New style for PEO
git-svn-id: svn://scm.gforge.inria.fr/svnroot/paradiseo@789 331e1502-861f-0410-8da2-ba01fb791d7f
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/*
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/*
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* <peoSyncIslandMig.h>
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* Copyright (C) DOLPHIN Project-Team, INRIA Futurs, 2006-2007
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* (C) OPAC Team, LIFL, 2002-2007
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@ -63,7 +63,7 @@
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//! parameters, i.e. frequency of the migrations, selection and replacement strategies,
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//! a topological model and the source and destination population for the migrating individuals.
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//! The main difference as opposed to the asynchronous migration model is the synchronization step
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//! performed after selecting and sending the emigrant individuals.
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//! performed after selecting and sending the emigrant individuals.
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//!
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//! The migration operator is called at the end of each generation of an evolutionary algorithms
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//! as a checkpoint object - the following code exposes the structure of a classic evolutionary algorithm:
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@ -139,175 +139,189 @@
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//! islands requires the reiteration of the steps 2 through 4 for creating distinct algorithms, with distinct populations and
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//! the associated distinctly parametrized migration objects. The interconnecting element is the underlying topology, defined at step 1
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//! (the same C++ migTopology object has to be passed as parameter for all the migration objects, in order to interconnect them).
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template< class EOT > class peoSyncIslandMig : public Cooperative, public eoUpdater {
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template< class EOT > class peoSyncIslandMig : public Cooperative, public eoUpdater
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{
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public:
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public:
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//! Constructor for the peoSyncIslandMig class; the characteristics of the migration model are defined
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//! through the specified parameters - out of the box objects provided in EO, etc., or custom, derived objects may be passed as parameters.
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//!
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//! @param unsigned __frequency - frequency of the migrations - the migrations occur periodically;
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//! @param eoSelect< EOT >& __select - selection strategy to be applied for constructing a list of emigrant individuals out of the source population;
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//! @param eoReplacement< EOT >& __replace - replacement strategy used for integrating the immigrant individuals in the destination population;
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//! @param Topology& __topology - topological model to be followed when performing migrations;
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//! @param eoPop< EOT >& __source - source population from which the emigrant individuals are selected;
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//! @param eoPop< EOT >& __destination - destination population in which the immigrant population are integrated.
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peoSyncIslandMig(
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unsigned __frequency,
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eoSelect< EOT >& __select,
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eoReplacement< EOT >& __replace,
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Topology& __topology,
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eoPop< EOT >& __source,
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eoPop< EOT >& __destination
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);
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//! Constructor for the peoSyncIslandMig class; the characteristics of the migration model are defined
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//! through the specified parameters - out of the box objects provided in EO, etc., or custom, derived objects may be passed as parameters.
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//!
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//! @param unsigned __frequency - frequency of the migrations - the migrations occur periodically;
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//! @param eoSelect< EOT >& __select - selection strategy to be applied for constructing a list of emigrant individuals out of the source population;
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//! @param eoReplacement< EOT >& __replace - replacement strategy used for integrating the immigrant individuals in the destination population;
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//! @param Topology& __topology - topological model to be followed when performing migrations;
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//! @param eoPop< EOT >& __source - source population from which the emigrant individuals are selected;
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//! @param eoPop< EOT >& __destination - destination population in which the immigrant population are integrated.
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peoSyncIslandMig(
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unsigned __frequency,
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eoSelect< EOT >& __select,
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eoReplacement< EOT >& __replace,
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Topology& __topology,
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eoPop< EOT >& __source,
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eoPop< EOT >& __destination
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);
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//! Function operator to be called as checkpoint for performing the migration step. The emigrant individuals are selected
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//! from the source population and sent to the next island (defined by the topology object) while the immigrant
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//! individuals are integrated in the destination population. There is no need to explicitly call the function - the
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//! wrapper checkpoint object (please refer to the above example) will perform the call when required.
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void operator()();
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//! Function operator to be called as checkpoint for performing the migration step. The emigrant individuals are selected
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//! from the source population and sent to the next island (defined by the topology object) while the immigrant
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//! individuals are integrated in the destination population. There is no need to explicitly call the function - the
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//! wrapper checkpoint object (please refer to the above example) will perform the call when required.
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void operator()();
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//! Auxiliary function dealing with sending the emigrant individuals. There is no need to explicitly call the function.
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void pack();
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//! Auxiliary function dealing with receiving immigrant individuals. There is no need to explicitly call the function.
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void unpack();
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//! Auxiliary function dealing with sending the emigrant individuals. There is no need to explicitly call the function.
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void pack();
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//! Auxiliary function dealing with receiving immigrant individuals. There is no need to explicitly call the function.
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void unpack();
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//! Auxiliary function dealing with migration notifications. There is no need to explicitly call the function.
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void notifySending();
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//! Auxiliary function dealing with migration notifications. There is no need to explicitly call the function.
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void notifySending();
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private:
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private:
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void emigrate();
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void immigrate();
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void emigrate();
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void immigrate();
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private:
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private:
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eoPeriodicContinue< EOT > cont;
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eoSelect< EOT >& select; // selection strategy
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eoReplacement< EOT >& replace; // replacement strategy
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Topology& topology; // neighboring topology
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eoPeriodicContinue< EOT > cont;
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eoSelect< EOT >& select; // selection strategy
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eoReplacement< EOT >& replace; // replacement strategy
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Topology& topology; // neighboring topology
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// source and target populations
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eoPop< EOT >& source;
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eoPop< EOT >& destination;
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// source and target populations
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eoPop< EOT >& source;
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eoPop< EOT >& destination;
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// immigrants & emigrants in the queue
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std :: queue< eoPop< EOT > > imm;
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std :: queue< eoPop< EOT > > em;
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// immigrants & emigrants in the queue
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std :: queue< eoPop< EOT > > imm;
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std :: queue< eoPop< EOT > > em;
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std :: queue< Cooperative* > coop_em;
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std :: queue< Cooperative* > coop_em;
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sem_t sync;
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};
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sem_t sync;
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};
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template< class EOT > peoSyncIslandMig< EOT > :: peoSyncIslandMig(
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unsigned __frequency,
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eoSelect< EOT >& __select,
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eoReplacement< EOT >& __replace,
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Topology& __topology,
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eoPop< EOT >& __source,
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eoPop< EOT >& __destination
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unsigned __frequency,
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eoSelect< EOT >& __select,
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eoReplacement< EOT >& __replace,
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Topology& __topology,
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eoPop< EOT >& __source,
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eoPop< EOT >& __destination
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) : cont( __frequency ), select( __select ), replace( __replace ), topology( __topology ), source( __source ), destination( __destination )
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) : cont( __frequency ), select( __select ), replace( __replace ), topology( __topology ), source( __source ), destination( __destination )
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{
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__topology.add( *this );
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sem_init( &sync, 0, 0 );
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__topology.add( *this );
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sem_init( &sync, 0, 0 );
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}
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template< class EOT > void peoSyncIslandMig< EOT > :: pack() {
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template< class EOT > void peoSyncIslandMig< EOT > :: pack()
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{
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lock(); {
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lock ();
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{
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:: pack( coop_em.front()->getKey() );
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:: pack( em.front() );
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coop_em.pop();
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em.pop();
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}
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unlock();
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:: pack( coop_em.front()->getKey() );
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:: pack( em.front() );
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coop_em.pop();
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em.pop();
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}
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unlock();
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}
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template< class EOT > void peoSyncIslandMig< EOT > :: unpack() {
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template< class EOT > void peoSyncIslandMig< EOT > :: unpack()
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{
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lock(); {
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lock ();
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{
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eoPop< EOT > mig;
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:: unpack( mig );
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imm.push( mig );
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}
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unlock();
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eoPop< EOT > mig;
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:: unpack( mig );
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imm.push( mig );
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}
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unlock();
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sem_post( &sync );
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sem_post( &sync );
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}
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template< class EOT > void peoSyncIslandMig< EOT > :: emigrate() {
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template< class EOT > void peoSyncIslandMig< EOT > :: emigrate()
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{
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std :: vector< Cooperative* > in, out;
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topology.setNeighbors( this, in, out );
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for ( unsigned i = 0; i < out.size(); i ++ ) {
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std :: vector< Cooperative* > in, out;
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topology.setNeighbors( this, in, out );
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eoPop< EOT > mig;
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select( source, mig );
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em.push( mig );
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coop_em.push( out[ i ] );
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send( out[ i ] );
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printDebugMessage( "sending some emigrants." );
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}
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for ( unsigned i = 0; i < out.size(); i ++ )
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{
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eoPop< EOT > mig;
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select( source, mig );
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em.push( mig );
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coop_em.push( out[ i ] );
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send( out[ i ] );
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printDebugMessage( "sending some emigrants." );
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}
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}
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template< class EOT > void peoSyncIslandMig< EOT > :: immigrate() {
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template< class EOT > void peoSyncIslandMig< EOT > :: immigrate()
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{
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lock(); {
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lock ();
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{
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assert( imm.size() );
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replace( destination, imm.front() ) ;
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imm.pop();
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printDebugMessage( "receiving some immigrants." );
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}
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unlock();
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assert( imm.size() );
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replace( destination, imm.front() ) ;
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imm.pop();
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printDebugMessage( "receiving some immigrants." );
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}
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unlock();
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}
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template< class EOT > void peoSyncIslandMig< EOT > :: operator()() {
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template< class EOT > void peoSyncIslandMig< EOT > :: operator()()
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{
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if ( !cont( source ) ) {
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// sending emigrants
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emigrate();
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stop();
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if ( !cont( source ) )
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{
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// synchronizing
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sem_wait( &sync );
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getOwner()->setActive();
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// sending emigrants
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emigrate();
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stop();
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// receiving immigrants
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immigrate();
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}
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// synchronizing
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sem_wait( &sync );
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getOwner()->setActive();
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// receiving immigrants
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immigrate();
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}
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}
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template< class EOT > void peoSyncIslandMig< EOT > :: notifySending() {
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template< class EOT > void peoSyncIslandMig< EOT > :: notifySending()
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{
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lock(); {
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lock ();
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{
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if ( imm.empty() ) {
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if ( imm.empty() )
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{
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printDebugMessage( "entering pasive mode\n" );
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getOwner()->setPassive();
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}
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}
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unlock();
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printDebugMessage( "entering pasive mode\n" );
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getOwner()->setPassive();
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}
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}
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unlock();
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resume();
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resume();
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}
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