mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-23 05:20:06 +00:00
43 lines
1.3 KiB
C
43 lines
1.3 KiB
C
/* Signal a condition. Generic version.
|
|
Copyright (C) 2000-2020 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
#include <pthread.h>
|
|
|
|
#include <pt-internal.h>
|
|
|
|
/* Unblock at least one of the threads that are blocked on condition
|
|
variable COND. */
|
|
int
|
|
__pthread_cond_signal (pthread_cond_t *cond)
|
|
{
|
|
struct __pthread *wakeup;
|
|
|
|
__pthread_spin_wait (&cond->__lock);
|
|
wakeup = cond->__queue;
|
|
if (wakeup != NULL)
|
|
__pthread_dequeue (wakeup);
|
|
__pthread_spin_unlock (&cond->__lock);
|
|
|
|
if (wakeup != NULL)
|
|
__pthread_wakeup (wakeup);
|
|
|
|
return 0;
|
|
}
|
|
|
|
weak_alias (__pthread_cond_signal, pthread_cond_signal);
|