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/* Copyright (C) 2002, 2003, 2004, 2006 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>
.text
#ifndef LOCK
# ifdef UP
# define LOCK
# else
# define LOCK lock
# endif
#endif
#define SYS_gettimeofday __NR_gettimeofday
#define SYS_futex 240
#define FUTEX_WAIT 0
#define FUTEX_WAKE 1
.globl __lll_mutex_lock_wait
.type __lll_mutex_lock_wait,@function
.hidden __lll_mutex_lock_wait
.align 16
__lll_mutex_lock_wait:
cfi_startproc
pushl %edx
cfi_adjust_cfa_offset(4)
pushl %ebx
cfi_adjust_cfa_offset(4)
pushl %esi
cfi_adjust_cfa_offset(4)
cfi_offset(%edx, -8)
cfi_offset(%ebx, -12)
cfi_offset(%esi, -16)
movl $2, %edx
movl %ecx, %ebx
xorl %esi, %esi /* No timeout. */
xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */
cmpl %edx, %eax /* NB: %edx == 2 */
jne 2f
1: movl $SYS_futex, %eax
ENTER_KERNEL
2: movl %edx, %eax
xchgl %eax, (%ebx) /* NB: lock is implied */
testl %eax, %eax
jnz,pn 1b
popl %esi
cfi_adjust_cfa_offset(-4)
cfi_restore(%esi)
popl %ebx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebx)
popl %edx
cfi_adjust_cfa_offset(-4)
cfi_restore(%edx)
ret
cfi_endproc
.size __lll_mutex_lock_wait,.-__lll_mutex_lock_wait
#ifdef NOT_IN_libc
.globl __lll_mutex_timedlock_wait
.type __lll_mutex_timedlock_wait,@function
.hidden __lll_mutex_timedlock_wait
.align 16
__lll_mutex_timedlock_wait:
cfi_startproc
/* Check for a valid timeout value. */
cmpl $1000000000, 4(%edx)
jae 3f
pushl %edi
cfi_adjust_cfa_offset(4)
pushl %esi
cfi_adjust_cfa_offset(4)
pushl %ebx
cfi_adjust_cfa_offset(4)
pushl %ebp
cfi_adjust_cfa_offset(4)
cfi_offset(%edi, -8)
cfi_offset(%esi, -12)
cfi_offset(%ebx, -16)
cfi_offset(%ebp, -20)
/* Stack frame for the timespec and timeval structs. */
subl $8, %esp
cfi_adjust_cfa_offset(8)
movl %ecx, %ebp
movl %edx, %edi
1:
/* Get current time. */
movl %esp, %ebx
xorl %ecx, %ecx
movl $SYS_gettimeofday, %eax
ENTER_KERNEL
/* Compute relative timeout. */
movl 4(%esp), %eax
movl $1000, %edx
mul %edx /* Milli seconds to nano seconds. */
movl (%edi), %ecx
movl 4(%edi), %edx
subl (%esp), %ecx
subl %eax, %edx
jns 4f
addl $1000000000, %edx
subl $1, %ecx
4: testl %ecx, %ecx
js 5f /* Time is already up. */
/* Store relative timeout. */
movl %ecx, (%esp)
movl %edx, 4(%esp)
movl %ebp, %ebx
movl $1, %eax
movl $2, %edx
LOCK
cmpxchgl %edx, (%ebx)
testl %eax, %eax
je 8f
/* Futex call. */
movl %esp, %esi
xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */
movl $SYS_futex, %eax
ENTER_KERNEL
movl %eax, %ecx
8: /* NB: %edx == 2 */
xorl %eax, %eax
LOCK
cmpxchgl %edx, (%ebx)
jnz 7f
6: addl $8, %esp
cfi_adjust_cfa_offset(-8)
popl %ebp
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebp)
popl %ebx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebx)
popl %esi
cfi_adjust_cfa_offset(-4)
cfi_restore(%esi)
popl %edi
cfi_adjust_cfa_offset(-4)
cfi_restore(%edi)
ret
3: movl $EINVAL, %eax
ret
cfi_adjust_cfa_offset(24)
cfi_offset(%edi, -8)
cfi_offset(%esi, -12)
cfi_offset(%ebx, -16)
cfi_offset(%ebp, -20)
/* Check whether the time expired. */
7: cmpl $-ETIMEDOUT, %ecx
je 5f
/* Make sure the current holder knows we are going to sleep. */
movl %edx, %eax
xchgl %eax, (%ebx)
testl %eax, %eax
jz 6b
jmp 1b
5: movl $ETIMEDOUT, %eax
jmp 6b
cfi_endproc
.size __lll_mutex_timedlock_wait,.-__lll_mutex_timedlock_wait
#endif
#ifdef NOT_IN_libc
.globl lll_unlock_wake_cb
.type lll_unlock_wake_cb,@function
.hidden lll_unlock_wake_cb
.align 16
lll_unlock_wake_cb:
pushl %ebx
pushl %ecx
pushl %edx
movl 20(%esp), %ebx
LOCK
subl $1, (%ebx)
je 1f
movl $FUTEX_WAKE, %ecx
movl $1, %edx /* Wake one thread. */
movl $SYS_futex, %eax
movl $0, (%ebx)
ENTER_KERNEL
1: popl %edx
popl %ecx
popl %ebx
ret
.size lll_unlock_wake_cb,.-lll_unlock_wake_cb
#endif
.globl __lll_mutex_unlock_wake
.type __lll_mutex_unlock_wake,@function
.hidden __lll_mutex_unlock_wake
.align 16
__lll_mutex_unlock_wake:
cfi_startproc
pushl %ebx
cfi_adjust_cfa_offset(4)
pushl %ecx
cfi_adjust_cfa_offset(4)
pushl %edx
cfi_adjust_cfa_offset(4)
cfi_offset(%ebx, -8)
cfi_offset(%ecx, -12)
cfi_offset(%edx, -16)
movl %eax, %ebx
movl $0, (%eax)
movl $FUTEX_WAKE, %ecx
movl $1, %edx /* Wake one thread. */
movl $SYS_futex, %eax
ENTER_KERNEL
popl %edx
cfi_adjust_cfa_offset(-4)
cfi_restore(%edx)
popl %ecx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ecx)
popl %ebx
cfi_adjust_cfa_offset(-4)
cfi_restore(%ebx)
ret
cfi_endproc
.size __lll_mutex_unlock_wake,.-__lll_mutex_unlock_wake
#ifdef NOT_IN_libc
.globl __lll_timedwait_tid
.type __lll_timedwait_tid,@function
.hidden __lll_timedwait_tid
.align 16
__lll_timedwait_tid:
pushl %edi
pushl %esi
pushl %ebx
pushl %ebp
movl %eax, %ebp
movl %edx, %edi
subl $8, %esp
/* Get current time. */
2: movl %esp, %ebx
xorl %ecx, %ecx
movl $SYS_gettimeofday, %eax
ENTER_KERNEL
/* Compute relative timeout. */
movl 4(%esp), %eax
movl $1000, %edx
mul %edx /* Milli seconds to nano seconds. */
movl (%edi), %ecx
movl 4(%edi), %edx
subl (%esp), %ecx
subl %eax, %edx
jns 5f
addl $1000000000, %edx
subl $1, %ecx
5: testl %ecx, %ecx
js 6f /* Time is already up. */
movl %ecx, (%esp) /* Store relative timeout. */
movl %edx, 4(%esp)
movl (%ebp), %edx
testl %edx, %edx
jz 4f
movl %esp, %esi
xorl %ecx, %ecx /* movl $FUTEX_WAIT, %ecx */
movl %ebp, %ebx
movl $SYS_futex, %eax
ENTER_KERNEL
cmpl $0, (%ebx)
jne 1f
4: xorl %eax, %eax
3: addl $8, %esp
popl %ebp
popl %ebx
popl %esi
popl %edi
ret
1: cmpl $-ETIMEDOUT, %eax
jne 2b
6: movl $ETIMEDOUT, %eax
jmp 3b
.size __lll_timedwait_tid,.-__lll_timedwait_tid
#endif
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