1 /* Copyright (C) 2003, 2004, 2006 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 <shlib-compat.h>
21 #include <lowlevelcond.h>
22 #include <kernel-features.h>
23 #include <pthread-pi-defines.h>
24 #include "lowlevel-atomic.h"
29 #define FUTEX_REQUEUE 3
30 #define FUTEX_CMP_REQUEUE 4
36 /* int pthread_cond_broadcast (pthread_cond_t *cond) */
37 .globl __pthread_cond_broadcast
38 .type __pthread_cond_broadcast, @function
40 __pthread_cond_broadcast:
47 /* Get internal lock. */
51 CMPXCHG (r3, @(cond_lock,r8), r4, r2)
53 CMPXCHG (r3, @r8, r4, r2)
57 mov.l @(total_seq+4,r8),r0
58 mov.l @(total_seq,r8),r1
59 mov.l @(wakeup_seq+4,r8), r2
64 mov.l @(wakeup_seq,r8), r2
69 /* Cause all currently waiting threads to recognize they are
71 mov.l r1, @(wakeup_seq,r8)
72 mov.l r0, @(wakeup_seq+4,r8)
73 mov.l r1, @(woken_seq,r8)
74 mov.l r0, @(woken_seq+4,r8)
75 mov.l @(broadcast_seq,r8), r2
77 mov.l r2, @(broadcast_seq,r8)
80 mov.l r10, @(cond_futex,r8)
82 /* Get the address of the mutex used. */
83 mov.l @(dep_mutex,r8), r9
87 DEC (@(cond_lock,r8), r2)
95 /* Don't use requeue for pshared condvars. */
102 /* XXX: The kernel so far doesn't support requeue to PI futex. */
103 mov.l @(MUTEX_KIND,r9), r0
107 /* Wake up all threads. */
108 mov #FUTEX_CMP_REQUEUE, r5
111 shlr r7 /* r7 = 0x7fffffff */
113 # if MUTEX_FUTEX != 0
122 /* For any kind of error, which mainly is EAGAIN, we try again
123 with WAKE. The general test also covers running on old
145 DEC (@(cond_lock,r8), r2)
160 /* Initial locking failed. */
173 /* Unlock in loop requires wakeup. */
186 /* Unlock in loop requires wakeup. */
201 shlr r6 /* r6 = 0x7fffffff */
212 .long __lll_mutex_lock_wait-.Lmwait5b
214 .long __lll_mutex_unlock_wake-.Lmwake5b
216 .long __lll_mutex_unlock_wake-.Lmwake6b
217 .size __pthread_cond_broadcast, .-__pthread_cond_broadcast
218 versioned_symbol (libpthread, __pthread_cond_broadcast, pthread_cond_broadcast,