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/* 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
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