/* 
* <thread.h>
* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
* (C) OPAC Team, LIFL, 2002-2007
*
* Sebastien Cahon, Alexandru-Adrian Tantar
*
* 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
*
*/

#ifndef THREAD_H_
#define THREAD_H_

#include <vector>

/* A high-level thread */

class Thread {
	
public:

  /* Ctor */
  Thread ();

  /* Dtor */
  virtual ~ Thread ();
  
  /* Go ! */
  virtual void start () = 0;

  void setActive ();/* It means the current process is going to send messages soon */
  void setPassive ();/* The current process is not going to perform send operations
			(but it may receive messages) */

private :
  
  bool act;
};

extern void addThread (Thread * __hl_thread, std :: vector <pthread_t *> & __ll_threads);

extern void joinThreads (std :: vector <pthread_t *> & __ll_threads);

extern bool atLeastOneActiveThread (); /* It returns 'true' iff at least one process is going
				      to send messages */
  
extern unsigned numberOfActiveThreads ();


#endif /*THREAD_H_*/