1 /* Copyright (C) 2003, 2007, 2008 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 #include <lowlevellock.h>
21 #include <lowlevelrwlock.h>
22 #include <pthread-errnos.h>
23 #include <tcb-offsets.h>
24 #include <kernel-features.h>
25 #include "lowlevel-atomic.h"
30 .globl pthread_rwlock_timedwrlock
31 .type pthread_rwlock_timedwrlock,@function
33 pthread_rwlock_timedwrlock:
47 CMPXCHG (r3, @r8, r4, r2)
49 CMPXCHG (r3, @(MUTEX,r8), r4, r2)
53 mov.l @(WRITER,r8), r0
56 mov.l @(NR_READERS,r8), r0
60 /* Check the value of the timeout parameter. */
66 mov.l @(WRITERS_QUEUED,r8), r0
68 mov.l r0, @(WRITERS_QUEUED,r8)
72 mov.l @(WRITERS_WAKEUP,r8), r10
83 /* Get current time. */
86 mov #__NR_gettimeofday, r3
92 dmulu.l r0, r1 /* Milli seconds to nano seconds. */
106 bf 16f /* Time is already up. */
108 /* Store relative timeout. */
114 #ifdef __ASSUME_PRIVATE_FUTEX
117 mov #(FUTEX_PRIVATE_FLAG|FUTEX_WAIT), r0
136 add #WRITERS_WAKEUP, r4
144 /* Reget the lock. */
148 CMPXCHG (r5, @r8, r4, r2)
150 CMPXCHG (r5, @(MUTEX,r8), r4, r2)
155 mov.l @(WRITERS_QUEUED,r8), r0
157 mov.l r0, @(WRITERS_QUEUED,r8)
175 mov.l r0, @(WRITER,r8)
180 DEC (@(MUTEX,r8), r2)
194 #ifndef __ASSUME_PRIVATE_FUTEX
196 .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE
244 .word TID - TLS_PRE_TCB_SIZE
248 mov.l @(WRITERS_QUEUED,r8), r1
250 mov.l r1, @(WRITERS_QUEUED,r8)
291 .long __lll_lock_wait-.Lwait6b
293 .long __lll_unlock_wake-.Lwake6b
295 .long __lll_lock_wait-.Lwait7b
297 .long __lll_unlock_wake-.Lwake7b
298 .size pthread_rwlock_timedwrlock,.-pthread_rwlock_timedwrlock