Import Geant4 10.0.0 source tree

2016-06-10 11:51:14 +02:00
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+//
+// ********************************************************************
+// * 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.          *
+// ********************************************************************
+//
+
+//   Create, recycle and Workspaces
+//  Only one object of this type exists - it is a true Singleton (not per thread).
+
+#ifndef G4GEOMETRYWORKSPACEPOOL_HH
+#define G4GEOMETRYWORKSPACEPOOL_HH
+
+class G4GeometryWorkspace;
+// #include "G4GeometryWorkspace.hh"
+
+//Note: Investigate potential to make it a template - on the workspace type
+
+class G4GeometryWorkspacePool
+{
+  public: 
+     static G4GeometryWorkspacePool* GetInstance();
+
+   // For use with simple MT mode - each thread gets a workspace and uses it until end
+     G4GeometryWorkspace* CreateWorkspace();
+
+     void CreateAndUseWorkspace();  // Create it (as above) and use it
+  
+   // For use with 'dynamic' model of threading - workspaces can be recycled
+     G4GeometryWorkspace* FindOrCreateWorkspace();
+      // Reuse an existing workspace - or create a new one if needed.
+      // This will never fail, except if system is out of resources
+
+     inline G4GeometryWorkspace* GetWorkspace() { return fMyWorkspace; } 
+      // Give back the existing, active workspace for my thread / task
+
+     void Recycle( G4GeometryWorkspace * );
+      // Keep the unused Workspace - for recycling
+
+     void CleanUpAndDestroyAllWorkspaces();
+     // To be called once at the end of the job
+  
+ protected:
+      void ReleaseAndDestroyWorkspace(G4GeometryWorkspace*);
+      // Destroy workspace - after releasing it
+
+      // void RegisterWarehouse( G4GeometryWarehouse *) ;
+      // The (optional) warehouse keeps a list of free workspaces
+
+ private:
+      G4GeometryWorkspacePool();
+     ~G4GeometryWorkspacePool();
+
+ private: 
+     static G4GeometryWorkspacePool* thePool;
+
+     //void* fWarehouse;
+     // G4GeometryWarehouse* fWarehouse;
+     // This is "void" to hide the actual container type for workspaces
+     // Implementations: a simple STL contaier for MT or something better for tbb
+     // Further development: template parameter with portable default
+
+     static G4ThreadLocal G4GeometryWorkspace*    fMyWorkspace;
+     // The thread's workspace - if assigned.
+     //  --> Can we do without this ?  It is dirty!!
+};
+
+#endif //G4GEOMETRYWORKSPACEPOOL_HH