event_posix.h

来自「This software aims to create an applet a」· C头文件 代码 · 共 119 行

//
// Event_POSIX.h
//
// $Id: //poco/Main/Foundation/include/Foundation/Event_POSIX.h#5 $
//
// Definition of the EventImp class for POSIX Threads.
//
// Copyright (c) 2004, Guenter Obiltschnig/Applied Informatics.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
//
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// 3. Redistributions in any form must be accompanied by information on
//    how to obtain complete source code for this software and any
//    accompanying software that uses this software.  The source code
//    must either be included in the distribution or be available for no
//    more than the cost of distribution plus a nominal fee, and must be
//    freely redistributable under reasonable conditions.  For an
//    executable file, complete source code means the source code for all
//    modules it contains.  It does not include source code for modules or
//    files that typically accompany the major components of the operating
//    system on which the executable file runs.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
//


#ifndef Foundation_Event_POSIX_INCLUDED
#define Foundation_Event_POSIX_INCLUDED


#ifndef Foundation_Foundation_INCLUDED
#include "Foundation/Foundation.h"
#endif
#ifndef Foundation_Exception_INCLUDED
#include "Foundation/Exception.h"
#endif
#ifndef STD_PTHREAD_INCLUDED
#include <pthread.h>
#define STD_PTHREAD_INCLUDED
#endif
#ifndef STD_ERRNO_INCLUDED
#include <errno.h>
#define STD_ERRNO_INCLUDED
#endif


Foundation_BEGIN


class Foundation_API EventImp
{
protected:
	EventImp(bool autoReset);		
	~EventImp();
	void setImp();
	void waitImp();
	bool waitImp(long milliseconds);
	void resetImp();
	
private:
	bool            _auto;
	volatile bool   _state;
	pthread_mutex_t _mutex;
	pthread_cond_t  _cond;
};


//
// inlines
//
inline void EventImp::setImp()
{
	if (pthread_mutex_lock(&_mutex))	
		throw SystemException("cannot signal event (lock)");
	_state = true;
	if (pthread_cond_broadcast(&_cond))
	{
		pthread_mutex_unlock(&_mutex);
		throw SystemException("cannot signal event");
	}
	pthread_mutex_unlock(&_mutex);
}


inline void EventImp::resetImp()
{
	if (pthread_mutex_lock(&_mutex))	
		throw SystemException("cannot reset event");
	_state = false;
	pthread_mutex_unlock(&_mutex);
}


Foundation_END


#endif // Foundation_Event_POSIX_INCLUDED