recv.cpp

/*
* <recv.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 "comm.h"
#include "tags.h"
#include "worker.h"
#include "scheduler.h"
#include "synchron.h"
#include "mess.h"
#include "node.h"
#include "../../core/runner.h"
#include "../../core/cooperative.h"
#include "../../core/peo_debug.h"

void receiveMessages ()
{

  cleanBuffers ();

  do
    {

      if (! atLeastOneActiveThread ())
        {

          waitMessage ();
        }

      int src, tag;

      while (probeMessage (src, tag))
        {

          receiveMessage (src, tag);
          initMessage ();

          switch (tag)
            {

            case RUNNER_STOP_TAG:
              unpackTerminationOfRunner ();
              break;

            case SYNCHRONIZE_REQ_TAG:
              unpackSynchronRequest ();
              break;

            case SYNCHRONIZED_TAG:
            {
              RUNNER_ID runner_id;
              unpack (runner_id);

              COOP_ID coop_id;
              unpack (coop_id);

              getCooperative (coop_id) -> notifySynchronized ();
              break;
            }

            case COOP_TAG:
              COOP_ID coop_id;
              unpack (coop_id);
              getCooperative (coop_id) -> unpack ();
              getCooperative (coop_id) -> notifyReceiving ();
              break;

            case SCHED_REQUEST_TAG:
              unpackResourceRequest ();
              break;

            case SCHED_RESULT_TAG:
            {
              /* Unpacking the resource */
              SERVICE_ID serv_id;
              unpack (serv_id);
              Service * serv = getService (serv_id);
              int dest;
              unpack (dest);
              WORKER_ID worker_id;
              unpack (worker_id);

              /* Going back ... */
              initMessage ();
              pack (worker_id);
              pack (serv_id);
              serv -> packData ();
              serv -> notifySendingData ();
              sendMessage (dest, TASK_DATA_TAG);
              break;
            }

            case TASK_DATA_TAG:
            {
              WORKER_ID worker_id;
              unpack (worker_id);
              Worker * worker = getWorker (worker_id);
              worker -> setSource (src);
              worker -> unpackData ();
              worker -> wakeUp ();
              break;
            }

            case TASK_RESULT_TAG:
            {
              SERVICE_ID serv_id;
              unpack (serv_id);
              Service * serv = getService (serv_id);
              serv -> unpackResult ();
              break;
            }

            case TASK_DONE_TAG:
              unpackTaskDone ();
              break;

            default:
              ;
            };
        }

    }
  while ( ! atLeastOneActiveThread () && atLeastOneActiveRunner () /*&& ! allResourcesFree ()*/ );
}

---