88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
/* the Music Player Daemon (MPD)
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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* Copyright (C) 2008 Max Kellermann <max@duempel.org>
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* This project's homepage is: http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "condition.h"
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#include "utils.h"
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#include "log.h"
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#include <sys/time.h>
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#include <string.h>
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void cond_init(struct condition *cond)
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{
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xpthread_mutex_init(&cond->mutex, NULL);
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xpthread_cond_init(&cond->cond, NULL);
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}
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void cond_enter(struct condition *cond)
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{
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pthread_mutex_lock(&cond->mutex);
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}
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void cond_leave(struct condition *cond)
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{
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pthread_mutex_unlock(&cond->mutex);
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}
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void cond_wait(struct condition *cond)
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{
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pthread_cond_wait(&cond->cond, &cond->mutex);
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}
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static struct timespec * ts_timeout(struct timespec *ts, const long sec)
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{
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struct timeval tv;
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gettimeofday(&tv, NULL);
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ts->tv_sec = tv.tv_sec + sec;
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ts->tv_nsec = tv.tv_usec * 1000;
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return ts;
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}
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int cond_timedwait(struct condition *cond, const long sec)
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{
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struct timespec ts;
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int ret = pthread_cond_timedwait(&cond->cond, &cond->mutex,
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ts_timeout(&ts, sec));
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if (!ret || ret == ETIMEDOUT)
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return ret;
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FATAL("cond_timedwait: %s\n", strerror(ret));
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return ret;
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}
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int cond_signal_async(struct condition *cond)
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{
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if (!pthread_mutex_trylock(&cond->mutex)) {
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pthread_cond_signal(&cond->cond);
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pthread_mutex_unlock(&cond->mutex);
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return 0;
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}
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return EBUSY;
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}
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void cond_signal_sync(struct condition *cond)
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{
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pthread_cond_signal(&cond->cond);
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}
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void cond_destroy(struct condition *cond)
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{
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xpthread_cond_destroy(&cond->cond);
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xpthread_mutex_destroy(&cond->mutex);
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}
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