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authorcvs2svn <>2006-03-21 03:57:35 +0300
committercvs2svn <>2006-03-21 03:57:35 +0300
commitf84325d0899e5052fd59892ece265f7c2bd6c6a7 (patch)
treefdbea2e5c834b2c023ecd6f1f15ea1474186a4e1 /winsup/cygserver/sysv_sem.cc
parent3078fb4f360e44b436bafcd9e7c51f26792e34b4 (diff)
This commit was manufactured by cvs2svn to create branch 'newlib-newlib-csl-20060320-branchpoint
csl-20060320-branch'. Sprout from master 2006-03-21 00:57:34 UTC Mark Mitchell <mark@codesourcery.com> ' * acconfig.h (_ATEXIT_DYNAMIC_ALLOC): Undef.' Cherrypick from cygnus 1999-05-03 07:29:06 UTC Richard Henderson <rth@redhat.com> '19990502 sourceware import': README config/mh-armpic config/mh-elfalphapic config/mh-m68kpic config/mh-papic config/mh-ppcpic config/mh-x86pic config/mt-d30v config/mt-netware config/mt-ospace etc/add-log.el etc/add-log.vi etc/configbuild.ein etc/configbuild.fig etc/configbuild.jin etc/configbuild.tin etc/configdev.ein etc/configdev.fig etc/configdev.jin etc/configdev.tin etc/configure etc/configure.in makefile.vms Delete: compile djunpack.bat include/COPYING include/ChangeLog include/ChangeLog-9103 include/MAINTAINERS include/alloca-conf.h include/ansidecl.h include/aout/ChangeLog include/aout/adobe.h include/aout/aout64.h include/aout/ar.h include/aout/dynix3.h include/aout/encap.h include/aout/host.h include/aout/hp.h include/aout/hp300hpux.h include/aout/hppa.h include/aout/ranlib.h include/aout/reloc.h include/aout/stab.def include/aout/stab_gnu.h include/aout/sun4.h include/bfdlink.h include/bin-bugs.h include/bout.h include/coff/ChangeLog include/coff/ChangeLog-9103 include/coff/alpha.h include/coff/apollo.h include/coff/arm.h include/coff/aux-coff.h include/coff/ecoff.h include/coff/external.h include/coff/go32exe.h include/coff/h8300.h include/coff/h8500.h include/coff/i386.h include/coff/i860.h include/coff/i960.h include/coff/ia64.h include/coff/internal.h include/coff/m68k.h include/coff/m88k.h include/coff/maxq.h include/coff/mcore.h include/coff/mips.h include/coff/mipspe.h include/coff/or32.h include/coff/pe.h include/coff/powerpc.h include/coff/rs6000.h include/coff/rs6k64.h include/coff/sh.h include/coff/sparc.h include/coff/sym.h include/coff/symconst.h include/coff/ti.h include/coff/tic30.h include/coff/tic4x.h include/coff/tic54x.h include/coff/tic80.h include/coff/w65.h include/coff/we32k.h include/coff/xcoff.h include/coff/z80.h include/coff/z8k.h include/demangle.h include/dis-asm.h include/dyn-string.h include/elf/ChangeLog 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winsup/w32api/include/oleauto.h winsup/w32api/include/olectl.h winsup/w32api/include/olectlid.h winsup/w32api/include/oledlg.h winsup/w32api/include/oleidl.h winsup/w32api/include/pbt.h winsup/w32api/include/poppack.h winsup/w32api/include/powrprof.h winsup/w32api/include/prsht.h winsup/w32api/include/psapi.h winsup/w32api/include/pshpack1.h winsup/w32api/include/pshpack2.h winsup/w32api/include/pshpack4.h winsup/w32api/include/pshpack8.h winsup/w32api/include/rapi.h winsup/w32api/include/ras.h winsup/w32api/include/rasdlg.h winsup/w32api/include/raserror.h winsup/w32api/include/rassapi.h winsup/w32api/include/reason.h winsup/w32api/include/regstr.h winsup/w32api/include/richedit.h winsup/w32api/include/richole.h winsup/w32api/include/rpc.h winsup/w32api/include/rpcdce.h winsup/w32api/include/rpcdce2.h winsup/w32api/include/rpcdcep.h winsup/w32api/include/rpcndr.h winsup/w32api/include/rpcnsi.h winsup/w32api/include/rpcnsip.h winsup/w32api/include/rpcnterr.h winsup/w32api/include/rpcproxy.h winsup/w32api/include/schannel.h winsup/w32api/include/schnlsp.h winsup/w32api/include/scrnsave.h winsup/w32api/include/sddl.h winsup/w32api/include/secext.h winsup/w32api/include/security.h winsup/w32api/include/servprov.h winsup/w32api/include/setupapi.h winsup/w32api/include/shellapi.h winsup/w32api/include/shldisp.h winsup/w32api/include/shlguid.h winsup/w32api/include/shlobj.h winsup/w32api/include/shlwapi.h winsup/w32api/include/snmp.h winsup/w32api/include/sql.h winsup/w32api/include/sqlext.h winsup/w32api/include/sqltypes.h winsup/w32api/include/sqlucode.h winsup/w32api/include/sspi.h winsup/w32api/include/subauth.h winsup/w32api/include/svcguid.h winsup/w32api/include/tlhelp32.h winsup/w32api/include/tmschema.h winsup/w32api/include/unknwn.h winsup/w32api/include/userenv.h winsup/w32api/include/uxtheme.h winsup/w32api/include/vfw.h winsup/w32api/include/w32api.h winsup/w32api/include/winable.h winsup/w32api/include/winbase.h winsup/w32api/include/winber.h winsup/w32api/include/wincon.h winsup/w32api/include/wincrypt.h winsup/w32api/include/windef.h winsup/w32api/include/windns.h winsup/w32api/include/windows.h winsup/w32api/include/windowsx.h winsup/w32api/include/winerror.h winsup/w32api/include/wingdi.h winsup/w32api/include/wininet.h winsup/w32api/include/winioctl.h winsup/w32api/include/winldap.h winsup/w32api/include/winnetwk.h winsup/w32api/include/winnls.h winsup/w32api/include/winnt.h winsup/w32api/include/winperf.h winsup/w32api/include/winreg.h winsup/w32api/include/winresrc.h winsup/w32api/include/winsnmp.h winsup/w32api/include/winsock.h winsup/w32api/include/winsock2.h winsup/w32api/include/winspool.h winsup/w32api/include/winsvc.h winsup/w32api/include/winuser.h winsup/w32api/include/winver.h winsup/w32api/include/ws2spi.h winsup/w32api/include/ws2tcpip.h winsup/w32api/include/wsahelp.h winsup/w32api/include/wsipx.h winsup/w32api/include/wsnetbs.h winsup/w32api/include/wtypes.h winsup/w32api/include/zmouse.h winsup/w32api/install-sh winsup/w32api/lib/Makefile.in winsup/w32api/lib/aclui.def winsup/w32api/lib/advapi32.def winsup/w32api/lib/avicap32.def winsup/w32api/lib/avifil32.def winsup/w32api/lib/cap.def winsup/w32api/lib/comctl32.def winsup/w32api/lib/comdlg32.def winsup/w32api/lib/crypt32.def winsup/w32api/lib/ctl3d32.def winsup/w32api/lib/ddk/Makefile.in winsup/w32api/lib/ddk/apcups.def winsup/w32api/lib/ddk/cfgmgr32.def winsup/w32api/lib/ddk/dxapi.def winsup/w32api/lib/ddk/hal.def winsup/w32api/lib/ddk/hid.def winsup/w32api/lib/ddk/hidparse.def winsup/w32api/lib/ddk/mcd.def winsup/w32api/lib/ddk/ndis.def winsup/w32api/lib/ddk/newdev.def winsup/w32api/lib/ddk/ntoskrnl.def winsup/w32api/lib/ddk/scsiport.def winsup/w32api/lib/ddk/tdi.def winsup/w32api/lib/ddk/usbcamd.def winsup/w32api/lib/ddk/usbcamd2.def winsup/w32api/lib/ddk/videoprt.def winsup/w32api/lib/ddk/win32k.def winsup/w32api/lib/dhcpcsvc.def winsup/w32api/lib/directx/Makefile.in winsup/w32api/lib/directx/d3d8.def winsup/w32api/lib/directx/d3d9.def winsup/w32api/lib/directx/d3dim.def winsup/w32api/lib/directx/d3drm.def winsup/w32api/lib/directx/d3dx8d.def winsup/w32api/lib/directx/d3dx9d.def winsup/w32api/lib/directx/d3dxof.def winsup/w32api/lib/directx/ddraw.def winsup/w32api/lib/directx/dinput.def winsup/w32api/lib/directx/dinput8.def winsup/w32api/lib/directx/dinput_joy.c winsup/w32api/lib/directx/dinput_joy2.c winsup/w32api/lib/directx/dinput_kbd.c winsup/w32api/lib/directx/dinput_mouse.c winsup/w32api/lib/directx/dinput_mouse2.c winsup/w32api/lib/directx/dinput_private.h winsup/w32api/lib/directx/dmoguids.c winsup/w32api/lib/directx/dplayx.def winsup/w32api/lib/directx/dpnaddr.def winsup/w32api/lib/directx/dpnet.def winsup/w32api/lib/directx/dpnlobby.def winsup/w32api/lib/directx/dpvoice.def winsup/w32api/lib/directx/dsetup.def winsup/w32api/lib/directx/dsound.def winsup/w32api/lib/directx/dxerr.c winsup/w32api/lib/directx/dxerr8.c winsup/w32api/lib/directx/dxerr8w.c winsup/w32api/lib/directx/dxerr9.c winsup/w32api/lib/directx/dxerr9w.c winsup/w32api/lib/directx/dxguid.c winsup/w32api/lib/directx/ksproxy.def winsup/w32api/lib/directx/ksuser.c winsup/w32api/lib/directx/ksuser.def winsup/w32api/lib/directx/msdmo.def winsup/w32api/lib/directx/quartz.def winsup/w32api/lib/directx/strmiids.c winsup/w32api/lib/directx/test.c winsup/w32api/lib/dlcapi.def winsup/w32api/lib/dnsapi.def winsup/w32api/lib/faultrep.def winsup/w32api/lib/gdi32.def winsup/w32api/lib/glaux.def winsup/w32api/lib/glu32.def winsup/w32api/lib/glut.def winsup/w32api/lib/glut32.def winsup/w32api/lib/igmpagnt.def winsup/w32api/lib/imagehlp.def winsup/w32api/lib/imm32.def winsup/w32api/lib/iphlpapi.def winsup/w32api/lib/kernel32.c winsup/w32api/lib/kernel32.def winsup/w32api/lib/largeint.c winsup/w32api/lib/lz32.def winsup/w32api/lib/mapi32.def winsup/w32api/lib/mfcuia32.def winsup/w32api/lib/mgmtapi.def winsup/w32api/lib/mpr.def winsup/w32api/lib/msacm32.def winsup/w32api/lib/mshtml-uuid.c winsup/w32api/lib/msimg32.def winsup/w32api/lib/msvcp60.def winsup/w32api/lib/msvfw32.def winsup/w32api/lib/mswsock.def winsup/w32api/lib/msxml-uuid.c winsup/w32api/lib/nddeapi.def winsup/w32api/lib/netapi32.def winsup/w32api/lib/ntdll.def winsup/w32api/lib/odbc32.def winsup/w32api/lib/odbccp32.def winsup/w32api/lib/ole32.def winsup/w32api/lib/oleacc.def winsup/w32api/lib/oleaut32.def winsup/w32api/lib/olecli32.def winsup/w32api/lib/oledlg.def winsup/w32api/lib/olepro32.def winsup/w32api/lib/olesvr32.def winsup/w32api/lib/opengl32.def winsup/w32api/lib/penwin32.def winsup/w32api/lib/pkpd32.def winsup/w32api/lib/powrprof.def winsup/w32api/lib/psapi.def winsup/w32api/lib/rapi.def winsup/w32api/lib/rasapi32.def winsup/w32api/lib/rasdlg.def winsup/w32api/lib/res.rc winsup/w32api/lib/rpcdce4.def winsup/w32api/lib/rpcns4.def winsup/w32api/lib/rpcrt4.def winsup/w32api/lib/scrnsave.c winsup/w32api/lib/secur32.def winsup/w32api/lib/setupapi.def winsup/w32api/lib/shell32.c winsup/w32api/lib/shell32.def winsup/w32api/lib/shfolder.def winsup/w32api/lib/shlwapi.def winsup/w32api/lib/snmpapi.def winsup/w32api/lib/svrapi.def winsup/w32api/lib/tapi32.def winsup/w32api/lib/test.c winsup/w32api/lib/th32.def winsup/w32api/lib/thunk32.def winsup/w32api/lib/url.def winsup/w32api/lib/user32.def winsup/w32api/lib/userenv.def winsup/w32api/lib/uuid.c winsup/w32api/lib/uxtheme.def winsup/w32api/lib/vdmdbg.def winsup/w32api/lib/version.def winsup/w32api/lib/vfw32.mri winsup/w32api/lib/win32spl.def winsup/w32api/lib/wininet.def winsup/w32api/lib/winmm.def winsup/w32api/lib/winspool.def winsup/w32api/lib/winstrm.def winsup/w32api/lib/wldap32.def winsup/w32api/lib/wow32.def winsup/w32api/lib/ws2_32.c winsup/w32api/lib/ws2_32.def winsup/w32api/lib/wsnmp32.def winsup/w32api/lib/wsock32.def winsup/w32api/lib/wst.def winsup/w32api/lib/wtsapi32.def
Diffstat (limited to 'winsup/cygserver/sysv_sem.cc')
-rw-r--r--winsup/cygserver/sysv_sem.cc1386
1 files changed, 0 insertions, 1386 deletions
diff --git a/winsup/cygserver/sysv_sem.cc b/winsup/cygserver/sysv_sem.cc
deleted file mode 100644
index bee24abbd..000000000
--- a/winsup/cygserver/sysv_sem.cc
+++ /dev/null
@@ -1,1386 +0,0 @@
-/*
- * Implementation of SVID semaphores
- *
- * Author: Daniel Boulet
- *
- * This software is provided ``AS IS'' without any warranties of any kind.
- */
-
-/*
- * This file is heavily changed to become part of Cygwin's cygserver.
- */
-
-#ifdef __OUTSIDE_CYGWIN__
-#include "woutsup.h"
-#include <sys/cygwin.h>
-#include <sys/cdefs.h>
-#ifndef __FBSDID
-#define __FBSDID(s) const char version[] = (s)
-#endif
-__FBSDID("$FreeBSD: /repoman/r/ncvs/src/sys/kern/sysv_sem.c,v 1.70 2004/05/30 20:34:58 phk Exp $");
-/* CV, 2006-01-09: Inspected upstream up to version 1.78. */
-
-#define _KERNEL 1
-#define __BSD_VISIBLE 1
-#include <sys/types.h>
-#include <sys/ipc.h>
-
-#include <sys/param.h>
-#include <sys/sysproto.h>
-#include <sys/lock.h>
-#include <sys/sem.h>
-#include <sys/queue.h>
-#include <malloc.h>
-#include <errno.h>
-#include <time.h>
-#include "cygserver.h"
-#include "process.h"
-#include "cygserver_ipc.h"
-#include <sys/smallprint.h>
-
-#ifdef __CYGWIN__
-#define __semctl semctl
-#define __semctl_args semctl_args
-#define SEM_DEBUG
-#endif /* __CYGWIN__ */
-
-#ifdef SEM_DEBUG
-#define DPRINTF(a) debug_printf a
-#else
-#define DPRINTF(a)
-#endif
-
-static int semvalid(int semid, struct semid_ds *semaptr);
-
-static struct sem_undo *semu_alloc(struct thread *td);
-static int semundo_adjust(struct thread *td, struct sem_undo **supptr,
- int semid, int semnum, int adjval);
-static void semundo_clear(int semid, int semnum, struct thread *td);
-
-#ifndef _SYS_SYSPROTO_H_
-struct __semctl_args;
-int __semctl(struct thread *td, struct __semctl_args *uap);
-struct semget_args;
-int semget(struct thread *td, struct semget_args *uap);
-struct semop_args;
-int semop(struct thread *td, struct semop_args *uap);
-#endif
-
-#ifndef __CYGWIN__
-/* XXX casting to (sy_call_t *) is bogus, as usual. */
-static sy_call_t *semcalls[] = {
- (sy_call_t *)__semctl, (sy_call_t *)semget,
- (sy_call_t *)semop
-};
-#endif
-
-static struct mtx sem_mtx; /* semaphore global lock */
-static int semtots = 0;
-static int semtot = 0;
-static struct semid_ds *sema; /* semaphore id pool */
-static struct mtx *sema_mtx; /* semaphore id pool mutexes*/
-static struct sem *sem; /* semaphore pool */
-static SLIST_HEAD(, sem_undo) semu_list; /* list of active undo structures */
-static int *semu; /* undo structure pool */
-#ifndef __CYGWIN__
-static eventhandler_tag semexit_tag;
-#endif /* __CYGWIN__ */
-
-#define SEMUNDO_MTX sem_mtx
-#define SEMUNDO_LOCK() mtx_lock(&SEMUNDO_MTX);
-#define SEMUNDO_HOOKLOCK() _mtx_lock(&SEMUNDO_MTX, p->winpid, __FILE__, __LINE__);
-#define SEMUNDO_UNLOCK() mtx_unlock(&SEMUNDO_MTX);
-#define SEMUNDO_LOCKASSERT(how,pid) mtx_assert(&SEMUNDO_MTX, (how), (pid));
-
-struct sem {
- u_short semval; /* semaphore value */
- pid_t sempid; /* pid of last operation */
- u_short semncnt; /* # awaiting semval > cval */
- u_short semzcnt; /* # awaiting semval = 0 */
-};
-
-/*
- * Undo structure (one per process)
- */
-struct undo {
- short un_adjval; /* adjust on exit values */
- short un_num; /* semaphore # */
- int un_id; /* semid */
-} un_ent[1]; /* undo entries */
-
-struct sem_undo {
- SLIST_ENTRY(sem_undo) un_next; /* ptr to next active undo structure */
-#ifdef __CYGWIN__
- DWORD un_proc; /* owner of this structure */
-#else
- struct proc *un_proc; /* owner of this structure */
-#endif
- short un_cnt; /* # of active entries */
- struct undo un_ent[1]; /* undo entries */
-};
-
-/*
- * Configuration parameters
- */
-#ifndef SEMMNI
-#define SEMMNI 10 /* # of semaphore identifiers */
-#endif
-#ifndef SEMMNS
-#define SEMMNS 60 /* # of semaphores in system */
-#endif
-#ifndef SEMUME
-#define SEMUME 10 /* max # of undo entries per process */
-#endif
-#ifndef SEMMNU
-#define SEMMNU 30 /* # of undo structures in system */
-#endif
-
-/* shouldn't need tuning */
-#ifndef SEMMAP
-#define SEMMAP 30 /* # of entries in semaphore map */
-#endif
-#ifndef SEMMSL
-#define SEMMSL SEMMNS /* max # of semaphores per id */
-#endif
-#ifndef SEMOPM
-#define SEMOPM 100 /* max # of operations per semop call */
-#endif
-
-#ifndef SEMVMX
-#define SEMVMX 32767 /* semaphore maximum value */
-#endif
-#ifndef SEMAEM
-#define SEMAEM 16384 /* adjust on exit max value */
-#endif
-
-#ifdef __CYGWIN__
-/* gcc 3.4 defines a new offsetof which is different for C++. Since this
- file is just a derived plain-C file, we need to revert to the plain-C
- definition of offsetof. */
-#ifdef offsetof
-#undef offsetof
-#endif
-#define offsetof(TYPE, MEMBER) ((size_t) &((TYPE *)0)->MEMBER)
-#endif /* __CYGWIN__ */
-/*
- * Due to the way semaphore memory is allocated, we have to ensure that
- * SEMUSZ is properly aligned.
- */
-
-#define SEM_ALIGN(bytes) (((bytes) + (sizeof(long) - 1)) & ~(sizeof(long) - 1))
-
-/* actual size of an undo structure */
-#define SEMUSZ SEM_ALIGN(offsetof(struct sem_undo, un_ent[SEMUME]))
-
-/*
- * Macro to find a particular sem_undo vector
- */
-#define SEMU(ix) \
- ((struct sem_undo *)(((intptr_t)semu)+ix * seminfo.semusz))
-
-/*
- * semaphore info struct
- */
-struct seminfo seminfo = {
- SEMMNI, /* # of semaphore identifiers */
- SEMMNS, /* # of semaphores in system */
- SEMMSL, /* max # of semaphores per id */
- SEMOPM, /* max # of operations per semop call */
- SEMMNU, /* # of undo structures in system */
- SEMUME, /* max # of undo entries per process */
- SEMVMX, /* semaphore maximum value */
- SEMAEM, /* adjust on exit max value */
- SEMMAP, /* # of entries in semaphore map */
- SEMUSZ /* size in bytes of undo structure */
-};
-
-#ifndef __CYGWIN__
-SYSCTL_DECL(_kern_ipc);
-SYSCTL_INT(_kern_ipc, OID_AUTO, semmap, CTLFLAG_RW, &seminfo.semmap, 0, "");
-SYSCTL_INT(_kern_ipc, OID_AUTO, semmni, CTLFLAG_RDTUN, &seminfo.semmni, 0, "");
-SYSCTL_INT(_kern_ipc, OID_AUTO, semmns, CTLFLAG_RDTUN, &seminfo.semmns, 0, "");
-SYSCTL_INT(_kern_ipc, OID_AUTO, semmnu, CTLFLAG_RDTUN, &seminfo.semmnu, 0, "");
-SYSCTL_INT(_kern_ipc, OID_AUTO, semmsl, CTLFLAG_RW, &seminfo.semmsl, 0, "");
-SYSCTL_INT(_kern_ipc, OID_AUTO, semopm, CTLFLAG_RDTUN, &seminfo.semopm, 0, "");
-SYSCTL_INT(_kern_ipc, OID_AUTO, semume, CTLFLAG_RDTUN, &seminfo.semume, 0, "");
-SYSCTL_INT(_kern_ipc, OID_AUTO, semusz, CTLFLAG_RDTUN, &seminfo.semusz, 0, "");
-SYSCTL_INT(_kern_ipc, OID_AUTO, semvmx, CTLFLAG_RW, &seminfo.semvmx, 0, "");
-SYSCTL_INT(_kern_ipc, OID_AUTO, semaem, CTLFLAG_RW, &seminfo.semaem, 0, "");
-SYSCTL_PROC(_kern_ipc, OID_AUTO, sema, CTLFLAG_RD,
- NULL, 0, sysctl_sema, "", "");
-#endif /* __CYGWIN__ */
-
-void
-seminit(void)
-{
- int i;
-
- TUNABLE_INT_FETCH("kern.ipc.semmap", &seminfo.semmap);
- TUNABLE_INT_FETCH("kern.ipc.semmni", &seminfo.semmni);
- TUNABLE_INT_FETCH("kern.ipc.semmns", &seminfo.semmns);
- TUNABLE_INT_FETCH("kern.ipc.semmnu", &seminfo.semmnu);
- TUNABLE_INT_FETCH("kern.ipc.semmsl", &seminfo.semmsl);
- TUNABLE_INT_FETCH("kern.ipc.semopm", &seminfo.semopm);
- TUNABLE_INT_FETCH("kern.ipc.semume", &seminfo.semume);
- TUNABLE_INT_FETCH("kern.ipc.semusz", &seminfo.semusz);
- TUNABLE_INT_FETCH("kern.ipc.semvmx", &seminfo.semvmx);
- TUNABLE_INT_FETCH("kern.ipc.semaem", &seminfo.semaem);
-
-#ifdef __CYGWIN__
- /* It's too dangerous a setting to leave it alone.
- Keep that clean here. */
- seminfo.semusz = SEM_ALIGN(offsetof(struct sem_undo,
- un_ent[seminfo.semume]));
-#endif /* __CYGWIN__ */
-
- sem = (struct sem *) sys_malloc(sizeof(struct sem) * seminfo.semmns, M_SEM, M_WAITOK);
- sema = (struct semid_ds *) sys_malloc(sizeof(struct semid_ds) * seminfo.semmni, M_SEM,
- M_WAITOK);
- sema_mtx = (struct mtx *) sys_malloc(sizeof(struct mtx) * seminfo.semmni, M_SEM,
- M_WAITOK | M_ZERO);
- semu = (int *) sys_malloc(seminfo.semmnu * seminfo.semusz, M_SEM, M_WAITOK);
-
- for (i = 0; i < seminfo.semmni; i++) {
- sema[i].sem_base = 0;
- sema[i].sem_perm.mode = 0;
- sema[i].sem_perm.seq = 0;
- }
- for (i = 0; i < seminfo.semmni; i++)
- {
- char *buf = (char *)malloc (16);
- __small_sprintf (buf, "semid[%d]", i);
- mtx_init(&sema_mtx[i], buf, NULL, MTX_DEF);
- }
- for (i = 0; i < seminfo.semmnu; i++) {
- struct sem_undo *suptr = SEMU(i);
-#ifdef __CYGWIN__
- suptr->un_proc = 0;
-#else
- suptr->un_proc = NULL;
-#endif
- }
- SLIST_INIT(&semu_list);
- mtx_init(&sem_mtx, "sem", NULL, MTX_DEF);
-#ifndef __CYGWIN__
- semexit_tag = EVENTHANDLER_REGISTER(process_exit, semexit_myhook, NULL,
- EVENTHANDLER_PRI_ANY);
-#endif /* __CYGWIN__ */
-}
-
-int
-semunload(void)
-{
-#ifndef __CYGWIN__ /* Would result in being unable to shutdown the
- server gracefully. */
- if (semtot != 0)
- return (EBUSY);
-
- EVENTHANDLER_DEREGISTER(process_exit, semexit_tag);
-#endif /* __CYGWIN__ */
- sys_free(sem, M_SEM);
- sys_free(sema, M_SEM);
- sys_free(semu, M_SEM);
- for (int i = 0; i < seminfo.semmni; i++)
- mtx_destroy(&sema_mtx[i]);
- mtx_destroy(&sem_mtx);
- return (0);
-}
-
-#ifndef __CYGWIN__
-static int
-sysvsem_modload(struct module *module, int cmd, void *arg)
-{
- int error = 0;
-
- switch (cmd) {
- case MOD_LOAD:
- seminit();
- break;
- case MOD_UNLOAD:
- error = semunload();
- break;
- case MOD_SHUTDOWN:
- break;
- default:
- error = EINVAL;
- break;
- }
- return (error);
-}
-
-static moduledata_t sysvsem_mod = {
- "sysvsem",
- &sysvsem_modload,
- NULL
-};
-
-SYSCALL_MODULE_HELPER(semsys);
-SYSCALL_MODULE_HELPER(__semctl);
-SYSCALL_MODULE_HELPER(semget);
-SYSCALL_MODULE_HELPER(semop);
-
-DECLARE_MODULE(sysvsem, sysvsem_mod,
- SI_SUB_SYSV_SEM, SI_ORDER_FIRST);
-MODULE_VERSION(sysvsem, 1);
-
-/*
- * Entry point for all SEM calls
- *
- * MPSAFE
- */
-int
-semsys(td, uap)
- struct thread *td;
- /* XXX actually varargs. */
- struct semsys_args /* {
- int which;
- int a2;
- int a3;
- int a4;
- int a5;
- } */ *uap;
-{
- int error;
-
- if (!jail_sysvipc_allowed && jailed(td->td_ucred))
- return (ENOSYS);
- if (uap->which < 0 ||
- uap->which >= sizeof(semcalls)/sizeof(semcalls[0]))
- return (EINVAL);
- error = (*semcalls[uap->which])(td, &uap->a2);
- return (error);
-}
-#endif /* __CYGWIN__ */
-
-/*
- * Allocate a new sem_undo structure for a process
- * (returns ptr to structure or NULL if no more room)
- */
-
-static struct sem_undo *
-semu_alloc(struct thread *td)
-{
- int i;
- struct sem_undo *suptr;
- struct sem_undo **supptr;
- int attempt;
-
- SEMUNDO_LOCKASSERT(MA_OWNED, td->td_proc->winpid);
- /*
- * Try twice to allocate something.
- * (we'll purge an empty structure after the first pass so
- * two passes are always enough)
- */
-
- for (attempt = 0; attempt < 2; attempt++) {
- /*
- * Look for a free structure.
- * Fill it in and return it if we find one.
- */
-
- for (i = 0; i < seminfo.semmnu; i++) {
- suptr = SEMU(i);
-#ifdef __CYGWIN__
- if (suptr->un_proc == 0) {
-#else
- if (suptr->un_proc == NULL) {
-#endif
- SLIST_INSERT_HEAD(&semu_list, suptr, un_next);
- suptr->un_cnt = 0;
- suptr->un_proc = td->td_proc->winpid;
- return(suptr);
- }
- }
-
- /*
- * We didn't find a free one, if this is the first attempt
- * then try to free a structure.
- */
-
- if (attempt == 0) {
- /* All the structures are in use - try to free one */
- int did_something = 0;
-
- SLIST_FOREACH_PREVPTR(suptr, supptr, &semu_list,
- un_next) {
- if (suptr->un_cnt == 0) {
-#ifdef __CYGWIN__
- suptr->un_proc = 0;
-#else
- suptr->un_proc = NULL;
-#endif
- did_something = 1;
- *supptr = SLIST_NEXT(suptr, un_next);
- break;
- }
- }
-
- /* If we didn't free anything then just give-up */
- if (!did_something)
- return(NULL);
- } else {
- /*
- * The second pass failed even though we freed
- * something after the first pass!
- * This is IMPOSSIBLE!
- */
- panic("semu_alloc - second attempt failed");
- }
- }
- return (NULL);
-}
-
-/*
- * Adjust a particular entry for a particular proc
- */
-
-static int
-semundo_adjust(struct thread *td, struct sem_undo **supptr, int semid,
- int semnum, int adjval)
-{
- struct proc *p = td->td_proc;
- struct sem_undo *suptr;
- struct undo *sunptr;
- int i;
-
- SEMUNDO_LOCKASSERT(MA_OWNED, td->td_proc->winpid);
- /* Look for and remember the sem_undo if the caller doesn't provide
- it */
-
- suptr = *supptr;
- if (suptr == NULL) {
- SLIST_FOREACH(suptr, &semu_list, un_next) {
-#ifdef __CYGWIN__
- if (suptr->un_proc == p->winpid) {
-#else
- if (suptr->un_proc == p) {
-#endif
- *supptr = suptr;
- break;
- }
- }
- if (suptr == NULL) {
- if (adjval == 0)
- return(0);
- suptr = semu_alloc(td);
- if (suptr == NULL)
- return(ENOSPC);
- *supptr = suptr;
- }
- }
-
- /*
- * Look for the requested entry and adjust it (delete if adjval becomes
- * 0).
- */
- sunptr = &suptr->un_ent[0];
- for (i = 0; i < suptr->un_cnt; i++, sunptr++) {
- if (sunptr->un_id != semid || sunptr->un_num != semnum)
- continue;
- if (adjval != 0) {
- adjval += sunptr->un_adjval;
- if (adjval > seminfo.semaem || adjval < -seminfo.semaem)
- return (ERANGE);
- }
- sunptr->un_adjval = adjval;
- if (sunptr->un_adjval == 0) {
- suptr->un_cnt--;
- if (i < suptr->un_cnt)
- suptr->un_ent[i] =
- suptr->un_ent[suptr->un_cnt];
- }
- return(0);
- }
-
- /* Didn't find the right entry - create it */
- if (adjval == 0)
- return(0);
- if (adjval > seminfo.semaem || adjval < -seminfo.semaem)
- return (ERANGE);
- if (suptr->un_cnt != seminfo.semume) {
- sunptr = &suptr->un_ent[suptr->un_cnt];
- suptr->un_cnt++;
- sunptr->un_adjval = adjval;
- sunptr->un_id = semid; sunptr->un_num = semnum;
- } else
- return(EINVAL);
- return(0);
-}
-
-static void
-semundo_clear(int semid, int semnum, struct thread *td)
-{
- struct sem_undo *suptr;
-
- SEMUNDO_LOCKASSERT(MA_OWNED, td->td_proc->winpid);
- SLIST_FOREACH(suptr, &semu_list, un_next) {
- struct undo *sunptr = &suptr->un_ent[0];
- int i = 0;
-
- while (i < suptr->un_cnt) {
- if (sunptr->un_id == semid) {
- if (semnum == -1 || sunptr->un_num == semnum) {
- suptr->un_cnt--;
- if (i < suptr->un_cnt) {
- suptr->un_ent[i] =
- suptr->un_ent[suptr->un_cnt];
- continue;
- }
- }
- if (semnum != -1)
- break;
- }
- i++, sunptr++;
- }
- }
-}
-
-static int
-semvalid(int semid, struct semid_ds *semaptr)
-{
-
- return ((semaptr->sem_perm.mode & SEM_ALLOC) == 0 ||
- semaptr->sem_perm.seq != IPCID_TO_SEQ(semid) ? EINVAL : 0);
-}
-
-/*
- * Note that the user-mode half of this passes a union, not a pointer
- */
-#ifndef _SYS_SYSPROTO_H_
-struct __semctl_args {
- int semid;
- int semnum;
- int cmd;
- union semun *arg;
-};
-#endif
-
-/*
- * MPSAFE
- */
-int
-__semctl(struct thread *td, struct __semctl_args *uap)
-{
- int semid = uap->semid;
- int semnum = uap->semnum;
- int cmd = uap->cmd;
- u_short *array;
- union semun *arg = uap->arg;
- union semun real_arg;
-#ifndef __CYGWIN__
- struct ucred *cred = td->td_ucred;
-#endif
- int i, rval, error;
- struct semid_ds sbuf;
- struct semid_ds *semaptr;
- struct mtx *sema_mtxp;
- u_short usval, count;
-
- DPRINTF(("call to semctl(%d, %d, %d, 0x%x)\n",
- semid, semnum, cmd, arg));
- if (!jail_sysvipc_allowed && jailed(td->td_ucred))
- return (ENOSYS);
-
- array = NULL;
-
- switch(cmd) {
-#ifdef __CYGWIN__
- case IPC_INFO:
- if ((error = copyin(arg, &real_arg, sizeof(real_arg))) != 0)
- return (error);
- if (!semid) {
- error = copyout(&seminfo, real_arg.buf,
- sizeof(struct seminfo));
- td->td_retval[0] = error ? -1 : 0;
- return (error);
- }
- if (semid > seminfo.semmni)
- semid = seminfo.semmni;
- error = copyout(sema, real_arg.buf,
- semid * sizeof(struct semid_ds));
- td->td_retval[0] = error ? -1 : 0;
- return (error);
- case SEM_INFO:
- if (!(error = copyin(arg, &real_arg, sizeof(real_arg)))) {
- struct sem_info sem_info;
- sem_info.sem_ids = semtots;
- sem_info.sem_num = semtot;
- error = copyout(&sem_info, real_arg.buf,
- sizeof(struct sem_info));
- }
- td->td_retval[0] = error ? -1 : 0;
- return (error);
-
-#endif /* __CYGWIN__ */
- case SEM_STAT:
- if (semid < 0 || semid >= seminfo.semmni)
- return (EINVAL);
- if ((error = copyin(arg, &real_arg, sizeof(real_arg))) != 0)
- return (error);
- semaptr = &sema[semid];
- sema_mtxp = &sema_mtx[semid];
- mtx_lock(sema_mtxp);
- if ((semaptr->sem_perm.mode & SEM_ALLOC) == 0) {
- error = EINVAL;
- goto done2;
- }
- if ((error = ipcperm(td, &semaptr->sem_perm, IPC_R)))
- goto done2;
- mtx_unlock(sema_mtxp);
- error = copyout(semaptr, real_arg.buf, sizeof(struct semid_ds));
- rval = IXSEQ_TO_IPCID(semid,semaptr->sem_perm);
- if (error == 0)
- td->td_retval[0] = rval;
- return (error);
- }
-
- semid = IPCID_TO_IX(semid);
- if (semid < 0 || semid >= seminfo.semmni)
- return (EINVAL);
-
- semaptr = &sema[semid];
- sema_mtxp = &sema_mtx[semid];
-
- error = 0;
- rval = 0;
-
- switch (cmd) {
- case IPC_RMID:
- mtx_lock(sema_mtxp);
- if ((error = semvalid(uap->semid, semaptr)) != 0)
- goto done2;
- if ((error = ipcperm(td, &semaptr->sem_perm, IPC_M)))
- goto done2;
-#ifdef __CYGWIN__
- semaptr->sem_perm.cuid = td->ipcblk->uid;
- semaptr->sem_perm.uid = td->ipcblk->uid;
-#else
- semaptr->sem_perm.cuid = cred->cr_uid;
- semaptr->sem_perm.uid = cred->cr_uid;
-#endif
- semtot -= semaptr->sem_nsems;
- semtots--;
- for (i = semaptr->sem_base - sem; i < semtot; i++)
- sem[i] = sem[i + semaptr->sem_nsems];
- for (i = 0; i < seminfo.semmni; i++) {
- if ((sema[i].sem_perm.mode & SEM_ALLOC) &&
- sema[i].sem_base > semaptr->sem_base)
- sema[i].sem_base -= semaptr->sem_nsems;
- }
- semaptr->sem_perm.mode = 0;
- SEMUNDO_LOCK();
- semundo_clear(semid, -1, td);
- SEMUNDO_UNLOCK();
- wakeup(semaptr);
- break;
-
- case IPC_SET:
- if ((error = copyin(arg, &real_arg, sizeof(real_arg))) != 0)
- goto done2;
- if ((error = copyin(real_arg.buf, &sbuf, sizeof(sbuf))) != 0)
- goto done2;
- mtx_lock(sema_mtxp);
- if ((error = semvalid(uap->semid, semaptr)) != 0)
- goto done2;
- if ((error = ipcperm(td, &semaptr->sem_perm, IPC_M)))
- goto done2;
- semaptr->sem_perm.uid = sbuf.sem_perm.uid;
- semaptr->sem_perm.gid = sbuf.sem_perm.gid;
- semaptr->sem_perm.mode = (semaptr->sem_perm.mode & ~0777) |
- (sbuf.sem_perm.mode & 0777);
- semaptr->sem_ctime = time (NULL);
- break;
-
- case IPC_STAT:
- if ((error = copyin(arg, &real_arg, sizeof(real_arg))) != 0)
- goto done2;
- mtx_lock(sema_mtxp);
- if ((error = semvalid(uap->semid, semaptr)) != 0)
- goto done2;
- if ((error = ipcperm(td, &semaptr->sem_perm, IPC_R)))
- goto done2;
- sbuf = *semaptr;
- mtx_unlock(sema_mtxp);
- error = copyout(semaptr, real_arg.buf,
- sizeof(struct semid_ds));
- break;
-
- case GETNCNT:
- mtx_lock(sema_mtxp);
- if ((error = semvalid(uap->semid, semaptr)) != 0)
- goto done2;
- if ((error = ipcperm(td, &semaptr->sem_perm, IPC_R)))
- goto done2;
- if (semnum < 0 || semnum >= semaptr->sem_nsems) {
- error = EINVAL;
- goto done2;
- }
- rval = semaptr->sem_base[semnum].semncnt;
- break;
-
- case GETPID:
- mtx_lock(sema_mtxp);
- if ((error = semvalid(uap->semid, semaptr)) != 0)
- goto done2;
- if ((error = ipcperm(td, &semaptr->sem_perm, IPC_R)))
- goto done2;
- if (semnum < 0 || semnum >= semaptr->sem_nsems) {
- error = EINVAL;
- goto done2;
- }
- rval = semaptr->sem_base[semnum].sempid;
- break;
-
- case GETVAL:
- mtx_lock(sema_mtxp);
- if ((error = semvalid(uap->semid, semaptr)) != 0)
- goto done2;
- if ((error = ipcperm(td, &semaptr->sem_perm, IPC_R)))
- goto done2;
- if (semnum < 0 || semnum >= semaptr->sem_nsems) {
- error = EINVAL;
- goto done2;
- }
- rval = semaptr->sem_base[semnum].semval;
- break;
-
- case GETALL:
- if ((error = copyin(arg, &real_arg, sizeof(real_arg))) != 0)
- goto done2;
- array = (u_short *) sys_malloc(sizeof(*array) * semaptr->sem_nsems, M_TEMP,
- M_WAITOK);
- mtx_lock(sema_mtxp);
- if ((error = semvalid(uap->semid, semaptr)) != 0)
- goto done2;
- if ((error = ipcperm(td, &semaptr->sem_perm, IPC_R)))
- goto done2;
- for (i = 0; i < semaptr->sem_nsems; i++)
- array[i] = semaptr->sem_base[i].semval;
- mtx_unlock(sema_mtxp);
- error = copyout(array, real_arg.array,
- i * sizeof(real_arg.array[0]));
- break;
-
- case GETZCNT:
- mtx_lock(sema_mtxp);
- if ((error = semvalid(uap->semid, semaptr)) != 0)
- goto done2;
- if ((error = ipcperm(td, &semaptr->sem_perm, IPC_R)))
- goto done2;
- if (semnum < 0 || semnum >= semaptr->sem_nsems) {
- error = EINVAL;
- goto done2;
- }
- rval = semaptr->sem_base[semnum].semzcnt;
- break;
-
- case SETVAL:
- if ((error = copyin(arg, &real_arg, sizeof(real_arg))) != 0)
- goto done2;
- mtx_lock(sema_mtxp);
- if ((error = semvalid(uap->semid, semaptr)) != 0)
- goto done2;
- if ((error = ipcperm(td, &semaptr->sem_perm, IPC_W)))
- goto done2;
- if (semnum < 0 || semnum >= semaptr->sem_nsems) {
- error = EINVAL;
- goto done2;
- }
- if (real_arg.val < 0 || real_arg.val > seminfo.semvmx) {
- error = ERANGE;
- goto done2;
- }
- semaptr->sem_base[semnum].semval = real_arg.val;
- SEMUNDO_LOCK();
- semundo_clear(semid, semnum, td);
- SEMUNDO_UNLOCK();
- wakeup(semaptr);
- break;
-
- case SETALL:
- mtx_lock(sema_mtxp);
-raced:
- if ((error = semvalid(uap->semid, semaptr)) != 0)
- goto done2;
- count = semaptr->sem_nsems;
- mtx_unlock(sema_mtxp);
- if ((error = copyin(arg, &real_arg, sizeof(real_arg))) != 0)
- goto done2;
- array = (u_short *) sys_malloc(sizeof(*array) * count, M_TEMP, M_WAITOK);
- error = copyin(real_arg.array, array, count * sizeof(*array));
- if (error)
- break;
- mtx_lock(sema_mtxp);
- if ((error = semvalid(uap->semid, semaptr)) != 0)
- goto done2;
- /* we could have raced? */
- if (count != semaptr->sem_nsems) {
- sys_free(array, M_TEMP);
- array = NULL;
- goto raced;
- }
- if ((error = ipcperm(td, &semaptr->sem_perm, IPC_W)))
- goto done2;
- for (i = 0; i < semaptr->sem_nsems; i++) {
- usval = array[i];
- if (usval > seminfo.semvmx) {
- error = ERANGE;
- break;
- }
- semaptr->sem_base[i].semval = usval;
- }
- SEMUNDO_LOCK();
- semundo_clear(semid, -1, td);
- SEMUNDO_UNLOCK();
- wakeup(semaptr);
- break;
-
- default:
- error = EINVAL;
- break;
- }
-
- if (error == 0)
- td->td_retval[0] = rval;
-done2:
- if (mtx_owned(sema_mtxp, td->td_proc->winpid))
- mtx_unlock(sema_mtxp);
- if (array != NULL)
- sys_free(array, M_TEMP);
- return(error);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct semget_args {
- key_t key;
- int nsems;
- int semflg;
-};
-#endif
-
-/*
- * MPSAFE
- */
-int
-semget(struct thread *td, struct semget_args *uap)
-{
- int semid, error = 0;
- key_t key = uap->key;
- int nsems = uap->nsems;
- int semflg = uap->semflg;
-#ifndef __CYGWIN__
- struct ucred *cred = td->td_ucred;
-#endif
-
- DPRINTF(("semget(0x%X, %d, 0%o)\n", key, nsems, semflg));
- if (!jail_sysvipc_allowed && jailed(td->td_ucred))
- return (ENOSYS);
-
- mtx_lock(&Giant);
- if (key != IPC_PRIVATE) {
- for (semid = 0; semid < seminfo.semmni; semid++) {
- if ((sema[semid].sem_perm.mode & SEM_ALLOC) &&
- sema[semid].sem_perm.key == key)
- break;
- }
- if (semid < seminfo.semmni) {
- DPRINTF(("found public key\n"));
- if ((error = ipcperm(td, &sema[semid].sem_perm,
- semflg & 0700))) {
- goto done2;
- }
- if (nsems > 0 && sema[semid].sem_nsems < nsems) {
- DPRINTF(("too small\n"));
- error = EINVAL;
- goto done2;
- }
- if ((semflg & IPC_CREAT) && (semflg & IPC_EXCL)) {
- DPRINTF(("not exclusive\n"));
- error = EEXIST;
- goto done2;
- }
- goto found;
- }
- }
-
- DPRINTF(("need to allocate the semid_ds\n"));
- if (key == IPC_PRIVATE || (semflg & IPC_CREAT)) {
- if (nsems <= 0 || nsems > seminfo.semmsl) {
- DPRINTF(("nsems out of range (0<%d<=%d)\n", nsems,
- seminfo.semmsl));
- error = EINVAL;
- goto done2;
- }
- if (nsems > seminfo.semmns - semtot) {
- DPRINTF((
- "not enough semaphores left (need %d, got %d)\n",
- nsems, seminfo.semmns - semtot));
- error = ENOSPC;
- goto done2;
- }
- for (semid = 0; semid < seminfo.semmni; semid++) {
- if ((sema[semid].sem_perm.mode & SEM_ALLOC) == 0)
- break;
- }
- if (semid == seminfo.semmni) {
- DPRINTF(("no more semid_ds's available\n"));
- error = ENOSPC;
- goto done2;
- }
- DPRINTF(("semid %d is available\n", semid));
- sema[semid].sem_perm.key = key;
-#ifdef __CYGWIN__
- sema[semid].sem_perm.cuid = td->ipcblk->uid;
- sema[semid].sem_perm.uid = td->ipcblk->uid;
- sema[semid].sem_perm.cgid = td->ipcblk->gid;
- sema[semid].sem_perm.gid = td->ipcblk->gid;
-#else
- sema[semid].sem_perm.cuid = cred->cr_uid;
- sema[semid].sem_perm.uid = cred->cr_uid;
- sema[semid].sem_perm.cgid = cred->cr_gid;
- sema[semid].sem_perm.gid = cred->cr_gid;
-#endif
- sema[semid].sem_perm.mode = (semflg & 0777) | SEM_ALLOC;
- sema[semid].sem_perm.seq =
- (sema[semid].sem_perm.seq + 1) & 0x7fff;
- sema[semid].sem_nsems = nsems;
- sema[semid].sem_otime = 0;
- sema[semid].sem_ctime = time (NULL);
- sema[semid].sem_base = &sem[semtot];
- semtot += nsems;
- semtots++;
- bzero(sema[semid].sem_base,
- sizeof(sema[semid].sem_base[0])*nsems);
- DPRINTF(("sembase = 0x%x, next = 0x%x\n", sema[semid].sem_base,
- &sem[semtot]));
- } else {
- DPRINTF(("didn't find it and wasn't asked to create it\n"));
- error = ENOENT;
- goto done2;
- }
-
-found:
- td->td_retval[0] = IXSEQ_TO_IPCID(semid, sema[semid].sem_perm);
-done2:
-#ifdef __CYGWIN__
- if (!error)
- ipcexit_creat_hookthread (td);
-#endif
- mtx_unlock(&Giant);
- return (error);
-}
-
-#ifndef _SYS_SYSPROTO_H_
-struct semop_args {
- int semid;
- struct sembuf *sops;
- size_t nsops;
-};
-#endif
-
-/*
- * MPSAFE
- */
-int
-semop(struct thread *td, struct semop_args *uap)
-{
-#define SMALL_SOPS 8
- struct sembuf small_sops[SMALL_SOPS];
- int semid = uap->semid;
- size_t nsops = uap->nsops;
- struct sembuf *sops;
- struct semid_ds *semaptr;
- struct sembuf *sopptr = 0;
- struct sem *semptr = 0;
- struct sem_undo *suptr;
- struct mtx *sema_mtxp;
- size_t i, j, k;
- int error;
- int do_wakeup, do_undos;
-
- DPRINTF(("call to semop(%d, 0x%x, %u)\n", semid, uap->sops, nsops));
-
- if (!jail_sysvipc_allowed && jailed(td->td_ucred))
- return (ENOSYS);
-
- semid = IPCID_TO_IX(semid); /* Convert back to zero origin */
-
- if (semid < 0 || semid >= seminfo.semmni)
- return (EINVAL);
-
- /* Allocate memory for sem_ops */
- if (nsops <= SMALL_SOPS)
- sops = small_sops;
- else if (nsops <= (unsigned long) seminfo.semopm)
- sops = (struct sembuf *) sys_malloc(nsops * sizeof(*sops), M_SEM, M_WAITOK);
- else {
- DPRINTF(("too many sops (max=%d, nsops=%d)\n", seminfo.semopm,
- nsops));
- return (E2BIG);
- }
- if ((error = copyin(uap->sops, sops, nsops * sizeof(sops[0]))) != 0) {
- DPRINTF(("error = %d from copyin(%08x, %08x, %d)\n", error,
- uap->sops, sops, nsops * sizeof(sops[0])));
- if (sops != small_sops)
- sys_free(sops, M_SEM);
- return (error);
- }
-
- semaptr = &sema[semid];
- sema_mtxp = &sema_mtx[semid];
- mtx_lock(sema_mtxp);
- if ((semaptr->sem_perm.mode & SEM_ALLOC) == 0) {
- error = EINVAL;
- goto done2;
- }
- if (semaptr->sem_perm.seq != IPCID_TO_SEQ(uap->semid)) {
- error = EINVAL;
- goto done2;
- }
- /*
- * Initial pass thru sops to see what permissions are needed.
- * Also perform any checks that don't need repeating on each
- * attempt to satisfy the request vector.
- */
- j = 0; /* permission needed */
- do_undos = 0;
- for (i = 0; i < nsops; i++) {
- sopptr = &sops[i];
- if (sopptr->sem_num >= semaptr->sem_nsems) {
- error = EFBIG;
- goto done2;
- }
- if (sopptr->sem_flg & SEM_UNDO && sopptr->sem_op != 0)
- do_undos = 1;
- j |= (sopptr->sem_op == 0) ? SEM_R : SEM_A;
- }
-
- if ((error = ipcperm(td, &semaptr->sem_perm, j))) {
- DPRINTF(("error = %d from ipaccess\n", error));
- goto done2;
- }
-
- /*
- * Loop trying to satisfy the vector of requests.
- * If we reach a point where we must wait, any requests already
- * performed are rolled back and we go to sleep until some other
- * process wakes us up. At this point, we start all over again.
- *
- * This ensures that from the perspective of other tasks, a set
- * of requests is atomic (never partially satisfied).
- */
- for (;;) {
- do_wakeup = 0;
- error = 0; /* error return if necessary */
-
- for (i = 0; i < nsops; i++) {
- sopptr = &sops[i];
- semptr = &semaptr->sem_base[sopptr->sem_num];
-
- DPRINTF((
- "semop: semaptr=%x, sem_base=%x, "
- "semptr=%x, sem[%d]=%d : op=%d, flag=%s\n",
- semaptr, semaptr->sem_base, semptr,
- sopptr->sem_num, semptr->semval, sopptr->sem_op,
- (sopptr->sem_flg & IPC_NOWAIT) ?
- "nowait" : "wait"));
-
- if (sopptr->sem_op < 0) {
- if (semptr->semval + sopptr->sem_op < 0) {
- DPRINTF(("semop: can't do it now\n"));
- break;
- } else {
- semptr->semval += sopptr->sem_op;
- if (semptr->semval == 0 &&
- semptr->semzcnt > 0)
- do_wakeup = 1;
- }
- } else if (sopptr->sem_op == 0) {
- if (semptr->semval != 0) {
- DPRINTF(("semop: not zero now\n"));
- break;
- }
- } else if (semptr->semval + sopptr->sem_op >
- seminfo.semvmx) {
- error = ERANGE;
- break;
- } else {
- if (semptr->semncnt > 0)
- do_wakeup = 1;
- semptr->semval += sopptr->sem_op;
- }
- }
-
- /*
- * Did we get through the entire vector?
- */
- if (i >= nsops)
- goto done;
-
- /*
- * No ... rollback anything that we've already done
- */
- DPRINTF(("semop: rollback 0 through %d\n", i-1));
- for (j = 0; j < i; j++)
- semaptr->sem_base[sops[j].sem_num].semval -=
- sops[j].sem_op;
-
- /* If we detected an error, return it */
- if (error != 0)
- goto done2;
-
- /*
- * If the request that we couldn't satisfy has the
- * NOWAIT flag set then return with EAGAIN.
- */
- if (sopptr->sem_flg & IPC_NOWAIT) {
- error = EAGAIN;
- goto done2;
- }
-
- if (sopptr->sem_op == 0)
- semptr->semzcnt++;
- else
- semptr->semncnt++;
-
- DPRINTF(("semop: good night!\n"));
- error = msleep(semaptr, sema_mtxp, (PZERO - 4) | PCATCH,
- "semwait", 0);
- DPRINTF(("semop: good morning (error=%d)!\n", error));
- /* return code is checked below, after sem[nz]cnt-- */
-
- /*
- * Make sure that the semaphore still exists
- */
- if ((semaptr->sem_perm.mode & SEM_ALLOC) == 0 ||
- semaptr->sem_perm.seq != IPCID_TO_SEQ(uap->semid)) {
- error = EIDRM;
- goto done2;
- }
-
- /*
- * The semaphore is still alive. Readjust the count of
- * waiting processes.
- */
- if (sopptr->sem_op == 0)
- semptr->semzcnt--;
- else
- semptr->semncnt--;
-
- /*
- * Is it really morning, or was our sleep interrupted?
- * (Delayed check of msleep() return code because we
- * need to decrement sem[nz]cnt either way.)
- */
- if (error != 0) {
-#ifdef __CYGWIN__
- if (error != EIDRM)
-#endif /* __CYGWIN__ */
- error = EINTR;
- goto done2;
- }
- DPRINTF(("semop: good morning!\n"));
- }
-
-done:
- /*
- * Process any SEM_UNDO requests.
- */
- if (do_undos) {
- SEMUNDO_LOCK();
- suptr = NULL;
- for (i = 0; i < nsops; i++) {
- /*
- * We only need to deal with SEM_UNDO's for non-zero
- * op's.
- */
- int adjval;
-
- if ((sops[i].sem_flg & SEM_UNDO) == 0)
- continue;
- adjval = sops[i].sem_op;
- if (adjval == 0)
- continue;
- error = semundo_adjust(td, &suptr, semid,
- sops[i].sem_num, -adjval);
- if (error == 0)
- continue;
-
- /*
- * Oh-Oh! We ran out of either sem_undo's or undo's.
- * Rollback the adjustments to this point and then
- * rollback the semaphore ups and down so we can return
- * with an error with all structures restored. We
- * rollback the undo's in the exact reverse order that
- * we applied them. This guarantees that we won't run
- * out of space as we roll things back out.
- */
- for (j = 0; j < i; j++) {
- k = i - j - 1;
- if ((sops[k].sem_flg & SEM_UNDO) == 0)
- continue;
- adjval = sops[k].sem_op;
- if (adjval == 0)
- continue;
- if (semundo_adjust(td, &suptr, semid,
- sops[k].sem_num, adjval) != 0)
- panic("semop - can't undo undos");
- }
-
- for (j = 0; j < nsops; j++)
- semaptr->sem_base[sops[j].sem_num].semval -=
- sops[j].sem_op;
-
- DPRINTF(("error = %d from semundo_adjust\n", error));
- SEMUNDO_UNLOCK();
- goto done2;
- } /* loop through the sops */
- SEMUNDO_UNLOCK();
- } /* if (do_undos) */
-
- /* We're definitely done - set the sempid's and time */
- for (i = 0; i < nsops; i++) {
- sopptr = &sops[i];
- semptr = &semaptr->sem_base[sopptr->sem_num];
- semptr->sempid = td->td_proc->p_pid;
- }
- semaptr->sem_otime = time (NULL);
-
- /*
- * Do a wakeup if any semaphore was up'd whilst something was
- * sleeping on it.
- */
- if (do_wakeup) {
- DPRINTF(("semop: doing wakeup\n"));
- wakeup(semaptr);
- DPRINTF(("semop: back from wakeup\n"));
- }
- DPRINTF(("semop: done\n"));
- td->td_retval[0] = 0;
-done2:
- mtx_unlock(sema_mtxp);
- if (sops != small_sops)
- sys_free(sops, M_SEM);
- return (error);
-}
-
-/*
- * Go through the undo structures for this process and apply the adjustments to
- * semaphores.
- */
-void
-semexit_myhook(void *arg, struct proc *p)
-{
- struct sem_undo *suptr;
- struct sem_undo **supptr;
-
- /*
- * Go through the chain of undo vectors looking for one
- * associated with this process.
- */
- SEMUNDO_HOOKLOCK();
- SLIST_FOREACH_PREVPTR(suptr, supptr, &semu_list, un_next) {
-#ifdef __CYGWIN__
- if (suptr->un_proc == p->winpid)
-#else
- if (suptr->un_proc == p)
-#endif
- break;
- }
-#ifndef __CYGWIN__
- SEMUNDO_UNLOCK();
-#endif
-
- if (suptr == NULL) {
- SEMUNDO_UNLOCK();
- return;
- }
-
-#ifdef __CYGWIN__
- DPRINTF(("proc @%u(%u) has undo structure with %d entries\n",
- p->cygpid, p->winpid, suptr->un_cnt));
-#else
- DPRINTF(("proc @%08x has undo structure with %d entries\n", p,
- suptr->un_cnt));
-#endif
-
- /*
- * If there are any active undo elements then process them.
- */
- if (suptr->un_cnt > 0) {
- int ix;
-
- for (ix = 0; ix < suptr->un_cnt; ix++) {
- int semid = suptr->un_ent[ix].un_id;
- int semnum = suptr->un_ent[ix].un_num;
- int adjval = suptr->un_ent[ix].un_adjval;
- struct semid_ds *semaptr;
- struct mtx *sema_mtxp;
-
- semaptr = &sema[semid];
- sema_mtxp = &sema_mtx[semid];
-#ifdef __CYGWIN__
- _mtx_lock(sema_mtxp, p->winpid, __FILE__, __LINE__);
-#else
- mtx_lock(sema_mtxp);
- SEMUNDO_HOOKLOCK();
-#endif
- if ((semaptr->sem_perm.mode & SEM_ALLOC) == 0)
- panic("semexit - semid not allocated");
- if (semnum >= semaptr->sem_nsems)
- panic("semexit - semnum out of range");
-
- DPRINTF((
-#ifdef __CYGWIN__
- "semexit: %u id=%d num=%d(adj=%d) ; sem=%d\n",
-#else
- "semexit: %08x id=%d num=%d(adj=%d) ; sem=%d\n",
-#endif
- suptr->un_proc, suptr->un_ent[ix].un_id,
- suptr->un_ent[ix].un_num,
- suptr->un_ent[ix].un_adjval,
- semaptr->sem_base[semnum].semval));
-
- if (adjval < 0) {
- if (semaptr->sem_base[semnum].semval < -adjval)
- semaptr->sem_base[semnum].semval = 0;
- else
- semaptr->sem_base[semnum].semval +=
- adjval;
- } else
- semaptr->sem_base[semnum].semval += adjval;
-
- wakeup(semaptr);
- DPRINTF(("semexit: back from wakeup\n"));
- _mtx_unlock(sema_mtxp, __FILE__, __LINE__);
-#ifndef __CYGWIN__
- SEMUNDO_UNLOCK();
-#endif
- }
- }
-
- /*
- * Deallocate the undo vector.
- */
- DPRINTF(("removing vector (%u)\n", suptr->un_proc));
-#ifdef __CYGWIN__
- suptr->un_proc = 0;
-#else
- suptr->un_proc = NULL;
-#endif
- *supptr = SLIST_NEXT(suptr, un_next);
-#ifdef __CYGWIN__
- SEMUNDO_UNLOCK();
-#endif
-}
-
-#ifndef __CYGWIN__
-static int
-sysctl_sema(SYSCTL_HANDLER_ARGS)
-{
-
- return (SYSCTL_OUT(req, sema,
- sizeof(struct semid_ds) * seminfo.semmni));
-}
-#endif /* __CYGWIN__ */
-#endif /* __OUTSIDE_CYGWIN__ */
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-26 15:50:54 +0300