Event.h

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// ****************************************************************************
// This file is part of the Integrating Vision Toolkit (IVT).
//
// The IVT is maintained by the Karlsruhe Institute of Technology (KIT)
// (www.kit.edu) in cooperation with the company Keyetech (www.keyetech.de).
//
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// All rights reserved.
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// 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.
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// 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.
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//    used to endorse or promote products derived from this software
//    without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE KIT AND CONTRIBUTORS “AS IS” AND ANY
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// ****************************************************************************
// ****************************************************************************
// Filename:  Event.h
// Author:    Kai Welke
// Date:      13.01.2006
// ****************************************************************************


#ifndef _EVENT_H_
#define _EVENT_H_


// ****************************************************************************
// Necessary includes
// ****************************************************************************

#include "Threading.h"

#ifdef WIN32
#include <windows.h>
#else
#include <pthread.h>
#endif



// ****************************************************************************
// CEvent
// ****************************************************************************

class CEvent
{
public:
        // constructor
        CEvent();

        // destructor
        ~CEvent();

        // resets all pending signals
        void Reset();

        // waits for an event, under linux the minimum wait time is one second
        Threading::EEventStatus Wait(int nMS = Threading::WAIT_INFINITE);

        // signals an event
        void Signal();


private:
#ifdef WIN32
        CRITICAL_SECTION m_CSWindowsMutex;
        HANDLE m_SignalEvent;
#else
        pthread_mutex_t m_PosixMutex;
        pthread_mutexattr_t m_MutexAttr;
        pthread_cond_t m_PosixConditional;
        pthread_condattr_t m_ConditionalAttr;
        
        bool m_bSignaled;
#endif
};



#endif /* _EVENT_H */