/* the Music Player Daemon (MPD) * 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 */ #ifndef NOTIFY_H #define NOTIFY_H #include "os_compat.h" typedef struct _Notify { pthread_mutex_t mutex; pthread_cond_t cond; int pending; } Notify; int notify_init(Notify *notify); /** * The thread which shall be notified by this object must call this * function before any notify_wait() invocation. It locks the mutex. */ void notify_enter(Notify *notify); /** * Neutralize notify_leave(). */ void notify_leave(Notify *notify); /** * Wait for a notification. Return immediately if we have already * been notified since we last returned from notify_wait(). */ void notify_wait(Notify *notify); /** * Notify the thread. This function never blocks. */ void notify_signal(Notify *notify); /** * Notify the thread synchonously, i.e. wait until it has received the * notification. */ void notify_signal_sync(Notify *notify); #endif