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glibc/nptl/sysdeps/unix/sysv/linux/sh/pthread_cond_broadcast.S
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/* Copyright (C) 2003 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
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> | |
#include "lowlevel-atomic.h" | |
#define SYS_futex 240 | |
#define FUTEX_WAIT 0 | |
#define FUTEX_WAKE 1 | |
.text | |
/* int pthread_cond_broadcast (pthread_cond_t *cond) */ | |
.globl __pthread_cond_broadcast | |
.type __pthread_cond_broadcast, @function | |
.align 5 | |
__pthread_cond_broadcast: | |
mov.l r8, @-r15 | |
sts.l pr, @-r15 | |
mov r4, r8 | |
/* Get internal lock. */ | |
mov #1, r3 | |
#if cond_lock != 0 | |
XADD (r3, @(cond_lock,r8), r2) | |
#else | |
XADD (r3, @r8, r2) | |
#endif | |
tst r2, r2 | |
bf 1f | |
2: | |
mov.l @(total_seq+4,r8),r0 | |
mov.l @(total_seq,r8),r1 | |
mov.l @(wakeup_seq+4,r8), r2 | |
cmp/hi r2, r0 | |
bt 3f | |
cmp/hi r0, r2 | |
bt 4f | |
mov.l @(wakeup_seq,r8), r2 | |
cmp/hi r2, r1 | |
bf 4f | |
3: | |
/* Cause all currently waiting threads to recognize they are | |
woken up. */ | |
mov.l r1, @(wakeup_seq,r8) | |
mov.l r0, @(wakeup_seq+4,r8) | |
/* Unlock. */ | |
#if cond_lock != 0 | |
DEC (@(cond_lock,r8), r2) | |
#else | |
DEC (@r8, r2) | |
#endif | |
tst r2, r2 | |
bf 7f | |
8: | |
/* Wake up all threads. */ | |
mov r8, r4 | |
add #wakeup_seq, r4 | |
mov #FUTEX_WAKE, r5 | |
mov #-1, r6 | |
shlr r6 /* r6 = 0x7fffffff */ | |
mov #0, r7 | |
mov #SYS_futex, r3 | |
extu.b r3, r3 | |
trapa #0x14 | |
SYSCALL_INST_PAD | |
mov #0, r0 | |
lds.l @r15+, pr | |
rts | |
mov.l @r15+, r8 | |
4: | |
/* Unlock. */ | |
#if cond_lock != 0 | |
DEC (@(cond_lock,r8), r2) | |
#else | |
DEC (@r8, r2) | |
#endif | |
tst r2, r2 | |
bf 5f | |
6: | |
mov #0, r0 | |
lds.l @r15+, pr | |
rts | |
mov.l @r15+, r8 | |
1: | |
/* Initial locking failed. */ | |
mov r8, r5 | |
#if cond_lock != 0 | |
add #cond_lock, r5 | |
#endif | |
mov.l .Lmwait5, r1 | |
bsrf r1 | |
mov r2, r4 | |
.Lmwait5b: | |
bra 2b | |
nop | |
5: | |
/* Unlock in loop requires wakeup. */ | |
mov r8, r4 | |
#if cond_lock != 0 | |
add #cond_lock, r4 | |
#endif | |
mov.l .Lmwake5, r1 | |
bsrf r1 | |
nop | |
.Lmwake5b: | |
bra 6b | |
nop | |
7: | |
/* Unlock in loop requires wakeup. */ | |
mov r8, r4 | |
#if cond_lock != 0 | |
add #cond_lock, r4 | |
#endif | |
mov.l .Lmwake6, r1 | |
bsrf r1 | |
nop | |
.Lmwake6b: | |
bra 8b | |
nop | |
.align 2 | |
.Lmwait5: | |
.long __lll_mutex_lock_wait-.Lmwait5b | |
.Lmwake5: | |
.long __lll_mutex_unlock_wake-.Lmwake5b | |
.Lmwake6: | |
.long __lll_mutex_unlock_wake-.Lmwake6b | |
.size __pthread_cond_broadcast, .-__pthread_cond_broadcast | |
versioned_symbol (libpthread, __pthread_cond_broadcast, pthread_cond_broadcast, | |
GLIBC_2_3_2) |