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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
/*
* This library implements inter-process signalling using blocking
* read() on an anonymous pipe. As a side effect, the read() system
* call has the same signal interruption behaviour as the old sleep
* function.
*
* As soon as mpd uses threading instead of fork()/shm, we can replace
* this library with a pthread_cond object.
*
* This code is experimental and carries a lot of overhead. Still, it
* uses less resources than the old polling code with a fixed sleep
* time.
*
*/
typedef struct _Notify {
int fds[2];
} Notify;
int initNotify(Notify *notify);
int waitNotify(Notify *notify);
int signalNotify(Notify *notify);
#endif
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