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# communicable.h

    00001 // -*- mode: c++; c-indent-level: 4; c++-member-init-indent: 8; comment-column: 35; -*-
    00002
    00003 // "communicable.h"
    00004
    00005 // (c) OPAC Team, LIFL, August 2005
    00006
    00007 /* This library is free software; you can redistribute it and/or
    00008    modify it under the terms of the GNU Lesser General Public
    00009    License as published by the Free Software Foundation; either
    00010    version 2 of the License, or (at your option) any later version.
    00011
    00012    This library is distributed in the hope that it will be useful,
    00013    but WITHOUT ANY WARRANTY; without even the implied warranty of
    00014    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00015    Lesser General Public License for more details.
    00016
    00017    You should have received a copy of the GNU Lesser General Public
    00018    License along with this library; if not, write to the Free Software
    00019    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
    00020
    00021    Contact: paradiseo-help@lists.gforge.inria.fr
    00022 */
    00023
    00024 #ifndef __communicable_h
    00025 #define __communicable_h
    00026
    00027 #include <semaphore.h>
    00028
    00029 typedef unsigned COMM_ID;
    00030
    00031 class Communicable {
    00032
    00033 public :
    00034
    00035   Communicable ();
    00036
    00037   virtual ~ Communicable ();
    00038
    00039   COMM_ID getKey ();
    00040
    00041   void lock (); /* It suspends the current process if the semaphore is locked */
    00042   void unlock (); /* It unlocks the shared semaphore */
    00043
    00044   void stop (); /* It suspends the current process */
    00045   void resume (); /* It resumes ___________ */
    00046
    00047 protected :
    00048
    00049   COMM_ID key;
    00050
    00051   sem_t sem_lock;
    00052
    00053   sem_t sem_stop;
    00054
    00055   static unsigned num_comm;
    00056 };
    00057
    00058 extern Communicable * getCommunicable (COMM_ID __key);
    00059
    00060 //extern COMM_ID getKey (const Communicable * __comm);
    00061
    00062 #endif