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.  */
24 int
__pthread_cond_broadcast(pthread_cond_t * cond)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 
44 weak_alias (__pthread_cond_broadcast, pthread_cond_broadcast);
45