AlternateThreadPT.hxx

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// Copyright (C) 2006-2016  CEA/DEN, EDF R&D
//
// 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
//
// See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
//
#ifndef __ALTERNATETHREADPT_HXX__
#define __ALTERNATETHREADPT_HXX__

#include <pthread.h>

#include "YACSBasesExport.hxx"

namespace YACS
{
  namespace BASES
  {

    class YACSBASES_EXPORT AlternateThreadPT
    {
    public:
      enum ThreadStatus {UNEXISTING, NORMAL_CYCLE, TERMINATION_REQUESTED, READY_TO_JOIN};

      AlternateThreadPT();
      virtual ~AlternateThreadPT();


      void start();

      virtual void signalSlaveAndWait();

      void terminateSlaveThread();

      virtual void signalMasterAndWait();

      bool isTerminationRequested() const;

      ThreadStatus getThreadStatus() const;

    protected:

      virtual void run()=0;

    private:
      void signalAndWait();

      static void * runThread(void * instance);
      static void threadCleanupFct(void * instance);

      pthread_t _threadId;
      ThreadStatus _threadStatus;
      pthread_cond_t _pingPongCond;
      pthread_mutex_t _pingPongMutex;

    };
  }
}

#endif