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/**
* File: CondWait.h
* Project: libvdr - classes taken from vdr-project
*
* from "Video Disk Recorder":
*
* Copyright (C) 2000, 2003, 2006, 2008 Klaus Schmidinger
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* Or, point your browser to http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
*
* The original author can be reached at kls@tvdr.de
*
* The vdr project's page is at http://www.tvdr.de
*
*/
#ifndef CONDWAIT_H
#define CONDWAIT_H
#include <pthread.h>
class cCondWait {
public:
cCondWait(void);
~cCondWait();
bool Wait(int TimeoutMs = 0);
///< Waits at most TimeoutMs milliseconds for a call to Signal(), or
///< forever if TimeoutMs is 0.
///< \return Returns true if Signal() has been called, false it the given
///< timeout has expired.
void Signal(void);
///< Signals a caller of Wait() that the condition it is waiting for is met.
static void SleepMs(int TimeoutMs);
///< Creates a cCondWait object and uses it to sleep for TimeoutMs
///< milliseconds, immediately giving up the calling thread's time
///< slice and thus avoiding a "busy wait".
///< In order to avoid a possible busy wait, TimeoutMs will be automatically
///< limited to values >2.
private:
pthread_mutex_t mutex;
pthread_cond_t cond;
bool signaled;
};
#endif /* CONDWAIT_H */
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