Gabriele Cosmo
85 lines
3.4 KiB
C++
85 lines
3.4 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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// $Id: ParRandomState.hh,v 1.1 2002/03/05 15:22:13 gcosmo Exp $
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// GEANT4 tag $Name: geant4-05-00 $
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//
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// --------------------------------------------------------------------
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// Parallel Library for Geant4
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//
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// Gene Cooperman <gene@ccs.neu.edu>, 2001
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// --------------------------------------------------------------------
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// Each of the three members below must be modified for the application.
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// This default version simply sets the random seed on the slave using
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// the eventID.
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// --------------------------------------------------------------------
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#ifndef ParRandomState_h
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#define ParRandomState_h 1
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#include "ParMarshaledObj.hh"
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class ParMarshaledRandomState : public MarshaledObj
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{
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public:
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// If 0, GetNextRandomStateForSlave not called.
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static const int RANDOM_STATE_SIZE = sizeof(long);
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// Called on master
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inline void *GetNextRandomStateForSlave()
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{ static long * nextSeed = new long;
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*nextSeed = (long) (100000000L * HepRandom::getTheGenerator()->flat());
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#ifdef TOPC_DEBUG
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G4cout << "GET SEED: " << *nextSeed << G4endl;
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#endif
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return nextSeed;
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}
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// Called on slave at beginning of new event.
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inline void SetNextRandomStateForSlave( G4int eventID, void *randomState )
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{ HepRandom::setTheSeed( *(long *)randomState );
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#ifdef TOPC_DEBUG
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G4cout << "SET SEED: " << *(long *)randomState << G4endl;
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#endif
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}
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public:
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// The constructors do not need to be modified.
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inline ParMarshaledRandomState( G4int eventID )
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: MarshaledObj(RANDOM_STATE_SIZE+sizeof(int)+sizeof(G4int))
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{ Marshal(eventID);
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Marshal( GetNextRandomStateForSlave(), RANDOM_STATE_SIZE );
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}
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inline ParMarshaledRandomState( void *buf )
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: MarshaledObj(buf)
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// MarshaledObj() called with buf and 0 size, creates object for unmarshaling
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{ }
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inline void unmarshalEventIDandSetState( G4int & eventID )
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{ Unmarshal(eventID);
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// SharedObjPtr is pointer to random state.
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SetNextRandomStateForSlave( eventID, UnmarshalAsSharedObjPtr() );
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}
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};
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#endif
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