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/* Copyright (C) 2002, 2003, 2005, 2007, 2008 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 <pthread-errnos.h>
#include <structsem.h>
#include <lowlevellock.h>
.text
.globl sem_post
.type sem_post,@function
.align 16
sem_post:
cfi_startproc
pushl %ebx
cfi_adjust_cfa_offset(4)
cfi_offset(%ebx, -8)
movl 8(%esp), %ebx
#if VALUE == 0
movl (%ebx), %eax
#else
movl VALUE(%ebx), %eax
#endif
0: cmpl $SEM_VALUE_MAX, %eax
je 3f
leal 1(%eax), %edx
LOCK
#if VALUE == 0
cmpxchgl %edx, (%ebx)
#else
cmpxchgl %edx, VALUE(%ebx)
#endif
jnz 0b
cmpl $0, NWAITERS(%ebx)
je 2f
movl $FUTEX_WAKE, %ecx
orl PRIVATE(%ebx), %ecx
movl $1, %edx
movl $SYS_futex, %eax
ENTER_KERNEL
testl %eax, %eax
js 1f
2: xorl %eax, %eax
popl %ebx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebx)
ret
cfi_adjust_cfa_offset(4)
cfi_offset(%ebx, -8)
1:
#ifdef __PIC__
call __x86.get_pc_thunk.bx
#else
movl $4f, %ebx
4:
#endif
addl $_GLOBAL_OFFSET_TABLE_, %ebx
#if USE___THREAD
# ifdef NO_TLS_DIRECT_SEG_REFS
movl errno@gotntpoff(%ebx), %edx
addl %gs:0, %edx
movl $EINVAL, (%edx)
# else
movl errno@gotntpoff(%ebx), %edx
movl $EINVAL, %gs:(%edx)
# endif
#else
call __errno_location@plt
movl $EINVAL, (%eax)
#endif
orl $-1, %eax
popl %ebx
ret
3:
#ifdef __PIC__
call __x86.get_pc_thunk.bx
#else
movl $5f, %ebx
5:
#endif
addl $_GLOBAL_OFFSET_TABLE_, %ebx
#if USE___THREAD
# ifdef NO_TLS_DIRECT_SEG_REFS
movl errno@gotntpoff(%ebx), %edx
addl %gs:0, %edx
movl $EOVERFLOW, (%edx)
# else
movl errno@gotntpoff(%ebx), %edx
movl $EOVERFLOW, %gs:(%edx)
# endif
#else
call __errno_location@plt
movl $EOVERFLOW, (%eax)
#endif
orl $-1, %eax
popl %ebx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebx)
ret
cfi_endproc
.size sem_post,.-sem_post
#ifdef __PIC__
.section .gnu.linkonce.t.__x86.get_pc_thunk.bx,"ax",@progbits
.globl __x86.get_pc_thunk.bx
.hidden __x86.get_pc_thunk.bx
.type __x86.get_pc_thunk.bx,@function
__x86.get_pc_thunk.bx:
movl (%esp), %ebx;
ret
.size __x86.get_pc_thunk.bx,.-__x86.get_pc_thunk.bx
#endif
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