cosmopolitan/libc/thread/pthread_cond_broadcast.c
2022-12-11 14:30:59 -08:00

42 lines
2.4 KiB
C

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/thread/thread.h"
#include "third_party/nsync/cv.h"
/**
* Wakes all threads waiting on condition, e.g.
*
* pthread_cond_t cond = PTHREAD_COND_INITIALIZER;
* pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
* // ...
* pthread_mutex_lock(&lock);
* pthread_cond_broadcast(&cond);
* pthread_mutex_unlock(&lock);
*
* This function has no effect if there aren't any threads currently
* waiting on the condition.
*
* @return 0 on success, or errno on error
* @see pthread_cond_signal
* @see pthread_cond_wait
*/
errno_t pthread_cond_broadcast(pthread_cond_t *cond) {
nsync_cv_broadcast((nsync_cv *)cond);
return 0;
}