thread.h

00001 /* 
00002 * <thread.h>
00003 * Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
00004 * (C) OPAC Team, LIFL, 2002-2007
00005 *
00006 * Sebastien Cahon, Alexandru-Adrian Tantar
00007 *
00008 * This software is governed by the CeCILL license under French law and
00009 * abiding by the rules of distribution of free software.  You can  use,
00010 * modify and/ or redistribute the software under the terms of the CeCILL
00011 * license as circulated by CEA, CNRS and INRIA at the following URL
00012 * "http://www.cecill.info".
00013 *
00014 * As a counterpart to the access to the source code and  rights to copy,
00015 * modify and redistribute granted by the license, users are provided only
00016 * with a limited warranty  and the software's author,  the holder of the
00017 * economic rights,  and the successive licensors  have only  limited liability.
00018 *
00019 * In this respect, the user's attention is drawn to the risks associated
00020 * with loading,  using,  modifying and/or developing or reproducing the
00021 * software by the user in light of its specific status of free software,
00022 * that may mean  that it is complicated to manipulate,  and  that  also
00023 * therefore means  that it is reserved for developers  and  experienced
00024 * professionals having in-depth computer knowledge. Users are therefore
00025 * encouraged to load and test the software's suitability as regards their
00026 * requirements in conditions enabling the security of their systems and/or
00027 * data to be ensured and,  more generally, to use and operate it in the
00028 * same conditions as regards security.
00029 * The fact that you are presently reading this means that you have had
00030 * knowledge of the CeCILL license and that you accept its terms.
00031 *
00032 * ParadisEO WebSite : http://paradiseo.gforge.inria.fr
00033 * Contact: paradiseo-help@lists.gforge.inria.fr
00034 *
00035 */
00036 
00037 #ifndef THREAD_H_
00038 #define THREAD_H_
00039 
00040 #include <vector>
00041 
00042 /* A high-level thread */
00043 
00044 class Thread {
00045         
00046 public:
00047 
00048   /* Ctor */
00049   Thread ();
00050 
00051   /* Dtor */
00052   virtual ~ Thread ();
00053   
00054   /* Go ! */
00055   virtual void start () = 0;
00056 
00057   void setActive ();/* It means the current process is going to send messages soon */
00058   void setPassive ();/* The current process is not going to perform send operations
00059                         (but it may receive messages) */
00060 
00061 private :
00062   
00063   bool act;
00064 };
00065 
00066 extern void addThread (Thread * __hl_thread, std :: vector <pthread_t *> & __ll_threads);
00067 
00068 extern void joinThreads (std :: vector <pthread_t *> & __ll_threads);
00069 
00070 extern bool atLeastOneActiveThread (); /* It returns 'true' iff at least one process is going
00071                                       to send messages */
00072   
00073 extern unsigned numberOfActiveThreads ();
00074 
00075 
00076 #endif /*THREAD_H_*/

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