Gabriele Cosmo
116 lines
4.5 KiB
C++
116 lines
4.5 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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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. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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// G4PDefManager
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//
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// Class description:
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//
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// Utility template class for splitting read/write data for
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// thread-safety from classes: G4ParticleDefinition, G4VDecayChannel.
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//
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// The type G4PDefManager is introduced to encapsulate the methods used by
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// both the master thread and worker threads to allocate memory space for
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// the fields encapsulated by the class G4PDefData. When each thread
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// changes the value for these fields, it refers to them using a macro
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// definition defined below. For every G4ParticleDefinition instance,
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// there is a corresponding G4PDefData instance. All G4PDefData instances
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// are organized by the class G4PDefManager as an array.
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// The field "int g4particleDefinitionInstanceID" is added to the class
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// G4ParticleDefinition.
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// The value of this field in each G4ParticleDefinition instance is the
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// subscript of the corresponding G4PDefData instance.
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// In order to use the class G4PDefManager, we add a static member in the
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// class G4ParticleDefinition as follows:
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// "static G4PDefManager subInstanceManager".
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// Both the master thread and worker threads change the length of the array
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// for G4PDefData instances mutually along with G4ParticleDefinition
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// instances are created. For each worker thread, it dynamically creates ions.
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// Consider any thread A, if there is any other thread which creates an ion.
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// This ion is shared by the thread A. So the thread A leaves an empty space
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// in the array of G4PDefData instances for the ion.
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// Author: Xin Dong, 25.01.2009 - First implementation
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// from automatic MT conversion
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// --------------------------------------------------------------------
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#ifndef G4PDefManager_hh
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#define G4PDefManager_hh
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#include <stdlib.h>
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#include "globals.hh"
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#include "pwdefs.hh"
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#include "G4AutoLock.hh"
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class G4ProcessManager;
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class G4PDefData
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{
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// G4PDefData is the private data from the object to be split.
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// Encapsulates the fields of the class G4ParticleDefinition
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// that may not be read-only.
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public:
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void initialize();
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G4ProcessManager* theProcessManager = nullptr;
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};
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class G4PDefManager
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{
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public:
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G4PDefManager();
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G4int CreateSubInstance();
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// Invoked by the master or work thread to create a new subinstance
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// whenever a new split class instance is created. For each worker
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// thread, ions are created dynamically.
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void NewSubInstances();
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// Invoked by each worker thread to grow the subinstance array and
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// initialize each new subinstance using a particular method defined
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// by the subclass.
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void FreeSlave();
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// Invoked by all threads to free the subinstance array.
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G4PDefData* GetOffset();
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void UseWorkArea( G4PDefData* newOffset );
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G4PDefData* FreeWorkArea();
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G4PART_DLL static G4int& slavetotalspace(); // thread-local
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G4PART_DLL static G4PDefData*& offset(); // thread-local
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private:
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G4int totalobj;
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G4Mutex mutex;
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};
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#endif
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