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/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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>
#include <shlib-compat.h>
#include <pthread-errnos.h>
#ifndef UP
# define LOCK lock
#else
# define
#endif
#define SYS_futex 240
#define FUTEX_WAKE 1
.text
.globl __new_sem_wait
.type __new_sem_wait,@function
.align 16
__new_sem_wait:
pushl %ebx
pushl %esi
movl 12(%esp), %ebx
3: movl (%ebx), %eax
2: testl %eax, %eax
je,pn 1f
leal -1(%eax), %edx
LOCK
cmpxchgl %edx, (%ebx)
jne,pn 2b
xorl %eax, %eax
popl %esi
popl %ebx
ret
1: xorl %esi, %esi
movl $SYS_futex, %eax
movl %esi, %ecx
movl %esi, %edx
ENTER_KERNEL
testl %eax, %eax
je 3b
cmpl $-EWOULDBLOCK, %eax
je 3b
negl %eax
#ifdef PIC
call __i686.get_pc_thunk.bx
#else
movl $4f, %ebx
4:
#endif
addl $_GLOBAL_OFFSET_TABLE_, %ebx
#if USE___THREAD
movl %gs:0, %edx
subl errno@gottpoff(%ebx), %edx
movl %eax, (%edx)
#else
movl %eax, %edx
call __errno_location@plt
movl %edx, (%eax)
#endif
orl $-1, %eax
popl %esi
popl %ebx
ret
.size __new_sem_wait,.-__new_sem_wait
versioned_symbol(libpthread, __new_sem_wait, sem_wait, GLIBC_2_1)
#if SHLIB_COMPAT(libpthread, GLIBC_2_0, GLIBC_2_1)
.global __old_sem_wait
__old_sem_wait = __new_sem_wait
compat_symbol(libpthread, __old_sem_wait, sem_wait, GLIBC_2_0)
#endif
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