EventQueue.h

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/*
 *    scampl4cpp/engine
 *
 *    Copyright by European Southern Observatory, 2012
 *    All rights reserved
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License as published by the Free Software Foundation; either
 *    version 2.1 of the License, or (at your option) any later version.
 *
 *    This library 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
 *    Lesser General Public License for more details.
 *
 *    You should have received a copy of the GNU Lesser General Public
 *    License along with this library; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 
 *    02111-1307 USA.
 */
 
/*
 * $Id: EventQueue.h 1139 2016-07-20 14:57:28Z landolfa $
 */
 
#ifndef SCXML4CPP_EVENTQUEUE_H
#define SCXML4CPP_EVENTQUEUE_H
 
#ifndef __cplusplus
#error This is a C++ include file and cannot be used from plain C
#endif
 
#include <queue>
#include <mutex>
 
#ifndef SCXML4CPP_EVENT_H
#include "scxml4cpp/Event.h"
#endif
 
namespace scxml4cpp {
 
class EventQueue
{
 public:
    EventQueue();
    virtual ~EventQueue();
 
    void   add(Event* e);
    Event* remove();
    bool   isEmpty() const;
    int    size() const;
    void   clear();
 
 private:
    std::queue<Event*> mEvents;
    std::mutex         mMutex;
 
    EventQueue(const EventQueue&);             
    EventQueue& operator= (const EventQueue&); 
 
};
 
}  // namespace scxml4cpp
 
#endif  // SCXML4CPP_EVENTQUEUE_H