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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 <pthread-errnos.h>
#include "lowlevel-atomic.h"
#define SYS_gettimeofday __NR_gettimeofday
#define SYS_futex 240
#define FUTEX_WAIT 0
#define FUTEX_WAKE 1
.text
.globl sem_timedwait
.type sem_timedwait,@function
.align 5
sem_timedwait:
mov.l @r4, r0
2:
tst r0, r0
bt 1f
mov r0, r3
mov r0, r6
add #-1, r3
CMPXCHG (r6, @r4, r3, r2)
bf/s 2b
mov r2, r0
rts
mov #0, r0
1:
/* Check whether the timeout value is valid. */
mov.l r12, @-r15
mov.l r9, @-r15
mov.l r8, @-r15
sts.l pr, @-r15
add #-8, r15
mov r4, r8
mov r5, r9
/* Check for invalid nanosecond field. */
mov.l @(4,r9), r0
mov.l .L1g, r1
cmp/hs r1, r0
bt/s 6f
mov #EINVAL, r0
7:
/* Compute relative timeout. */
mov r15, r4
mov #0, r5
mov #SYS_gettimeofday, r3
trapa #0x12
SYSCALL_INST_PAD
mov.l @(4,r15), r0
mov.w .L1k, r1
dmulu.l r0, r1 /* Milli seconds to nano seconds. */
mov.l @r9, r2
mov.l @(4,r9), r3
mov.l @r15, r0
sts macl, r1
sub r0, r2
clrt
subc r1, r3
bf 5f
mov.l .L1g, r1
add r1, r3
add #-1, r2
5:
cmp/pz r2
bf 6f /* Time is already up. */
/* Store relative timeout. */
mov.l r2, @r15
mov.l r3, @(4,r15)
/* Futex call. */
mov r8, r4
mov #FUTEX_WAIT, r5
mov #0, r6
mov r15, r7
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
tst r0, r0
bt 9f
cmp/eq #-EWOULDBLOCK, r0
bf 3f
9:
mov.l @r8, r0
8:
tst r0, r0
bt 7b
mov r0, r3
mov r0, r4
add #-1, r3
CMPXCHG (r4, @r8, r3, r2)
bf/s 8b
mov r2, r0
add #8, r15
lds.l @r15+, pr
mov.l @r15+, r8
mov.l @r15+, r9
mov.l @r15+, r12
rts
mov #0, r0
3:
neg r0, r0
6:
mov r0, r8
mova .Lgot2, r0
mov.l .Lgot2, r12
add r0, r12
#if USE___THREAD
mov.l .Lerrno2, r0
stc gbr, r1
mov.l @(r0, r12), r0
add r1, r0
mov.l r8, @r0
#else
mov.l .Lerrloc2, r1
bsrf r1
nop
.Lerrloc2b:
mov.l r8, @r0
#endif
add #8, r15
lds.l @r15+, pr
mov.l @r15+, r8
mov.l @r15+, r9
mov.l @r15+, r12
rts
mov #-1, r0
.L1k:
.word 1000
.align 2
.L1g:
.long 1000000000
.Lgot2:
.long _GLOBAL_OFFSET_TABLE_
#if USE___THREAD
.Lerrno2:
.long errno@GOTTPOFF
#else
.Lerrloc2:
.long __errno_location@PLT-(.Lerrloc2b+2-.)
#endif
.size sem_timedwait,.-sem_timedwait
|
