/*
* <comm.cpp>
* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2008
* (C) OPAC Team, LIFL, 2002-2008
*
* Sebastien Cahon, Alexandru-Adrian Tantar, Clive Canape
*
* This software is governed by the CeCILL license under French law and
* abiding by the rules of distribution of free software.  You can  use,
* modify and/ or redistribute the software under the terms of the CeCILL
* license as circulated by CEA, CNRS and INRIA at the following URL
* "http://www.cecill.info".
*
* As a counterpart to the access to the source code and  rights to copy,
* modify and redistribute granted by the license, users are provided only
* with a limited warranty  and the software's author,  the holder of the
* economic rights,  and the successive licensors  have only  limited liability.
*
* In this respect, the user's attention is drawn to the risks associated
* with loading,  using,  modifying and/or developing or reproducing the
* software by the user in light of its specific status of free software,
* that may mean  that it is complicated to manipulate,  and  that  also
* therefore means  that it is reserved for developers  and  experienced
* professionals having in-depth computer knowledge. Users are therefore
* encouraged to load and test the software's suitability as regards their
* requirements in conditions enabling the security of their systems and/or
* data to be ensured and,  more generally, to use and operate it in the
* same conditions as regards security.
* The fact that you are presently reading this means that you have had
* knowledge of the CeCILL license and that you accept its terms.
*
* ParadisEO WebSite : http://paradiseo.gforge.inria.fr
* Contact: paradiseo-help@lists.gforge.inria.fr
*
*/


#include <mpi.h>

#include "comm.h"
#include "mess.h"
#include "node.h"
#include "param.h"
#include "../../core/peo_debug.h"
#include "../../core/runner.h"
#include "send.h"
#include "recv.h"
#include "scheduler.h"

static sem_t sem_comm_init;

static Communicator * the_thread;


Communicator :: Communicator (int * __argc, char * * * __argv)
{

  the_thread = this;
  initNode  (__argc, __argv);
  loadRMCParameters (* __argc, * __argv);

  sem_post (& sem_comm_init);
}

void Communicator :: start ()
{

  while (true)
    {

      /* Zzz Zzz Zzz :-))) */
      sleep ();

      sendMessages ();

      if (! atLeastOneActiveRunner () && ! atLeastOneActiveThread() && allResourcesFree ())
        break;

      receiveMessages ();
    }

  waitBuffers ();
  printDebugMessage ("finalizing");

  //synchronizeNodes ();
}

void initCommunication ()
{

  static bool initializedSemaphore = false;

  if (initializedSemaphore)
    {
      sem_destroy(& sem_comm_init);
    }

  sem_init (& sem_comm_init, 0, 0);
  initializedSemaphore = true;
}

void waitNodeInitialization ()
{

  sem_wait (& sem_comm_init);
}

void wakeUpCommunicator ()
{

  the_thread -> wakeUp ();
}