From 06bdc5bf258dae4afd640ed4d1d6e4e7ed47ad7c Mon Sep 17 00:00:00 2001 From: Eric Wong Date: Mon, 30 Jun 2008 02:43:22 +0000 Subject: introduce struct condition as a more correct version of Notify Start using it in the HTTP code git-svn-id: https://svn.musicpd.org/mpd/trunk@7395 09075e82-0dd4-0310-85a5-a0d7c8717e4f --- src/condition.c | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 84 insertions(+) create mode 100644 src/condition.c (limited to 'src/condition.c') diff --git a/src/condition.c b/src/condition.c new file mode 100644 index 000000000..e71dcdd88 --- /dev/null +++ b/src/condition.c @@ -0,0 +1,84 @@ +/* the Music Player Daemon (MPD) + * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com) + * Copyright (C) 2008 Max Kellermann + * 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" + +void cond_init(struct condition *cond) +{ + xpthread_mutex_init(&cond->mutex, NULL); + xpthread_cond_init(&cond->cond, NULL); +} + +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) +{ + xpthread_cond_destroy(&cond->cond); + xpthread_mutex_destroy(&cond->mutex); +} -- cgit v1.2.3