git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@810 331e1502-861f-0410-8da2-ba01fb791d7f

trunk/paradiseo-peo/src/core/communicable.cpp

@@ -46,6 +46,7 @@ static std :: map <const Communicable *, unsigned> comm_to_key; /* Map of regist
 
 unsigned Communicable :: num_comm = 0;
 
+
 Communicable :: Communicable () {
 
   comm_to_key [this] = key = ++ num_comm;

trunk/paradiseo-peo/src/core/communicable.h

@@ -75,6 +75,4 @@ extern void initCommunicableEnv ();
 
 extern Communicable * getCommunicable (COMM_ID __key); 
 
-//extern COMM_ID getKey (const Communicable * __comm);
-
 #endif

trunk/paradiseo-peo/src/core/eoVector_mesg.h

@@ -44,7 +44,14 @@
 
 template <class F, class T> void pack (const eoVector <F, T> & __v) {
 
-  pack (__v.fitness ()) ;
+  if (__v.invalid()) {
+    pack((unsigned)0);
+  }
+  else {
+    pack((unsigned)1); 
+    pack (__v.fitness ());
+  }
+
   unsigned len = __v.size ();
   pack (len);
   for (unsigned i = 0 ; i < len; i ++)
@@ -53,9 +60,16 @@ template <class F, class T> void pack (const eoVector <F, T> & __v) {
 
 template <class F, class T> void unpack (eoVector <F, T> & __v) {
 
+  unsigned valid; unpack(valid);
+
+  if (! valid) {
+    __v.invalidate();
+  }
+  else {
     F fit; 
     unpack (fit);
     __v.fitness (fit);
+  }
 
   unsigned len;
   unpack (len);

trunk/paradiseo-peo/src/core/messaging.h

@@ -129,5 +129,4 @@ template <class U, class V> void unpack (std :: pair <U, V> & __pair) {
   unpack (__pair.second);
 }
 
-
 #endif

trunk/paradiseo-peo/src/core/peo_debug.cpp

@@ -50,12 +50,14 @@
 
 #define DEBUG_PATH "./log/"
 
+
 static bool debug = true;
 
 static char host [MAX_BUFF_SIZE];
 
 std :: vector <FILE *> files;
 
+
 void setDebugMode (bool __dbg) {
 
   debug = __dbg;

trunk/paradiseo-peo/src/core/peo_fin.cpp

@@ -44,7 +44,6 @@ void peo :: finalize () {
   printDebugMessage ("waiting for the termination of all threads");
 
   joinRunners ();
-
   finalizeRMC ();
 
   printDebugMessage ("this is the end");

trunk/paradiseo-peo/src/core/peo_init.cpp

@@ -38,11 +38,14 @@
 
 #include "peo_init.h"
 #include "peo_param.h"
+
 #include "peo_debug.h"
 #include "rmc.h"
+#include "runner.h"
 
 
 extern void initCommunicableEnv ();
+extern void initBuffers ();
 
 extern void initThreadsEnv ();
 extern void initReactiveThreadsEnv ();
@@ -50,10 +53,14 @@ extern void initReactiveThreadsEnv ();
 extern void initRunnersEnv ();
 extern void initWorkersEnv ();
 
+extern void initScheduler ();
+
 
 static void initExecutionEnv() {
 
   initCommunicableEnv ();
+  initBuffers ();
+  initScheduler();
 
   initThreadsEnv ();
   initReactiveThreadsEnv ();
@@ -62,6 +69,7 @@ static void initExecutionEnv() {
   initWorkersEnv ();
 }
 
+
 namespace peo {
 
   int * argc;
@@ -77,12 +85,12 @@ namespace peo {
     /* Initializing the execution environment */
     initExecutionEnv();
 
-    /* Initializing the the Resource Management and Communication */
-    initRMC (__argc, __argv);
-
     /* Loading the common parameters */ 
     loadParameters (__argc, __argv);
 
+    /* Initializing the the Resource Management and Communication */
+    initRMC ( *peo::argc, *peo::argv);
+
     /* */
     initDebugging ();
   }

trunk/paradiseo-peo/src/core/peo_param.cpp

@@ -40,7 +40,6 @@
 #include "peo_debug.h"
 
 
-
 void peo :: loadParameters (int & __argc, char * * & __argv) {
 
   eoParser parser (__argc, __argv);

trunk/paradiseo-peo/src/core/peo_run.cpp

@@ -34,11 +34,11 @@
 *
 */
 
-#include "peo_init.h"
 #include "peo_run.h"
 #include "rmc.h"
 #include "runner.h"
 
+
 void peo :: run () {
 
   startRunners ();

trunk/paradiseo-peo/src/core/reac_thread.cpp

@@ -40,6 +40,7 @@ static bool the_end = false;
 
 static std :: vector <ReactiveThread *> reac_threads;
 
+
 ReactiveThread :: ReactiveThread () {
 
   reac_threads.push_back (this);

trunk/paradiseo-peo/src/core/reac_thread.h

@@ -62,6 +62,4 @@ extern void initReactiveThreadsEnv ();
 
 extern void stopReactiveThreads ();
 
-extern bool theEnd ();
-
 #endif /*REAC_THREAD_H_*/

trunk/paradiseo-peo/src/core/runner.cpp

@@ -95,50 +95,19 @@ Runner * getRunner (RUNNER_ID __key) {
   return dynamic_cast <Runner *> (getCommunicable (__key));
 }
 
-void packExecutionContext () {
-
-  num_local_exec_runners = 0;
-  for (unsigned i = 0; i < the_runners.size (); i ++)
-    if (the_runners [i] -> isAssignedLocally ()) num_local_exec_runners ++;
-  pack(num_local_exec_runners);
-}
-
-void unpackExecutionContext () {
-
-  unsigned num_remote_runners;
-  unpack(num_remote_runners);
-  num_exec_runners += num_remote_runners;
-}
-
 void initializeContext () {
 
-  initMessage ();
-  packExecutionContext ();
-  sendMessageToAll (EXECUTION_CONTEXT_TAG);
+  num_local_exec_runners = 0;
 
-  int src, tag;
-  for (unsigned i = 0; i < getNumberOfNodes(); i ++) {
-
-    cleanBuffers ();
-    waitMessage ();
-
-    probeMessage ( src, tag );
-    receiveMessage( src, tag );
-
-    initMessage ();
-    unpackExecutionContext ();
+  // setting up the execution IDs & counting the number of local exec. runners
+  for (unsigned i = 0; i < the_runners.size (); i ++) {
+    the_runners [i] -> setExecutionID ( my_node -> execution_id_run[ i ] );
+    if (the_runners [i] -> isAssignedLocally ()) num_local_exec_runners ++;
   }
 
-  cleanBuffers ();
+  collectiveCountOfRunners( &num_local_exec_runners, &num_exec_runners );
 
-  // setting up the execution IDs
-  for (unsigned i = 0; i < the_runners.size (); i ++)
-    the_runners [i] -> setExecutionID ( my_node -> execution_id_run[ i ] );
-
-
-  // synchronizing - all the nodes have to finish initializing
-  // the context before actually executing the runners
-  synchronizeNodes ();
+  // synchronizeNodes ();
 
   for (unsigned i = 0; i < the_runners.size (); i ++)
     if (the_runners [i] -> isAssignedLocally ()) the_runners [i] -> notifyContextInitialized ();
@@ -217,6 +186,7 @@ void unpackTerminationOfRunner () {
 
     printDebugMessage ("All the runners have terminated - now stopping the reactive threads.");
     stopReactiveThreads ();
+    printDebugMessage ("Reactive threads stopped!");
   }
 }
 

trunk/paradiseo-peo/src/core/thread.cpp

@@ -42,6 +42,7 @@ static std :: vector <Thread *> threads;
 
 unsigned num_act = 0;
 
+
 Thread :: Thread () {
 
   threads.push_back (this);
@@ -53,8 +54,6 @@ Thread :: ~ Thread () {
   /* Nothing ! */
 }
 
-extern int getNodeRank ();
-
 void Thread :: setActive () {
 
   if (! act) {

trunk/paradiseo-peo/src/core/topology.cpp

@@ -45,4 +45,3 @@ void Topology :: add (Cooperative & __mig) {
 
   mig.push_back (& __mig) ;
 }
-

trunk/paradiseo-peo/src/peoEA.h

@@ -80,9 +80,9 @@
 //!	<tr><td>... &nbsp;</td> <td> &nbsp; </td></tr>
 //!	</table>
 template < class EOT > class peoEA : public Runner
-  {
+{
 
-  public:
+public:
 
   //! Constructor for the evolutionary algorithm object - several basic parameters have to be specified,
   //! allowing for different levels of parallelism. Depending on the requirements, a sequential or a parallel
@@ -112,8 +112,8 @@ template < class EOT > class peoEA : public Runner
   //! @param eoPop< EOT >& __pop - initial population of the algorithm, to be iteratively evolved;
   void operator()( eoPop< EOT >& __pop );
 
-  private:
 
+private:
 
   eoContinue< EOT >& cont;
   peoPopEval< EOT >& pop_eval;
@@ -121,7 +121,7 @@ template < class EOT > class peoEA : public Runner
   peoTransform< EOT >& trans;
   eoReplacement< EOT >& replace;
   eoPop< EOT >* pop;
-  };
+};
 
 
 template < class EOT > peoEA< EOT > :: peoEA(
@@ -150,7 +150,7 @@ template< class EOT > void peoEA< EOT > :: operator ()( eoPop< EOT >& __pop )
 template< class EOT > void peoEA< EOT > :: run()
 {
 
-  printDebugMessage( "performing the first evaluation of the population." );
+  printDebugMessage( "peoEA: performing the first evaluation of the population." );
   pop_eval( *pop );
 
   do
@@ -158,22 +158,21 @@ template< class EOT > void peoEA< EOT > :: run()
 
     eoPop< EOT > off;
 
-      printDebugMessage( "performing the selection step." );
+    printDebugMessage( "peoEA: performing the selection step." );
     select( *pop, off );
     trans( off );
 
-      printDebugMessage( "performing the evaluation of the population." );
+    printDebugMessage( "peoEA: performing the evaluation of the population." );
 
     pop_eval( off );
 
-      printDebugMessage( "performing the replacement of the population." );
+    printDebugMessage( "peoEA: performing the replacement of the population." );
     replace( *pop, off );
 
-      printDebugMessage( "deciding of the continuation." );
+    printDebugMessage( "peoEA: deciding of the continuation." );
 
   }
   while ( cont( *pop ) );
 }
 
-
 #endif

trunk/paradiseo-peo/src/peoEvalFunc.h

@@ -43,7 +43,7 @@ template< class EOT, class FitT = EOT::Fitness, class FunctionArg = const EOT& >
 template< class EOT, class FitT = typename EOT::Fitness, class FunctionArg = const EOT& >
 #endif
 struct peoEvalFunc: public eoEvalFunc<EOT>
-  {
+{
 
   peoEvalFunc( FitT (* _eval)( FunctionArg ) )
       : eoEvalFunc<EOT>(), evalFunc( _eval )
@@ -56,7 +56,7 @@ struct peoEvalFunc: public eoEvalFunc<EOT>
 
 private:
   FitT (* evalFunc )( FunctionArg );
-  };
+};
 
 #endif
 

trunk/paradiseo-peo/src/peoNoAggEvalFunc.h

@@ -45,13 +45,13 @@
 //! The class is provided as a mean of declaring that no aggregation is required for the evaluation function - the fitness
 //! value is explicitly specified.
 template< class EOT > class peoNoAggEvalFunc : public peoAggEvalFunc< EOT >
-  {
+{
 
-  public :
+public :
 
   //! Operator which sets as fitness the <b>__fit</b> value for the <b>__sol</b> individual
   void operator()( EOT& __sol, const typename EOT :: Fitness& __fit );
-  };
+};
 
 
 template< class EOT > void peoNoAggEvalFunc< EOT > :: operator()( EOT& __sol, const typename EOT :: Fitness& __fit )

trunk/paradiseo-peo/src/peoParaSGATransform.h

@@ -47,9 +47,9 @@ extern int getNodeRank();
 
 
 template< class EOT > class peoParaSGATransform : public peoTransform< EOT >
-  {
+{
 
-  public:
+public:
 
   using peoTransform< EOT > :: requestResourceRequest;
   using peoTransform< EOT > :: resume;
@@ -79,7 +79,7 @@ template< class EOT > class peoParaSGATransform : public peoTransform< EOT >
   void notifySendingData();
   void notifySendingAllResourceRequests();
 
-  private:
+private:
 
   eoQuadOp< EOT >& cross;
   double cross_rate;
@@ -94,7 +94,7 @@ template< class EOT > class peoParaSGATransform : public peoTransform< EOT >
   EOT father, mother;
 
   unsigned num_term;
-  };
+};
 
 template< class EOT > peoParaSGATransform< EOT > :: peoParaSGATransform(
 
@@ -167,7 +167,7 @@ template< class EOT > void peoParaSGATransform< EOT > :: unpackResult()
 template< class EOT > void peoParaSGATransform< EOT > :: operator()( eoPop < EOT >& __pop )
 {
 
-  printDebugMessage( "performing the parallel transformation step." );
+  printDebugMessage( "peoParaSGATransform: performing the parallel transformation step." );
   pop = &__pop;
   idx = 0;
   num_term = 0;

trunk/paradiseo-peo/src/peoPopEval.h

@@ -45,13 +45,12 @@
 //! The derived classes may be used as wrappers for <b>EO</b>-derived evaluation functors. In order to have an example,
 //! please refer to the implementation of the <b>peoSeqPopEval</b> and <b>peoParaPopEval</b> classes.
 template< class EOT > class peoPopEval : public Service
-  {
+{
 
-  public:
+public:
 
   //! Interface function providing the signature for constructing an evaluation functor.
   virtual void operator()( eoPop< EOT >& __pop ) = 0;
-  };
-
+};
 
 #endif

trunk/paradiseo-peo/src/peoSyncIslandMig.h

@@ -144,9 +144,9 @@
 //! the associated distinctly parametrized migration objects. The interconnecting element is the underlying topology, defined at step 1
 //! (the same C++ migTopology object has to be passed as parameter for all the migration objects, in order to interconnect them).
 template< class EOT > class peoSyncIslandMig : public Cooperative, public eoUpdater
-  {
+{
 
-  public:
+public:
 
   //! Constructor for the peoSyncIslandMig class; the characteristics of the migration model are defined
   //! through the specified parameters - out of the box objects provided in EO, etc., or custom, derived objects may be passed as parameters.
@@ -181,13 +181,13 @@ template< class EOT > class peoSyncIslandMig : public Cooperative, public eoUpda
   void notifySending();
 
 
-  private:
+private:
 
   void emigrate();
   void immigrate();
 
 
-  private:
+private:
 
   eoPeriodicContinue< EOT > cont;
   eoSelect< EOT >& select; 		// selection strategy
@@ -205,7 +205,7 @@ template< class EOT > class peoSyncIslandMig : public Cooperative, public eoUpda
   std :: queue< Cooperative* > coop_em;
 
   sem_t sync;
-  };
+};
 
 
 template< class EOT > peoSyncIslandMig< EOT > :: peoSyncIslandMig(
@@ -268,7 +268,7 @@ template< class EOT > void peoSyncIslandMig< EOT > :: emigrate()
     em.push( mig );
     coop_em.push( out[ i ] );
     send( out[ i ] );
-      printDebugMessage( "sending some emigrants." );
+    printDebugMessage( "peoSyncIslandMig: sending some emigrants." );
   }
 }
 
@@ -282,7 +282,7 @@ template< class EOT > void peoSyncIslandMig< EOT > :: immigrate()
     assert( imm.size() );
     replace( destination, imm.front() ) ;
     imm.pop();
-    printDebugMessage( "receiving some immigrants." );
+    printDebugMessage( "peoSyncIslandMig: receiving some immigrants." );
   }
   unlock();
 }
@@ -317,11 +317,11 @@ template< class EOT > void peoSyncIslandMig< EOT > :: notifySending()
     if ( imm.empty() )
     {
 
-        printDebugMessage( "entering pasive mode\n" );
+      printDebugMessage( "peoSyncIslandMig: entering pasive mode\n" );
       getOwner()->setPassive();
     }
-  }
-  unlock();
+}
+unlock();
 
   resume();
 }

trunk/paradiseo-peo/src/peoSyncMultiStart.h

@@ -62,9 +62,9 @@ extern int getNodeRank();
 //! thus allowing for simple hybridization schemes which combine the evolutionary approach with a local search approach,
 //! for example, executed at the end of each generation.
 template< class EOT > class peoSyncMultiStart : public Service, public eoUpdater
-  {
+{
 
-  public:
+public:
 
   //! Constructor function - several simple parameters are required for defining the characteristics of the multi-start model.
   //!
@@ -114,7 +114,7 @@ template< class EOT > class peoSyncMultiStart : public Service, public eoUpdater
   //! and the processes that performs the actual execution phase. There is no need to explicitly call the function.
   void notifySendingAllResourceRequests();
 
-  private:
+private:
 
   eoContinue< EOT >& cont;
   eoSelect< EOT >& select;
@@ -129,7 +129,7 @@ template< class EOT > class peoSyncMultiStart : public Service, public eoUpdater
   EOT sol;
   unsigned idx;
   unsigned num_term;
-  };
+};
 
 
 template< class EOT > peoSyncMultiStart< EOT > :: peoSyncMultiStart(

trunk/paradiseo-peo/src/rmc/mpi/comm.cpp

@@ -51,6 +51,7 @@ static sem_t sem_comm_init;
 
 static Communicator * the_thread;
 
+
 Communicator :: Communicator (int * __argc, char * * * __argv) {
 
   the_thread = this;  
@@ -69,23 +70,28 @@ void Communicator :: start () {
 
     sendMessages ();
 
-    if (theEnd() || ! atLeastOneActiveRunner ())     
+    if (! atLeastOneActiveRunner () && ! atLeastOneActiveThread() && allResourcesFree ())
       break;
 
     receiveMessages ();
   }
 
   waitBuffers ();
-  sem_destroy(& sem_comm_init);
-
   printDebugMessage ("finalizing");
 
-  synchronizeNodes ();
+  //synchronizeNodes ();
 }
 
 void initCommunication () {
 
+  static bool initializedSemaphore = false;
+
+  if (initializedSemaphore) {
+    sem_destroy(& sem_comm_init);
+  }
+
   sem_init (& sem_comm_init, 0, 0);
+  initializedSemaphore = true;
 }
 
 void waitNodeInitialization () {
@@ -97,6 +103,3 @@ void wakeUpCommunicator () {
 
   the_thread -> wakeUp ();
 }
-
-
-

trunk/paradiseo-peo/src/rmc/mpi/mess.cpp

@@ -45,18 +45,26 @@
 	
 static char mpi_buf [MPI_BUF_SIZE];
 	
-static int pos_buf ;
+static int pos_buf;
 
 static std :: vector <char *> act_buf; /* Active buffers */
 
 static std :: vector <MPI_Request *> act_req; /* Active requests */
 
+void initBuffers () {
+
+  pos_buf = 0;
+  act_buf.clear ();
+  act_req.clear ();
+}
+
 void cleanBuffers () {
 
   for (unsigned i = 0; i < act_req.size ();) {
 
     MPI_Status stat ;
     int flag ;
+
     MPI_Test (act_req [i], & flag, & stat) ;
     if (flag) {
 
@@ -267,4 +275,3 @@ void unpack (char * __str) {
   MPI_Unpack (mpi_buf, MPI_BUF_SIZE, & pos_buf, & len, 1, MPI_INT, MPI_COMM_WORLD);
   MPI_Unpack (mpi_buf, MPI_BUF_SIZE, & pos_buf, __str, len, MPI_CHAR, MPI_COMM_WORLD);    
 }
-

trunk/paradiseo-peo/src/rmc/mpi/mess.h

@@ -47,6 +47,8 @@ extern void sendMessageToAll (int __tag);
 
 extern void receiveMessage (int __from, int __tag);
 
+extern void initBuffers ();
+
 extern void cleanBuffers ();
 
 extern void waitBuffers ();

trunk/paradiseo-peo/src/rmc/mpi/node.cpp

@@ -40,6 +40,8 @@
 #include <string>
 #include <cassert>
 
+#include "mess.h"
+
 
 class MPIThreadedEnv {
 
@@ -63,7 +65,7 @@ public:
 
 private:
 
-  /* No instance of this class can be created outside its domain */
+  /* No instance of this class can be created outside its domain! */
   MPIThreadedEnv ( int * __argc, char * * * __argv ) {
 
     static bool MPIThreadedEnvInitialized = false;
@@ -72,6 +74,7 @@ private:
     if (! MPIThreadedEnvInitialized) {
 
       MPI_Init_thread (__argc, __argv, MPI_THREAD_FUNNELED, & provided);  
+
       assert (provided == MPI_THREAD_FUNNELED); /* The MPI implementation must be multi-threaded.
 					       Yet, only one thread performs the comm.
 					       operations */
@@ -92,6 +95,7 @@ static std :: map <std :: string, int> name_to_rk;
 
 static std :: vector <std :: string> rk_to_name;
 
+
 int getNodeRank () {
 
   return rk;
@@ -102,6 +106,11 @@ int getNumberOfNodes () {
   return sz;
 }
 
+void collectiveCountOfRunners ( unsigned int* num_local_exec_runners, unsigned int* num_exec_runners ) {
+
+  MPI_Allreduce( num_local_exec_runners, num_exec_runners, 1, MPI_UNSIGNED, MPI_SUM, MPI_COMM_WORLD );
+}
+
 int getRankFromName (const std :: string & __name) {
 
   return atoi (__name.c_str ());  
@@ -112,9 +121,8 @@ void initNode (int * __argc, char * * * __argv) {
   rk_to_name.clear ();
   name_to_rk.clear ();
 
-
   MPIThreadedEnv :: init ( __argc, __argv );
-
+  //synchronizeNodes();
 
   MPI_Comm_rank (MPI_COMM_WORLD, & rk);   /* Who ? */
   MPI_Comm_size (MPI_COMM_WORLD, & sz);    /* How many ? */

trunk/paradiseo-peo/src/rmc/mpi/node.h

@@ -44,6 +44,8 @@ extern int getNodeRank (); /* It gives the rank of the calling process */
 
 extern int getNumberOfNodes (); /* It gives the size of the environment (Total number of nodes) */
 
+extern void collectiveCountOfRunners ( unsigned int* num_local_exec_runners, unsigned int* num_exec_runners );
+
 extern int getRankFromName (const std :: string & __name); /* It gives the rank of the process
 							      expressed by its name */
 

trunk/paradiseo-peo/src/rmc/mpi/recv.cpp

@@ -130,7 +130,5 @@ void receiveMessages () {
       };
     }
 
-  } while ( ! atLeastOneActiveThread () && atLeastOneActiveRunner () /*&& ! allResourcesFree ()*/);
-
-  cleanBuffers ();
+  } while ( ! atLeastOneActiveThread () && atLeastOneActiveRunner () /*&& ! allResourcesFree ()*/ );
 }

trunk/paradiseo-peo/src/rmc/mpi/rmc.cpp

@@ -45,6 +45,7 @@ static std :: vector <pthread_t *> ll_threads; /* Low level threads */
 static std :: vector <Worker *> worker_threads; /* Worker threads */
 static Communicator* communicator_thread = NULL; /* Communicator thread */
 
+
 void runRMC () {
 
   /* Worker(s) ? */

trunk/paradiseo-peo/src/rmc/mpi/scheduler.cpp

@@ -47,6 +47,8 @@ static std :: queue <SCHED_REQUEST> requests; /* Requests */
 
 static unsigned initNumberOfRes = 0;
 
+extern void wakeUpCommunicator();
+
 void initScheduler () {
 
   resources = std :: queue <SCHED_RESOURCE> ();
@@ -65,10 +67,13 @@ void initScheduler () {
 }
 
 bool allResourcesFree () {
-
   return resources.size () == initNumberOfRes;
 }
 
+unsigned numResourcesFree () {
+  return resources.size ();
+}
+
 static void update () {
 
   unsigned num_alloc = std :: min (resources.size (), requests.size ());
@@ -107,4 +112,5 @@ void unpackTaskDone () {
   if (resources.size () == initNumberOfRes)
     printDebugMessage ("all the resources are now free.");
   update ();
+  wakeUpCommunicator();
 }

trunk/paradiseo-peo/src/rmc/mpi/scheduler.h

@@ -57,4 +57,6 @@ extern void unpackTaskDone ();
 
 extern bool allResourcesFree ();
 
+extern unsigned numResourcesFree ();
+
 #endif

trunk/paradiseo-peo/src/rmc/mpi/send.cpp

@@ -49,6 +49,7 @@
 
 #define TO_ALL -1
 
+
 typedef struct {
 
   Communicable * comm;
@@ -57,27 +58,27 @@ typedef struct {
 
 } SEND_REQUEST;
 
+
 static std :: queue <SEND_REQUEST> mess;
 
 static sem_t sem_send;
 
 static bool contextInitialized = false;
 
+
 void initSending () {
 
-  static bool initializedSem = false;
+  static bool initializedSemaphore = false;
 
   mess = std :: queue <SEND_REQUEST> ();
 
-  if (! initializedSem) {
-    sem_init (& sem_send, 0, 1);
-    initializedSem = true;
-  }
-  else {
+  if (initializedSemaphore) {
     sem_destroy(& sem_send);
-    sem_init (& sem_send, 0, 1);
   }
 
+  sem_init (& sem_send, 0, 1);
+  initializedSemaphore = true;
+
   contextInitialized = false;
 }
 
@@ -103,13 +104,13 @@ extern void initializeContext ();
 
 void sendMessages () {
 
-  sem_wait (& sem_send);
-
   if (! contextInitialized) {
     contextInitialized = true;
     initializeContext();
   }
 
+  sem_wait (& sem_send);
+
   while (! mess.empty ()) {
 
     SEND_REQUEST req = mess.front ();

trunk/paradiseo-peo/src/rmc/mpi/tags.h

@@ -48,6 +48,4 @@
 #define TASK_RESULT_TAG 19
 #define TASK_DONE_TAG 20
 
-#define EXECUTION_CONTEXT_TAG 1000
-
 #endif

trunk/paradiseo-peo/src/rmc/mpi/worker.cpp

@@ -46,6 +46,8 @@
 
 static std :: vector <Worker *> key_to_worker (1); /* Vector of registered workers */
 
+extern void wakeUpCommunicator ();
+
 Worker * getWorker (WORKER_ID __key) {
 
   return key_to_worker [__key];
@@ -54,8 +56,11 @@ Worker * getWorker (WORKER_ID __key) {
 Worker :: Worker () {
 
   recvAndCompleted = false;
+  taskAssigned = 0;
   id = key_to_worker.size ();
   key_to_worker.push_back (this);
+
+  sem_init( &sem_task_done, 0, 0 );
 }
 
 void Worker :: packResult () {
@@ -66,6 +71,7 @@ void Worker :: packResult () {
 
 void Worker :: unpackData () {
 
+  taskAssigned ++;
   printDebugMessage ("unpacking the ID. of the service.");
   unpack (serv_id);
   serv = getService (serv_id); 
@@ -90,6 +96,7 @@ void Worker :: notifySendingResult () {
 
 void Worker :: notifySendingTaskDone () {
 
+  sem_post(&sem_task_done);
   setPassive ();
 }
 
@@ -104,20 +111,26 @@ void Worker :: start () {
 
     sleep ();
 
-    if (! atLeastOneActiveRunner ())
+    if (! atLeastOneActiveRunner () && ! taskAssigned)
       break;
 
     if (recvAndCompleted) {
       send (this, my_node -> rk_sched, TASK_DONE_TAG);  
       recvAndCompleted = false;
+      sem_wait(&sem_task_done);
+      taskAssigned --;
     }
     else {
 
-      printDebugMessage ("executing the task.");
       serv -> execute ();
       send (this, src, TASK_RESULT_TAG);
     }
   }
+
+  printDebugMessage ("Worker finished execution.");
+  setPassive ();
+
+  wakeUpCommunicator();
 }
 
 void initWorkersEnv () {

trunk/paradiseo-peo/src/rmc/mpi/worker.h

@@ -72,6 +72,10 @@ private :
   int src;
 
   bool recvAndCompleted;
+  unsigned taskAssigned;
+
+  sem_t sem_task_done;
+  sem_t sem_task_asgn;
 };
 
 extern void initWorkersEnv ();

trunk/paradiseo-peo/src/rmc/mpi/xml_parser.cpp

@@ -99,4 +99,3 @@ std :: string getNextNode () {
 
   return str;
 }
-