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PsnBarrier.cxx

Go to the documentation of this file.

/*
 * This file is part of openMask © INRIA, CNRS, Universite de Rennes 1 1993-2002, thereinafter the Software
 * 
 * The Software has been developped within the Siames Project. 
 * INRIA, the University of Rennes 1 and CNRS jointly hold intellectual property rights
 * 
 * The Software has been registered with the Agence pour la Protection des
 * Programmes (APP) under registration number IDDN.FR.001.510008.00.S.P.2001.000.41200
 *  
 * This file may be distributed under the terms of the Q Public License
 * version 1.0 as defined by Trolltech AS of Norway and appearing in the file
 * LICENSE.QPL included in the packaging of this file.
 *
 * Licensees holding valid specific licenses issued by INRIA, CNRS or Université de Rennes 1 
 * for the software may use this file in accordance with that specific license
 *
 */
#include <PsnBarrier.h>
#include <iostream>
#ifdef _SPROC
char *PsnBarrier::nomfich="/tmp/barXXXXXX";
usptr_t *PsnBarrier::handle=usinit(mktemp(nomfich));
#endif

PsnBarrier::PsnBarrier(int nbProc) :
   _count ( 1 ),
   _nbThreads ( nbProc )
 {
#ifdef _SPROC
  if (_handle == NULL) 
     {
        perror("PsnBarrier :: constructeur :: Impossible de créer le usptr nécessaire");
        exit(1);
     }
  _barriere = new_barrier( _handle );
  if(_barriere == NULL) 
     {
        perror("PsnBarrier :: constructeur :: impossible de créer une nouvelle barrière");
        exit(1);
     }
#else
  pthread_mutex_init ( &_mylock , NULL ) ;
  pthread_cond_init ( &_cond , NULL ) ;
#endif
}

PsnBarrier::~PsnBarrier() 
{
#ifdef _SPROC
  free_barrier( _barriere );
#else
  pthread_mutex_destroy(&_mylock);
  pthread_cond_destroy(&_cond);
#endif
}

void PsnBarrier::Sync() {
#ifdef _SPROC
  barrier(_barriere,_nbThreads);
#ifdef _DEBUG
  cout<<"une syncronisation"<<endl;
#endif
#else
#ifdef _DEBUGLOCK
  cout<<"PsnBarrier::"<<this<<"::"<<pthread_self()<<"::Sync()";
#endif
  pthread_mutex_lock ( &_mylock ) ;
  if (_count < _nbThreads)
    {
      _count++;
      pthread_cond_wait ( &_cond,
                          &_mylock ) ;

      pthread_mutex_unlock ( &_mylock ) ;
    }
  else
    {
      pthread_mutex_unlock ( &_mylock ) ;
      _count = 1;
      pthread_cond_broadcast ( &_cond ) ;
    }
#ifdef _DEBUGLOCK
  cerr<<" passée par "<<pthread_self()<<endl;
#endif
#endif
}

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