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 <lowlevellock.h>
21 #include <lowlevelrwlock.h>
22 #include <kernel-features.h>
23 #include "lowlevel-atomic.h"
28 .globl __pthread_rwlock_unlock
29 .type __pthread_rwlock_unlock,@function
31 __pthread_rwlock_unlock:
41 CMPXCHG (r3, @r8, r4, r2)
43 CMPXCHG (r3, @(MUTEX,r8), r4, r2)
47 mov.l @(WRITER,r8), r0
50 mov.l @(NR_READERS,r8), r0
52 mov.l r0, @(NR_READERS,r8)
57 mov.l r0, @(WRITER,r8)
60 add #WRITERS_WAKEUP, r4
61 mov.l @(WRITERS_QUEUED,r8), r0
65 /* If also no readers waiting nothing to do. */
66 mov.l @(READERS_QUEUED,r8), r0
71 shlr r6 /* r6 = 0x7fffffff */
73 add #READERS_WAKEUP, r4
88 #ifdef __ASSUME_PRIVATE_FUTEX
91 mov #(FUTEX_PRIVATE_FLAG|FUTEX_WAKE), r0
121 DEC (@(MUTEX,r8), r2)
180 #ifndef __ASSUME_PRIVATE_FUTEX
182 .word PRIVATE_FUTEX - TLS_PRE_TCB_SIZE
186 .long __lll_lock_wait-.Lwait8b
188 .long __lll_unlock_wake-.Lwake8b
190 .long __lll_unlock_wake-.Lwake9b
191 .size __pthread_rwlock_unlock,.-__pthread_rwlock_unlock
193 .globl pthread_rwlock_unlock
194 pthread_rwlock_unlock = __pthread_rwlock_unlock
196 .globl __pthread_rwlock_unlock_internal
197 __pthread_rwlock_unlock_internal = __pthread_rwlock_unlock