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/* Copyright (C) 2003, 2004, 2005 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 <pthread-errnos.h>
#include "lowlevel-atomic.h"
.text
#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 5
cfi_startproc
__lll_mutex_lock_wait:
mov.l r8, @-r15
cfi_adjust_cfa_offset(4)
cfi_rel_offset (r8, 0)
mov r4, r6
mov r5, r8
mov #0, r7 /* No timeout. */
mov #FUTEX_WAIT, r5
mov #2, r4
cmp/eq r4, r6
bf 2f
1:
mov r8, r4
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
2:
mov #2, r6
XCHG (r6, @r8, r2)
tst r2, r2
bf 1b
mov.l @r15+, r8
ret
mov r2, r0
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 5
cfi_startproc
__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
cfi_adjust_cfa_offset(4)
cfi_rel_offset (r10, 0)
mov.l r9, @-r15
cfi_adjust_cfa_offset(4)
cfi_rel_offset (r9, 0)
mov.l r8, @-r15
cfi_adjust_cfa_offset(4)
cfi_rel_offset (r8, 0)
mov r4, r10
mov r6, r9
mov r5, r8
/* Stack frame for the timespec and timeval structs. */
add #-8, r15
cfi_adjust_cfa_offset(8)
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 #1, r3
mov #2, r4
CMPXCHG (r3, @r8, r4, r2)
tst r2, r2
bt 8f
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 r0, r5
8:
mov #0, r3
mov #2, r4
CMPXCHG (r3, @r8, r4, r2)
bf/s 7f
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 r5, r1
bt 5f
/* Make sure the current holder knows we are going to sleep. */
XCHG (r2, @r8, r3)
tst r3, r3
bt/s 6b
mov #0, r0
bra 1b
nop
3:
rts
mov #EINVAL, r0
5:
bra 6b
mov #ETIMEDOUT, r0
cfi_endproc
.L1k:
.word 1000
.align 2
.L1g:
.long 1000000000
.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 5
cfi_startproc
lll_unlock_wake_cb:
DEC (@r4, r2)
tst r2, r2
bt 1f
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
1:
rts
nop
cfi_endproc
.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 5
cfi_startproc
__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
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 5
cfi_startproc
__lll_timedwait_tid:
mov.l r9, @-r15
cfi_adjust_cfa_offset(4)
cfi_rel_offset (r9, 0)
mov.l r8, @-r15
cfi_adjust_cfa_offset(4)
cfi_rel_offset (r8, 0)
mov r4, r8
mov r5, r9
/* Stack frame for the timespec and timeval structs. */
add #-8, r15
cfi_adjust_cfa_offset(8)
2:
/* 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 .L1k2, 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 5f
mov.l .L1g2, r1
add r1, r3
add #-1, r2
5:
cmp/pz r2
bf 6f /* Time is already up. */
mov.l r2, @r15 /* Store relative timeout. */
mov.l r3, @(4,r15)
mov.l @r8, r2
tst r2, r2
bt 4f
mov r8, r4
mov #FUTEX_WAIT, r5
mov r2, r6
mov r15, r7
mov #SYS_futex, r3
extu.b r3, r3
trapa #0x14
SYSCALL_INST_PAD
mov.l @r8, r2
tst r2, r2
bf 1f
4:
mov #0, r0
3:
add #8, r15
mov.l @r15+, r8
rts
mov.l @r15+, r9
1:
/* Check whether the time expired. */
mov #-ETIMEDOUT, r1
cmp/eq r0, r1
bf 2b
6:
bra 3b
mov #ETIMEDOUT, r0
cfi_endproc
.L1k2:
.word 1000
.align 2
.L1g2:
.long 1000000000
.size __lll_timedwait_tid,.-__lll_timedwait_tid
#endif
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