//
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//
//
// ----------------------------------------------------------------------
// Class G4ImportanceAlgorithm
//
// Class description:
//
// An implementation of a G4VImportanceAlgorithm (see description in
// G4VImportanceAlgorithm.hh).

// Author: Michael Dressel (Michael.Dressel@cern.ch)
// ----------------------------------------------------------------------
#ifndef G4ImportanceAlgorithm_hh
#define G4ImportanceAlgorithm_hh G4ImportanceAlgorithm_hh

#include "G4VImportanceAlgorithm.hh"

class G4ImportanceAlgorithm : public G4VImportanceAlgorithm
{

public:  // with description

  G4ImportanceAlgorithm();
    // simple construction

  virtual ~G4ImportanceAlgorithm();
    // repeate warning if triggered

  virtual G4Nsplit_Weight Calculate(G4double ipre, 
				    G4double ipost, 
				    G4double init_w) const;
    // calculate the number of tracks and their weight according 
    // to the pre and post importance value and the weight of
    // the mother track.  
private:

  void Error(const G4String &m) const;
  void Warning(const G4String &m) const;

private:

  mutable G4bool fWorned;

#ifdef G4MULTITHREADED
  static G4Mutex ImportanceMutex;
#endif

};

#endif
