Event_POSIX.h

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/* ES40 emulator.
 * Copyright (C) 2007-2008 by the ES40 Emulator Project
 *
 * WWW    : http://sourceforge.net/projects/es40
 * E-mail : camiel@camicom.com
 * 
 * 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.
 * 
 * Although this is not required, the author would appreciate being notified of, 
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//
// Event_POSIX.h
//
// $Id: Event_POSIX.h,v 1.1 2008/03/31 19:13:30 iamcamiel Exp $
//
// Library: Foundation
// Package: Threading
// Module:  Event
//
// Definition of the EventImpl class for POSIX Threads.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#ifndef Foundation_Event_POSIX_INCLUDED
#define Foundation_Event_POSIX_INCLUDED


#include "VMS/Foundation.h"
#include "VMS/Exception.h"
#include <pthread.h>
#include <errno.h>


namespace Poco {


class Foundation_API EventImpl
{
protected:
        EventImpl(bool autoReset);              
        ~EventImpl();
        void setImpl();
        void waitImpl();
        bool waitImpl(long milliseconds);
        void resetImpl();
        
private:
        bool            _auto;
        volatile bool   _state;
        pthread_mutex_t _mutex;
        pthread_cond_t  _cond;
};


//
// inlines
//
inline void EventImpl::setImpl()
{
        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 EventImpl::resetImpl()
{
        if (pthread_mutex_lock(&_mutex))        
                throw SystemException("cannot reset event");
        _state = false;
        pthread_mutex_unlock(&_mutex);
}


} // namespace Poco


#endif // Foundation_Event_POSIX_INCLUDED

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