1 /* Copyright (C) 2002, 2003, 2005, 2007 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, write to the Free
17 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
21 #include <lowlevelrwlock.h>
37 .globl __pthread_rwlock_unlock
38 .type __pthread_rwlock_unlock,@function
40 __pthread_rwlock_unlock:
48 cmpxchgl %esi, MUTEX(%rdi)
52 2: cmpl $0, WRITER(%rdi)
57 5: movl $0, WRITER(%rdi)
59 leaq WRITERS_WAKEUP(%rdi), %r10
61 cmpl $0, WRITERS_QUEUED(%rdi)
64 /* If also no readers waiting nothing to do. */
65 cmpl $0, READERS_QUEUED(%rdi)
68 movl $0x7fffffff, %edx
69 leaq READERS_WAKEUP(%rdi), %r10
81 #if __ASSUME_PRIVATE_FUTEX
82 movl $FUTEX_PRIVATE_FLAG|FUTEX_WAKE, %esi
83 xorl PSHARED(%rdi), %esi
85 movl $FUTEX_WAKE, %esi
86 orl PSHARED(%rdi), %esi
87 xorl %fs:PRIVATE_FUTEX, %esi
112 callq __lll_mutex_lock_wait
122 callq __lll_mutex_unlock_wake
129 callq __lll_mutex_unlock_wake
132 .size __pthread_rwlock_unlock,.-__pthread_rwlock_unlock
134 .globl pthread_rwlock_unlock
135 pthread_rwlock_unlock = __pthread_rwlock_unlock
137 .globl __pthread_rwlock_unlock_internal
138 __pthread_rwlock_unlock_internal = __pthread_rwlock_unlock