Welcome to mirror list, hosted at ThFree Co, Russian Federation.

cygwin.com/git/newlib-cygwin.git - Unnamed repository; edit this file 'description' to name the repository.
summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
Diffstat (limited to 'newlib/libc/sys/linux/linuxthreads/machine/i386/pt-machine.h')
-rw-r--r--newlib/libc/sys/linux/linuxthreads/machine/i386/pt-machine.h98
1 files changed, 0 insertions, 98 deletions
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;
-}