/* 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) { 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); }