mipinterchaintimer.h

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/*
    
  This file is a part of EMIPLIB, the EDM Media over IP Library.
  
  Copyright (C) 2006-2011  Hasselt University - Expertise Centre for
                      Digital Media (EDM) (http://www.edm.uhasselt.be)

  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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  
  USA

*/

#ifndef MIPINTERCHAINTIMER_H

#define MIPINTERCHAINTIMER_H

#include "mipconfig.h"
#include "mipcomponent.h"
#include "mipsystemmessage.h"
#include "mipsignalwaiter.h"
#include "miptime.h"
#include <jthread/jthread.h>

class EMIPLIB_IMPORTEXPORT MIPInterChainTimer : public MIPComponent
{
public:
        MIPInterChainTimer();
        ~MIPInterChainTimer();
        
        bool init(int count = 1, MIPTime safetyTimeout = MIPTime(0.5));
        
        bool destroy();

        MIPComponent *getTriggerComponent();

        bool push(const MIPComponentChain &chain, int64_t iteration, MIPMessage *pMsg);
        bool pull(const MIPComponentChain &chain, int64_t iteration, MIPMessage **pMsg);
private:
        class TriggerComponent : public MIPComponent, public jthread::JThread
        {
        public:
                TriggerComponent(MIPSignalWaiter &sigWait, int count) : MIPComponent("MIPInterChainTimer::TriggerComponent"), m_sigWait(sigWait)
                {
                        m_targetCount = count;
                        m_counter = 0;
                }

                ~TriggerComponent()
                {
                        stopSafetyThread();
                }
                
                bool startSafetyThread(MIPTime timeout);
                void stopSafetyThread();
                
                bool push(const MIPComponentChain &chain, int64_t iteration, MIPMessage *pMsg);
                bool pull(const MIPComponentChain &chain, int64_t iteration, MIPMessage **pMsg);
        private:
                void *Thread();

                MIPSignalWaiter &m_sigWait;
                int m_targetCount;
                int m_counter;
                MIPTime m_prevTime;
                MIPTime m_timeout;
                jthread::JMutex m_stopMutex;
                bool m_stopThread;
        };

        MIPSignalWaiter m_sigWait;
        TriggerComponent *m_pTriggerComp;
        bool m_init;
        MIPSystemMessage m_timeMsg;
        bool m_gotMsg;
        int64_t m_prevIteration;
};

#endif // MIPINTERCHAINTIMER_H