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//
// G4VGlobalFastSimulationManager
//
// Class description:
//
// Abstract interface for Global Fast Simulation Manager
// G4GlobalFastSimulationManager is a "Singleton".
// This class is an abstract interface for G4GlobalFastSimulationManager.
// It has the public access function GetConcreteInstance(), which is used
// to obtain a pointer to the concrete G4GlobalFastSimulationManager, should
// it exist. Then:
//
// G4VGlobalFastSimulationManager* pVFSMan =
//     G4VGlobalFastSimulationManager::GetConcreteInstance ();
//
// 'pVFSMan' points to the real (concrete) G4GlobalFastSimulationManager if
// at least a parameterisation envelope exists, otherwise is null.
//
// Thus all code must be protected, for example by:
//  if (pVFSMan)
//    G4FlavoredParallelWorld* = pVFSMan -> GetFlavoredWorldForThis(p);

// Authors: P. Mora de Freitas & M. Verderi, 14 April 1999
// --------------------------------------------------------------------
#ifndef G4VGLOBALFASTSIMULATIONMANAGER_HH
#define G4VGLOBALFASTSIMULATIONMANAGER_HH 1

#include "G4Types.hh"
#include "icomsdefs.hh"

class G4VFlavoredParallelWorld;
class G4ParticleDefinition;

class G4VGlobalFastSimulationManager
{
  public:

    static G4VGlobalFastSimulationManager* GetConcreteInstance();
      // Returns pointer to the actual Global Fast Simulation manager if
      // at least a parameterisation envelope exists

    virtual ~G4VGlobalFastSimulationManager() {}

    virtual G4VFlavoredParallelWorld* GetFlavoredWorldForThis(
                                                     G4ParticleDefinition*) = 0;
      // VGlobalFastSimulationManager interface for visualisation

  protected:

    static void SetConcreteInstance(G4VGlobalFastSimulationManager*);
      // Sets the pointer to the actual Global Fast Simulation manager

    G4ICOMS_DLL
    static G4ThreadLocal G4VGlobalFastSimulationManager* fpConcreteInstance;
      // Pointer to real G4GlobalFastSimulationManager
};

#endif