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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* Copyright (C) 2008 Max Kellermann <max@duempel.org>
* This project's homepage is: http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "condition.h"
#include "utils.h"
#include "log.h"
#include <sys/time.h>
#include <string.h>
void cond_init(struct condition *cond)
{
int err;
if ((err = pthread_mutex_init(&cond->mutex, NULL)))
FATAL("failed to init mutex: %s\n", strerror(err));
if ((err = pthread_cond_init(&cond->cond, NULL)))
FATAL("failed to init cond: %s\n", strerror(err));
}
void cond_enter(struct condition *cond)
{
pthread_mutex_lock(&cond->mutex);
}
void cond_leave(struct condition *cond)
{
pthread_mutex_unlock(&cond->mutex);
}
void cond_wait(struct condition *cond)
{
pthread_cond_wait(&cond->cond, &cond->mutex);
}
static struct timespec * ts_timeout(struct timespec *ts, const long sec)
{
struct timeval tv;
gettimeofday(&tv, NULL);
ts->tv_sec = tv.tv_sec + sec;
ts->tv_nsec = tv.tv_usec * 1000;
return ts;
}
int cond_timedwait(struct condition *cond, const long sec)
{
struct timespec ts;
int ret = pthread_cond_timedwait(&cond->cond, &cond->mutex,
ts_timeout(&ts, sec));
if (!ret || ret == ETIMEDOUT)
return ret;
FATAL("cond_timedwait: %s\n", strerror(ret));
return ret;
}
int cond_signal_async(struct condition *cond)
{
if (!pthread_mutex_trylock(&cond->mutex)) {
pthread_cond_signal(&cond->cond);
pthread_mutex_unlock(&cond->mutex);
return 0;
}
return EBUSY;
}
void cond_signal_sync(struct condition *cond)
{
pthread_cond_signal(&cond->cond);
}
void cond_destroy(struct condition *cond)
{
int err;
if ((err = pthread_cond_destroy(&cond->cond)))
FATAL("failed to destroy cond: %s\n", strerror(err));
if ((err = pthread_mutex_destroy(&cond->mutex)))
FATAL("failed to destroy mutex: %s\n", strerror(err));
}
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