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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 "lowlevel-atomic.h"
.text
#define SYS_gettimeofday __NR_gettimeofday
#define SYS_futex 240
#define FUTEX_WAIT 0
#define FUTEX_WAKE 1
#define EWOULDBLOCK 11
#define EINVAL 22
#define ETIMEDOUT 110
.globl __lll_mutex_lock_wait
.type __lll_mutex_lock_wait,@function
.hidden __lll_mutex_lock_wait
.align 5
__lll_mutex_lock_wait:
mov r4, r6
mov r5, r4
mov #0, r7 /* No timeout. */
mov #FUTEX_WAIT, r5
1:
add #1, r6 /* account for the preceeded xadd. */
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
mov #1, r3
XADD (r3, @r4, r6)
tst r6, r6
bf 1b
mov #2, r1
mov.l r1, @r4
ret
mov #0, r0
.size __lll_mutex_lock_wait,.-__lll_mutex_lock_wait
.globl __lll_mutex_timedlock_wait
.type __lll_mutex_timedlock_wait,@function
.hidden __lll_mutex_timedlock_wait
.align 5
__lll_mutex_timedlock_wait:
/* Check for a valid timeout value. */
mov.l @(4,r6), r1
mov.l .L1g, r0
cmp/hs r0, r1
bt 3f
mov.l r10, @-r15
mov.l r9, @-r15
mov.l r8, @-r15
mov r5, r8
mov r6, r9
mov r4, r10
add #1, r10
/* Stack frame for the timespec and timeval structs. */
add #-8, r15
1:
/* Get current time. */
mov r15, r4
mov #0, r5
mov #SYS_gettimeofday, r3
trapa #0x12
SYSCALL_INST_PAD
/* Compute relative timeout. */
mov.l @(4,r15), r0
mov.w .L1k, r1
dmulu.l r0, r1 /* Micro 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 4f
mov.l .L1g, r1
add r1, r3
add #-1, r2
4:
cmp/pz r2
bf 5f /* Time is already up. */
mov.l r2, @r15 /* Store relative timeout. */
mov.l r3, @(4,r15)
mov r8, r4
mov #FUTEX_WAIT, r5
mov r10, r6
mov r15, r7
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
mov #1, r3
XADD (r3, @r8, r10)
tst r10, r10
bf 7f
mov #2, r1
mov.l r1, @r8
mov #0, r0
6:
add #8, r15
mov.l @r15+, r8
mov.l @r15+, r9
rts
mov.l @r15+, r10
7:
/* Check whether the time expired. */
mov #-ETIMEDOUT, r1
cmp/eq r0, r1
bt 5f
bra 1b
nop
3:
rts
mov #EINVAL, r0
5:
bra 6b
mov #ETIMEDOUT, r0
.L1k:
.word 1000
.align 2
.L1g:
.long 1000000000
.size __lll_mutex_timedlock_wait,.-__lll_mutex_timedlock_wait
.globl __lll_mutex_unlock_wake
.type __lll_mutex_unlock_wake,@function
.hidden __lll_mutex_unlock_wake
.align 5
__lll_mutex_unlock_wake:
mov #FUTEX_WAKE, r5
mov #1, r6 /* Wake one thread. */
mov #0, r7
mov.l r7, @r4 /* Stores 0. */
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
rts
nop
.size __lll_mutex_unlock_wake,.-__lll_mutex_unlock_wake
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