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//
//
//  25 Feb 2013: Andrea Dotti, first implementation
//
// class description:
//
//      This class is used for multi-threaded Geant4.
//      The object of this class can be set to G4MTRunManager, but not to G4RunManager.
//      G4UserWorkerInitialization class has five virtual methods as the user hooks
//      which are invoked at several occasions of the life cycle of each thread.
//
//      - virtual void WorkerInitialize() const
//       This method is called after the tread is created but before the G4WorkerRunManager
//       is instantiated.
//      - virtual void WorkerStart() const
//       This method is called once at the beginning of simulation job when kernel
//       classes and user action classes have already instantiated but geometry and
//       physics have not been yet initialized. This situation is identical to
//       "PreInit" state in the sequential mode.
//      - virtual void WorkerRunStart() const
//       This method is called before an event loop. Geometry and physics have already
//       been set up for the thread. All threads are synchronized and ready to start
//       the local event loop. This situation is identical to "Idle" state in the sequential mode.
//      - virtual void WorkerRunEnd() const
//       This method is called for each thread when the local event loop is done, but
//       before the synchronization over threads.
//      - virtual void WorkerStop() const
//       This method is called once at the end of simulation job.
//
//      Note: This object should be instantiated only once and set to G4MTRunManager,
//       while these five methods are invoked for each worker thread. Thus, to store
//       thread-local objects, use G4ThreadLocal keyword.
//

#ifndef G4UserWorkerInitialization_hh
#define G4UserWorkerInitialization_hh

class G4UserWorkerInitialization {
public: // with description
    G4UserWorkerInitialization();
    virtual ~G4UserWorkerInitialization();

    virtual void WorkerInitialize() const;
    // This method is called after the tread is created but before the
    // G4WorkerRunManager is instantiated.

    virtual void WorkerStart() const;
    // This method is called once at the beginning of simulation job
    // when kernel classes and user action classes have already instantiated
    // but geometry and physics have not been yet initialized. This situation
    // is identical to "PreInit" state in the sequential mode.

    virtual void WorkerRunStart() const;
    // This method is called before an event loop. Geometry and physics have
    // already been set up for the thread. All threads are synchronized and
    // ready to start the local event loop. This situation is identical to
    // "Idle" state in the sequential mode.

    virtual void WorkerRunEnd() const;
    // This method is called for each thread, when the local event loop has
    // finished but before the synchronization over threads.

    virtual void WorkerStop() const;
    // This method is called once at the end of simulation job. 
    // Implement here a clean up action.
 
};
    
#endif //G4UserWorkerInitialization_hh

