G4UserWorkerThreadInitialization.hh

Go to the documentation of this file.

//
// ********************************************************************
// * License and Disclaimer                                           *
// *                                                                  *
// * The  Geant4 software  is  copyright of the Copyright Holders  of *
// * the Geant4 Collaboration.  It is provided  under  the terms  and *
// * conditions of the Geant4 Software License,  included in the file *
// * LICENSE and available at  http://cern.ch/geant4/license .  These *
// * include a list of copyright holders.                             *
// *                                                                  *
// * Neither the authors of this software system, nor their employing *
// * institutes,nor the agencies providing financial support for this *
// * work  make  any representation or  warranty, express or implied, *
// * regarding  this  software system or assume any liability for its *
// * use.  Please see the license in the file  LICENSE  and URL above *
// * for the full disclaimer and the limitation of liability.         *
// *                                                                  *
// * This  code  implementation is the result of  the  scientific and *
// * technical work of the GEANT4 collaboration.                      *
// * By using,  copying,  modifying or  distributing the software (or *
// * any work based  on the software)  you  agree  to acknowledge its *
// * use  in  resulting  scientific  publications,  and indicate your *
// * acceptance of all terms of the Geant4 Software license.          *
// ********************************************************************
//
// G4UserWorkerThreadInitialization
//
// Class description:
//
// This class is used for multi-threading.
// It encapsulates the mechanism of starting/stopping threads.
 
// Author: M.Asai, A.Dotti (SLAC), 16 September 2013
// --------------------------------------------------------------------
#ifndef G4UserWorkerThreadInitialization_hh
#define G4UserWorkerThreadInitialization_hh 1
 
//class G4VUserPrimaryGeneratorAction;
//class G4UserRunAction;
//class G4UserEventAction;
//class G4UserStackingAction;
//class G4UserTrackingAction;
//class G4UserSteppingAction;
class G4WorkerThread;
class G4WorkerRunManager;
 
#include "G4Threading.hh"
#include "Randomize.hh"
 
class G4UserWorkerThreadInitialization
{
  public:
    G4UserWorkerThreadInitialization() = default;
    virtual ~G4UserWorkerThreadInitialization() = default;
 
    // Called by the kernel to create a new thread/worker and start work.
    // User should not re-implement this function (in derived class), except
    // only if he/she wants to rewrite the default threading model (see
    // StartThread() function).
    virtual G4Thread* CreateAndStartWorker(G4WorkerThread* workerThreadContext);
 
    // Called by worker threads to set the Random Number Generator Engine.
    // The default implementation "clones" the engine from the master thread
    // User needs to re-implement this method if using a non-standard
    // RNG Engine (i.e. a different one w.r.t. the one provided in the CLHEP
    // version supported by Geant4).
    // Important: this method is called by all threads at the same time;
    // it is user responsibilitiy to make it thread-safe.
    virtual void SetupRNGEngine(const CLHEP::HepRandomEngine* aRNGEngine) const;
 
    // Called by the kernel when threads need to be terminated. Implements
    // logic of joining the "aThread". Calling thread will wait for "aThread"
    // to end. Users should not re-implement this function (in derived class),
    // except only if he/she wants to rewrite the default threading model (see
    // StartThread() function).
    virtual void JoinWorker(G4Thread* aThread);
 
    // Called by StartThread() function to create a run-manager implementing
    // worker behvior. User should re-implement this function in a derived
    // class to instantiate his/her user-defined WorkerRunManager.
    // By default this method instantiates a G4WorkerRunManager object.
    virtual G4WorkerRunManager* CreateWorkerRunManager() const;
};
 
#endif