Gabriele Cosmo
158 lines
4.8 KiB
C++
158 lines
4.8 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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//
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//
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// ------------------------------------------------------------
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// GEANT 4 class header file
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//
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// Class Description:
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//
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// Create and hold a pointer to Workspace.
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// This class holds a thread-private static instance
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// of the template parameter workspace.
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//
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// The concrete implementation of workspace objects
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// are responsible for instantiating a singleton instance
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// of this pool.
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//
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// Recycling of this pool can enable reuse among different
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// threads in task-based - or 'on-demand' - simulation.
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// ------------------------------------------------------------
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#ifndef G4TWORKSPACEPOOL_HH
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#define G4TWORKSPACEPOOL_HH
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#include "tls.hh"
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#include "globals.hh"
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template<class T>
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class G4TWorkspacePool
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{
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public:
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inline T* CreateWorkspace();
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// For use with simple MT mode - each thread gets a workspace
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// and uses it until end
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inline void CreateAndUseWorkspace();
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// Create it (as above) and use it
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inline T* FindOrCreateWorkspace();
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// For use with 'dynamic' model of threading - workspaces can be recycled
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// Reuse an existing workspace - or create a new one if needed.
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// This will never fail, except if system is out of resources
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inline T* GetWorkspace() { return fMyWorkspace; }
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// Give back the existing, active workspace for my thread / task
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inline void Recycle( T * myWrkSpace );
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// Keep the unused Workspace - for recycling
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inline void CleanUpAndDestroyAllWorkspaces();
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// To be called once at the end of the job
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public:
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G4TWorkspacePool() {}
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~G4TWorkspacePool() {}
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private:
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static G4ThreadLocal T* fMyWorkspace;
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// The thread's workspace - if assigned
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};
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template<typename T> G4ThreadLocal T* G4TWorkspacePool<T>::fMyWorkspace=0;
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template<class T>
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T* G4TWorkspacePool<T>::CreateWorkspace()
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{
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T* wrk = 0;
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if ( !fMyWorkspace )
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{
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wrk = new T;
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if ( !wrk )
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{
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G4Exception("G4TWorspacePool<someType>::CreateWorkspace",
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"MemoryError", FatalException,
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"Failed to create workspace.");
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}
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else
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{
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fMyWorkspace = wrk;
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}
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}
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else
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{
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G4Exception("ParticlesWorspacePool::CreateWorkspace",
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"InvalidCondition", FatalException,
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"Cannot create workspace twice for the same thread.");
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wrk = fMyWorkspace;
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}
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return wrk;
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}
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template<class T>
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void G4TWorkspacePool<T>::CreateAndUseWorkspace()
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{
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(this->CreateWorkspace())->UseWorkspace();
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}
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template<class T>
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T* G4TWorkspacePool<T>::FindOrCreateWorkspace()
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{
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T* wrk= fMyWorkspace;
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if( !wrk )
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{
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wrk= this->CreateWorkspace();
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}
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wrk->UseWorkspace();
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fMyWorkspace= wrk; // assign it for use by this thread.
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return wrk;
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}
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template<class T>
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void G4TWorkspacePool<T>::Recycle( T * myWrkSpace )
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{
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myWrkSpace->ReleaseWorkspace();
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delete myWrkSpace;
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}
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template<class T>
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void G4TWorkspacePool<T>::CleanUpAndDestroyAllWorkspaces()
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{
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if (fMyWorkspace)
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{
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fMyWorkspace->DestroyWorkspace();
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delete fMyWorkspace;
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fMyWorkspace=0;
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}
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}
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#endif // G4TWORKSPACEPOOL_HH
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