1 /* Copyright (C) 2003-2014 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, see
16 <http://www.gnu.org/licenses/>. */
19 #include <lowlevellock.h>
20 #include <lowlevelrwlock.h>
21 #include <pthread-errnos.h>
22 #include <tcb-offsets.h>
23 #include <kernel-features.h>
24 #include "lowlevel-atomic.h"
29 .globl pthread_rwlock_timedwrlock
30 .type pthread_rwlock_timedwrlock,@function
33 pthread_rwlock_timedwrlock:
35 cfi_adjust_cfa_offset (4)
36 cfi_rel_offset (r12, 0)
38 cfi_adjust_cfa_offset (4)
39 cfi_rel_offset (r10, 0)
41 cfi_adjust_cfa_offset (4)
42 cfi_rel_offset (r9, 0)
44 cfi_adjust_cfa_offset (4)
45 cfi_rel_offset (r8, 0)
47 cfi_adjust_cfa_offset (4)
48 cfi_rel_offset (pr, 0)
50 cfi_adjust_cfa_offset (8)
58 CMPXCHG (r3, @r8, r4, r2)
60 CMPXCHG (r3, @(MUTEX,r8), r4, r2)
64 mov.l @(WRITER,r8), r0
67 mov.l @(NR_READERS,r8), r0
71 /* Check the value of the timeout parameter. */
77 mov.l @(WRITERS_QUEUED,r8), r0
79 mov.l r0, @(WRITERS_QUEUED,r8)
83 mov.l @(WRITERS_WAKEUP,r8), r10
94 /* Get current time. */
97 mov #__NR_gettimeofday, r3
103 dmulu.l r0, r1 /* Milli seconds to nano seconds. */
117 bf 16f /* Time is already up. */
119 /* Store relative timeout. */
125 #ifdef __ASSUME_PRIVATE_FUTEX
128 mov #(FUTEX_PRIVATE_FLAG|FUTEX_WAIT), r0
147 add #WRITERS_WAKEUP, r4
155 /* Reget the lock. */
159 CMPXCHG (r5, @r8, r4, r2)
161 CMPXCHG (r5, @(MUTEX,r8), r4, r2)
166 mov.l @(WRITERS_QUEUED,r8), r0
168 mov.l r0, @(WRITERS_QUEUED,r8)
186 mov.l r0, @(WRITER,r8)
191 DEC (@(MUTEX,r8), r2)
198 cfi_adjust_cfa_offset (-8)
200 cfi_adjust_cfa_offset (-4)
203 cfi_adjust_cfa_offset (-4)
206 cfi_adjust_cfa_offset (-4)
209 cfi_adjust_cfa_offset (-4)
212 cfi_adjust_cfa_offset (-4)
218 #ifndef __ASSUME_PRIVATE_FUTEX
220 .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE
268 .word TID - TLS_PRE_TCB_SIZE
272 mov.l @(WRITERS_QUEUED,r8), r1
274 mov.l r1, @(WRITERS_QUEUED,r8)
316 .long __lll_lock_wait-.Lwait6b
318 .long __lll_unlock_wake-.Lwake6b
320 .long __lll_lock_wait-.Lwait7b
322 .long __lll_unlock_wake-.Lwake7b
323 .size pthread_rwlock_timedwrlock,.-pthread_rwlock_timedwrlock