1/* Broadcast a condition. Generic version.
2 Copyright (C) 2000-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
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.
9
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.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19#include <pthread.h>
20
21#include <pt-internal.h>
22
23/* Unblock all threads that are blocked on condition variable COND. */
24int
25__pthread_cond_broadcast (pthread_cond_t *cond)
26{
27 struct __pthread *wakeup;
28
29 __pthread_spin_wait (&cond->__lock);
30 while ((wakeup = cond->__queue))
31 {
32 __pthread_dequeue (wakeup);
33 __pthread_spin_unlock (&cond->__lock);
34 /* Wake it up without spin held, so it may have a chance to really
35 preempt us */
36 __pthread_wakeup (wakeup);
37 __pthread_spin_wait (&cond->__lock);
38 }
39 __pthread_spin_unlock (&cond->__lock);
40
41 return 0;
42}
43
44weak_alias (__pthread_cond_broadcast, pthread_cond_broadcast);
45

source code of glibc/sysdeps/htl/pt-cond-brdcast.c