06bdc5bf25
Start using it in the HTTP code git-svn-id: https://svn.musicpd.org/mpd/trunk@7395 09075e82-0dd4-0310-85a5-a0d7c8717e4f
77 lines
2.2 KiB
C
77 lines
2.2 KiB
C
/* the Music Player Daemon (MPD)
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* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
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* Copyright (C) 2008 Max Kellermann <max@duempel.org>
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* This project's homepage is: http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef CONDITION_H
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#define CONDITION_H
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#include "os_compat.h"
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struct condition {
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pthread_mutex_t mutex;
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pthread_cond_t cond;
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};
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void cond_init(struct condition *cond);
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/**
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* The thread which shall be notified by this object must call this
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* function before any cond_wait() invocation. It locks the mutex.
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*/
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void cond_enter(struct condition *cond);
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/**
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* Neutralize cond_leave().
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*/
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void cond_leave(struct condition *cond);
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/**
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* Wait for a conditio. Return immediately if we have already
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* been notified since we last returned from cond_wait().
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*/
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void cond_wait(struct condition *cond);
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/**
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* Wait for a condition with timeout
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*
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* @param sec number of seconds to wait for (subject to change)
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*
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* @return ETIMEDOUT if timed out, 0 if notification was received
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*/
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int cond_timedwait(struct condition *cond, const long sec);
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/**
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* Notify the thread there is a waiter. This function never blocks.
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*
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* @return EBUSY if it was unable to lock the mutex, 0 on success
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*/
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int cond_signal_async(struct condition *cond);
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/**
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* Notify the thread synchronously, i.e. wait until it can deliver
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* the notification.
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*/
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void cond_signal_sync(struct condition *cond);
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/**
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* cond_destroy - destroy the cond and internal structures
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*/
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void cond_destroy(struct condition *cond);
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#endif /* CONDITION_H */
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