1 /* Copyright (C) 2003, 2007 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 <lowlevelrwlock.h>
21 #include <pthread-errnos.h>
22 #include <tcb-offsets.h>
23 #include <kernel-features.h>
24 #include "lowlevel-atomic.h"
26 #define SYS_gettimeofday __NR_gettimeofday
30 #define FUTEX_PRIVATE_FLAG 128
35 .globl pthread_rwlock_timedwrlock
36 .type pthread_rwlock_timedwrlock,@function
38 pthread_rwlock_timedwrlock:
52 CMPXCHG (r3, @r8, r4, r2)
54 CMPXCHG (r3, @(MUTEX,r8), r4, r2)
58 mov.l @(WRITER,r8), r0
61 mov.l @(NR_READERS,r8), r0
65 /* Check the value of the timeout parameter. */
71 mov.l @(WRITERS_QUEUED,r8), r0
73 mov.l r0, @(WRITERS_QUEUED,r8)
77 mov.l @(WRITERS_WAKEUP,r8), r10
88 /* Get current time. */
91 mov #SYS_gettimeofday, r3
97 dmulu.l r0, r1 /* Milli seconds to nano seconds. */
111 bf 16f /* Time is already up. */
113 /* Store relative timeout. */
119 #if __ASSUME_PRIVATE_FUTEX
122 mov #(FUTEX_PRIVATE_FLAG|FUTEX_WAIT), r0
141 add #WRITERS_WAKEUP, r4
149 /* Reget the lock. */
153 CMPXCHG (r5, @r8, r4, r2)
155 CMPXCHG (r5, @(MUTEX,r8), r4, r2)
160 mov.l @(WRITERS_QUEUED,r8), r0
162 mov.l r0, @(WRITERS_QUEUED,r8)
180 mov.l r0, @(WRITER,r8)
185 DEC (@(MUTEX,r8), r2)
199 #if !__ASSUME_PRIVATE_FUTEX
201 .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE
243 .word TID - TLS_PRE_TCB_SIZE
247 mov.l @(WRITERS_QUEUED,r8), r1
249 mov.l r1, @(WRITERS_QUEUED,r8)
284 .long __lll_mutex_lock_wait-.Lwait6b
286 .long __lll_mutex_unlock_wake-.Lwake6b
288 .long __lll_mutex_lock_wait-.Lwait7b
290 .long __lll_mutex_unlock_wake-.Lwake7b
291 .size pthread_rwlock_timedwrlock,.-pthread_rwlock_timedwrlock