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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 <lowlevelcond.h>
#ifdef UP
# define LOCK
#else
# define LOCK lock
#endif
#define SYS_gettimeofday __NR_gettimeofday
#define SYS_futex 240
#define FUTEX_WAIT 0
#define FUTEX_WAKE 1
#define ETIMEDOUT 110
.text
/* int pthread_cond_timedwait (pthread_cond_t *cond, pthread_mutex_t *mutex,
const struct timespec *abstime) */
.globl __pthread_cond_timedwait
.type __pthread_cond_timedwait, @function
.align 16
__pthread_cond_timedwait:
pushl %ebp
pushl %edi
pushl %esi
pushl %ebx
movl 20(%esp), %ebx
movl 28(%esp), %ebp
/* Get internal lock. */
movl $1, %eax
LOCK
#if cond_lock == 0
xaddl %eax, (%ebx)
#else
xaddl %eax, cond_lock(%ebx)
#endif
testl %eax, %eax
jne 1f
/* Unlock the mutex. */
2: pushl 24(%esp)
call __pthread_mutex_unlock_internal
testl %eax, %eax
jne 16f
addl $1, total_seq(%ebx)
adcl $0, total_seq+4(%ebx)
/* Install cancellation handler. */
#ifdef PIC
call __i686.get_pc_thunk.cx
addl $_GLOBAL_OFFSET_TABLE_, %ecx
leal __condvar_cleanup@GOTOFF(%ecx), %eax
#else
leal __condvar_cleanup, %eax
#endif
subl $40, %esp
leal 28(%esp), %edx
movl %esp, 8(%esp)
movl %eax, 4(%esp)
movl %edx, (%esp)
call __pthread_cleanup_push
/* Address of the mutex. */
movl 68(%esp), %ecx
/* Get and store current wakeup_seq value. */
movl wakeup_seq(%ebx), %edi
movl wakeup_seq+4(%ebx), %edx
movl %edi, 20(%esp)
movl %edx, 24(%esp)
/* Prepare structure passed to cancellation handler. */
movl %ebx, 4(%esp)
movl %ecx, 8(%esp)
/* Unlock. */
8: LOCK
#if cond_lock == 0
subl $1, (%ebx)
#else
subl $1, cond_lock(%ebx)
#endif
jne 3f
4: movl %esp, %eax
call __pthread_enable_asynccancel_2
/* Get the current time. */
movl %ebx, %edx
leal 12(%esp), %ebx
xorl %ecx, %ecx
movl $SYS_gettimeofday, %eax
ENTER_KERNEL
movl %edx, %ebx
/* Compute relative timeout. */
movl 16(%esp), %eax
movl $1000, %edx
mul %edx /* Milli seconds to nano seconds. */
movl (%ebp), %ecx
movl 4(%ebp), %edx
subl 12(%esp), %ecx
subl %eax, %edx
jns 12f
addl $1000000000, %edx
subl $1, %ecx
12: testl %ecx, %ecx
js 13f
/* Store relative timeout. */
movl %ecx, 12(%esp)
movl %edx, 16(%esp)
leal 12(%esp), %esi
xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */
movl %edi, %edx
addl $wakeup_seq, %ebx
movl $SYS_futex, %eax
ENTER_KERNEL
subl $wakeup_seq, %ebx
movl %eax, %esi
movl (%esp), %eax
call __pthread_disable_asynccancel
/* Lock. */
movl $1, %eax
LOCK
#if cond_lock == 0
xaddl %eax, (%ebx)
#else
xaddl %eax, cond_lock(%ebx)
#endif
testl %eax, %eax
jne 5f
6: movl woken_seq(%ebx), %eax
movl woken_seq+4(%ebx), %ecx
movl wakeup_seq(%ebx), %edi
movl wakeup_seq+4(%ebx), %edx
cmpl 24(%esp), %ecx
ja 7f
jb 15f
cmpl 20(%esp), %eax
jb 15f
7: cmpl %ecx, %edx
ja 9f
jb 15f
cmp %eax, %edi
ja 9f
15: cmpl $-ETIMEDOUT, %esi
jne 8b
13: addl $1, wakeup_seq(%ebx)
adcl $0, wakeup_seq+4(%ebx)
movl $ETIMEDOUT, %esi
jmp 14f
9: xorl %esi, %esi
14: addl $1, woken_seq(%ebx)
adcl $0, woken_seq+4(%ebx)
LOCK
#if cond_lock == 0
subl $1, (%ebx)
#else
subl $1, cond_lock(%ebx)
#endif
jne 10f
/* Remove cancellation handler. */
11: movl 20+CLEANUP_PREV(%esp), %edx
movl %edx, %gs:CLEANUP
/* Trick ahead: 8(%esp) contains the address of the mutex. */
addl $8, %esp
call __pthread_mutex_lock_internal
addl $36, %esp
/* We return the result of the mutex_lock operation if it failed. */
testl %eax, %eax
cmovel %esi, %eax
18: popl %ebx
popl %esi
popl %edi
popl %ebp
ret
/* Initial locking failed. */
1:
#if cond_lock == 0
movl %ebx, %ecx
#else
leal cond_lock(%ebx), %ecx
#endif
call __lll_mutex_lock_wait
jmp 2b
/* Unlock in loop requires waekup. */
3:
#if cond_lock == 0
movl %ebx, %eax
#else
leal cond_lock(%ebx), %eax
#endif
call __lll_mutex_unlock_wake
jmp 4b
/* Locking in loop failed. */
5:
#if cond_lock == 0
movl %ebx, %ecx
#else
leal cond_lock(%ebx), %ecx
#endif
call __lll_mutex_lock_wait
jmp 6b
/* Unlock after loop requires waekup. */
10:
#if cond_lock == 0
movl %ebx, %eax
#else
leal cond_lock(%ebx), %eax
#endif
call __lll_mutex_unlock_wake
jmp 11b
/* The initial unlocking of the mutex failed. */
16: movl %eax, (%esp)
LOCK
#if cond_lock == 0
subl $1, (%ebx)
#else
subl $1, cond_lock(%ebx)
#endif
jne 17f
#if cond_lock == 0
movl %ebx, %eax
#else
leal cond_lock(%ebx), %eax
#endif
call __lll_mutex_unlock_wake
17: popl %eax
jmp 18b
.size __pthread_cond_wait, .-__pthread_cond_wait
.size __pthread_cond_timedwait, .-__pthread_cond_timedwait
versioned_symbol (libpthread, __pthread_cond_timedwait, pthread_cond_timedwait,
GLIBC_2_3_2)
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