_getpshared (const pthread_rwlockattr_t *attr, int *pshared) -{ - *pshared = attr->__pshared; - return 0; -} - - -int -pthread_rwlockattr_setpshared (pthread_rwlockattr_t *attr, int pshared) -{ - if (pshared != PTHREAD_PROCESS_PRIVATE && pshared != PTHREAD_PROCESS_SHARED) - return EINVAL; - - /* For now it is not possible to shared a conditional variable. */ - if (pshared != PTHREAD_PROCESS_PRIVATE) - return ENOSYS; - - attr->__pshared = pshared; - - return 0; -} - - -int -pthread_rwlockattr_getkind_np (const pthread_rwlockattr_t *attr, int *pref) -{ - *pref = attr->__lockkind; - return 0; -} - - -int -pthread_rwlockattr_setkind_np (pthread_rwlockattr_t *attr, int pref) -{ - if (pref != PTHREAD_RWLOCK_PREFER_READER_NP - && pref != PTHREAD_RWLOCK_PREFER_WRITER_NP - && pref != PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP - && pref != PTHREAD_RWLOCK_DEFAULT_NP) - return EINVAL; - - attr->__lockkind = pref; - - return 0; -} diff --git a/newlib/libc/sys/linux/linuxthreads/semaphore.c b/newlib/libc/sys/linux/linuxthreads/semaphore.c deleted file mode 100644 index e0dac4120..000000000 --- a/newlib/libc/sys/linux/linuxthreads/semaphore.c +++ /dev/null @@ -1,304 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Semaphores a la POSIX 1003.1b */ - -#include <errno.h> -#include "pthread.h" -#include "semaphore.h" -#include "internals.h" -#include "spinlock.h" -#include "restart.h" -#include "queue.h" -#include <shlib-compat.h> - -int __new_sem_init(sem_t *sem, int pshared, unsigned int value) -{ - if (value > SEM_VALUE_MAX) { - errno = EINVAL; - return -1; - } - if (pshared) { - errno = ENOSYS; - return -1; - } - __pthread_init_lock(&sem->__sem_lock); - sem->__sem_value = value; - sem->__sem_waiting = NULL; - return 0; -} - -/* Function called by pthread_cancel to remove the thread from - waiting inside __new_sem_wait. */ - -static int new_sem_extricate_func(void *obj, pthread_descr th) -{ - volatile pthread_descr self = thread_self(); - sem_t *sem = obj; - int did_remove = 0; - - __pthread_lock(&sem->__sem_lock, self); - did_remove = remove_from_queue(&sem->__sem_waiting, th); - __pthread_unlock(&sem->__sem_lock); - - return did_remove; -} - -int __new_sem_wait(sem_t * sem) -{ - volatile pthread_descr self = thread_self(); - pthread_extricate_if extr; - int already_canceled = 0; - int spurious_wakeup_count; - - /* Set up extrication interface */ - extr.pu_object = sem; - extr.pu_extricate_func = new_sem_extricate_func; - - __pthread_lock(&sem->__sem_lock, self); - if (sem->__sem_value > 0) { - sem->__sem_value--; - __pthread_unlock(&sem->__sem_lock); - return 0; - } - /* Register extrication interface */ - THREAD_SETMEM(self, p_sem_avail, 0); - __pthread_set_own_extricate_if(self, &extr); - /* Enqueue only if not already cancelled. */ - if (!(THREAD_GETMEM(self, p_canceled) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE)) - enqueue(&sem->__sem_waiting, self); - else - already_canceled = 1; - __pthread_unlock(&sem->__sem_lock); - - if (already_canceled) { - __pthread_set_own_extricate_if(self, 0); - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - } - - /* Wait for sem_post or cancellation, or fall through if already canceled */ - spurious_wakeup_count = 0; - while (1) - { - suspend(self); - if (THREAD_GETMEM(self, p_sem_avail) == 0 - && (THREAD_GETMEM(self, p_woken_by_cancel) == 0 - || THREAD_GETMEM(self, p_cancelstate) != PTHREAD_CANCEL_ENABLE)) - { - /* Count resumes that don't belong to us. */ - spurious_wakeup_count++; - continue; - } - break; - } - __pthread_set_own_extricate_if(self, 0); - - /* Terminate only if the wakeup came from cancellation. */ - /* Otherwise ignore cancellation because we got the semaphore. */ - - if (THREAD_GETMEM(self, p_woken_by_cancel) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE) { - THREAD_SETMEM(self, p_woken_by_cancel, 0); - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - } - /* We got the semaphore */ - return 0; -} - -int __new_sem_trywait(sem_t * sem) -{ - int retval; - - __pthread_lock(&sem->__sem_lock, NULL); - if (sem->__sem_value == 0) { - errno = EAGAIN; - retval = -1; - } else { - sem->__sem_value--; - retval = 0; - } - __pthread_unlock(&sem->__sem_lock); - return retval; -} - -int __new_sem_post(sem_t * sem) -{ - pthread_descr self = thread_self(); - pthread_descr th; - struct pthread_request request; - - if (THREAD_GETMEM(self, p_in_sighandler) == NULL) { - __pthread_lock(&sem->__sem_lock, self); - if (sem->__sem_waiting == NULL) { - if (sem->__sem_value >= SEM_VALUE_MAX) { - /* Overflow */ - errno = ERANGE; - __pthread_unlock(&sem->__sem_lock); - return -1; - } - sem->__sem_value++; - __pthread_unlock(&sem->__sem_lock); - } else { - th = dequeue(&sem->__sem_waiting); - __pthread_unlock(&sem->__sem_lock); - th->p_sem_avail = 1; - WRITE_MEMORY_BARRIER(); - restart(th); - } - } else { - /* If we're in signal handler, delegate post operation to - the thread manager. */ - if (__pthread_manager_request < 0) { - if (__pthread_initialize_manager() < 0) { - errno = EAGAIN; - return -1; - } - } - request.req_kind = REQ_POST; - request.req_args.post = sem; - TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request, - (char *) &request, sizeof(request))); - } - return 0; -} - -int __new_sem_getvalue(sem_t * sem, int * sval) -{ - *sval = sem->__sem_value; - return 0; -} - -int __new_sem_destroy(sem_t * sem) -{ - if (sem->__sem_waiting != NULL) { - __set_errno (EBUSY); - return -1; - } - return 0; -} - -sem_t *sem_open(const char *name, int oflag, ...) -{ - __set_errno (ENOSYS); - return SEM_FAILED; -} - -int sem_close(sem_t *sem) -{ - __set_errno (ENOSYS); - return -1; -} - -int sem_unlink(const char *name) -{ - __set_errno (ENOSYS); - return -1; -} - -int sem_timedwait(sem_t *sem, const struct timespec *abstime) -{ - pthread_descr self = thread_self(); - pthread_extricate_if extr; - int already_canceled = 0; - int spurious_wakeup_count; - - __pthread_lock(&sem->__sem_lock, self); - if (sem->__sem_value > 0) { - --sem->__sem_value; - __pthread_unlock(&sem->__sem_lock); - return 0; - } - - if (abstime->tv_nsec < 0 || abstime->tv_nsec >= 1000000000) { - /* The standard requires that if the function would block and the - time value is illegal, the function returns with an error. */ - __pthread_unlock(&sem->__sem_lock); - return EINVAL; - } - - /* Set up extrication interface */ - extr.pu_object = sem; - extr.pu_extricate_func = new_sem_extricate_func; - - /* Register extrication interface */ - THREAD_SETMEM(self, p_sem_avail, 0); - __pthread_set_own_extricate_if(self, &extr); - /* Enqueue only if not already cancelled. */ - if (!(THREAD_GETMEM(self, p_canceled) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE)) - enqueue(&sem->__sem_waiting, self); - else - already_canceled = 1; - __pthread_unlock(&sem->__sem_lock); - - if (already_canceled) { - __pthread_set_own_extricate_if(self, 0); - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - } - - spurious_wakeup_count = 0; - while (1) - { - if (timedsuspend(self, abstime) == 0) { - int was_on_queue; - - /* __pthread_lock will queue back any spurious restarts that - may happen to it. */ - - __pthread_lock(&sem->__sem_lock, self); - was_on_queue = remove_from_queue(&sem->__sem_waiting, self); - __pthread_unlock(&sem->__sem_lock); - - if (was_on_queue) { - __pthread_set_own_extricate_if(self, 0); - return ETIMEDOUT; - } - - /* Eat the outstanding restart() from the signaller */ - suspend(self); - } - - if (THREAD_GETMEM(self, p_sem_avail) == 0 - && (THREAD_GETMEM(self, p_woken_by_cancel) == 0 - || THREAD_GETMEM(self, p_cancelstate) != PTHREAD_CANCEL_ENABLE)) - { - /* Count resumes that don't belong to us. */ - spurious_wakeup_count++; - continue; - } - break; - } - - __pthread_set_own_extricate_if(self, 0); - - /* Terminate only if the wakeup came from cancellation. */ - /* Otherwise ignore cancellation because we got the semaphore. */ - - if (THREAD_GETMEM(self, p_woken_by_cancel) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE) { - THREAD_SETMEM(self, p_woken_by_cancel, 0); - __pthread_do_exit(PTHREAD_CANCELED, CURRENT_STACK_FRAME); - } - /* We got the semaphore */ - return 0; -} - - -versioned_symbol (libpthread, __new_sem_init, sem_init, GLIBC_2_1); -versioned_symbol (libpthread, __new_sem_wait, sem_wait, GLIBC_2_1); -versioned_symbol (libpthread, __new_sem_trywait, sem_trywait, GLIBC_2_1); -versioned_symbol (libpthread, __new_sem_post, sem_post, GLIBC_2_1); -versioned_symbol (libpthread, __new_sem_getvalue, sem_getvalue, GLIBC_2_1); -versioned_symbol (libpthread, __new_sem_destroy, sem_destroy, GLIBC_2_1); diff --git a/newlib/libc/sys/linux/linuxthreads/semaphore.h b/newlib/libc/sys/linux/linuxthreads/semaphore.h deleted file mode 100644 index 5971f0d51..000000000 --- a/newlib/libc/sys/linux/linuxthreads/semaphore.h +++ /dev/null @@ -1,89 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -#ifndef _SEMAPHORE_H -#define _SEMAPHORE_H 1 - -#include <features.h> -#include <sys/types.h> -#include <bits/pthreadtypes.h> -#ifdef __USE_XOPEN2K -# define __need_timespec -# include <time.h> -#endif - -#ifndef _PTHREAD_DESCR_DEFINED -/* Thread descriptors. Needed for `sem_t' definition. */ -typedef struct _pthread_descr_struct *_pthread_descr; -# define _PTHREAD_DESCR_DEFINED -#endif - -/* System specific semaphore definition. */ -typedef struct -{ - struct _pthread_fastlock __sem_lock; - int __sem_value; - _pthread_descr __sem_waiting; -} sem_t; - - - -/* Value returned if `sem_open' failed. */ -#define SEM_FAILED ((sem_t *) 0) - -/* Maximum value the semaphore can have. */ -#define SEM_VALUE_MAX ((int) ((~0u) >> 1)) - - -__BEGIN_DECLS - -/* Initialize semaphore object SEM to VALUE. If PSHARED then share it - with other processes. */ -extern int sem_init (sem_t *__sem, int __pshared, unsigned int __value) __THROW; - -/* Free resources associated with semaphore object SEM. */ -extern int sem_destroy (sem_t *__sem) __THROW; - -/* Open a named semaphore NAME with open flaot OFLAG. */ -extern sem_t *sem_open (__const char *__name, int __oflag, ...) __THROW; - -/* Close descriptor for named semaphore SEM. */ -extern int sem_close (sem_t *__sem) __THROW; - -/* Remove named semaphore NAME. */ -extern int sem_unlink (__const char *__name) __THROW; - -/* Wait for SEM being posted. */ -extern int sem_wait (sem_t *__sem) __THROW; - -#ifdef __USE_XOPEN2K -/* Similar to `sem_wait' but wait only until ABSTIME. */ -extern int sem_timedwait (sem_t *__restrict __sem, - __const struct timespec *__restrict __abstime) - __THROW; -#endif - -/* Test whether SEM is posted. */ -extern int sem_trywait (sem_t *__sem) __THROW; - -/* Post SEM. */ -extern int sem_post (sem_t *__sem) __THROW; - -/* Get current value of SEM and store it in *SVAL. */ -extern int sem_getvalue (sem_t *__restrict __sem, int *__restrict __sval) - __THROW; - -__END_DECLS - -#endif /* semaphore.h */ diff --git a/newlib/libc/sys/linux/linuxthreads/shlib-compat.h b/newlib/libc/sys/linux/linuxthreads/shlib-compat.h deleted file mode 100644 index 245b8aa89..000000000 --- a/newlib/libc/sys/linux/linuxthreads/shlib-compat.h +++ /dev/null @@ -1,84 +0,0 @@ -/* Macros for managing ABI-compatibility definitions using ELF symbol versions. - Copyright (C) 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#ifndef _SHLIB_COMPAT_H -#define _SHLIB_COMPAT_H 1 - -#if defined HAVE_ELF && defined DO_VERSIONING -/* Since there is just one set of .d files generated, we need to - include this unconditionally to have the dependency noticed properly. */ -#include <abi-versions.h> /* header generated by abi-versions.awk */ -#endif - -#if defined HAVE_ELF && defined SHARED && defined DO_VERSIONING - -/* The file abi-versions.h (generated by scripts/abi-versions.awk) defines - symbols like `ABI_libm_GLIBC_2_0' for each version set in the source - code for each library. For a version set that is subsumed by a later - version set, the definition gives the subsuming set, i.e. if GLIBC_2_0 - is subsumed by GLIBC_2_1, then ABI_libm_GLIBC_2_0 == ABI_libm_GLIBC_2_1. - Each version set that is to be distinctly defined in the output has an - unique positive integer value, increasing with newer versions. Thus, - evaluating two ABI_* symbols reduces to integer values that differ only - when the two version sets named are in fact two different ABIs we are - supporting. If these do not differ, then there is no need to compile in - extra code to support this version set where it has been superseded by a - newer version. The compatibility code should be conditionalized with - e.g. `#if SHLIB_COMPAT (libm, GLIBC_2_0, GLIBC_2_2)' for code introduced - in the GLIBC_2.0 version and obsoleted in the GLIBC_2.2 version. */ - -# define SHLIB_COMPAT(lib, introduced, obsoleted) \ - (!(ABI_##lib##_##obsoleted - 0) \ - || ((ABI_##lib##_##introduced - 0) < (ABI_##lib##_##obsoleted - 0))) - -/* That header also defines symbols like `VERSION_libm_GLIBC_2_1' to - the version set name to use for e.g. symbols first introduced into - libm in the GLIBC_2.1 version. Definitions of symbols with explicit - versions should look like: - versioned_symbol (libm, new_foo, foo, GLIBC_2_1); - This will define the symbol `foo' with the appropriate default version, - i.e. either GLIBC_2.1 or the "earliest version" specified in - shlib-versions if that is newer. */ - -# define versioned_symbol(lib, local, symbol, version) \ - versioned_symbol_1 (local, symbol, VERSION_##lib##_##version) -# define versioned_symbol_1(local, symbol, name) \ - default_symbol_version (local, symbol, name) - -# define compat_symbol(lib, local, symbol, version) \ - compat_symbol_1 (local, symbol, VERSION_##lib##_##version) -# define compat_symbol_1(local, symbol, name) \ - symbol_version (local, symbol, name) - -#else - -/* Not compiling ELF shared libraries at all, so never any old versions. */ -# define SHLIB_COMPAT(lib, introduced, obsoleted) 0 - -/* No versions to worry about, just make this the global definition. */ -# define versioned_symbol(lib, local, symbol, version) \ - weak_alias (local, symbol) - -/* This should not appear outside `#if SHLIB_COMPAT (...)'. */ -# define compat_symbol(lib, local, symbol, version) ... - -#endif - - -#endif /* shlib-compat.h */ diff --git a/newlib/libc/sys/linux/linuxthreads/signals.c b/newlib/libc/sys/linux/linuxthreads/signals.c deleted file mode 100644 index da3ce69a4..000000000 --- a/newlib/libc/sys/linux/linuxthreads/signals.c +++ /dev/null @@ -1,243 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Handling of signals */ - -#include <errno.h> -#include <signal.h> -#include "pthread.h" -#include "internals.h" -#include "spinlock.h" -#include <ucontext.h> -#include <sigcontextinfo.h> - -int pthread_sigmask(int how, const sigset_t * newmask, sigset_t * oldmask) -{ - sigset_t mask; - - if (newmask != NULL) { - mask = *newmask; - /* Don't allow __pthread_sig_restart to be unmasked. - Don't allow __pthread_sig_cancel to be masked. */ - switch(how) { - case SIG_SETMASK: - sigaddset(&mask, __pthread_sig_restart); - sigdelset(&mask, __pthread_sig_cancel); - break; - case SIG_BLOCK: - sigdelset(&mask, __pthread_sig_cancel); - break; - case SIG_UNBLOCK: - sigdelset(&mask, __pthread_sig_restart); - break; - } - newmask = &mask; - } - if (sigprocmask(how, newmask, oldmask) == -1) - return errno; - else - return 0; -} - -int pthread_kill(pthread_t thread, int signo) -{ - pthread_handle handle = thread_handle(thread); - int pid; - - __pthread_lock(&handle->h_lock, NULL); - if (invalid_handle(handle, thread)) { - __pthread_unlock(&handle->h_lock); - return ESRCH; - } - pid = handle->h_descr->p_pid; - __pthread_unlock(&handle->h_lock); - if (kill(pid, signo) == -1) - return errno; - else - return 0; -} - -/* User-provided signal handlers */ -typedef void (*arch_sighandler_t) (int, SIGCONTEXT); -static union -{ - arch_sighandler_t old; - void (*rt) (int, struct siginfo *, struct ucontext *); -} sighandler[NSIG] = { [1 ... NSIG - 1] = { (arch_sighandler_t) SIG_ERR } }; - -/* The wrapper around user-provided signal handlers */ -static void pthread_sighandler(int signo, SIGCONTEXT ctx) -{ - pthread_descr self; - char * in_sighandler; - self = thread_self(); - /* If we're in a sigwait operation, just record the signal received - and return without calling the user's handler */ - if (THREAD_GETMEM(self, p_sigwaiting)) { - THREAD_SETMEM(self, p_sigwaiting, 0); - THREAD_SETMEM(self, p_signal, signo); - return; - } - /* Record that we're in a signal handler and call the user's - handler function */ - in_sighandler = THREAD_GETMEM(self, p_in_sighandler); - if (in_sighandler == NULL) - THREAD_SETMEM(self, p_in_sighandler, CURRENT_STACK_FRAME); - CALL_SIGHANDLER(sighandler[signo].old, signo, ctx); - if (in_sighandler == NULL) - THREAD_SETMEM(self, p_in_sighandler, NULL); -} - -/* The same, this time for real-time signals. */ -static void pthread_sighandler_rt(int signo, struct siginfo *si, - struct ucontext *uc) -{ - pthread_descr self; - char * in_sighandler; - self = thread_self(); - /* If we're in a sigwait operation, just record the signal received - and return without calling the user's handler */ - if (THREAD_GETMEM(self, p_sigwaiting)) { - THREAD_SETMEM(self, p_sigwaiting, 0); - THREAD_SETMEM(self, p_signal, signo); - return; - } - /* Record that we're in a signal handler and call the user's - handler function */ - in_sighandler = THREAD_GETMEM(self, p_in_sighandler); - if (in_sighandler == NULL) - THREAD_SETMEM(self, p_in_sighandler, CURRENT_STACK_FRAME); - sighandler[signo].rt(signo, si, uc); - if (in_sighandler == NULL) - THREAD_SETMEM(self, p_in_sighandler, NULL); -} - -/* The wrapper around sigaction. Install our own signal handler - around the signal. */ -int __sigaction(int sig, const struct sigaction * act, - struct sigaction * oact) -{ - struct sigaction newact; - struct sigaction *newactp; - - if (sig == __pthread_sig_restart || - sig == __pthread_sig_cancel || - (sig == __pthread_sig_debug && __pthread_sig_debug > 0)) - { - __set_errno (EINVAL); - return -1; - } - if (act) - { - newact = *act; - if (act->sa_handler != SIG_IGN && act->sa_handler != SIG_DFL - && sig > 0 && sig < NSIG) - { - if (act->sa_flags & SA_SIGINFO) - newact.sa_handler = (__sighandler_t) pthread_sighandler_rt; - else - newact.sa_handler = (__sighandler_t) pthread_sighandler; - } - newactp = &newact; - } - else - newactp = NULL; - if (__libc_sigaction(sig, newactp, oact) == -1) - return -1; - if (sig > 0 && sig < NSIG) - { - if (oact != NULL - /* We may have inherited SIG_IGN from the parent, so return the - kernel's idea of the signal handler the first time - through. */ - && (__sighandler_t) sighandler[sig].old != SIG_ERR) - oact->sa_handler = (__sighandler_t) sighandler[sig].old; - if (act) - /* For the assignment it does not matter whether it's a normal - or real-time signal. */ - sighandler[sig].old = (arch_sighandler_t) act->sa_handler; - } - return 0; -} -strong_alias(__sigaction, sigaction) - -/* A signal handler that does nothing */ -static void pthread_null_sighandler(int sig) { } - -/* sigwait -- synchronously wait for a signal */ -int sigwait(const sigset_t * set, int * sig) -{ - volatile pthread_descr self = thread_self(); - sigset_t mask; - int s; - sigjmp_buf jmpbuf; - struct sigaction sa; - - /* Get ready to block all signals except those in set - and the cancellation signal. - Also check that handlers are installed on all signals in set, - and if not, install our dummy handler. This is conformant to - POSIX: "The effect of sigwait() on the signal actions for the - signals in set is unspecified." */ - sigfillset(&mask); - sigdelset(&mask, __pthread_sig_cancel); - for (s = 1; s < NSIG; s++) { - if (sigismember(set, s) && - s != __pthread_sig_restart && - s != __pthread_sig_cancel && - s != __pthread_sig_debug) { - sigdelset(&mask, s); - if (sighandler[s].old == (arch_sighandler_t) SIG_ERR || - sighandler[s].old == (arch_sighandler_t) SIG_DFL || - sighandler[s].old == (arch_sighandler_t) SIG_IGN) { - sa.sa_handler = pthread_null_sighandler; - sigfillset(&sa.sa_mask); - sa.sa_flags = 0; - sigaction(s, &sa, NULL); - } - } - } - /* Test for cancellation */ - if (sigsetjmp(jmpbuf, 1) == 0) { - THREAD_SETMEM(self, p_cancel_jmp, &jmpbuf); - if (! (THREAD_GETMEM(self, p_canceled) - && THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE)) { - /* Reset the signal count */ - THREAD_SETMEM(self, p_signal, 0); - /* Say we're in sigwait */ - THREAD_SETMEM(self, p_sigwaiting, 1); - /* Unblock the signals and wait for them */ - sigsuspend(&mask); - } - } - THREAD_SETMEM(self, p_cancel_jmp, NULL); - /* The signals are now reblocked. Check for cancellation */ - pthread_testcancel(); - /* We should have self->p_signal != 0 and equal to the signal received */ - *sig = THREAD_GETMEM(self, p_signal); - return 0; -} - -/* Redefine raise() to send signal to calling thread only, - as per POSIX 1003.1c */ -int raise (int sig) -{ - int retcode = pthread_kill(pthread_self(), sig); - if (retcode == 0) - return 0; - else { - errno = retcode; - return -1; - } -} diff --git a/newlib/libc/sys/linux/linuxthreads/specific.c b/newlib/libc/sys/linux/linuxthreads/specific.c deleted file mode 100644 index 2dbf2055e..000000000 --- a/newlib/libc/sys/linux/linuxthreads/specific.c +++ /dev/null @@ -1,228 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Thread-specific data */ - -#include <errno.h> -#include <stddef.h> -#include <stdlib.h> -#include "pthread.h" -#include "internals.h" -#include "spinlock.h" -#include "restart.h" -#include <bits/libc-lock.h> - - -/* Table of keys. */ - -static struct pthread_key_struct pthread_keys[PTHREAD_KEYS_MAX] = - { { 0, NULL } }; - -/* For debugging purposes put the maximum number of keys in a variable. */ -const int __linuxthreads_pthread_keys_max = PTHREAD_KEYS_MAX; -const int __linuxthreads_pthread_key_2ndlevel_size = PTHREAD_KEY_2NDLEVEL_SIZE; - -/* Mutex to protect access to pthread_keys */ - -static pthread_mutex_t pthread_keys_mutex = PTHREAD_MUTEX_INITIALIZER; - -/* Create a new key */ - -int __pthread_key_create(pthread_key_t * key, destr_function destr) -{ - int i; - - pthread_mutex_lock(&pthread_keys_mutex); - for (i = 0; i < PTHREAD_KEYS_MAX; i++) { - if (! pthread_keys[i].in_use) { - /* Mark key in use */ - pthread_keys[i].in_use = 1; - pthread_keys[i].destr = destr; - pthread_mutex_unlock(&pthread_keys_mutex); - *key = i; - return 0; - } - } - pthread_mutex_unlock(&pthread_keys_mutex); - return EAGAIN; -} -strong_alias (__pthread_key_create, pthread_key_create) - -/* Reset deleted key's value to NULL in each live thread. - * NOTE: this executes in the context of the thread manager! */ - -struct pthread_key_delete_helper_args { - /* Damn, we need lexical closures in C! ;) */ - unsigned int idx1st, idx2nd; - pthread_descr self; -}; - -static void pthread_key_delete_helper(void *arg, pthread_descr th) -{ - struct pthread_key_delete_helper_args *args = arg; - unsigned int idx1st = args->idx1st; - unsigned int idx2nd = args->idx2nd; - pthread_descr self = args->self; - - if (self == 0) - self = args->self = thread_self(); - - if (!th->p_terminated) { - /* pthread_exit() may try to free th->p_specific[idx1st] concurrently. */ - __pthread_lock(THREAD_GETMEM(th, p_lock), self); - if (th->p_specific[idx1st] != NULL) - th->p_specific[idx1st][idx2nd] = NULL; - __pthread_unlock(THREAD_GETMEM(th, p_lock)); - } -} - -/* Delete a key */ -int pthread_key_delete(pthread_key_t key) -{ - pthread_descr self = thread_self(); - - pthread_mutex_lock(&pthread_keys_mutex); - if (key >= PTHREAD_KEYS_MAX || !pthread_keys[key].in_use) { - pthread_mutex_unlock(&pthread_keys_mutex); - return EINVAL; - } - pthread_keys[key].in_use = 0; - pthread_keys[key].destr = NULL; - - /* Set the value of the key to NULL in all running threads, so - that if the key is reallocated later by pthread_key_create, its - associated values will be NULL in all threads. - - Do nothing if no threads have been created yet. */ - - if (__pthread_manager_request != -1) - { - struct pthread_key_delete_helper_args args; - struct pthread_request request; - - args.idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE; - args.idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE; - args.self = 0; - - request.req_thread = self; - request.req_kind = REQ_FOR_EACH_THREAD; - request.req_args.for_each.arg = &args; - request.req_args.for_each.fn = pthread_key_delete_helper; - - TEMP_FAILURE_RETRY(__libc_write(__pthread_manager_request, - (char *) &request, sizeof(request))); - suspend(self); - } - - pthread_mutex_unlock(&pthread_keys_mutex); - return 0; -} - -/* Set the value of a key */ - -int __pthread_setspecific(pthread_key_t key, const void * pointer) -{ - pthread_descr self = thread_self(); - unsigned int idx1st, idx2nd; - - if (key >= PTHREAD_KEYS_MAX || !pthread_keys[key].in_use) - return EINVAL; - idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE; - idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE; - if (THREAD_GETMEM_NC(self, p_specific[idx1st]) == NULL) { - void *newp = calloc(PTHREAD_KEY_2NDLEVEL_SIZE, sizeof (void *)); - if (newp == NULL) - return ENOMEM; - THREAD_SETMEM_NC(self, p_specific[idx1st], newp); - } - THREAD_GETMEM_NC(self, p_specific[idx1st])[idx2nd] = (void *) pointer; - return 0; -} -strong_alias (__pthread_setspecific, pthread_setspecific) - -/* Get the value of a key */ - -void * __pthread_getspecific(pthread_key_t key) -{ - pthread_descr self = thread_self(); - unsigned int idx1st, idx2nd; - - if (key >= PTHREAD_KEYS_MAX) - return NULL; - idx1st = key / PTHREAD_KEY_2NDLEVEL_SIZE; - idx2nd = key % PTHREAD_KEY_2NDLEVEL_SIZE; - if (THREAD_GETMEM_NC(self, p_specific[idx1st]) == NULL - || !pthread_keys[key].in_use) - return NULL; - return THREAD_GETMEM_NC(self, p_specific[idx1st])[idx2nd]; -} -strong_alias (__pthread_getspecific, pthread_getspecific) - -/* Call the destruction routines on all keys */ - -void __pthread_destroy_specifics() -{ - pthread_descr self = thread_self(); - int i, j, round, found_nonzero; - destr_function destr; - void * data; - - for (round = 0, found_nonzero = 1; - found_nonzero && round < PTHREAD_DESTRUCTOR_ITERATIONS; - round++) { - found_nonzero = 0; - for (i = 0; i < PTHREAD_KEY_1STLEVEL_SIZE; i++) - if (THREAD_GETMEM_NC(self, p_specific[i]) != NULL) - for (j = 0; j < PTHREAD_KEY_2NDLEVEL_SIZE; j++) { - destr = pthread_keys[i * PTHREAD_KEY_2NDLEVEL_SIZE + j].destr; - data = THREAD_GETMEM_NC(self, p_specific[i])[j]; - if (destr != NULL && data != NULL) { - THREAD_GETMEM_NC(self, p_specific[i])[j] = NULL; - destr(data); - found_nonzero = 1; - } - } - } - __pthread_lock(THREAD_GETMEM(self, p_lock), self); - for (i = 0; i < PTHREAD_KEY_1STLEVEL_SIZE; i++) { - if (THREAD_GETMEM_NC(self, p_specific[i]) != NULL) { - free(THREAD_GETMEM_NC(self, p_specific[i])); - THREAD_SETMEM_NC(self, p_specific[i], NULL); - } - } - __pthread_unlock(THREAD_GETMEM(self, p_lock)); -} - -/* Thread-specific data for libc. */ - -static int -libc_internal_tsd_set(enum __libc_tsd_key_t key, const void * pointer) -{ - pthread_descr self = thread_self(); - - THREAD_SETMEM_NC(self, p_libc_specific[key], (void *) pointer); - return 0; -} -int (*__libc_internal_tsd_set)(enum __libc_tsd_key_t key, const void * pointer) - = libc_internal_tsd_set; - -static void * -libc_internal_tsd_get(enum __libc_tsd_key_t key) -{ - pthread_descr self = thread_self(); - - return THREAD_GETMEM_NC(self, p_libc_specific[key]); -} -void * (*__libc_internal_tsd_get)(enum __libc_tsd_key_t key) - = libc_internal_tsd_get; diff --git a/newlib/libc/sys/linux/linuxthreads/spinlock.c b/newlib/libc/sys/linux/linuxthreads/spinlock.c deleted file mode 100644 index 3e1682599..000000000 --- a/newlib/libc/sys/linux/linuxthreads/spinlock.c +++ /dev/null @@ -1,774 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1998 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -/* Internal locks */ - -#include <errno.h> -#include <sched.h> -#include <time.h> -#include <stdlib.h> -#include <limits.h> -#include "pthread.h" -#include "internals.h" -#include "spinlock.h" -#include "restart.h" - -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP -static void __pthread_acquire(int * spinlock); - -static inline void __pthread_release(int * spinlock) -{ - WRITE_MEMORY_BARRIER(); - *spinlock = __LT_SPINLOCK_INIT; - __asm __volatile ("" : "=m" (*spinlock) : "0" (*spinlock)); -} -#endif - - -/* The status field of a spinlock is a pointer whose least significant - bit is a locked flag. - - Thus the field values have the following meanings: - - status == 0: spinlock is free - status == 1: spinlock is taken; no thread is waiting on it - - (status & 1) == 1: spinlock is taken and (status & ~1L) is a - pointer to the first waiting thread; other - waiting threads are linked via the p_nextlock - field. - (status & 1) == 0: same as above, but spinlock is not taken. - - The waiting list is not sorted by priority order. - Actually, we always insert at top of list (sole insertion mode - that can be performed without locking). - For __pthread_unlock, we perform a linear search in the list - to find the highest-priority, oldest waiting thread. - This is safe because there are no concurrent __pthread_unlock - operations -- only the thread that locked the mutex can unlock it. */ - - -void internal_function __pthread_lock(struct _pthread_fastlock * lock, - pthread_descr self) -{ -#if defined HAS_COMPARE_AND_SWAP - long oldstatus, newstatus; - int successful_seizure, spurious_wakeup_count; - int spin_count; -#endif - -#if defined TEST_FOR_COMPARE_AND_SWAP - if (!__pthread_has_cas) -#endif -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - { - __pthread_acquire(&lock->__spinlock); - return; - } -#endif - -#if defined HAS_COMPARE_AND_SWAP - /* First try it without preparation. Maybe it's a completely - uncontested lock. */ - if (lock->__status == 0 && __compare_and_swap (&lock->__status, 0, 1)) - return; - - spurious_wakeup_count = 0; - spin_count = 0; - -again: - - /* On SMP, try spinning to get the lock. */ - - if (__pthread_smp_kernel) { - int max_count = lock->__spinlock * 2 + 10; - - if (max_count > MAX_ADAPTIVE_SPIN_COUNT) - max_count = MAX_ADAPTIVE_SPIN_COUNT; - - for (spin_count = 0; spin_count < max_count; spin_count++) { - if (((oldstatus = lock->__status) & 1) == 0) { - if(__compare_and_swap(&lock->__status, oldstatus, oldstatus | 1)) - { - if (spin_count) - lock->__spinlock += (spin_count - lock->__spinlock) / 8; - READ_MEMORY_BARRIER(); - return; - } - } -#ifdef BUSY_WAIT_NOP - BUSY_WAIT_NOP; -#endif - __asm __volatile ("" : "=m" (lock->__status) : "0" (lock->__status)); - } - - lock->__spinlock += (spin_count - lock->__spinlock) / 8; - } - - /* No luck, try once more or suspend. */ - - do { - oldstatus = lock->__status; - successful_seizure = 0; - - if ((oldstatus & 1) == 0) { - newstatus = oldstatus | 1; - successful_seizure = 1; - } else { - if (self == NULL) - self = thread_self(); - newstatus = (long) self | 1; - } - - if (self != NULL) { - THREAD_SETMEM(self, p_nextlock, (pthread_descr) (oldstatus & ~1L)); - /* Make sure the store in p_nextlock completes before performing - the compare-and-swap */ - MEMORY_BARRIER(); - } - } while(! __compare_and_swap(&lock->__status, oldstatus, newstatus)); - - /* Suspend with guard against spurious wakeup. - This can happen in pthread_cond_timedwait_relative, when the thread - wakes up due to timeout and is still on the condvar queue, and then - locks the queue to remove itself. At that point it may still be on the - queue, and may be resumed by a condition signal. */ - - if (!successful_seizure) { - for (;;) { - suspend(self); - if (self->p_nextlock != NULL) { - /* Count resumes that don't belong to us. */ - spurious_wakeup_count++; - continue; - } - break; - } - goto again; - } - - /* Put back any resumes we caught that don't belong to us. */ - while (spurious_wakeup_count--) - restart(self); - - READ_MEMORY_BARRIER(); -#endif -} - -int __pthread_unlock(struct _pthread_fastlock * lock) -{ -#if defined HAS_COMPARE_AND_SWAP - long oldstatus; - pthread_descr thr, * ptr, * maxptr; - int maxprio; -#endif - -#if defined TEST_FOR_COMPARE_AND_SWAP - if (!__pthread_has_cas) -#endif -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - { - __pthread_release(&lock->__spinlock); - return 0; - } -#endif - -#if defined HAS_COMPARE_AND_SWAP - WRITE_MEMORY_BARRIER(); - -again: - while ((oldstatus = lock->__status) == 1) { - if (__compare_and_swap_with_release_semantics(&lock->__status, - oldstatus, 0)) - return 0; - } - - /* Find thread in waiting queue with maximal priority */ - ptr = (pthread_descr *) &lock->__status; - thr = (pthread_descr) (oldstatus & ~1L); - maxprio = 0; - maxptr = ptr; - - /* Before we iterate over the wait queue, we need to execute - a read barrier, otherwise we may read stale contents of nodes that may - just have been inserted by other processors. One read barrier is enough to - ensure we have a stable list; we don't need one for each pointer chase - through the list, because we are the owner of the lock; other threads - can only add nodes at the front; if a front node is consistent, - the ones behind it must also be. */ - - READ_MEMORY_BARRIER(); - - while (thr != 0) { - if (thr->p_priority >= maxprio) { - maxptr = ptr; - maxprio = thr->p_priority; - } - ptr = &(thr->p_nextlock); - thr = *ptr; - } - - /* Remove max prio thread from waiting list. */ - if (maxptr == (pthread_descr *) &lock->__status) { - /* If max prio thread is at head, remove it with compare-and-swap - to guard against concurrent lock operation. This removal - also has the side effect of marking the lock as released - because the new status comes from thr->p_nextlock whose - least significant bit is clear. */ - thr = (pthread_descr) (oldstatus & ~1L); - if (! __compare_and_swap_with_release_semantics - (&lock->__status, oldstatus, (long)(thr->p_nextlock))) - goto again; - } else { - /* No risk of concurrent access, remove max prio thread normally. - But in this case we must also flip the least significant bit - of the status to mark the lock as released. */ - thr = *maxptr; - *maxptr = thr->p_nextlock; - - /* Ensure deletion from linked list completes before we - release the lock. */ - WRITE_MEMORY_BARRIER(); - - do { - oldstatus = lock->__status; - } while (!__compare_and_swap_with_release_semantics(&lock->__status, - oldstatus, oldstatus & ~1L)); - } - - /* Wake up the selected waiting thread. Woken thread can check - its own p_nextlock field for NULL to detect that it has been removed. No - barrier is needed here, since restart() and suspend() take - care of memory synchronization. */ - - thr->p_nextlock = NULL; - restart(thr); - - return 0; -#endif -} - -/* - * Alternate fastlocks do not queue threads directly. Instead, they queue - * these wait queue node structures. When a timed wait wakes up due to - * a timeout, it can leave its wait node in the queue (because there - * is no safe way to remove from the quue). Some other thread will - * deallocate the abandoned node. - */ - - -struct wait_node { - struct wait_node *next; /* Next node in null terminated linked list */ - pthread_descr thr; /* The thread waiting with this node */ - int abandoned; /* Atomic flag */ -}; - -static long wait_node_free_list; -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP -static int wait_node_free_list_spinlock; -#endif - -/* Allocate a new node from the head of the free list using an atomic - operation, or else using malloc if that list is empty. A fundamental - assumption here is that we can safely access wait_node_free_list->next. - That's because we never free nodes once we allocate them, so a pointer to a - node remains valid indefinitely. */ - -static struct wait_node *wait_node_alloc(void) -{ -#if defined HAS_COMPARE_AND_SWAP - long oldvalue, newvalue; -#endif - -#if defined TEST_FOR_COMPARE_AND_SWAP - if (!__pthread_has_cas) -#endif -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - { - struct wait_node *new_node = 0; - - __pthread_acquire(&wait_node_free_list_spinlock); - if (wait_node_free_list != 0) { - new_node = (struct wait_node *) wait_node_free_list; - wait_node_free_list = (long) new_node->next; - } - WRITE_MEMORY_BARRIER(); - wait_node_free_list_spinlock = 0; - - if (new_node == 0) - return malloc(sizeof *wait_node_alloc()); - - return new_node; - } -#endif - -#if defined HAS_COMPARE_AND_SWAP - do { - oldvalue = wait_node_free_list; - - if (oldvalue == 0) - return malloc(sizeof *wait_node_alloc()); - - /* Ensure we don't read stale next link through oldvalue pointer. */ - READ_MEMORY_BARRIER(); - newvalue = (long) ((struct wait_node *) oldvalue)->next; - } while (! __compare_and_swap(&wait_node_free_list, oldvalue, newvalue)); - - return (struct wait_node *) oldvalue; -#endif -} - -/* Return a node to the head of the free list using an atomic - operation. */ - -static void wait_node_free(struct wait_node *wn) -{ -#if defined HAS_COMPARE_AND_SWAP - long oldvalue, newvalue; -#endif - -#if defined TEST_FOR_COMPARE_AND_SWAP - if (!__pthread_has_cas) -#endif -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - { - __pthread_acquire(&wait_node_free_list_spinlock); - wn->next = (struct wait_node *) wait_node_free_list; - wait_node_free_list = (long) wn; - WRITE_MEMORY_BARRIER(); - wait_node_free_list_spinlock = 0; - return; - } -#endif - -#if defined HAS_COMPARE_AND_SWAP - do { - oldvalue = wait_node_free_list; - wn->next = (struct wait_node *) oldvalue; - newvalue = (long) wn; - /* Ensure node contents are written before we swap it into the list. */ - WRITE_MEMORY_BARRIER(); - } while (! __compare_and_swap(&wait_node_free_list, oldvalue, newvalue)); -#endif -} - -#if defined HAS_COMPARE_AND_SWAP - -/* Remove a wait node from the specified queue. It is assumed - that the removal takes place concurrently with only atomic insertions at the - head of the queue. */ - -static void wait_node_dequeue(struct wait_node **pp_head, - struct wait_node **pp_node, - struct wait_node *p_node) -{ - /* If the node is being deleted from the head of the - list, it must be deleted using atomic compare-and-swap. - Otherwise it can be deleted in the straightforward way. */ - - if (pp_node == pp_head) { - /* We don't need a read barrier between these next two loads, - because it is assumed that the caller has already ensured - the stability of *p_node with respect to p_node. */ - - long oldvalue = (long) p_node; - long newvalue = (long) p_node->next; - - if (__compare_and_swap((long *) pp_node, oldvalue, newvalue)) - return; - - /* Oops! Compare and swap failed, which means the node is - no longer first. We delete it using the ordinary method. But we don't - know the identity of the node which now holds the pointer to the node - being deleted, so we must search from the beginning. */ - - for (pp_node = pp_head; p_node != *pp_node; ) { - pp_node = &(*pp_node)->next; - READ_MEMORY_BARRIER(); /* Stabilize *pp_node for next iteration. */ - } - } - - *pp_node = p_node->next; - return; -} - -#endif - -void __pthread_alt_lock(struct _pthread_fastlock * lock, - pthread_descr self) -{ -#if defined HAS_COMPARE_AND_SWAP - long oldstatus, newstatus; -#endif - struct wait_node wait_node; - -#if defined TEST_FOR_COMPARE_AND_SWAP - if (!__pthread_has_cas) -#endif -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - { - int suspend_needed = 0; - __pthread_acquire(&lock->__spinlock); - - if (lock->__status == 0) - lock->__status = 1; - else { - if (self == NULL) - self = thread_self(); - - wait_node.abandoned = 0; - wait_node.next = (struct wait_node *) lock->__status; - wait_node.thr = self; - lock->__status = (long) &wait_node; - suspend_needed = 1; - } - - __pthread_release(&lock->__spinlock); - - if (suspend_needed) - suspend (self); - return; - } -#endif - -#if defined HAS_COMPARE_AND_SWAP - do { - oldstatus = lock->__status; - if (oldstatus == 0) { - newstatus = 1; - } else { - if (self == NULL) - self = thread_self(); - wait_node.thr = self; - newstatus = (long) &wait_node; - } - wait_node.abandoned = 0; - wait_node.next = (struct wait_node *) oldstatus; - /* Make sure the store in wait_node.next completes before performing - the compare-and-swap */ - MEMORY_BARRIER(); - } while(! __compare_and_swap(&lock->__status, oldstatus, newstatus)); - - /* Suspend. Note that unlike in __pthread_lock, we don't worry - here about spurious wakeup. That's because this lock is not - used in situations where that can happen; the restart can - only come from the previous lock owner. */ - - if (oldstatus != 0) - suspend(self); - - READ_MEMORY_BARRIER(); -#endif -} - -/* Timed-out lock operation; returns 0 to indicate timeout. */ - -int __pthread_alt_timedlock(struct _pthread_fastlock * lock, - pthread_descr self, const struct timespec *abstime) -{ - long oldstatus = 0; -#if defined HAS_COMPARE_AND_SWAP - long newstatus; -#endif - struct wait_node *p_wait_node = wait_node_alloc(); - - /* Out of memory, just give up and do ordinary lock. */ - if (p_wait_node == 0) { - __pthread_alt_lock(lock, self); - return 1; - } - -#if defined TEST_FOR_COMPARE_AND_SWAP - if (!__pthread_has_cas) -#endif -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - { - __pthread_acquire(&lock->__spinlock); - - if (lock->__status == 0) - lock->__status = 1; - else { - if (self == NULL) - self = thread_self(); - - p_wait_node->abandoned = 0; - p_wait_node->next = (struct wait_node *) lock->__status; - p_wait_node->thr = self; - lock->__status = (long) p_wait_node; - oldstatus = 1; /* force suspend */ - } - - __pthread_release(&lock->__spinlock); - goto suspend; - } -#endif - -#if defined HAS_COMPARE_AND_SWAP - do { - oldstatus = lock->__status; - if (oldstatus == 0) { - newstatus = 1; - } else { - if (self == NULL) - self = thread_self(); - p_wait_node->thr = self; - newstatus = (long) p_wait_node; - } - p_wait_node->abandoned = 0; - p_wait_node->next = (struct wait_node *) oldstatus; - /* Make sure the store in wait_node.next completes before performing - the compare-and-swap */ - MEMORY_BARRIER(); - } while(! __compare_and_swap(&lock->__status, oldstatus, newstatus)); -#endif - -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - suspend: -#endif - - /* If we did not get the lock, do a timed suspend. If we wake up due - to a timeout, then there is a race; the old lock owner may try - to remove us from the queue. This race is resolved by us and the owner - doing an atomic testandset() to change the state of the wait node from 0 - to 1. If we succeed, then it's a timeout and we abandon the node in the - queue. If we fail, it means the owner gave us the lock. */ - - if (oldstatus != 0) { - if (timedsuspend(self, abstime) == 0) { - if (!testandset(&p_wait_node->abandoned)) - return 0; /* Timeout! */ - - /* Eat oustanding resume from owner, otherwise wait_node_free() below - will race with owner's wait_node_dequeue(). */ - suspend(self); - } - } - - wait_node_free(p_wait_node); - - READ_MEMORY_BARRIER(); - - return 1; /* Got the lock! */ -} - -void __pthread_alt_unlock(struct _pthread_fastlock *lock) -{ - struct wait_node *p_node, **pp_node, *p_max_prio, **pp_max_prio; - struct wait_node ** const pp_head = (struct wait_node **) &lock->__status; - int maxprio; - - WRITE_MEMORY_BARRIER(); - -#if defined TEST_FOR_COMPARE_AND_SWAP - if (!__pthread_has_cas) -#endif -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - { - __pthread_acquire(&lock->__spinlock); - } -#endif - - while (1) { - - /* If no threads are waiting for this lock, try to just - atomically release it. */ -#if defined TEST_FOR_COMPARE_AND_SWAP - if (!__pthread_has_cas) -#endif -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - { - if (lock->__status == 0 || lock->__status == 1) { - lock->__status = 0; - break; - } - } -#endif - -#if defined TEST_FOR_COMPARE_AND_SWAP - else -#endif - -#if defined HAS_COMPARE_AND_SWAP - { - long oldstatus = lock->__status; - if (oldstatus == 0 || oldstatus == 1) { - if (__compare_and_swap_with_release_semantics (&lock->__status, oldstatus, 0)) - break; - else - continue; - } - } -#endif - - /* Process the entire queue of wait nodes. Remove all abandoned - wait nodes and put them into the global free queue, and - remember the one unabandoned node which refers to the thread - having the highest priority. */ - - pp_max_prio = pp_node = pp_head; - p_max_prio = p_node = *pp_head; - maxprio = INT_MIN; - - READ_MEMORY_BARRIER(); /* Prevent access to stale data through p_node */ - - while (p_node != (struct wait_node *) 1) { - int prio; - - if (p_node->abandoned) { - /* Remove abandoned node. */ -#if defined TEST_FOR_COMPARE_AND_SWAP - if (!__pthread_has_cas) -#endif -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - *pp_node = p_node->next; -#endif -#if defined TEST_FOR_COMPARE_AND_SWAP - else -#endif -#if defined HAS_COMPARE_AND_SWAP - wait_node_dequeue(pp_head, pp_node, p_node); -#endif - wait_node_free(p_node); - /* Note that the next assignment may take us to the beginning - of the queue, to newly inserted nodes, if pp_node == pp_head. - In that case we need a memory barrier to stabilize the first of - these new nodes. */ - p_node = *pp_node; - if (pp_node == pp_head) - READ_MEMORY_BARRIER(); /* No stale reads through p_node */ - continue; - } else if ((prio = p_node->thr->p_priority) >= maxprio) { - /* Otherwise remember it if its thread has a higher or equal priority - compared to that of any node seen thus far. */ - maxprio = prio; - pp_max_prio = pp_node; - p_max_prio = p_node; - } - - /* This canno6 jump backward in the list, so no further read - barrier is needed. */ - pp_node = &p_node->next; - p_node = *pp_node; - } - - /* If all threads abandoned, go back to top */ - if (maxprio == INT_MIN) - continue; - - ASSERT (p_max_prio != (struct wait_node *) 1); - - /* Now we want to to remove the max priority thread's wait node from - the list. Before we can do this, we must atomically try to change the - node's abandon state from zero to nonzero. If we succeed, that means we - have the node that we will wake up. If we failed, then it means the - thread timed out and abandoned the node in which case we repeat the - whole unlock operation. */ - - if (!testandset(&p_max_prio->abandoned)) { -#if defined TEST_FOR_COMPARE_AND_SWAP - if (!__pthread_has_cas) -#endif -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - *pp_max_prio = p_max_prio->next; -#endif -#if defined TEST_FOR_COMPARE_AND_SWAP - else -#endif -#if defined HAS_COMPARE_AND_SWAP - wait_node_dequeue(pp_head, pp_max_prio, p_max_prio); -#endif - restart(p_max_prio->thr); - break; - } - } - -#if defined TEST_FOR_COMPARE_AND_SWAP - if (!__pthread_has_cas) -#endif -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - { - __pthread_release(&lock->__spinlock); - } -#endif -} - - -/* Compare-and-swap emulation with a spinlock */ - -#ifdef TEST_FOR_COMPARE_AND_SWAP -int __pthread_has_cas = 0; -#endif - -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - -int __pthread_compare_and_swap(long * ptr, long oldval, long newval, - int * spinlock) -{ - int res; - - __pthread_acquire(spinlock); - - if (*ptr == oldval) { - *ptr = newval; res = 1; - } else { - res = 0; - } - - __pthread_release(spinlock); - - return res; -} - -/* This function is called if the inlined test-and-set - in __pthread_compare_and_swap() failed */ - -/* The retry strategy is as follows: - - We test and set the spinlock MAX_SPIN_COUNT times, calling - sched_yield() each time. This gives ample opportunity for other - threads with priority >= our priority to make progress and - release the spinlock. - - If a thread with priority < our priority owns the spinlock, - calling sched_yield() repeatedly is useless, since we're preventing - the owning thread from making progress and releasing the spinlock. - So, after MAX_SPIN_LOCK attemps, we suspend the calling thread - using nanosleep(). This again should give time to the owning thread - for releasing the spinlock. - Notice that the nanosleep() interval must not be too small, - since the kernel does busy-waiting for short intervals in a realtime - process (!). The smallest duration that guarantees thread - suspension is currently 2ms. - - When nanosleep() returns, we try again, doing MAX_SPIN_COUNT - sched_yield(), then sleeping again if needed. */ - -static void __pthread_acquire(int * spinlock) -{ - int cnt = 0; - struct timespec tm; - - READ_MEMORY_BARRIER(); - - while (testandset(spinlock)) { - if (cnt < MAX_SPIN_COUNT) { - sched_yield(); - cnt++; - } else { - tm.tv_sec = 0; - tm.tv_nsec = SPIN_SLEEP_DURATION; - nanosleep(&tm, NULL); - cnt = 0; - } - } -} - -#endif diff --git a/newlib/libc/sys/linux/linuxthreads/spinlock.h b/newlib/libc/sys/linux/linuxthreads/spinlock.h deleted file mode 100644 index 0ec40c57c..000000000 --- a/newlib/libc/sys/linux/linuxthreads/spinlock.h +++ /dev/null @@ -1,218 +0,0 @@ -/* Linuxthreads - a simple clone()-based implementation of Posix */ -/* threads for Linux. */ -/* Copyright (C) 1998 Xavier Leroy (Xavier.Leroy@inria.fr) */ -/* */ -/* This program is free software; you can redistribute it and/or */ -/* modify it under the terms of the GNU Library General Public License */ -/* as published by the Free Software Foundation; either version 2 */ -/* of the License, or (at your option) any later version. */ -/* */ -/* This program is distributed in the hope that it will be useful, */ -/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ -/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ -/* GNU Library General Public License for more details. */ - -#include <bits/initspin.h> - - -/* There are 2 compare and swap synchronization primitives with - different semantics: - - 1. compare_and_swap, which has acquire semantics (i.e. it - completes befor subsequent writes.) - 2. compare_and_swap_with_release_semantics, which has release - semantics (it completes after previous writes.) - - For those platforms on which they are the same. HAS_COMPARE_AND_SWAP - should be defined. For those platforms on which they are different, - HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS has to be defined. */ - -#ifndef HAS_COMPARE_AND_SWAP -#ifdef HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS -#define HAS_COMPARE_AND_SWAP -#endif -#endif - -#if defined(TEST_FOR_COMPARE_AND_SWAP) - -extern int __pthread_has_cas; -extern int __pthread_compare_and_swap(long * ptr, long oldval, long newval, - int * spinlock); - -static inline int compare_and_swap(long * ptr, long oldval, long newval, - int * spinlock) -{ - if (__builtin_expect (__pthread_has_cas, 1)) - return __compare_and_swap(ptr, oldval, newval); - else - return __pthread_compare_and_swap(ptr, oldval, newval, spinlock); -} - -#elif defined(HAS_COMPARE_AND_SWAP) - -#ifdef IMPLEMENT_TAS_WITH_CAS -#define testandset(p) !__compare_and_swap((long int *) p, 0, 1) -#endif - -#ifdef HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS - -static inline int -compare_and_swap_with_release_semantics (long * ptr, long oldval, - long newval, int * spinlock) -{ - return __compare_and_swap_with_release_semantics (ptr, oldval, - newval); -} - -#endif - -static inline int compare_and_swap(long * ptr, long oldval, long newval, - int * spinlock) -{ - return __compare_and_swap(ptr, oldval, newval); -} - -#else - -extern int __pthread_compare_and_swap(long * ptr, long oldval, long newval, - int * spinlock); - -static inline int compare_and_swap(long * ptr, long oldval, long newval, - int * spinlock) -{ - return __pthread_compare_and_swap(ptr, oldval, newval, spinlock); -} - -#endif - -#ifndef HAS_COMPARE_AND_SWAP_WITH_RELEASE_SEMANTICS -#define compare_and_swap_with_release_semantics compare_and_swap -#define __compare_and_swap_with_release_semantics __compare_and_swap -#endif - -/* Internal locks */ - -extern void internal_function __pthread_lock(struct _pthread_fastlock * lock, - pthread_descr self); -extern int __pthread_unlock(struct _pthread_fastlock *lock); - -static inline void __pthread_init_lock(struct _pthread_fastlock * lock) -{ - lock->__status = 0; - lock->__spinlock = __LT_SPINLOCK_INIT; -} - -static inline int __pthread_trylock (struct _pthread_fastlock * lock) -{ -#if defined TEST_FOR_COMPARE_AND_SWAP - if (!__pthread_has_cas) -#endif -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - { - return (testandset(&lock->__spinlock) ? EBUSY : 0); - } -#endif - -#if defined HAS_COMPARE_AND_SWAP - do { - if (lock->__status != 0) return EBUSY; - } while(! __compare_and_swap(&lock->__status, 0, 1)); - return 0; -#endif -} - -/* Variation of internal lock used for pthread_mutex_t, supporting - timed-out waits. Warning: do not mix these operations with the above ones - over the same lock object! */ - -extern void __pthread_alt_lock(struct _pthread_fastlock * lock, - pthread_descr self); - -extern int __pthread_alt_timedlock(struct _pthread_fastlock * lock, - pthread_descr self, const struct timespec *abstime); - -extern void __pthread_alt_unlock(struct _pthread_fastlock *lock); - -static inline void __pthread_alt_init_lock(struct _pthread_fastlock * lock) -{ - lock->__status = 0; - lock->__spinlock = __LT_SPINLOCK_INIT; -} - -static inline int __pthread_alt_trylock (struct _pthread_fastlock * lock) -{ -#if defined TEST_FOR_COMPARE_AND_SWAP - if (!__pthread_has_cas) -#endif -#if !defined HAS_COMPARE_AND_SWAP || defined TEST_FOR_COMPARE_AND_SWAP - { - int res = EBUSY; - - if (testandset(&lock->__spinlock) == 0) - { - if (lock->__status == 0) - { - lock->__status = 1; - WRITE_MEMORY_BARRIER(); - res = 0; - } - lock->__spinlock = __LT_SPINLOCK_INIT; - } - return res; - } -#endif - -#if defined HAS_COMPARE_AND_SWAP - do { - if (lock->__status != 0) return EBUSY; - } while(! compare_and_swap(&lock->__status, 0, 1, &lock->__spinlock)); - return 0; -#endif -} - -/* Operations on pthread_atomic, which is defined in internals.h */ - -static inline long atomic_increment(struct pthread_atomic *pa) -{ - long oldval; - - do { - oldval = pa->p_count; - } while (!compare_and_swap(&pa->p_count, oldval, oldval + 1, &pa->p_spinlock)); - - return oldval; -} - - -static inline long atomic_decrement(struct pthread_atomic *pa) -{ - long oldval; - - do { - oldval = pa->p_count; - } while (!compare_and_swap(&pa->p_count, oldval, oldval - 1, &pa->p_spinlock)); - - return oldval; -} - - -static inline void -__pthread_set_own_extricate_if (pthread_descr self, pthread_extricate_if *peif) -{ - /* Only store a non-null peif if the thread has cancellation enabled. - Otherwise pthread_cancel will unconditionally call the extricate handler, - and restart the thread giving rise to forbidden spurious wakeups. */ - if (peif == NULL - || THREAD_GETMEM(self, p_cancelstate) == PTHREAD_CANCEL_ENABLE) - { - /* If we are removing the extricate interface, we need to synchronize - against pthread_cancel so that it does not continue with a pointer - to a deallocated pthread_extricate_if struct! The thread lock - is (ab)used for this synchronization purpose. */ - if (peif == NULL) - __pthread_lock (THREAD_GETMEM(self, p_lock), self); - THREAD_SETMEM(self, p_extricate, peif); - if (peif == NULL) - __pthread_unlock (THREAD_GETMEM(self, p_lock)); - } -} diff --git a/newlib/libc/sys/linux/linuxthreads/sysctl.c b/newlib/libc/sys/linux/linuxthreads/sysctl.c deleted file mode 100644 index 2512f17f1..000000000 --- a/newlib/libc/sys/linux/linuxthreads/sysctl.c +++ /dev/null @@ -1,43 +0,0 @@ -/* Read or write system information. Linux version. - Copyright (C) 1996, 1997, 1998, 1999, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <errno.h> -#include <sys/sysctl.h> - -#include <machine/syscall.h> - -static _syscall1(int,_sysctl,struct __sysctl_args *,args) - -int -__sysctl (int *name, int nlen, void *oldval, size_t *oldlenp, - void *newval, size_t newlen) -{ - struct __sysctl_args args = - { - name: name, - nlen: nlen, - oldval: oldval, - oldlenp: oldlenp, - newval: newval, - newlen: newlen - }; - - return _sysctl(&args); -} -weak_alias (__sysctl, sysctl) diff --git a/newlib/libc/sys/linux/linuxthreads/td_init.c b/newlib/libc/sys/linux/linuxthreads/td_init.c deleted file mode 100644 index c9d08e9ac..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_init.c +++ /dev/null @@ -1,32 +0,0 @@ -/* Initialization function of thread debugger support library. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - -int __td_debug; - - -td_err_e -td_init (void) -{ - /* XXX We have to figure out what has to be done. */ - LOG ("td_init"); - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_log.c b/newlib/libc/sys/linux/linuxthreads/td_log.c deleted file mode 100644 index 531cf87d3..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_log.c +++ /dev/null @@ -1,32 +0,0 @@ -/* Noop, left for historical reasons. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_log (void) -{ - /* This interface is deprecated in the Sun interface. We provide it - for compatibility but don't do anyhting ourself. We might in - future do some logging if this seems reasonable. */ - LOG ("td_log"); - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_symbol_list.c b/newlib/libc/sys/linux/linuxthreads/td_symbol_list.c deleted file mode 100644 index e64d298f9..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_symbol_list.c +++ /dev/null @@ -1,55 +0,0 @@ -/* Return list of symbols the library can request. - Copyright (C) 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 2001. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <assert.h> -#include <gnu/lib-names.h> -#include "thread_dbP.h" - - -static const char *symbol_list_arr[] = -{ - [PTHREAD_THREADS_EVENTS] = "__pthread_threads_events", - [PTHREAD_LAST_EVENT] = "__pthread_last_event", - [PTHREAD_HANDLES_NUM] = "__pthread_handles_num", - [PTHREAD_HANDLES] = "__pthread_handles", - [PTHREAD_KEYS] = "pthread_keys", - [LINUXTHREADS_PTHREAD_THREADS_MAX] = "__linuxthreads_pthread_threads_max", - [LINUXTHREADS_PTHREAD_KEYS_MAX] = "__linuxthreads_pthread_keys_max", - [LINUXTHREADS_PTHREAD_SIZEOF_DESCR] = "__linuxthreads_pthread_sizeof_descr", - [LINUXTHREADS_CREATE_EVENT] = "__linuxthreads_create_event", - [LINUXTHREADS_DEATH_EVENT] = "__linuxthreads_death_event", - [LINUXTHREADS_REAP_EVENT] = "__linuxthreads_reap_event", - [NUM_MESSAGES] = NULL -}; - - -const char ** -td_symbol_list (void) -{ - return symbol_list_arr; -} - - -int -td_lookup (struct ps_prochandle *ps, int idx, psaddr_t *sym_addr) -{ - assert (idx >= 0 && idx < NUM_MESSAGES); - return ps_pglobal_lookup (ps, LIBPTHREAD_SO, symbol_list_arr[idx], sym_addr); -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_clear_event.c b/newlib/libc/sys/linux/linuxthreads/td_ta_clear_event.c deleted file mode 100644 index 151283394..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_clear_event.c +++ /dev/null @@ -1,53 +0,0 @@ -/* Globally disable events. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_ta_clear_event (ta, event) - const td_thragent_t *ta; - td_thr_events_t *event; -{ - td_thr_events_t old_event; - int i; - - LOG ("td_ta_clear_event"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - /* Write the new value into the thread data structure. */ - if (ps_pdread (ta->ph, ta->pthread_threads_eventsp, - &old_event, sizeof (td_thrhandle_t)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* Remove the set bits in. */ - for (i = 0; i < TD_EVENTSIZE; ++i) - old_event.event_bits[i] &= ~event->event_bits[i]; - - /* Write the new value into the thread data structure. */ - if (ps_pdwrite (ta->ph, ta->pthread_threads_eventsp, - &old_event, sizeof (td_thrhandle_t)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_delete.c b/newlib/libc/sys/linux/linuxthreads/td_ta_delete.c deleted file mode 100644 index 6af436813..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_delete.c +++ /dev/null @@ -1,58 +0,0 @@ -/* Detach to target process. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <stdlib.h> - -#include "thread_dbP.h" - - -td_err_e -td_ta_delete (td_thragent_t *ta) -{ - LOG ("td_ta_delete"); - - /* Safety check. */ - if (ta == NULL || __td_agent_list == NULL) - return TD_BADTA; - - /* Remove the handle from the list. */ - if (ta == __td_agent_list->ta) - /* It's the first element of the list. */ - __td_agent_list = __td_agent_list->next; - else - { - /* We have to search for it. */ - struct agent_list *runp = __td_agent_list; - - while (runp->next != NULL && runp->next->ta != ta) - runp = runp->next; - - if (runp->next == NULL) - /* It's not a valid decriptor since it is not in the list. */ - return TD_BADTA; - - runp->next = runp->next->next; - } - - /* The handle was allocated in `td_ta_new'. */ - free (ta); - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_enable_stats.c b/newlib/libc/sys/linux/linuxthreads/td_ta_enable_stats.c deleted file mode 100644 index 43de1b2e6..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_enable_stats.c +++ /dev/null @@ -1,35 +0,0 @@ -/* Enable collection of statistics for process. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_ta_enable_stats (const td_thragent_t *ta, int enable) -{ - /* XXX We have to figure out what has to be done. */ - LOG ("td_ta_enable_stats"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_event_addr.c b/newlib/libc/sys/linux/linuxthreads/td_ta_event_addr.c deleted file mode 100644 index 8bce35ae8..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_event_addr.c +++ /dev/null @@ -1,73 +0,0 @@ -/* Get event address. - Copyright (C) 1999, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_ta_event_addr (const td_thragent_t *ta, td_event_e event, td_notify_t *addr) -{ - td_err_e res = TD_NOEVENT; - int idx = -1; - - LOG ("td_ta_event_addr"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - switch (event) - { - case TD_CREATE: - idx = LINUXTHREADS_CREATE_EVENT; - break; - - case TD_DEATH: - idx = LINUXTHREADS_DEATH_EVENT; - break; - - case TD_REAP: - idx = LINUXTHREADS_REAP_EVENT; - break; - - default: - /* Event cannot be handled. */ - break; - } - - /* Now get the address. */ - if (idx != -1) - { - psaddr_t taddr; - - if (td_lookup (ta->ph, idx, &taddr) == PS_OK) - { - /* Success, we got the address. */ - addr->type = NOTIFY_BPT; - addr->u.bptaddr = taddr; - - res = TD_OK; - } - else - res = TD_ERR; - } - - return res; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_event_getmsg.c b/newlib/libc/sys/linux/linuxthreads/td_ta_event_getmsg.c deleted file mode 100644 index a4ccba3d0..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_event_getmsg.c +++ /dev/null @@ -1,128 +0,0 @@ -/* Retrieve event. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <stddef.h> -#include <string.h> - -#include "thread_dbP.h" - - -td_err_e -td_ta_event_getmsg (const td_thragent_t *ta, td_event_msg_t *msg) -{ - /* XXX I cannot think of another way but using a static variable. */ - static td_thrhandle_t th; - td_eventbuf_t event; - psaddr_t addr; - - LOG ("td_ta_event_getmsg"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - /* Get the pointer to the thread descriptor with the last event. */ - if (ps_pdread (ta->ph, ta->pthread_last_event, - &addr, sizeof (void *)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* If the pointer is NULL no event occurred. */ - if (addr == 0) - return TD_NOMSG; - - /* Read the even structure from the target. */ - if (ps_pdread (ta->ph, - ((char *) addr - + offsetof (struct _pthread_descr_struct, p_eventbuf)), - &event, sizeof (td_eventbuf_t)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* Check whether an event occurred. */ - if (event.eventnum == TD_EVENT_NONE) - { - /* Oh well, this means the last event was already read. So - we have to look for any other event. */ - struct pthread_handle_struct handles[ta->pthread_threads_max]; - int num; - int i; - - /* Read the number of currently active threads. */ - if (ps_pdread (ta->ph, ta->pthread_handles_num, &num, sizeof (int)) - != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* Now read the handles. */ - if (ps_pdread (ta->ph, ta->handles, handles, - ta->pthread_threads_max * sizeof (handles[0])) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - for (i = 0; i < ta->pthread_threads_max && num > 0; ++i) - { - if (handles[i].h_descr == NULL) - /* No entry here. */ - continue; - - /* First count this active thread. */ - --num; - - if (handles[i].h_descr == addr) - /* We already handled this. */ - continue; - - /* Read the event data for this thread. */ - if (ps_pdread (ta->ph, - ((char *) handles[i].h_descr - + offsetof (struct _pthread_descr_struct, - p_eventbuf)), - &event, sizeof (td_eventbuf_t)) != PS_OK) - return TD_ERR; - - if (event.eventnum != TD_EVENT_NONE) - { - /* We found a thread with an unreported event. */ - addr = handles[i].h_descr; - break; - } - } - - /* If we haven't found any other event signal this to the user. */ - if (event.eventnum == TD_EVENT_NONE) - return TD_NOMSG; - } - - /* Generate the thread descriptor. */ - th.th_ta_p = (td_thragent_t *) ta; - th.th_unique = addr; - - /* Fill the user's data structure. */ - msg->event = event.eventnum; - msg->th_p = &th; - msg->msg.data = (uintptr_t) event.eventdata; - - /* And clear the event message in the target. */ - memset (&event, '\0', sizeof (td_eventbuf_t)); - if (ps_pdwrite (ta->ph, - ((char *) addr - + offsetof (struct _pthread_descr_struct, p_eventbuf)), - &event, sizeof (td_eventbuf_t)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_get_nthreads.c b/newlib/libc/sys/linux/linuxthreads/td_ta_get_nthreads.c deleted file mode 100644 index 839b56be5..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_get_nthreads.c +++ /dev/null @@ -1,42 +0,0 @@ -/* Get the number of threads in the process. - Copyright (C) 1999, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - -td_err_e -td_ta_get_nthreads (const td_thragent_t *ta, int *np) -{ - psaddr_t addr; - - LOG ("td_ta_get_nthreads"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - /* Access the variable `__pthread_handles_num'. */ - if (td_lookup (ta->ph, PTHREAD_HANDLES_NUM, &addr) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - if (ps_pdread (ta->ph, addr, np, sizeof (int)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_get_ph.c b/newlib/libc/sys/linux/linuxthreads/td_ta_get_ph.c deleted file mode 100644 index ffa833d92..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_get_ph.c +++ /dev/null @@ -1,36 +0,0 @@ -/* Get external process handle. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_ta_get_ph (const td_thragent_t *ta, struct ps_prochandle **ph) -{ - LOG ("td_ta_get_ph"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - *ph = ta->ph; - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_get_stats.c b/newlib/libc/sys/linux/linuxthreads/td_ta_get_stats.c deleted file mode 100644 index d2ba342d7..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_get_stats.c +++ /dev/null @@ -1,35 +0,0 @@ -/* Retrieve statistics for process. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_ta_get_stats (const td_thragent_t *ta, td_ta_stats_t *statsp) -{ - /* XXX We have to figure out what has to be done. */ - LOG ("td_ta_get_stats"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_map_id2thr.c b/newlib/libc/sys/linux/linuxthreads/td_ta_map_id2thr.c deleted file mode 100644 index 184f2de2e..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_map_id2thr.c +++ /dev/null @@ -1,66 +0,0 @@ -/* Map thread ID to thread handle. - Copyright (C) 1999, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_ta_map_id2thr (const td_thragent_t *ta, pthread_t pt, td_thrhandle_t *th) -{ - struct pthread_handle_struct phc; - struct _pthread_descr_struct pds; - int pthread_threads_max; - - LOG ("td_ta_map_id2thr"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - /* Make the following expression a bit smaller. */ - pthread_threads_max = ta->pthread_threads_max; - - /* We can compute the entry in the handle array we want. */ - if (ps_pdread (ta->ph, ta->handles + pt % pthread_threads_max, &phc, - sizeof (struct pthread_handle_struct)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* Test whether this entry is in use. */ - if (phc.h_descr == NULL) - return TD_BADTH; - - /* Next test: get the descriptor to see whether this is not an old - thread handle. */ - if (ps_pdread (ta->ph, phc.h_descr, &pds, - sizeof (struct _pthread_descr_struct)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - if (pds.p_tid != pt) - return TD_BADTH; - - if (pds.p_terminated != 0) - return TD_NOTHR; - - /* Create the `td_thrhandle_t' object. */ - th->th_ta_p = (td_thragent_t *) ta; - th->th_unique = phc.h_descr; - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_map_lwp2thr.c b/newlib/libc/sys/linux/linuxthreads/td_ta_map_lwp2thr.c deleted file mode 100644 index 78b9fbb66..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_map_lwp2thr.c +++ /dev/null @@ -1,81 +0,0 @@ -/* Which thread is running on an lwp? - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_ta_map_lwp2thr (const td_thragent_t *ta, lwpid_t lwpid, td_thrhandle_t *th) -{ - int pthread_threads_max = ta->pthread_threads_max; - size_t sizeof_descr = ta->sizeof_descr; - struct pthread_handle_struct phc[pthread_threads_max]; - size_t cnt; -#ifdef ALL_THREADS_STOPPED - int num; -#else -# define num 1 -#endif - - LOG ("td_ta_map_lwp2thr"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - /* Read all the descriptors. */ - if (ps_pdread (ta->ph, ta->handles, phc, - sizeof (struct pthread_handle_struct) * pthread_threads_max) - != PS_OK) - return TD_ERR; /* XXX Other error value? */ - -#ifdef ALL_THREADS_STOPPED - /* Read the number of currently active threads. */ - if (ps_pdread (ta->ph, ta->pthread_handles_num, &num, sizeof (int)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ -#endif - - /* Get the entries one after the other and find out whether the ID - matches. */ - for (cnt = 0; cnt < pthread_threads_max && num > 0; ++cnt) - if (phc[cnt].h_descr != NULL) - { - struct _pthread_descr_struct pds; - -#ifdef ALL_THREADS_STOPPED - /* First count this active thread. */ - --num; -#endif - - if (ps_pdread (ta->ph, phc[cnt].h_descr, &pds, sizeof_descr) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - if ((pds.p_pid ?: ps_getpid (ta->ph)) == lwpid) - { - /* Found it. Now fill in the `td_thrhandle_t' object. */ - th->th_ta_p = (td_thragent_t *) ta; - th->th_unique = phc[cnt].h_descr; - - return TD_OK; - } - } - - return TD_NOLWP; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_new.c b/newlib/libc/sys/linux/linuxthreads/td_ta_new.c deleted file mode 100644 index 7505f53e6..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_new.c +++ /dev/null @@ -1,132 +0,0 @@ -/* Attach to target process. - Copyright (C) 1999, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <stddef.h> -#include <stdlib.h> - -#include "thread_dbP.h" - - -/* Datatype for the list of known thread agents. Normally there will - be exactly one so we don't spend much though on making it fast. */ -struct agent_list *__td_agent_list; - - -td_err_e -td_ta_new (struct ps_prochandle *ps, td_thragent_t **ta) -{ - psaddr_t addr; - struct agent_list *elemp; - - LOG ("td_ta_new"); - - /* Get the global event mask. This is one of the variables which - are new in the thread library to enable debugging. If it is - not available we cannot debug. */ - if (td_lookup (ps, PTHREAD_THREADS_EVENTS, &addr) != PS_OK) - return TD_NOLIBTHREAD; - - /* Fill in the appropriate information. */ - *ta = (td_thragent_t *) malloc (sizeof (td_thragent_t)); - if (*ta == NULL) - return TD_MALLOC; - - /* Store the proc handle which we will pass to the callback functions - back into the debugger. */ - (*ta)->ph = ps; - - /* Remember the address. */ - (*ta)->pthread_threads_eventsp = (td_thr_events_t *) addr; - - /* Get the pointer to the variable pointing to the thread descriptor - with the last event. */ - if (td_lookup (ps, PTHREAD_LAST_EVENT, &(*ta)->pthread_last_event) != PS_OK) - { - free_return: - free (*ta); - return TD_ERR; - } - - /* Get the pointer to the variable containing the number of active - threads. */ - if (td_lookup (ps, PTHREAD_HANDLES_NUM, &(*ta)->pthread_handles_num) - != PS_OK) - goto free_return; - - /* See whether the library contains the necessary symbols. */ - if (td_lookup (ps, PTHREAD_HANDLES, &addr) != PS_OK) - goto free_return; - - (*ta)->handles = (struct pthread_handle_struct *) addr; - - - if (td_lookup (ps, PTHREAD_KEYS, &addr) != PS_OK) - goto free_return; - - /* Cast to the right type. */ - (*ta)->keys = (struct pthread_key_struct *) addr; - - /* Find out about the maximum number of threads. Old implementations - don't provide this information. In this case we assume that the - debug library is compiled with the same values. */ - if (td_lookup (ps, LINUXTHREADS_PTHREAD_THREADS_MAX, &addr) != PS_OK) - (*ta)->pthread_threads_max = PTHREAD_THREADS_MAX; - else - { - if (ps_pdread (ps, addr, &(*ta)->pthread_threads_max, sizeof (int)) - != PS_OK) - goto free_return; - } - - /* Similar for the maximum number of thread local data keys. */ - if (td_lookup (ps, LINUXTHREADS_PTHREAD_KEYS_MAX, &addr) != PS_OK) - (*ta)->pthread_keys_max = PTHREAD_KEYS_MAX; - else - { - if (ps_pdread (ps, addr, &(*ta)->pthread_keys_max, sizeof (int)) - != PS_OK) - goto free_return; - } - - /* And for the size of the second level arrays for the keys. */ - if (td_lookup (ps, LINUXTHREADS_PTHREAD_SIZEOF_DESCR, &addr) != PS_OK) - (*ta)->sizeof_descr = sizeof (struct _pthread_descr_struct); - else - { - if (ps_pdread (ps, addr, &(*ta)->sizeof_descr, sizeof (int)) != PS_OK) - goto free_return; - } - - /* Now add the new agent descriptor to the list. */ - elemp = (struct agent_list *) malloc (sizeof (struct agent_list)); - if (elemp == NULL) - { - /* Argh, now that everything else worked... */ - free (*ta); - return TD_MALLOC; - } - - /* We don't care for thread-safety here. */ - elemp->ta = *ta; - elemp->next = __td_agent_list; - __td_agent_list = elemp; - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_reset_stats.c b/newlib/libc/sys/linux/linuxthreads/td_ta_reset_stats.c deleted file mode 100644 index 533d4c412..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_reset_stats.c +++ /dev/null @@ -1,35 +0,0 @@ -/* Reset statistics. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_ta_reset_stats (const td_thragent_t *ta) -{ - /* XXX We have to figure out what has to be done. */ - LOG ("td_ta_reset_stats"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_set_event.c b/newlib/libc/sys/linux/linuxthreads/td_ta_set_event.c deleted file mode 100644 index 041aaec40..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_set_event.c +++ /dev/null @@ -1,53 +0,0 @@ -/* Globally enable events. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_ta_set_event (ta, event) - const td_thragent_t *ta; - td_thr_events_t *event; -{ - td_thr_events_t old_event; - int i; - - LOG ("td_ta_set_event"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - /* Write the new value into the thread data structure. */ - if (ps_pdread (ta->ph, ta->pthread_threads_eventsp, - &old_event, sizeof (td_thrhandle_t)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* Or the new bits in. */ - for (i = 0; i < TD_EVENTSIZE; ++i) - old_event.event_bits[i] |= event->event_bits[i]; - - /* Write the new value into the thread data structure. */ - if (ps_pdwrite (ta->ph, ta->pthread_threads_eventsp, - &old_event, sizeof (td_thrhandle_t)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_setconcurrency.c b/newlib/libc/sys/linux/linuxthreads/td_ta_setconcurrency.c deleted file mode 100644 index da15a0f61..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_setconcurrency.c +++ /dev/null @@ -1,35 +0,0 @@ -/* Set suggested concurrency level for process. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_ta_setconcurrency (const td_thragent_t *ta, int level) -{ - /* This is something LinuxThreads does not support. */ - LOG ("td_ta_setconcurrency"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - return TD_NOCAPAB; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_thr_iter.c b/newlib/libc/sys/linux/linuxthreads/td_ta_thr_iter.c deleted file mode 100644 index a77186d22..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_thr_iter.c +++ /dev/null @@ -1,142 +0,0 @@ -/* Iterate over a process's threads. - Copyright (C) 1999, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" -#include <alloca.h> - -static int -handle_descr (const td_thragent_t *ta, td_thr_iter_f *callback, - void *cbdata_p, td_thr_state_e state, int ti_pri, - size_t cnt, pthread_descr descr) -{ - struct _pthread_descr_struct pds; - size_t sizeof_descr = ta->sizeof_descr; - td_thrhandle_t th; - - if (ps_pdread (ta->ph, descr, &pds, sizeof_descr) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* The manager thread must be handled special. The descriptor - exists but the thread only gets created when the first - `pthread_create' call is issued. A clear indication that this - happened is when the p_pid field is non-zero. */ - if (cnt == 1 && pds.p_pid == 0) - return TD_OK; - - /* Now test whether this thread matches the specified - conditions. */ - - /* Only if the priority level is as high or higher. */ - if (pds.p_priority < ti_pri) - return TD_OK; - - /* Test the state. - XXX This is incomplete. */ - if (state != TD_THR_ANY_STATE) - return TD_OK; - - /* XXX For now we ignore threads which are not running anymore. - The reason is that gdb tries to get the registers and fails. - In future we should have a special mode of the thread library - in which we keep the process around until the actual join - operation happened. */ - if (pds.p_exited != 0) - return TD_OK; - - /* Yep, it matches. Call the callback function. */ - th.th_ta_p = (td_thragent_t *) ta; - th.th_unique = descr; - if (callback (&th, cbdata_p) != 0) - return TD_DBERR; - - /* All done successfully. */ - return TD_OK; -} - - -td_err_e -td_ta_thr_iter (const td_thragent_t *ta, td_thr_iter_f *callback, - void *cbdata_p, td_thr_state_e state, int ti_pri, - sigset_t *ti_sigmask_p, unsigned int ti_user_flags) -{ - int pthread_threads_max; - struct pthread_handle_struct *phc; - td_err_e result = TD_OK; - int cnt; -#ifdef ALL_THREADS_STOPPED - int num; -#else -# define num 1 -#endif - - LOG ("td_ta_thr_iter"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - pthread_threads_max = ta->pthread_threads_max; - phc = (struct pthread_handle_struct *) alloca (sizeof (phc[0]) - * pthread_threads_max); - - /* First read only the main thread and manager thread information. */ - if (ps_pdread (ta->ph, ta->handles, phc, - sizeof (struct pthread_handle_struct) * 2) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* Now handle these descriptors. */ - result = handle_descr (ta, callback, cbdata_p, state, ti_pri, 0, - phc[0].h_descr); - if (result != TD_OK) - return result; - result = handle_descr (ta, callback, cbdata_p, state, ti_pri, 1, - phc[1].h_descr); - if (result != TD_OK) - return result; - - /* Read all the descriptors. */ - if (ps_pdread (ta->ph, ta->handles + 2, &phc[2], - (sizeof (struct pthread_handle_struct) - * (pthread_threads_max - 2))) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - -#ifdef ALL_THREADS_STOPPED - /* Read the number of currently active threads. */ - if (ps_pdread (ta->ph, ta->pthread_handles_num, &num, sizeof (int)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ -#endif - - /* Now get all descriptors, one after the other. */ - for (cnt = 2; cnt < pthread_threads_max && num > 0; ++cnt) - if (phc[cnt].h_descr != NULL) - { -#ifdef ALL_THREADS_STOPPED - /* First count this active thread. */ - --num; -#endif - - result = handle_descr (ta, callback, cbdata_p, state, ti_pri, cnt, - phc[cnt].h_descr); - if (result != TD_OK) - break; - } - - return result; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_ta_tsd_iter.c b/newlib/libc/sys/linux/linuxthreads/td_ta_tsd_iter.c deleted file mode 100644 index 92ceb1f28..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_ta_tsd_iter.c +++ /dev/null @@ -1,55 +0,0 @@ -/* Iterate over a process's thread-specific data. - Copyright (C) 1999, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" -#include <alloca.h> - -td_err_e -td_ta_tsd_iter (const td_thragent_t *ta, td_key_iter_f *callback, - void *cbdata_p) -{ - struct pthread_key_struct *keys; - int pthread_keys_max; - int cnt; - - LOG ("td_ta_tsd_iter"); - - /* Test whether the TA parameter is ok. */ - if (! ta_ok (ta)) - return TD_BADTA; - - pthread_keys_max = ta->pthread_keys_max; - keys = (struct pthread_key_struct *) alloca (sizeof (keys[0]) - * pthread_keys_max); - - /* Read all the information about the keys. */ - if (ps_pdread (ta->ph, ta->keys, keys, - sizeof (keys[0]) * pthread_keys_max) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* Now get all descriptors, one after the other. */ - for (cnt = 0; cnt < pthread_keys_max; ++cnt) - if (keys[cnt].in_use - /* Return with an error if the callback returns a nonzero value. */ - && callback (cnt, keys[cnt].destr, cbdata_p) != 0) - return TD_DBERR; - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_clear_event.c b/newlib/libc/sys/linux/linuxthreads/td_thr_clear_event.c deleted file mode 100644 index e40e4c36c..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_clear_event.c +++ /dev/null @@ -1,57 +0,0 @@ -/* Disable specific event for thread. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <stddef.h> - -#include "thread_dbP.h" - - -td_err_e -td_thr_clear_event (th, event) - const td_thrhandle_t *th; - td_thr_events_t *event; -{ - td_thr_events_t old_event; - int i; - - LOG ("td_thr_clear_event"); - - /* Write the new value into the thread data structure. */ - if (ps_pdread (th->th_ta_p->ph, - ((char *) th->th_unique - + offsetof (struct _pthread_descr_struct, - p_eventbuf.eventmask)), - &old_event, sizeof (td_thrhandle_t)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* Remove the set bits in. */ - for (i = 0; i < TD_EVENTSIZE; ++i) - old_event.event_bits[i] &= ~event->event_bits[i]; - - /* Write the new value into the thread data structure. */ - if (ps_pdwrite (th->th_ta_p->ph, - ((char *) th->th_unique - + offsetof (struct _pthread_descr_struct, - p_eventbuf.eventmask)), - &old_event, sizeof (td_thrhandle_t)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_dbresume.c b/newlib/libc/sys/linux/linuxthreads/td_thr_dbresume.c deleted file mode 100644 index dbe10bc1c..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_dbresume.c +++ /dev/null @@ -1,30 +0,0 @@ -/* Resume execution of given thread. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_dbresume (const td_thrhandle_t *th) -{ - /* XXX We have to figure out what has to be done. */ - LOG ("td_thr_dbresume"); - return TD_NOCAPAB; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_dbsuspend.c b/newlib/libc/sys/linux/linuxthreads/td_thr_dbsuspend.c deleted file mode 100644 index f96be3628..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_dbsuspend.c +++ /dev/null @@ -1,30 +0,0 @@ -/* Suspend execution of given thread. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_dbsuspend (const td_thrhandle_t *th) -{ - /* XXX We have to figure out what has to be done. */ - LOG ("td_thr_dbsuspend"); - return TD_NOCAPAB; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_event_enable.c b/newlib/libc/sys/linux/linuxthreads/td_thr_event_enable.c deleted file mode 100644 index 3eecd21e2..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_event_enable.c +++ /dev/null @@ -1,41 +0,0 @@ -/* Enable event process-wide. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <stddef.h> - -#include "thread_dbP.h" - - -td_err_e -td_thr_event_enable (th, onoff) - const td_thrhandle_t *th; - int onoff; -{ - LOG ("td_thr_event_enable"); - - /* Write the new value into the thread data structure. */ - if (ps_pdwrite (th->th_ta_p->ph, - ((char *) th->th_unique - + offsetof (struct _pthread_descr_struct, p_report_events)), - &onoff, sizeof (int)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_event_getmsg.c b/newlib/libc/sys/linux/linuxthreads/td_thr_event_getmsg.c deleted file mode 100644 index 582e89e5f..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_event_getmsg.c +++ /dev/null @@ -1,60 +0,0 @@ -/* Retrieve event. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <stddef.h> -#include <string.h> - -#include "thread_dbP.h" - - -td_err_e -td_thr_event_getmsg (const td_thrhandle_t *th, td_event_msg_t *msg) -{ - td_eventbuf_t event; - - LOG ("td_thr_event_getmsg"); - - /* Read the even structure from the target. */ - if (ps_pdread (th->th_ta_p->ph, - ((char *) th->th_unique - + offsetof (struct _pthread_descr_struct, p_eventbuf)), - &event, sizeof (td_eventbuf_t)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* Check whether an event occurred. */ - if (event.eventnum == TD_EVENT_NONE) - /* Nothing. */ - return TD_NOMSG; - - /* Fill the user's data structure. */ - msg->event = event.eventnum; - msg->th_p = th; - msg->msg.data = (uintptr_t) event.eventdata; - - /* And clear the event message in the target. */ - memset (&event, '\0', sizeof (td_eventbuf_t)); - if (ps_pdwrite (th->th_ta_p->ph, - ((char *) th->th_unique - + offsetof (struct _pthread_descr_struct, p_eventbuf)), - &event, sizeof (td_eventbuf_t)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_get_info.c b/newlib/libc/sys/linux/linuxthreads/td_thr_get_info.c deleted file mode 100644 index b4979583a..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_get_info.c +++ /dev/null @@ -1,76 +0,0 @@ -/* Get thread information. - Copyright (C) 1999, 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <stddef.h> -#include <string.h> - -#include "thread_dbP.h" - - -td_err_e -td_thr_get_info (const td_thrhandle_t *th, td_thrinfo_t *infop) -{ - struct _pthread_descr_struct pds; - - LOG ("td_thr_get_info"); - - /* Get the thread descriptor. */ - if (ps_pdread (th->th_ta_p->ph, th->th_unique, &pds, - th->th_ta_p->sizeof_descr) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* Fill in information. Clear first to provide reproducable - results for the fields we do not fill in. */ - memset (infop, '\0', sizeof (td_thrinfo_t)); - - /* We have to handle the manager thread special since the thread - descriptor in older versions is not fully initialized. */ - if (pds.p_nr == 1) - { - infop->ti_tid = th->th_ta_p->pthread_threads_max * 2 + 1; - infop->ti_type = TD_THR_SYSTEM; - infop->ti_state = TD_THR_ACTIVE; - } - else - { - infop->ti_tid = pds.p_tid; - infop->ti_tls = (char *) pds.p_specific; - infop->ti_pri = pds.p_priority; - infop->ti_type = TD_THR_USER; - - if (! pds.p_terminated) - /* XXX For now there is no way to get more information. */ - infop->ti_state = TD_THR_ACTIVE; - else if (! pds.p_detached) - infop->ti_state = TD_THR_ZOMBIE; - else - infop->ti_state = TD_THR_UNKNOWN; - } - - /* Initialization which are the same in both cases. */ - infop->ti_lid = pds.p_pid ?: ps_getpid (th->th_ta_p->ph); - infop->ti_ta_p = th->th_ta_p; - infop->ti_startfunc = pds.p_start_args.start_routine; - memcpy (&infop->ti_events, &pds.p_eventbuf.eventmask, - sizeof (td_thr_events_t)); - infop->ti_traceme = pds.p_report_events != 0; - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_getfpregs.c b/newlib/libc/sys/linux/linuxthreads/td_thr_getfpregs.c deleted file mode 100644 index b453cc0e9..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_getfpregs.c +++ /dev/null @@ -1,49 +0,0 @@ -/* Get a thread's floating-point register set. - Copyright (C) 1999, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_getfpregs (const td_thrhandle_t *th, prfpregset_t *regset) -{ - struct _pthread_descr_struct pds; - - LOG ("td_thr_getfpregs"); - - /* We have to get the state and the PID for this thread. */ - if (ps_pdread (th->th_ta_p->ph, th->th_unique, &pds, - sizeof (struct _pthread_descr_struct)) != PS_OK) - return TD_ERR; - - /* If the thread already terminated we return all zeroes. */ - if (pds.p_terminated) - memset (regset, '\0', sizeof (*regset)); - /* Otherwise get the register content through the callback. */ - else - { - pid_t pid = pds.p_pid ?: ps_getpid (th->th_ta_p->ph); - - if (ps_lgetfpregs (th->th_ta_p->ph, pid, regset) != PS_OK) - return TD_ERR; - } - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_getgregs.c b/newlib/libc/sys/linux/linuxthreads/td_thr_getgregs.c deleted file mode 100644 index 462a1a192..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_getgregs.c +++ /dev/null @@ -1,49 +0,0 @@ -/* Get a thread's general register set. - Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_getgregs (const td_thrhandle_t *th, prgregset_t gregs) -{ - struct _pthread_descr_struct pds; - - LOG ("td_thr_getgregs"); - - /* We have to get the state and the PID for this thread. */ - if (ps_pdread (th->th_ta_p->ph, th->th_unique, &pds, - sizeof (struct _pthread_descr_struct)) != PS_OK) - return TD_ERR; - - /* If the thread already terminated we return all zeroes. */ - if (pds.p_terminated) - memset (gregs, '\0', sizeof (prgregset_t)); - /* Otherwise get the register content through the callback. */ - else - { - pid_t pid = pds.p_pid ?: ps_getpid (th->th_ta_p->ph); - - if (ps_lgetregs (th->th_ta_p->ph, pid, gregs) != PS_OK) - return TD_ERR; - } - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_getxregs.c b/newlib/libc/sys/linux/linuxthreads/td_thr_getxregs.c deleted file mode 100644 index a5194568c..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_getxregs.c +++ /dev/null @@ -1,30 +0,0 @@ -/* Get a thread's extra state register set. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_getxregs (const td_thrhandle_t *th, void *xregs) -{ - /* XXX This might be platform specific. */ - LOG ("td_thr_getxregs"); - return TD_NOXREGS; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_getxregsize.c b/newlib/libc/sys/linux/linuxthreads/td_thr_getxregsize.c deleted file mode 100644 index ddf8cbbe6..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_getxregsize.c +++ /dev/null @@ -1,30 +0,0 @@ -/* Get the size of the extra state register set for this architecture. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_getxregsize (const td_thrhandle_t *th, int *sizep) -{ - /* XXX This might be platform specific. */ - LOG ("td_thr_getxregsize"); - return TD_NOXREGS; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_set_event.c b/newlib/libc/sys/linux/linuxthreads/td_thr_set_event.c deleted file mode 100644 index 6171155b6..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_set_event.c +++ /dev/null @@ -1,57 +0,0 @@ -/* Enable specific event for thread. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <stddef.h> - -#include "thread_dbP.h" - - -td_err_e -td_thr_set_event (th, event) - const td_thrhandle_t *th; - td_thr_events_t *event; -{ - td_thr_events_t old_event; - int i; - - LOG ("td_thr_set_event"); - - /* Write the new value into the thread data structure. */ - if (ps_pdread (th->th_ta_p->ph, - ((char *) th->th_unique - + offsetof (struct _pthread_descr_struct, - p_eventbuf.eventmask)), - &old_event, sizeof (td_thrhandle_t)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* Or the new bits in. */ - for (i = 0; i < TD_EVENTSIZE; ++i) - old_event.event_bits[i] |= event->event_bits[i]; - - /* Write the new value into the thread data structure. */ - if (ps_pdwrite (th->th_ta_p->ph, - ((char *) th->th_unique - + offsetof (struct _pthread_descr_struct, - p_eventbuf.eventmask)), - &old_event, sizeof (td_thrhandle_t)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_setfpregs.c b/newlib/libc/sys/linux/linuxthreads/td_thr_setfpregs.c deleted file mode 100644 index 0d4fce540..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_setfpregs.c +++ /dev/null @@ -1,46 +0,0 @@ -/* Set a thread's floating-point register set. - Copyright (C) 1999, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_setfpregs (const td_thrhandle_t *th, const prfpregset_t *fpregs) -{ - struct _pthread_descr_struct pds; - - LOG ("td_thr_setfpregs"); - - /* We have to get the state and the PID for this thread. */ - if (ps_pdread (th->th_ta_p->ph, th->th_unique, &pds, - sizeof (struct _pthread_descr_struct)) != PS_OK) - return TD_ERR; - - /* Only set the registers if the thread hasn't yet terminated. */ - if (pds.p_terminated == 0) - { - pid_t pid = pds.p_pid ?: ps_getpid (th->th_ta_p->ph); - - if (ps_lsetfpregs (th->th_ta_p->ph, pid, fpregs) != PS_OK) - return TD_ERR; - } - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_setgregs.c b/newlib/libc/sys/linux/linuxthreads/td_thr_setgregs.c deleted file mode 100644 index 3cf653956..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_setgregs.c +++ /dev/null @@ -1,46 +0,0 @@ -/* Set a thread's general register set. - Copyright (C) 1999, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_setgregs (const td_thrhandle_t *th, prgregset_t gregs) -{ - struct _pthread_descr_struct pds; - - LOG ("td_thr_setgregs"); - - /* We have to get the state and the PID for this thread. */ - if (ps_pdread (th->th_ta_p->ph, th->th_unique, &pds, - sizeof (struct _pthread_descr_struct)) != PS_OK) - return TD_ERR; - - /* Only set the registers if the thread hasn't yet terminated. */ - if (pds.p_terminated == 0) - { - pid_t pid = pds.p_pid ?: ps_getpid (th->th_ta_p->ph); - - if (ps_lsetregs (th->th_ta_p->ph, pid, gregs) != PS_OK) - return TD_ERR; - } - - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_setprio.c b/newlib/libc/sys/linux/linuxthreads/td_thr_setprio.c deleted file mode 100644 index 01eab4811..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_setprio.c +++ /dev/null @@ -1,30 +0,0 @@ -/* Set a thread's priority. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_setprio (const td_thrhandle_t *th, int prio) -{ - /* XXX We have to figure out what has to be done. */ - LOG ("td_thr_setprio"); - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_setsigpending.c b/newlib/libc/sys/linux/linuxthreads/td_thr_setsigpending.c deleted file mode 100644 index 6ecd74787..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_setsigpending.c +++ /dev/null @@ -1,31 +0,0 @@ -/* Raise a signal for a thread. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_setsigpending (const td_thrhandle_t *th, unsigned char n, - const sigset_t *ss) -{ - /* XXX We have to figure out what has to be done. */ - LOG ("td_thr_setsigpending"); - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_setxregs.c b/newlib/libc/sys/linux/linuxthreads/td_thr_setxregs.c deleted file mode 100644 index 15ea14a66..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_setxregs.c +++ /dev/null @@ -1,30 +0,0 @@ -/* Set a thread's extra state register set. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_setxregs (const td_thrhandle_t *ta, const void *addr) -{ - /* XXX This might have to be platform specific. */ - LOG ("td_thr_setxregs"); - return TD_NOXREGS; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_sigsetmask.c b/newlib/libc/sys/linux/linuxthreads/td_thr_sigsetmask.c deleted file mode 100644 index 79f144328..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_sigsetmask.c +++ /dev/null @@ -1,30 +0,0 @@ -/* Set a thread's signal mask. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_sigsetmask (const td_thrhandle_t *th, const sigset_t *ss) -{ - /* XXX We have to figure out what has to be done. */ - LOG ("td_thr_sigsetmask"); - return TD_OK; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_tsd.c b/newlib/libc/sys/linux/linuxthreads/td_thr_tsd.c deleted file mode 100644 index 192b42571..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_tsd.c +++ /dev/null @@ -1,76 +0,0 @@ -/* Get a thread-specific data pointer for a thread. - Copyright (C) 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_tsd (const td_thrhandle_t *th, const thread_key_t tk, void **data) -{ - struct _pthread_descr_struct pds; - struct pthread_key_struct *keys = th->th_ta_p->keys; - struct pthread_key_struct key; - int pthread_keys_max = th->th_ta_p->pthread_keys_max; - int pthread_key_2ndlevel_size = th->th_ta_p->pthread_key_2ndlevel_size; - unsigned int idx1st; - unsigned int idx2nd; - void *p; - - LOG ("td_thr_tsd"); - - /* Get the thread descriptor. */ - if (ps_pdread (th->th_ta_p->ph, th->th_unique, &pds, - sizeof (struct _pthread_descr_struct)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* Check correct value of key. */ - if (tk >= pthread_keys_max) - return TD_BADKEY; - - /* Get the key entry. */ - if (ps_pdread (th->th_ta_p->ph, keys, &key, - sizeof (struct pthread_key_struct)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* Fail if this key is not at all used. */ - if (! key.in_use) - return TD_BADKEY; - - /* Compute the indeces. */ - idx1st = tk / pthread_key_2ndlevel_size; - idx2nd = tk % pthread_key_2ndlevel_size; - - /* Check the pointer to the second level array. */ - if (pds.p_specific[idx1st] == NULL) - return TD_NOTSD; - - /* Now get the real key. - XXX I don't know whether it's correct but there is currently no - easy way to determine whether a key was never set or the value - is NULL. We return an error whenever the value is NULL. */ - if (ps_pdread (th->th_ta_p->ph, &pds.p_specific[idx1st][idx2nd], &p, - sizeof (void *)) != PS_OK) - return TD_ERR; - - if (p != NULL) - *data = p; - - return p != NULL ? TD_OK : TD_NOTSD; -} diff --git a/newlib/libc/sys/linux/linuxthreads/td_thr_validate.c b/newlib/libc/sys/linux/linuxthreads/td_thr_validate.c deleted file mode 100644 index 8821f0e84..000000000 --- a/newlib/libc/sys/linux/linuxthreads/td_thr_validate.c +++ /dev/null @@ -1,57 +0,0 @@ -/* Validate a thread handle. - Copyright (C) 1999, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1999. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include "thread_dbP.h" - - -td_err_e -td_thr_validate (const td_thrhandle_t *th) -{ - struct pthread_handle_struct *handles = th->th_ta_p->handles; - int pthread_threads_max = th->th_ta_p->pthread_threads_max; - int cnt; - - LOG ("td_thr_validate"); - - /* Now get all descriptors, one after the other. */ - for (cnt = 0; cnt < pthread_threads_max; ++cnt, ++handles) - { - struct pthread_handle_struct phc; - - if (ps_pdread (th->th_ta_p->ph, handles, &phc, - sizeof (struct pthread_handle_struct)) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - if (phc.h_descr != NULL && phc.h_descr == th->th_unique) - { - struct _pthread_descr_struct pds; - - if (ps_pdread (th->th_ta_p->ph, phc.h_descr, &pds, - th->th_ta_p->sizeof_descr) != PS_OK) - return TD_ERR; /* XXX Other error value? */ - - /* XXX There should be another test using the TID but this is - currently not available. */ - return pds.p_terminated != 0 ? TD_NOTHR : TD_OK; - } - } - - return TD_ERR; -} diff --git a/newlib/libc/sys/linux/linuxthreads/testrtsig.h b/newlib/libc/sys/linux/linuxthreads/testrtsig.h deleted file mode 100644 index cf36ab08a..000000000 --- a/newlib/libc/sys/linux/linuxthreads/testrtsig.h +++ /dev/null @@ -1,36 +0,0 @@ -/* Test whether RT signals are really available. - Copyright (C) 1997, 1999 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#include <string.h> -#include <sys/utsname.h> - -#include "kernel-features.h" - -static int -kernel_has_rtsig (void) -{ -#if __ASSUME_REALTIME_SIGNALS - return 1; -#else - struct utsname name; - - return uname (&name) == 0 && __strverscmp (name.release, "2.1.70") >= 0; -#endif -} diff --git a/newlib/libc/sys/linux/linuxthreads/thread_db.h b/newlib/libc/sys/linux/linuxthreads/thread_db.h deleted file mode 100644 index b192d1f2e..000000000 --- a/newlib/libc/sys/linux/linuxthreads/thread_db.h +++ /dev/null @@ -1,439 +0,0 @@ -/* Copyright (C) 1999, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -#ifndef _THREAD_DB_H -#define _THREAD_DB_H 1 - -/* This is the debugger interface for the LinuxThreads library. It is - modelled closely after the interface with same names in Solaris with - the goal to share the same code in the debugger. */ -#include <pthread.h> -#include <stdint.h> -#include <sys/types.h> -#include <sys/procfs.h> - - -/* Error codes of the library. */ -typedef enum -{ - TD_OK, /* No error. */ - TD_ERR, /* No further specified error. */ - TD_NOTHR, /* No matching thread found. */ - TD_NOSV, /* No matching synchronization handle found. */ - TD_NOLWP, /* No matching light-weighted process found. */ - TD_BADPH, /* Invalid process handle. */ - TD_BADTH, /* Invalid thread handle. */ - TD_BADSH, /* Invalid synchronization handle. */ - TD_BADTA, /* Invalid thread agent. */ - TD_BADKEY, /* Invalid key. */ - TD_NOMSG, /* No event available. */ - TD_NOFPREGS, /* No floating-point register content available. */ - TD_NOLIBTHREAD, /* Application not linked with thread library. */ - TD_NOEVENT, /* Requested event is not supported. */ - TD_NOCAPAB, /* Capability not available. */ - TD_DBERR, /* Internal debug library error. */ - TD_NOAPLIC, /* Operation is not applicable. */ - TD_NOTSD, /* No thread-specific data available. */ - TD_MALLOC, /* Out of memory. */ - TD_PARTIALREG, /* Not entire register set was read or written. */ - TD_NOXREGS /* X register set not available for given thread. */ -} td_err_e; - - -/* Possible thread states. TD_THR_ANY_STATE is a pseudo-state used to - select threads regardless of state in td_ta_thr_iter(). */ -typedef enum -{ - TD_THR_ANY_STATE, - TD_THR_UNKNOWN, - TD_THR_STOPPED, - TD_THR_RUN, - TD_THR_ACTIVE, - TD_THR_ZOMBIE, - TD_THR_SLEEP, - TD_THR_STOPPED_ASLEEP -} td_thr_state_e; - -/* Thread type: user or system. TD_THR_ANY_TYPE is a pseudo-type used - to select threads regardless of type in td_ta_thr_iter(). */ -typedef enum -{ - TD_THR_ANY_TYPE, - TD_THR_USER, - TD_THR_SYSTEM -} td_thr_type_e; - - -/* Types of the debugging library. */ - -/* Handle for a process. This type is opaque. */ -typedef struct td_thragent td_thragent_t; - -/* The actual thread handle type. This is also opaque. */ -typedef struct td_thrhandle -{ - td_thragent_t *th_ta_p; - psaddr_t th_unique; -} td_thrhandle_t; - - -/* Flags for `td_ta_thr_iter'. */ -#define TD_THR_ANY_USER_FLAGS 0xffffffff -#define TD_THR_LOWEST_PRIORITY -20 -#define TD_SIGNO_MASK NULL - - -#define TD_EVENTSIZE 2 -#define BT_UISHIFT 5 /* log base 2 of BT_NBIPUI, to extract word index */ -#define BT_NBIPUI (1 << BT_UISHIFT) /* n bits per uint */ -#define BT_UIMASK (BT_NBIPUI - 1) /* to extract bit index */ - -/* Bitmask of enabled events. */ -typedef struct td_thr_events -{ - uint32_t event_bits[TD_EVENTSIZE]; -} td_thr_events_t; - -/* Event set manipulation macros. */ -#define __td_eventmask(n) \ - (UINT32_C (1) << (((n) - 1) & BT_UIMASK)) -#define __td_eventword(n) \ - ((UINT32_C ((n) - 1)) >> BT_UISHIFT) - -#define td_event_emptyset(setp) \ - do { \ - int __i; \ - for (__i = TD_EVENTSIZE; __i > 0; --__i) \ - (setp)->event_bits[__i - 1] = 0; \ - } while (0) - -#define td_event_fillset(setp) \ - do { \ - int __i; \ - for (__i = TD_EVENTSIZE; __i > 0; --__i) \ - (setp)->event_bits[__i - 1] = UINT32_C (0xffffffff); \ - } while (0) - -#define td_event_addset(setp, n) \ - (((setp)->event_bits[__td_eventword (n)]) |= __td_eventmask (n)) -#define td_event_delset(setp, n) \ - (((setp)->event_bits[__td_eventword (n)]) &= ~__td_eventmask (n)) -#define td_eventismember(setp, n) \ - (__td_eventmask (n) & ((setp)->event_bits[__td_eventword (n)])) -#if TD_EVENTSIZE == 2 -# define td_eventisempty(setp) \ - (!((setp)->event_bits[0]) && !((setp)->event_bits[1])) -#else -# error "td_eventisempty must be changed to match TD_EVENTSIZE" -#endif - -/* Events reportable by the thread implementation. */ -typedef enum -{ - TD_ALL_EVENTS, /* Pseudo-event number. */ - TD_EVENT_NONE = TD_ALL_EVENTS, /* Depends on context. */ - TD_READY, /* Is executable now. */ - TD_SLEEP, /* Blocked in a synchronization obj. */ - TD_SWITCHTO, /* Now assigned to a process. */ - TD_SWITCHFROM, /* Not anymore assigned to a process. */ - TD_LOCK_TRY, /* Trying to get an unavailable lock. */ - TD_CATCHSIG, /* Signal posted to the thread. */ - TD_IDLE, /* Process getting idle. */ - TD_CREATE, /* New thread created. */ - TD_DEATH, /* Thread terminated. */ - TD_PREEMPT, /* Preempted. */ - TD_PRI_INHERIT, /* Inherited elevated priority. */ - TD_REAP, /* Reaped. */ - TD_CONCURRENCY, /* Number of processes changing. */ - TD_TIMEOUT, /* Conditional variable wait timed out. */ - TD_MIN_EVENT_NUM = TD_READY, - TD_MAX_EVENT_NUM = TD_TIMEOUT, - TD_EVENTS_ENABLE = 31 /* Event reporting enabled. */ -} td_event_e; - -/* Values representing the different ways events are reported. */ -typedef enum -{ - NOTIFY_BPT, /* User must insert breakpoint at u.bptaddr. */ - NOTIFY_AUTOBPT, /* Breakpoint at u.bptaddr is automatically - inserted. */ - NOTIFY_SYSCALL /* System call u.syscallno will be invoked. */ -} td_notify_e; - -/* Description how event type is reported. */ -typedef struct td_notify -{ - td_notify_e type; /* Way the event is reported. */ - union - { - psaddr_t bptaddr; /* Address of breakpoint. */ - int syscallno; /* Number of system call used. */ - } u; -} td_notify_t; - -/* Structure used to report event. */ -typedef struct td_event_msg -{ - td_event_e event; /* Event type being reported. */ - const td_thrhandle_t *th_p; /* Thread reporting the event. */ - union - { -# if 0 - td_synchandle_t *sh; /* Handle of synchronization object. */ -#endif - uintptr_t data; /* Event specific data. */ - } msg; -} td_event_msg_t; - -/* Structure containing event data available in each thread structure. */ -typedef struct -{ - td_thr_events_t eventmask; /* Mask of enabled events. */ - td_event_e eventnum; /* Number of last event. */ - void *eventdata; /* Data associated with event. */ -} td_eventbuf_t; - - -/* Gathered statistics about the process. */ -typedef struct td_ta_stats -{ - int nthreads; /* Total number of threads in use. */ - int r_concurrency; /* Concurrency level requested by user. */ - int nrunnable_num; /* Average runnable threads, numerator. */ - int nrunnable_den; /* Average runnable threads, denominator. */ - int a_concurrency_num; /* Achieved concurrency level, numerator. */ - int a_concurrency_den; /* Achieved concurrency level, denominator. */ - int nlwps_num; /* Average number of processes in use, - numerator. */ - int nlwps_den; /* Average number of processes in use, - denominator. */ - int nidle_num; /* Average number of idling processes, - numerator. */ - int nidle_den; /* Average number of idling processes, - denominator. */ -} td_ta_stats_t; - - -/* Since Sun's library is based on Solaris threads we have to define a few - types to map them to POSIX threads. */ -typedef pthread_t thread_t; -typedef pthread_key_t thread_key_t; - - -/* Callback for iteration over threads. */ -typedef int td_thr_iter_f (const td_thrhandle_t *, void *); - -/* Callback for iteration over thread local data. */ -typedef int td_key_iter_f (thread_key_t, void (*) (void *), void *); - - - -/* Forward declaration. This has to be defined by the user. */ -struct ps_prochandle; - - -/* Information about the thread. */ -typedef struct td_thrinfo -{ - td_thragent_t *ti_ta_p; /* Process handle. */ - unsigned int ti_user_flags; /* Unused. */ - thread_t ti_tid; /* Thread ID returned by - pthread_create(). */ - char *ti_tls; /* Pointer to thread-local data. */ - psaddr_t ti_startfunc; /* Start function passed to - pthread_create(). */ - psaddr_t ti_stkbase; /* Base of thread's stack. */ - long int ti_stksize; /* Size of thread's stack. */ - psaddr_t ti_ro_area; /* Unused. */ - int ti_ro_size; /* Unused. */ - td_thr_state_e ti_state; /* Thread state. */ - unsigned char ti_db_suspended; /* Nonzero if suspended by debugger. */ - td_thr_type_e ti_type; /* Type of the thread (system vs - user thread). */ - intptr_t ti_pc; /* Unused. */ - intptr_t ti_sp; /* Unused. */ - short int ti_flags; /* Unused. */ - int ti_pri; /* Thread priority. */ - lwpid_t ti_lid; /* Unused. */ - sigset_t ti_sigmask; /* Signal mask. */ - unsigned char ti_traceme; /* Nonzero if event reporting - enabled. */ - unsigned char ti_preemptflag; /* Unused. */ - unsigned char ti_pirecflag; /* Unused. */ - sigset_t ti_pending; /* Set of pending signals. */ - td_thr_events_t ti_events; /* Set of enabled events. */ -} td_thrinfo_t; - - - -/* Prototypes for exported library functions. */ - -/* Initialize the thread debug support library. */ -extern td_err_e td_init (void); - -/* Historical relict. Should not be used anymore. */ -extern td_err_e td_log (void); - -/* Return list of symbols the library can request. */ -extern const char **td_symbol_list (void); - -/* Generate new thread debug library handle for process PS. */ -extern td_err_e td_ta_new (struct ps_prochandle *__ps, td_thragent_t **__ta); - -/* Free resources allocated for TA. */ -extern td_err_e td_ta_delete (td_thragent_t *__ta); - -/* Get number of currently running threads in process associated with TA. */ -extern td_err_e td_ta_get_nthreads (const td_thragent_t *__ta, int *__np); - -/* Return process handle passed in `td_ta_new' for process associated with - TA. */ -extern td_err_e td_ta_get_ph (const td_thragent_t *__ta, - struct ps_prochandle **__ph); - -/* Map thread library handle PT to thread debug library handle for process - associated with TA and store result in *TH. */ -extern td_err_e td_ta_map_id2thr (const td_thragent_t *__ta, pthread_t __pt, - td_thrhandle_t *__th); - -/* Map process ID LWPID to thread debug library handle for process - associated with TA and store result in *TH. */ -extern td_err_e td_ta_map_lwp2thr (const td_thragent_t *__ta, lwpid_t __lwpid, - td_thrhandle_t *__th); - - -/* Call for each thread in a process associated with TA the callback function - CALLBACK. */ -extern td_err_e td_ta_thr_iter (const td_thragent_t *__ta, - td_thr_iter_f *__callback, void *__cbdata_p, - td_thr_state_e __state, int __ti_pri, - sigset_t *__ti_sigmask_p, - unsigned int __ti_user_flags); - -/* Call for each defined thread local data entry the callback function KI. */ -extern td_err_e td_ta_tsd_iter (const td_thragent_t *__ta, td_key_iter_f *__ki, - void *__p); - - -/* Get event address for EVENT. */ -extern td_err_e td_ta_event_addr (const td_thragent_t *__ta, - td_event_e __event, td_notify_t *__ptr); - -/* Enable EVENT in global mask. */ -extern td_err_e td_ta_set_event (const td_thragent_t *__ta, - td_thr_events_t *__event); - -/* Disable EVENT in global mask. */ -extern td_err_e td_ta_clear_event (const td_thragent_t *__ta, - td_thr_events_t *__event); - -/* Return information about last event. */ -extern td_err_e td_ta_event_getmsg (const td_thragent_t *__ta, - td_event_msg_t *msg); - - -/* Set suggested concurrency level for process associated with TA. */ -extern td_err_e td_ta_setconcurrency (const td_thragent_t *__ta, int __level); - - -/* Enable collecting statistics for process associated with TA. */ -extern td_err_e td_ta_enable_stats (const td_thragent_t *__ta, int __enable); - -/* Reset statistics. */ -extern td_err_e td_ta_reset_stats (const td_thragent_t *__ta); - -/* Retrieve statistics from process associated with TA. */ -extern td_err_e td_ta_get_stats (const td_thragent_t *__ta, - td_ta_stats_t *__statsp); - - -/* Validate that TH is a thread handle. */ -extern td_err_e td_thr_validate (const td_thrhandle_t *__th); - -/* Return information about thread TH. */ -extern td_err_e td_thr_get_info (const td_thrhandle_t *__th, - td_thrinfo_t *__infop); - -/* Retrieve floating-point register contents of process running thread TH. */ -extern td_err_e td_thr_getfpregs (const td_thrhandle_t *__th, - prfpregset_t *__regset); - -/* Retrieve general register contents of process running thread TH. */ -extern td_err_e td_thr_getgregs (const td_thrhandle_t *__th, - prgregset_t __gregs); - -/* Retrieve extended register contents of process running thread TH. */ -extern td_err_e td_thr_getxregs (const td_thrhandle_t *__th, void *__xregs); - -/* Get size of extended register set of process running thread TH. */ -extern td_err_e td_thr_getxregsize (const td_thrhandle_t *__th, int *__sizep); - -/* Set floating-point register contents of process running thread TH. */ -extern td_err_e td_thr_setfpregs (const td_thrhandle_t *__th, - const prfpregset_t *__fpregs); - -/* Set general register contents of process running thread TH. */ -extern td_err_e td_thr_setgregs (const td_thrhandle_t *__th, - prgregset_t __gregs); - -/* Set extended register contents of process running thread TH. */ -extern td_err_e td_thr_setxregs (const td_thrhandle_t *__th, - const void *__addr); - - -/* Enable reporting for EVENT for thread TH. */ -extern td_err_e td_thr_event_enable (const td_thrhandle_t *__th, int __event); - -/* Enable EVENT for thread TH. */ -extern td_err_e td_thr_set_event (const td_thrhandle_t *__th, - td_thr_events_t *__event); - -/* Disable EVENT for thread TH. */ -extern td_err_e td_thr_clear_event (const td_thrhandle_t *__th, - td_thr_events_t *__event); - -/* Get event message for thread TH. */ -extern td_err_e td_thr_event_getmsg (const td_thrhandle_t *__th, - td_event_msg_t *__msg); - - -/* Set priority of thread TH. */ -extern td_err_e td_thr_setprio (const td_thrhandle_t *__th, int __prio); - - -/* Set pending signals for thread TH. */ -extern td_err_e td_thr_setsigpending (const td_thrhandle_t *__th, - unsigned char __n, const sigset_t *__ss); - -/* Set signal mask for thread TH. */ -extern td_err_e td_thr_sigsetmask (const td_thrhandle_t *__th, - const sigset_t *__ss); - - -/* Return thread local data associated with key TK in thread TH. */ -extern td_err_e td_thr_tsd (const td_thrhandle_t *__th, - const thread_key_t __tk, void **__data); - - -/* Suspend execution of thread TH. */ -extern td_err_e td_thr_dbsuspend (const td_thrhandle_t *__th); - -/* Resume execution of thread TH. */ -extern td_err_e td_thr_dbresume (const td_thrhandle_t *__th); - -#endif /* thread_db.h */ diff --git a/newlib/libc/sys/linux/linuxthreads/thread_dbP.h b/newlib/libc/sys/linux/linuxthreads/thread_dbP.h deleted file mode 100644 index c695fa253..000000000 --- a/newlib/libc/sys/linux/linuxthreads/thread_dbP.h +++ /dev/null @@ -1,105 +0,0 @@ -/* Private header for thread debug library. */ -#ifndef _THREAD_DBP_H -#define _THREAD_DBP_H 1 - -#include <string.h> -#include "proc_service.h" -#include "thread_db.h" -#include "internals.h" - - -/* Indeces for the symbol names. */ -enum - { - PTHREAD_THREADS_EVENTS = 0, - PTHREAD_LAST_EVENT, - PTHREAD_HANDLES_NUM, - PTHREAD_HANDLES, - PTHREAD_KEYS, - LINUXTHREADS_PTHREAD_THREADS_MAX, - LINUXTHREADS_PTHREAD_KEYS_MAX, - LINUXTHREADS_PTHREAD_SIZEOF_DESCR, - LINUXTHREADS_CREATE_EVENT, - LINUXTHREADS_DEATH_EVENT, - LINUXTHREADS_REAP_EVENT, - NUM_MESSAGES - }; - - -/* Comment out the following for less verbose output. */ -#ifndef NDEBUG -# define LOG(c) if (__td_debug) __libc_write (2, c "\n", strlen (c "\n")) -extern int __td_debug; -#else -# define LOG(c) -#endif - - -/* Handle for a process. This type is opaque. */ -struct td_thragent -{ - /* Delivered by the debugger and we have to pass it back in the - proc callbacks. */ - struct ps_prochandle *ph; - - /* Some cached information. */ - - /* Address of the `__pthread_handles' array. */ - struct pthread_handle_struct *handles; - - /* Address of the `pthread_kyes' array. */ - struct pthread_key_struct *keys; - - /* Maximum number of threads. */ - int pthread_threads_max; - - /* Maximum number of thread-local data keys. */ - int pthread_keys_max; - - /* Size of 2nd level array for thread-local data keys. */ - int pthread_key_2ndlevel_size; - - /* Sizeof struct _pthread_descr_struct. */ - int sizeof_descr; - - /* Pointer to the `__pthread_threads_events' variable in the target. */ - psaddr_t pthread_threads_eventsp; - - /* Pointer to the `__pthread_last_event' variable in the target. */ - psaddr_t pthread_last_event; - - /* Pointer to the `__pthread_handles_num' variable. */ - psaddr_t pthread_handles_num; -}; - - -/* Type used internally to keep track of thread agent descriptors. */ -struct agent_list -{ - td_thragent_t *ta; - struct agent_list *next; -}; - -/* List of all known descriptors. */ -extern struct agent_list *__td_agent_list; - -/* Function used to test for correct thread agent pointer. */ -static inline int -ta_ok (const td_thragent_t *ta) -{ - struct agent_list *runp = __td_agent_list; - - if (ta == NULL) - return 0; - - while (runp != NULL && runp->ta != ta) - runp = runp->next; - - return runp != NULL; -} - - -/* Internal wrapper around ps_pglobal_lookup. */ -extern int td_lookup (struct ps_prochandle *ps, int idx, psaddr_t *sym_addr); - -#endif /* thread_dbP.h */ diff --git a/newlib/libc/sys/linux/linuxthreads/timer_create.c b/newlib/libc/sys/linux/linuxthreads/timer_create.c deleted file mode 100644 index 1dccd3036..000000000 --- a/newlib/libc/sys/linux/linuxthreads/timer_create.c +++ /dev/null @@ -1,179 +0,0 @@ -/* Copyright (C) 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Kaz Kylheku <kaz@ashi.footprints.net>. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <errno.h> -#include <signal.h> -#include <pthread.h> -#include <time.h> -#include <unistd.h> - -#include "posix-timer.h" - - -/* Create new per-process timer using CLOCK. */ -int -timer_create (clock_id, evp, timerid) - clockid_t clock_id; - struct sigevent *evp; - timer_t *timerid; -{ - int retval = -1; - struct timer_node *newtimer = NULL; - struct thread_node *thread = NULL; - - if (clock_id != CLOCK_REALTIME -#ifdef _POSIX_CPUTIME - && clock_id != CLOCK_PROCESS_CPUTIME_ID -#endif -#ifdef _POSIX_THREAD_CPUTIME - && clock_id != CLOCK_THREAD_CPUTIME_ID -#endif - ) - { - __set_errno (EINVAL); - return -1; - } - - pthread_once (&__timer_init_once_control, __timer_init_once); - - if (__timer_init_failed) - { - __set_errno (ENOMEM); - return -1; - } - - pthread_mutex_lock (&__timer_mutex); - - newtimer = __timer_alloc (); - if (__builtin_expect (newtimer == NULL, 0)) - { - __set_errno (EAGAIN); - goto unlock_bail; - } - - if (evp != NULL) - newtimer->event = *evp; - else - { - newtimer->event.sigev_notify = SIGEV_SIGNAL; - newtimer->event.sigev_signo = SIGALRM; - newtimer->event.sigev_value.sival_int = timer_ptr2id (newtimer); - newtimer->event.sigev_notify_function = 0; - } - - newtimer->event.sigev_notify_attributes = &newtimer->attr; - newtimer->creator_pid = getpid (); - - switch (__builtin_expect (newtimer->event.sigev_notify, SIGEV_SIGNAL)) - { - case SIGEV_NONE: - /* This is a strange choice! */ - break; - - case SIGEV_SIGNAL: - /* We have a global thread for delivering timed signals. - If it is not running, try to start it up. */ - switch (clock_id) - { - case CLOCK_REALTIME: - default: - thread = &__timer_signal_thread_rclk; - break; -#ifdef _POSIX_CPUTIME - case CLOCK_PROCESS_CPUTIME_ID: - thread = &__timer_signal_thread_pclk; - break; -#endif -#ifdef _POSIX_THREAD_CPUTIME - case CLOCK_THREAD_CPUTIME_ID: - thread = &__timer_signal_thread_tclk; - break; -#endif - } - - if (! thread->exists) - { - if (__builtin_expect (__timer_thread_start (thread), - 1) < 0) - { - __set_errno (EAGAIN); - goto unlock_bail; - } - } - break; - - case SIGEV_THREAD: - /* Copy over thread attributes or set up default ones. */ - if (evp->sigev_notify_attributes) - newtimer->attr = *(pthread_attr_t *) evp->sigev_notify_attributes; - else - pthread_attr_init (&newtimer->attr); - - /* Ensure thread attributes call for deatched thread. */ - pthread_attr_setdetachstate (&newtimer->attr, PTHREAD_CREATE_DETACHED); - - /* Try to find existing thread having the right attributes. */ - thread = __timer_thread_find_matching (&newtimer->attr, clock_id); - - /* If no existing thread has these attributes, try to allocate one. */ - if (thread == NULL) - thread = __timer_thread_alloc (&newtimer->attr, clock_id); - - /* Out of luck; no threads are available. */ - if (__builtin_expect (thread == NULL, 0)) - { - __set_errno (EAGAIN); - goto unlock_bail; - } - - /* If the thread is not running already, try to start it. */ - if (! thread->exists - && __builtin_expect (! __timer_thread_start (thread), 0)) - { - __set_errno (EAGAIN); - goto unlock_bail; - } - break; - - default: - __set_errno (EINVAL); - goto unlock_bail; - } - - newtimer->clock = clock_id; - newtimer->abstime = 0; - newtimer->armed = 0; - newtimer->thread = thread; - - *timerid = timer_ptr2id (newtimer); - retval = 0; - - if (__builtin_expect (retval, 0) == -1) - { - unlock_bail: - if (thread != NULL) - __timer_thread_dealloc (thread); - if (newtimer != NULL) - __timer_dealloc (newtimer); - } - - pthread_mutex_unlock (&__timer_mutex); - - return retval; -} diff --git a/newlib/libc/sys/linux/linuxthreads/timer_delete.c b/newlib/libc/sys/linux/linuxthreads/timer_delete.c deleted file mode 100644 index 24f4ffed3..000000000 --- a/newlib/libc/sys/linux/linuxthreads/timer_delete.c +++ /dev/null @@ -1,70 +0,0 @@ -/* Copyright (C) 2000, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Kaz Kylheku <kaz@ashi.footprints.net>. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <assert.h> -#include <errno.h> -#include <pthread.h> -#include <time.h> - -#include "posix-timer.h" - - -/* Delete timer TIMERID. */ -int -timer_delete (timerid) - timer_t timerid; -{ - struct timer_node *timer; - int retval = -1; - - pthread_mutex_lock (&__timer_mutex); - - timer = timer_id2ptr (timerid); - if (! timer_valid (timer)) - /* Invalid timer ID or the timer is not in use. */ - __set_errno (EINVAL); - else - { - if (timer->armed && timer->thread != NULL) - { - struct thread_node *thread = timer->thread; - assert (thread != NULL); - - /* If thread is cancelled while waiting for handler to terminate, - the mutex is unlocked and timer_delete is aborted. */ - pthread_cleanup_push (__timer_mutex_cancel_handler, &__timer_mutex); - - /* If timer is currently being serviced, wait for it to finish. */ - while (thread->current_timer == timer) - pthread_cond_wait (&thread->cond, &__timer_mutex); - - pthread_cleanup_pop (0); - } - - /* Remove timer from whatever queue it may be on and deallocate it. */ - timer->inuse = TIMER_DELETED; - list_unlink_ip (&timer->links); - timer_delref (timer); - retval = 0; - } - - pthread_mutex_unlock (&__timer_mutex); - - return retval; -} diff --git a/newlib/libc/sys/linux/linuxthreads/timer_getoverr.c b/newlib/libc/sys/linux/linuxthreads/timer_getoverr.c deleted file mode 100644 index 204addc85..000000000 --- a/newlib/libc/sys/linux/linuxthreads/timer_getoverr.c +++ /dev/null @@ -1,45 +0,0 @@ -/* Copyright (C) 2000, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Kaz Kylheku <kaz@ashi.footprints.net>. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <errno.h> -#include <pthread.h> -#include <time.h> - -#include "posix-timer.h" - - -/* Get expiration overrun for timer TIMERID. */ -int -timer_getoverrun (timerid) - timer_t timerid; -{ - struct timer_node *timer; - int retval = -1; - - pthread_mutex_lock (&__timer_mutex); - - if (! timer_valid (timer = timer_id2ptr (timerid))) - __set_errno (EINVAL); - else - retval = 0; /* TODO: overrun counting not supported */ - - pthread_mutex_unlock (&__timer_mutex); - - return retval; -} diff --git a/newlib/libc/sys/linux/linuxthreads/timer_gettime.c b/newlib/libc/sys/linux/linuxthreads/timer_gettime.c deleted file mode 100644 index dbee9d915..000000000 --- a/newlib/libc/sys/linux/linuxthreads/timer_gettime.c +++ /dev/null @@ -1,71 +0,0 @@ -/* Copyright (C) 2000 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Kaz Kylheku <kaz@ashi.footprints.net>. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <errno.h> -#include <pthread.h> -#include <time.h> - -#include "posix-timer.h" - - -/* Get current value of timer TIMERID and store it in VLAUE. */ -int -timer_gettime (timerid, value) - timer_t timerid; - struct itimerspec *value; -{ - struct timer_node *timer; - struct timespec now, expiry; - int retval = -1, armed = 0, valid; - clock_t clock = 0; - - pthread_mutex_lock (&__timer_mutex); - - timer = timer_id2ptr (timerid); - valid = timer_valid (timer); - - if (valid) { - armed = timer->armed; - expiry = timer->expirytime; - clock = timer->clock; - value->it_interval = timer->value.it_interval; - } - - pthread_mutex_unlock (&__timer_mutex); - - if (valid) - { - if (armed) - { - clock_gettime (clock, &now); - timespec_sub (&value->it_value, &expiry, &now); - } - else - { - value->it_value.tv_sec = 0; - value->it_value.tv_nsec = 0; - } - - retval = 0; - } - else - __set_errno (EINVAL); - - return retval; -} diff --git a/newlib/libc/sys/linux/linuxthreads/timer_routines.c b/newlib/libc/sys/linux/linuxthreads/timer_routines.c deleted file mode 100644 index 65dc5dca5..000000000 --- a/newlib/libc/sys/linux/linuxthreads/timer_routines.c +++ /dev/null @@ -1,584 +0,0 @@ -/* Helper code for POSIX timer implementation on LinuxThreads. - Copyright (C) 2000, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Kaz Kylheku <kaz@ashi.footprints.net>. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <assert.h> -#include <errno.h> -#include <pthread.h> -#include <stddef.h> -#include <stdlib.h> -#include <string.h> -#include <sysdep.h> -#include <time.h> -#include <unistd.h> -#include <sys/syscall.h> - -#include "posix-timer.h" - - -/* Number of threads used. */ -#define THREAD_MAXNODES 16 - -/* Array containing the descriptors for the used threads. */ -static struct thread_node thread_array[THREAD_MAXNODES]; - -/* Static array with the structures for all the timers. */ -struct timer_node __timer_array[TIMER_MAX]; - -/* Global lock to protect operation on the lists. */ -pthread_mutex_t __timer_mutex = PTHREAD_MUTEX_INITIALIZER; - -/* Variable to protext initialization. */ -pthread_once_t __timer_init_once_control = PTHREAD_ONCE_INIT; - -/* Nonzero if initialization of timer implementation failed. */ -int __timer_init_failed; - -/* Node for the thread used to deliver signals. */ -struct thread_node __timer_signal_thread_rclk; -#ifdef _POSIX_CPUTIME -struct thread_node __timer_signal_thread_pclk; -#endif -#ifdef _POSIX_THREAD_CPUTIME -struct thread_node __timer_signal_thread_tclk; -#endif - -/* Lists to keep free and used timers and threads. */ -struct list_links timer_free_list; -struct list_links thread_free_list; -struct list_links thread_active_list; - - -#ifdef __NR_rt_sigqueueinfo -extern int __syscall_rt_sigqueueinfo (int, int, siginfo_t *); -#endif - - -/* List handling functions. */ -static inline void -list_init (struct list_links *list) -{ - list->next = list->prev = list; -} - -static inline void -list_append (struct list_links *list, struct list_links *newp) -{ - newp->prev = list->prev; - newp->next = list; - list->prev->next = newp; - list->prev = newp; -} - -static inline void -list_insbefore (struct list_links *list, struct list_links *newp) -{ - list_append (list, newp); -} - -/* - * Like list_unlink_ip, except that calling it on a node that - * is already unlinked is disastrous rather than a noop. - */ - -static inline void -list_unlink (struct list_links *list) -{ - struct list_links *lnext = list->next, *lprev = list->prev; - - lnext->prev = lprev; - lprev->next = lnext; -} - -static inline struct list_links * -list_first (struct list_links *list) -{ - return list->next; -} - -static inline struct list_links * -list_null (struct list_links *list) -{ - return list; -} - -static inline struct list_links * -list_next (struct list_links *list) -{ - return list->next; -} - -static inline int -list_isempty (struct list_links *list) -{ - return list->next == list; -} - - -/* Functions build on top of the list functions. */ -static inline struct thread_node * -thread_links2ptr (struct list_links *list) -{ - return (struct thread_node *) ((char *) list - - offsetof (struct thread_node, links)); -} - -static inline struct timer_node * -timer_links2ptr (struct list_links *list) -{ - return (struct timer_node *) ((char *) list - - offsetof (struct timer_node, links)); -} - - -/* Initialize a newly allocated thread structure. */ -static void -thread_init (struct thread_node *thread, const pthread_attr_t *attr, clockid_t clock_id) -{ - if (attr != NULL) - thread->attr = *attr; - else - { - pthread_attr_init (&thread->attr); - pthread_attr_setdetachstate (&thread->attr, PTHREAD_CREATE_DETACHED); - } - - thread->exists = 0; - list_init (&thread->timer_queue); - pthread_cond_init (&thread->cond, 0); - thread->current_timer = 0; - thread->captured = pthread_self (); - thread->clock_id = clock_id; -} - - -/* Initialize the global lists, and acquire global resources. Error - reporting is done by storing a non-zero value to the global variable - timer_init_failed. */ -static void -init_module (void) -{ - int i; - - list_init (&timer_free_list); - list_init (&thread_free_list); - list_init (&thread_active_list); - - for (i = 0; i < TIMER_MAX; ++i) - { - list_append (&timer_free_list, &__timer_array[i].links); - __timer_array[i].inuse = TIMER_FREE; - } - - for (i = 0; i < THREAD_MAXNODES; ++i) - list_append (&thread_free_list, &thread_array[i].links); - - thread_init (&__timer_signal_thread_rclk, 0, CLOCK_REALTIME); -#ifdef _POSIX_CPUTIME - thread_init (&__timer_signal_thread_pclk, 0, CLOCK_PROCESS_CPUTIME_ID); -#endif -#ifdef _POSIX_THREAD_CPUTIME - thread_init (&__timer_signal_thread_tclk, 0, CLOCK_THREAD_CPUTIME_ID); -#endif -} - - -/* This is a handler executed in a child process after a fork() - occurs. It reinitializes the module, resetting all of the data - structures to their initial state. The mutex is initialized in - case it was locked in the parent process. */ -static void -reinit_after_fork (void) -{ - init_module (); - pthread_mutex_init (&__timer_mutex, 0); -} - - -/* Called once form pthread_once in timer_init. This initializes the - module and ensures that reinit_after_fork will be executed in any - child process. */ -void -__timer_init_once (void) -{ - init_module (); -#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 3 - pthread_atfork (0, 0, reinit_after_fork); -#endif -} - - -/* Deinitialize a thread that is about to be deallocated. */ -static void -thread_deinit (struct thread_node *thread) -{ - assert (list_isempty (&thread->timer_queue)); - pthread_cond_destroy (&thread->cond); -} - - -/* Allocate a thread structure from the global free list. Global - mutex lock must be held by caller. The thread is moved to - the active list. */ -struct thread_node * -__timer_thread_alloc (const pthread_attr_t *desired_attr, clockid_t clock_id) -{ - struct list_links *node = list_first (&thread_free_list); - - if (node != list_null (&thread_free_list)) - { - struct thread_node *thread = thread_links2ptr (node); - list_unlink (node); - thread_init (thread, desired_attr, clock_id); - list_append (&thread_active_list, node); - return thread; - } - - return 0; -} - - -/* Return a thread structure to the global free list. Global lock - must be held by caller. */ -void -__timer_thread_dealloc (struct thread_node *thread) -{ - thread_deinit (thread); - list_unlink (&thread->links); - list_append (&thread_free_list, &thread->links); -} - - -/* Each of our threads which terminates executes this cleanup - handler. We never terminate threads ourselves; if a thread gets here - it means that the evil application has killed it. If the thread has - timers, these require servicing and so we must hire a replacement - thread right away. We must also unblock another thread that may - have been waiting for this thread to finish servicing a timer (see - timer_delete()). */ - -static void -thread_cleanup (void *val) -{ - if (val != NULL) - { - struct thread_node *thread = val; - - /* How did the signal thread get killed? */ - assert (thread != &__timer_signal_thread_rclk); -#ifdef _POSIX_CPUTIME - assert (thread != &__timer_signal_thread_pclk); -#endif -#ifdef _POSIX_THREAD_CPUTIME - assert (thread != &__timer_signal_thread_tclk); -#endif - - pthread_mutex_lock (&__timer_mutex); - - thread->exists = 0; - - /* We are no longer processing a timer event. */ - thread->current_timer = 0; - - if (list_isempty (&thread->timer_queue)) - __timer_thread_dealloc (thread); - else - (void) __timer_thread_start (thread); - - pthread_mutex_unlock (&__timer_mutex); - - /* Unblock potentially blocked timer_delete(). */ - pthread_cond_broadcast (&thread->cond); - } -} - - -/* Handle a timer which is supposed to go off now. */ -static void -thread_expire_timer (struct thread_node *self, struct timer_node *timer) -{ - self->current_timer = timer; /* Lets timer_delete know timer is running. */ - - pthread_mutex_unlock (&__timer_mutex); - - switch (__builtin_expect (timer->event.sigev_notify, SIGEV_SIGNAL)) - { - case SIGEV_NONE: - assert (! "timer_create should never have created such a timer"); - break; - - case SIGEV_SIGNAL: -#ifdef __NR_rt_sigqueueinfo - { - siginfo_t info; - - /* First, clear the siginfo_t structure, so that we don't pass our - stack content to other tasks. */ - memset (&info, 0, sizeof (siginfo_t)); - /* We must pass the information about the data in a siginfo_t - value. */ - info.si_signo = timer->event.sigev_signo; - info.si_code = SI_TIMER; - info.si_pid = timer->creator_pid; - info.si_uid = getuid (); - info.si_value = timer->event.sigev_value; - - INLINE_SYSCALL (rt_sigqueueinfo, 3, info.si_pid, info.si_signo, &info); - } -#else - if (pthread_kill (self->captured, timer->event.sigev_signo) != 0) - { - if (pthread_kill (self->id, timer->event.sigev_signo) != 0) - abort (); - } -#endif - break; - - case SIGEV_THREAD: - timer->event.sigev_notify_function (timer->event.sigev_value); - break; - - default: - assert (! "unknown event"); - break; - } - - pthread_mutex_lock (&__timer_mutex); - - self->current_timer = 0; - - pthread_cond_broadcast (&self->cond); -} - - -/* Thread function; executed by each timer thread. The job of this - function is to wait on the thread's timer queue and expire the - timers in chronological order as close to their scheduled time as - possible. */ -static void * -__attribute__ ((noreturn)) -thread_func (void *arg) -{ - struct thread_node *self = arg; - - /* Register cleanup handler, in case rogue application terminates - this thread. (This cannot happen to __timer_signal_thread, which - doesn't invoke application callbacks). */ - - pthread_cleanup_push (thread_cleanup, self); - - pthread_mutex_lock (&__timer_mutex); - - while (1) - { - struct list_links *first; - struct timer_node *timer = NULL; - - /* While the timer queue is not empty, inspect the first node. */ - first = list_first (&self->timer_queue); - if (first != list_null (&self->timer_queue)) - { - struct timespec now; - - timer = timer_links2ptr (first); - - /* This assumes that the elements of the list of one thread - are all for the same clock. */ - clock_gettime (timer->clock, &now); - - while (1) - { - /* If the timer is due or overdue, remove it from the queue. - If it's a periodic timer, re-compute its new time and - requeue it. Either way, perform the timer expiry. */ - if (timespec_compare (&now, &timer->expirytime) < 0) - break; - - list_unlink_ip (first); - - if (__builtin_expect (timer->value.it_interval.tv_sec, 0) != 0 - || timer->value.it_interval.tv_nsec != 0) - { - timespec_add (&timer->expirytime, &now, - &timer->value.it_interval); - __timer_thread_queue_timer (self, timer); - } - - thread_expire_timer (self, timer); - - first = list_first (&self->timer_queue); - if (first == list_null (&self->timer_queue)) - break; - - timer = timer_links2ptr (first); - } - } - - /* If the queue is not empty, wait until the expiry time of the - first node. Otherwise wait indefinitely. Insertions at the - head of the queue must wake up the thread by broadcasting - this condition variable. */ - if (timer != NULL) - pthread_cond_timedwait (&self->cond, &__timer_mutex, - &timer->expirytime); - else - pthread_cond_wait (&self->cond, &__timer_mutex); - } - /* This macro will never be executed since the while loop loops - forever - but we have to add it for proper nesting. */ - pthread_cleanup_pop (1); - -} - - -/* Enqueue a timer in wakeup order in the thread's timer queue. - Returns 1 if the timer was inserted at the head of the queue, - causing the queue's next wakeup time to change. */ - -int -__timer_thread_queue_timer (struct thread_node *thread, - struct timer_node *insert) -{ - struct list_links *iter; - int athead = 1; - - for (iter = list_first (&thread->timer_queue); - iter != list_null (&thread->timer_queue); - iter = list_next (iter)) - { - struct timer_node *timer = timer_links2ptr (iter); - - if (timespec_compare (&insert->expirytime, &timer->expirytime) < 0) - break; - athead = 0; - } - - list_insbefore (iter, &insert->links); - return athead; -} - - -/* Start a thread and associate it with the given thread node. Global - lock must be held by caller. */ -int -__timer_thread_start (struct thread_node *thread) -{ - int retval = 1; - - assert (!thread->exists); - thread->exists = 1; - - if (pthread_create (&thread->id, &thread->attr, thread_func, thread) != 0) - { - thread->exists = 0; - retval = -1; - } - - return retval; -} - - -void -__timer_thread_wakeup (struct thread_node *thread) -{ - pthread_cond_broadcast (&thread->cond); -} - - -/* Compare two pthread_attr_t thread attributes for exact equality. - Returns 1 if they are equal, otherwise zero if they are not equal or - contain illegal values. This version is LinuxThreads-specific for - performance reason. One could use the access functions to get the - values of all the fields of the attribute structure. */ -static int -thread_attr_compare (const pthread_attr_t *left, const pthread_attr_t *right) -{ - return (left->__detachstate == right->__detachstate - && left->__schedpolicy == right->__schedpolicy - && (left->__schedparam.sched_priority - == right->__schedparam.sched_priority) - && left->__inheritsched == right->__inheritsched - && left->__scope == right->__scope); -} - - -/* Search the list of active threads and find one which has matching - attributes. Global mutex lock must be held by caller. */ -struct thread_node * -__timer_thread_find_matching (const pthread_attr_t *desired_attr, - clockid_t desired_clock_id) -{ - struct list_links *iter = list_first (&thread_active_list); - - while (iter != list_null (&thread_active_list)) - { - struct thread_node *candidate = thread_links2ptr (iter); - - if (thread_attr_compare (desired_attr, &candidate->attr) - && desired_clock_id == candidate->clock_id) - { - list_unlink (iter); - return candidate; - } - - iter = list_next (iter); - } - - return NULL; -} - - -/* Grab a free timer structure from the global free list. The global - lock must be held by the caller. */ -struct timer_node * -__timer_alloc (void) -{ - struct list_links *node = list_first (&timer_free_list); - - if (node != list_null (&timer_free_list)) - { - struct timer_node *timer = timer_links2ptr (node); - list_unlink_ip (node); - timer->inuse = TIMER_INUSE; - timer->refcount = 1; - return timer; - } - - return NULL; -} - - -/* Return a timer structure to the global free list. The global lock - must be held by the caller. */ -void -__timer_dealloc (struct timer_node *timer) -{ - assert (timer->refcount == 0); - timer->thread = NULL; /* Break association between timer and thread. */ - timer->inuse = TIMER_FREE; - list_append (&timer_free_list, &timer->links); -} - - -/* Thread cancellation handler which unlocks a mutex. */ -void -__timer_mutex_cancel_handler (void *arg) -{ - pthread_mutex_unlock (arg); -} diff --git a/newlib/libc/sys/linux/linuxthreads/timer_settime.c b/newlib/libc/sys/linux/linuxthreads/timer_settime.c deleted file mode 100644 index 2f187fd18..000000000 --- a/newlib/libc/sys/linux/linuxthreads/timer_settime.c +++ /dev/null @@ -1,137 +0,0 @@ -/* Copyright (C) 2000, 2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Kaz Kylheku <kaz@ashi.footprints.net>. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <errno.h> -#include <pthread.h> -#include <time.h> - -#include "posix-timer.h" - - -/* Set timer TIMERID to VALUE, returning old value in OVLAUE. */ -int -timer_settime (timerid, flags, value, ovalue) - timer_t timerid; - int flags; - const struct itimerspec *value; - struct itimerspec *ovalue; -{ - struct timer_node *timer; - struct thread_node *thread = NULL; - struct timespec now; - int have_now = 0, need_wakeup = 0; - int retval = -1; - - timer = timer_id2ptr (timerid); - if (timer == NULL) - { - __set_errno (EINVAL); - goto bail; - } - - if (value->it_interval.tv_nsec < 0 - || value->it_interval.tv_nsec >= 1000000000 - || value->it_value.tv_nsec < 0 - || value->it_value.tv_nsec >= 1000000000) - { - __set_errno (EINVAL); - goto bail; - } - - /* Will need to know current time since this is a relative timer; - might as well make the system call outside of the lock now! */ - - if ((flags & TIMER_ABSTIME) == 0) - { - clock_gettime (timer->clock, &now); - have_now = 1; - } - - pthread_mutex_lock (&__timer_mutex); - timer_addref (timer); - - /* One final check of timer validity; this one is possible only - until we have the mutex, because it accesses the inuse flag. */ - - if (! timer_valid(timer)) - { - __set_errno (EINVAL); - goto unlock_bail; - } - - if (ovalue != NULL) - { - ovalue->it_interval = timer->value.it_interval; - - if (timer->armed) - { - if (! have_now) - { - pthread_mutex_unlock (&__timer_mutex); - clock_gettime (timer->clock, &now); - have_now = 1; - pthread_mutex_lock (&__timer_mutex); - timer_addref (timer); - } - - timespec_sub (&ovalue->it_value, &timer->expirytime, &now); - } - else - { - ovalue->it_value.tv_sec = 0; - ovalue->it_value.tv_nsec = 0; - } - } - - timer->value = *value; - - list_unlink_ip (&timer->links); - timer->armed = 0; - - thread = timer->thread; - - /* A value of { 0, 0 } causes the timer to be stopped. */ - if (value->it_value.tv_sec != 0 - || __builtin_expect (value->it_value.tv_nsec != 0, 1)) - { - if ((flags & TIMER_ABSTIME) != 0) - /* The user specified the expiration time. */ - timer->expirytime = value->it_value; - else - timespec_add (&timer->expirytime, &now, &value->it_value); - - /* Only need to wake up the thread if timer is inserted - at the head of the queue. */ - if (thread != NULL) - need_wakeup = __timer_thread_queue_timer (thread, timer); - timer->armed = 1; - } - - retval = 0; - -unlock_bail: - timer_delref (timer); - pthread_mutex_unlock (&__timer_mutex); - -bail: - if (thread != NULL && need_wakeup) - __timer_thread_wakeup (thread); - - return retval; -} diff --git a/newlib/libc/sys/linux/linuxthreads/tst-cancel.c b/newlib/libc/sys/linux/linuxthreads/tst-cancel.c deleted file mode 100644 index da32aaf5e..000000000 --- a/newlib/libc/sys/linux/linuxthreads/tst-cancel.c +++ /dev/null @@ -1,213 +0,0 @@ -/* Tests for cancelation handling. */ - -#include <pthread.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> -#include <sys/stat.h> - -int fd; - -pthread_barrier_t bar; - - -static void -cleanup (void *arg) -{ - int nr = (int) (long int) arg; - char s[30]; - char *cp = stpcpy (s, "cleanup "); - *cp++ = '0' + nr; - *cp++ = '\n'; - __libc_lseek (fd, 0, SEEK_END); - __libc_write (fd, s, cp - s); -} - - -static void * -t1 (void *arg) -{ - pthread_cleanup_push (cleanup, (void *) (long int) 1); - return NULL; - pthread_cleanup_pop (0); -} - - -static void -inner (int a) -{ - pthread_cleanup_push (cleanup, (void *) (long int) a); - if (a) - return; - pthread_cleanup_pop (0); -} - - -static void * -t2 (void *arg) -{ - pthread_cleanup_push (cleanup, (void *) (long int) 2); - inner ((int) (long int) arg); - return NULL; - pthread_cleanup_pop (0); -} - - -/* This does not work yet. */ -volatile int cleanupokcnt; - -static void -cleanupok (void *arg) -{ - ++cleanupokcnt; -} - - -static void * -t3 (void *arg) -{ - pthread_cleanup_push (cleanupok, (void *) (long int) 4); - inner ((int) (long int) arg); - pthread_exit (NULL); - pthread_cleanup_pop (0); -} - - -static void -innerok (int a) -{ - pthread_cleanup_push (cleanupok, (void *) (long int) a); - pthread_exit (NULL); - pthread_cleanup_pop (0); -} - - -static void * -t4 (void *arg) -{ - pthread_cleanup_push (cleanupok, (void *) (long int) 6); - innerok ((int) (long int) arg); - pthread_cleanup_pop (0); - return NULL; -} - - -int -main (int argc, char *argv[]) -{ - pthread_t td; - int err; - char *tmp; - const char *prefix; - const char template[] = "thtstXXXXXX"; - struct stat64 st; - int result = 0; - - prefix = argc > 1 ? argv[1] : ""; - tmp = (char *) alloca (strlen (prefix) + sizeof template); - strcpy (stpcpy (tmp, prefix), template); - - fd = mkstemp (tmp); - if (fd == -1) - { - printf ("cannot create temporary file: %m"); - exit (1); - } - unlink (tmp); - - err = pthread_barrier_init (&bar, NULL, 2); - if (err != 0 ) - { - printf ("cannot create barrier: %s\n", strerror (err)); - exit (1); - } - -#ifdef NOT_YET - err = pthread_create (&td, NULL, t1, NULL); - if (err != 0) - { - printf ("cannot create thread t1: %s\n", strerror (err)); - exit (1); - } - - err = pthread_join (td, NULL); - if (err != 0) - { - printf ("cannot join thread: %s\n", strerror (err)); - exit (1); - } - - err = pthread_create (&td, NULL, t2, (void *) 3); - if (err != 0) - { - printf ("cannot create thread t2: %s\n", strerror (err)); - exit (1); - } - - err = pthread_join (td, NULL); - if (err != 0) - { - printf ("cannot join thread: %s\n", strerror (err)); - exit (1); - } - - err = pthread_create (&td, NULL, t3, (void *) 5); - if (err != 0) - { - printf ("cannot create thread t3: %s\n", strerror (err)); - exit (1); - } - - err = pthread_join (td, NULL); - if (err != 0) - { - printf ("cannot join thread: %s\n", strerror (err)); - exit (1); - } -#endif - - err = pthread_create (&td, NULL, t4, (void *) 7); - if (err != 0) - { - printf ("cannot create thread t3: %s\n", strerror (err)); - exit (1); - } - - err = pthread_join (td, NULL); - if (err != 0) - { - printf ("cannot join thread: %s\n", strerror (err)); - exit (1); - } - - if (fstat64 (fd, &st) < 0) - { - printf ("cannot stat temporary file: %m\n"); - result = 1; - } - else if (st.st_size != 0) - { - char buf[512]; - puts ("some cleanup handlers ran:"); - fflush (stdout); - __lseek (fd, 0, SEEK_SET); - while (1) - { - ssize_t n = read (fd, buf, sizeof buf); - if (n <= 0) - break; - write (STDOUT_FILENO, buf, n); - } - result = 1; - } - - // if (cleanupokcnt != 3) will be three once t3 runs - if (cleanupokcnt != 2) - { - printf ("cleanupokcnt = %d\n", cleanupokcnt); - result = 1; - } - - return result; -} diff --git a/newlib/libc/sys/linux/linuxthreads/tst-context.c b/newlib/libc/sys/linux/linuxthreads/tst-context.c deleted file mode 100644 index 9066e837e..000000000 --- a/newlib/libc/sys/linux/linuxthreads/tst-context.c +++ /dev/null @@ -1,109 +0,0 @@ -#include <errno.h> -#include <error.h> -#include <pthread.h> -#include <stdio.h> -#include <stdlib.h> -#include <ucontext.h> - -#include "pt-machine.h" - - -#define N 4 - -#ifdef FLOATING_STACKS -static char stacks[N][8192]; -static ucontext_t ctx[N][2]; -static volatile int failures; - -static void -fct (long int n) -{ - /* Just to use the thread local descriptor. */ - printf ("%ld: in %s now\n", n, __FUNCTION__); - errno = 0; -} - -static void * -threadfct (void *arg) -{ - int n = (int) (long int) arg; - - if (getcontext (&ctx[n][1]) != 0) - { - printf ("%d: cannot get context: %m\n", n); - exit (1); - } - - printf ("%d: %s: before makecontext\n", n, __FUNCTION__); - - ctx[n][1].uc_stack.ss_sp = stacks[n]; - ctx[n][1].uc_stack.ss_size = 8192; - ctx[n][1].uc_link = &ctx[n][0]; - makecontext (&ctx[n][1], (void (*) (void)) fct, 1, (long int) n); - - printf ("%d: %s: before swapcontext\n", n, __FUNCTION__); - - if (swapcontext (&ctx[n][0], &ctx[n][1]) != 0) - { - ++failures; - printf ("%d: %s: swapcontext failed\n", n, __FUNCTION__); - } - else - printf ("%d: back in %s\n", n, __FUNCTION__); - - return NULL; -} -#endif - - -#ifdef FLOATING_STACKS -static volatile int global; -#endif - -int -main (void) -{ -#ifndef FLOATING_STACKS - puts ("not supported"); - return 0; -#else - int n; - pthread_t th[N]; - ucontext_t mctx; - - puts ("making contexts"); - if (getcontext (&mctx) != 0) - { - if (errno == ENOSYS) - { - puts ("context handling not supported"); - exit (0); - } - - printf ("%s: getcontext: %m\n", __FUNCTION__); - exit (1); - } - - /* Play some tricks with this context. */ - if (++global == 1) - if (setcontext (&mctx) != 0) - { - printf ("%s: setcontext: %m\n", __FUNCTION__); - exit (1); - } - if (global != 2) - { - printf ("%s: 'global' not incremented twice\n", __FUNCTION__); - exit (1); - } - - for (n = 0; n < N; ++n) - if (pthread_create (&th[n], NULL, threadfct, (void *) n) != 0) - error (EXIT_FAILURE, errno, "cannot create all threads"); - - for (n = 0; n < N; ++n) - pthread_join (th[n], NULL); - - return failures; -#endif -} diff --git a/newlib/libc/sys/linux/linuxthreads/tststack.c b/newlib/libc/sys/linux/linuxthreads/tststack.c deleted file mode 100644 index 6789ff861..000000000 --- a/newlib/libc/sys/linux/linuxthreads/tststack.c +++ /dev/null @@ -1,72 +0,0 @@ -/* Tests for variable stack size handling. - Copyright (C) 2000 Free Software Foundation, Inc. - Contributed by Ulrich Drepper <drepper@redhat.com>, 2000. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <pthread.h> -#include <stdio.h> -#include <unistd.h> - -static void *f1 (void *); -static void *f2 (void *); - -int -main (void) -{ - pthread_attr_t attr; - pthread_t th1 = 0; - pthread_t th2 = 0; - void *res1; - void *res2; - - pthread_attr_init (&attr); - if (pthread_attr_setstacksize (&attr, 70*1024) != 0) - { - puts ("invalid stack size"); - return 1; - } - - pthread_create (&th1, NULL, f1, NULL); - pthread_create (&th2, &attr, f2, NULL); - - pthread_join (th1, &res1); - pthread_join (th2, &res2); - - printf ("res1 = %p\n", res1); - printf ("res2 = %p\n", res2); - - return res1 != (void *) 1 || res2 != (void *) 2; -} - -static void * -f1 (void *parm) -{ - printf ("This is `%s'\n", __FUNCTION__); - fflush (stdout); - - return (void *) 1; -} - -static void * -f2 (void *parm) -{ - printf ("This is `%s'\n", __FUNCTION__); - fflush (stdout); - sleep (1); - - return (void *) 2; -} diff --git a/newlib/libc/sys/linux/linuxthreads/unload.c b/newlib/libc/sys/linux/linuxthreads/unload.c deleted file mode 100644 index c528df234..000000000 --- a/newlib/libc/sys/linux/linuxthreads/unload.c +++ /dev/null @@ -1,45 +0,0 @@ -/* Tests for non-unloading of libpthread. - Copyright (C) 2000 Free Software Foundation, Inc. - Contributed by Ulrich Drepper <drepper@redhat.com>, 2000. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <dlfcn.h> -#include <stdio.h> -#include <stdlib.h> -#include <gnu/lib-names.h> - -int -main (void) -{ - void *p = dlopen (PREFIX LIBPTHREAD_SO, RTLD_LAZY); - - if (p == NULL) - { - puts ("failed to load " LIBPTHREAD_SO); - exit (1); - } - - if (dlclose (p) != 0) - { - puts ("dlclose (" LIBPTHREAD_SO ") failed"); - exit (1); - } - - puts ("seems to work"); - - exit (0); -} diff --git a/newlib/libc/sys/linux/linuxthreads/weaks.c b/newlib/libc/sys/linux/linuxthreads/weaks.c deleted file mode 100644 index 6e2cf4bf1..000000000 --- a/newlib/libc/sys/linux/linuxthreads/weaks.c +++ /dev/null @@ -1,121 +0,0 @@ -/* The weak pthread functions for Linux. - Copyright (C) 1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <errno.h> -#include <limits.h> -#include <stdlib.h> -#include <shlib-compat.h> -#include <bp-sym.h> -#include "libc-symbols.h" - -extern int __pthread_return_0 (void); -extern int __pthread_return_1 (void); -extern void __pthread_return_void (void); -extern void weak_function pthread_exit (void *__retval) - __attribute__ ((noreturn)); - -/* Those are pthread functions which return 0 if successful. */ -weak_alias (__pthread_return_0, BP_SYM (__libc_pthread_attr_init_2_1)) -versioned_symbol (libpthread, BP_SYM (__libc_pthread_attr_init_2_1), - BP_SYM (pthread_attr_init), GLIBC_2_1); -#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1) -weak_alias (__pthread_return_0, BP_SYM (__libc_pthread_attr_init_2_0)) -compat_symbol (libpthread, BP_SYM (__libc_pthread_attr_init_2_0), - BP_SYM (pthread_attr_init), GLIBC_2_0); -#endif -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_destroy)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_setdetachstate)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_getdetachstate)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_setschedparam)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_getschedparam)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_setschedpolicy)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_getschedpolicy)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_setinheritsched)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_getinheritsched)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_setscope)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_getscope)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_setstackaddr)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_getstackaddr)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_setstacksize)) -weak_alias (__pthread_return_0, BP_SYM (pthread_attr_getstacksize)) -weak_alias (__pthread_return_0, BP_SYM (pthread_mutex_init)) -weak_alias (__pthread_return_0, BP_SYM (pthread_mutex_destroy)) -weak_alias (__pthread_return_0, BP_SYM (pthread_mutex_lock)) -weak_alias (__pthread_return_0, BP_SYM (pthread_mutex_trylock)) -weak_alias (__pthread_return_0, BP_SYM (pthread_mutex_unlock)) -weak_alias (__pthread_return_0, BP_SYM (pthread_mutexattr_init)) -weak_alias (__pthread_return_0, BP_SYM (pthread_mutexattr_destroy)) -weak_alias (__pthread_return_0, BP_SYM (pthread_mutexattr_settype)) -weak_alias (__pthread_return_0, BP_SYM (pthread_mutexattr_gettype)) -weak_alias (__pthread_return_0, BP_SYM (pthread_condattr_init)) -weak_alias (__pthread_return_0, BP_SYM (pthread_condattr_destroy)) -weak_alias (__pthread_return_0, BP_SYM (pthread_setschedparam)) -weak_alias (__pthread_return_0, BP_SYM (pthread_getschedparam)) -weak_alias (__pthread_return_0, BP_SYM (pthread_getcancelstate)) -weak_alias (__pthread_return_0, BP_SYM (pthread_setcancelstate)) -weak_alias (__pthread_return_0, BP_SYM (pthread_setcanceltype)) -weak_alias (__pthread_return_0, pthread_setconcurrency) -weak_alias (__pthread_return_0, pthread_getconcurrency) -weak_alias (__pthread_return_0, pthread_self) -weak_alias (__pthread_return_0, BP_SYM (pthread_cond_init)) -weak_alias (__pthread_return_0, BP_SYM (pthread_cond_destroy)) -weak_alias (__pthread_return_0, BP_SYM (pthread_cond_wait)) -weak_alias (__pthread_return_0, BP_SYM (pthread_cond_timedwait)) -weak_alias (__pthread_return_0, BP_SYM (pthread_cond_signal)) -weak_alias (__pthread_return_0, BP_SYM (pthread_cond_broadcast)) -weak_alias (__pthread_return_0, BP_SYM (pthread_rwlock_init)) -weak_alias (__pthread_return_0, BP_SYM (pthread_rwlock_destroy)) -weak_alias (__pthread_return_0, BP_SYM (pthread_rwlock_rdlock)) -weak_alias (__pthread_return_0, BP_SYM (pthread_rwlock_wrlock)) -weak_alias (__pthread_return_0, BP_SYM (pthread_rwlock_tryrdlock)) -weak_alias (__pthread_return_0, BP_SYM (pthread_rwlock_trywrlock)) -weak_alias (__pthread_return_0, BP_SYM (pthread_rwlock_unlock)) -weak_alias (__pthread_return_0, BP_SYM (pthread_rwlockattr_init)) -weak_alias (__pthread_return_0, BP_SYM (pthread_rwlockattr_destroy)) -weak_alias (__pthread_return_0, BP_SYM (pthread_rwlockattr_setpshared)) -weak_alias (__pthread_return_0, BP_SYM (pthread_rwlockattr_getpshared)) - - -/* Those are pthread functions which return 1 if successful. */ -weak_alias (__pthread_return_1, pthread_equal) - -/* pthread_exit () is a special case. */ -void -weak_function -pthread_exit (void *retval) -{ - exit (EXIT_SUCCESS); -} - -int -__pthread_return_0 (void) -{ - return 0; -} - -int -__pthread_return_1 (void) -{ - return 1; -} - -void -__pthread_return_void (void) -{ -} diff --git a/newlib/libc/sys/linux/linuxthreads/wrapsyscall.c b/newlib/libc/sys/linux/linuxthreads/wrapsyscall.c deleted file mode 100644 index ec1bc2a90..000000000 --- a/newlib/libc/sys/linux/linuxthreads/wrapsyscall.c +++ /dev/null @@ -1,251 +0,0 @@ -/* Wrapper arpund system calls to provide cancelation points. - Copyright (C) 1996,1997,1998,1999,2000,2001 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Ulrich Drepper <drepper@cygnus.com>, 1996. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Library General Public License as - published by the Free Software Foundation; either version 2 of the - License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Library General Public License for more details. - - You should have received a copy of the GNU Library General Public - License along with the GNU C Library; see the file COPYING.LIB. If not, - write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, - Boston, MA 02111-1307, USA. */ - -#include <fcntl.h> -#include <sys/mman.h> -#include <pthread.h> -#include <unistd.h> -#include <stdarg.h> -#include <stddef.h> -#include <stdlib.h> -#include <termios.h> -#include <sys/resource.h> -#include <sys/wait.h> -#include <sys/socket.h> -#include "libc-symbols.h" - - -#ifndef SHARED -/* We need a hook to force this file to be linked in when static - libpthread is used. */ -const int __pthread_provide_wrappers = 0; -#endif - -#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 2 -#define ELIX_2_PLUS -#endif - -#if !defined(_ELIX_LEVEL) || _ELIX_LEVEL >= 3 -#define ELIX_3_PLUS -#endif - -#define CANCELABLE_SYSCALL(res_type, name, param_list, params) \ -res_type __libc_##name param_list; \ -res_type \ -__attribute__ ((weak)) \ -name param_list \ -{ \ - res_type result; \ - int oldtype; \ - pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype); \ - result = __libc_##name params; \ - pthread_setcanceltype (oldtype, NULL); \ - return result; \ -} - -#define CANCELABLE_SYSCALL_VA(res_type, name, param_list, params, last_arg) \ -res_type __libc_##name param_list; \ -res_type \ -__attribute__ ((weak)) \ -name param_list \ -{ \ - res_type result; \ - int oldtype; \ - va_list ap; \ - pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &oldtype); \ - va_start (ap, last_arg); \ - result = __libc_##name params; \ - va_end (ap); \ - pthread_setcanceltype (oldtype, NULL); \ - return result; \ -} - - -/* close(2). */ -CANCELABLE_SYSCALL (int, close, (int fd), (fd)) -strong_alias (close, __close) - - -/* fcntl(2). */ -CANCELABLE_SYSCALL_VA (int, fcntl, (int fd, int cmd, ...), - (fd, cmd, va_arg (ap, long int)), cmd) -strong_alias (fcntl, __fcntl) - - -/* fsync(2). */ -CANCELABLE_SYSCALL (int, fsync, (int fd), (fd)) - - -/* lseek(2). */ -CANCELABLE_SYSCALL (off_t, lseek, (int fd, off_t offset, int whence), - (fd, offset, whence)) -strong_alias (lseek, __lseek) - - -#ifdef ELIX_2_PLUS -/* lseek64(2). */ -CANCELABLE_SYSCALL (loff_t, lseek64, (int fd, loff_t offset, int whence), - (fd, offset, whence)) -#endif - - -/* msync(2). */ -CANCELABLE_SYSCALL (int, msync, (__ptr_t addr, size_t length, int flags), - (addr, length, flags)) - - -/* nanosleep(2). */ -CANCELABLE_SYSCALL (int, nanosleep, (const struct timespec *requested_time, - struct timespec *remaining), - (requested_time, remaining)) - - -/* open(2). */ -CANCELABLE_SYSCALL_VA (int, open, (const char *pathname, int flags, ...), - (pathname, flags, va_arg (ap, int)), flags) -strong_alias (open, __open) - - -#ifdef ELIX_2_PLUS -/* open64(3). */ -CANCELABLE_SYSCALL_VA (int, open64, (const char *pathname, int flags, ...), - (pathname, flags, va_arg (ap, int)), flags) -strong_alias (open64, __open64) -#endif - - -/* pause(2). */ -CANCELABLE_SYSCALL (int, pause, (void), ()) - - -/* pread(3). */ -CANCELABLE_SYSCALL (ssize_t, pread, (int fd, void *buf, size_t count, - off_t offset), - (fd, buf, count, offset)) - - -#ifdef ELIX_2_PLUS -/* pread64(3). */ -CANCELABLE_SYSCALL (ssize_t, pread64, (int fd, void *buf, size_t count, - loff_t offset), - (fd, buf, count, offset)) -strong_alias (pread64, __pread64) -#endif - - -/* pwrite(3). */ -CANCELABLE_SYSCALL (ssize_t, pwrite, (int fd, const void *buf, size_t n, - off_t offset), - (fd, buf, n, offset)) - - -#ifdef ELIX_2_PLUS -/* pwrite64(3). */ -CANCELABLE_SYSCALL (ssize_t, pwrite64, (int fd, const void *buf, size_t n, - loff_t offset), - (fd, buf, n, offset)) -strong_alias (pwrite64, __pwrite64) -#endif - - -/* read(2). */ -CANCELABLE_SYSCALL (ssize_t, read, (int fd, void *buf, size_t count), - (fd, buf, count)) -strong_alias (read, __read) - - -#ifdef ELIX_3_PLUS -/* system(3). */ -CANCELABLE_SYSCALL (int, system, (const char *line), (line)) -#endif - - -/* tcdrain(2). */ -CANCELABLE_SYSCALL (int, tcdrain, (int fd), (fd)) - - -#ifdef ELIX_3_PLUS -/* wait(2). */ -CANCELABLE_SYSCALL (__pid_t, wait, (int *stat_loc), (stat_loc)) -strong_alias (wait, __wait) -#endif - - -#ifdef ELIX_3_PLUS -/* waitpid(2). */ -CANCELABLE_SYSCALL (__pid_t, waitpid, (__pid_t pid, int *stat_loc, - int options), - (pid, stat_loc, options)) -#endif - -/* for libpthread usage */ -CANCELABLE_SYSCALL (__pid_t, __waitpid, (__pid_t pid, int *stat_loc, - int options), - (pid, stat_loc, options)) - -/* write(2). */ -CANCELABLE_SYSCALL (ssize_t, write, (int fd, const void *buf, size_t n), - (fd, buf, n)) -strong_alias (write, __write) - - -/* The following system calls are thread cancellation points specified - in XNS. */ - -/* accept(2). */ -CANCELABLE_SYSCALL (int, accept, (int fd, __SOCKADDR_ARG addr, - socklen_t *addr_len), - (fd, addr, addr_len)) - -/* connect(2). */ -CANCELABLE_SYSCALL (int, connect, (int fd, __CONST_SOCKADDR_ARG addr, - socklen_t len), - (fd, addr, len)) -strong_alias (connect, __connect) - -/* recv(2). */ -CANCELABLE_SYSCALL (ssize_t, recv, (int fd, __ptr_t buf, size_t n, int flags), - (fd, buf, n, flags)) - -/* recvfrom(2). */ -CANCELABLE_SYSCALL (ssize_t, recvfrom, (int fd, __ptr_t buf, size_t n, int flags, - __SOCKADDR_ARG addr, socklen_t *addr_len), - (fd, buf, n, flags, addr, addr_len)) - -/* recvmsg(2). */ -CANCELABLE_SYSCALL (ssize_t, recvmsg, (int fd, struct msghdr *message, int flags), - (fd, message, flags)) - -/* send(2). */ -CANCELABLE_SYSCALL (ssize_t, send, (int fd, const __ptr_t buf, size_t n, - int flags), - (fd, buf, n, flags)) -strong_alias (send, __send) - -/* sendmsg(2). */ -CANCELABLE_SYSCALL (ssize_t, sendmsg, (int fd, const struct msghdr *message, - int flags), - (fd, message, flags)) - -/* sendto(2). */ -CANCELABLE_SYSCALL (ssize_t, sendto, (int fd, const __ptr_t buf, size_t n, - int flags, __CONST_SOCKADDR_ARG addr, - socklen_t addr_len), - (fd, buf, n, flags, addr, addr_len)) |