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//
// $Id$
//
//
// class desccription:
//
// This class is exclusively used by G4HEPEvtInterface.
// It represents one particle in /HEPEVT/ list.

#ifndef G4HEPEvtParticle_h
#define G4HEPEvtParticle_h 1

#include "globals.hh"
#include "evtdefs.hh"
#include "G4Allocator.hh"
#include "G4PrimaryParticle.hh"

class G4HEPEvtParticle 
{
  public:
      inline void *operator new(size_t);
      inline void operator delete(void *aStackedTrack);

      G4HEPEvtParticle();
      G4HEPEvtParticle(G4PrimaryParticle* pp,
                       G4int isthep, G4int jdahep1, G4int jdahep2);
      ~G4HEPEvtParticle();

      G4HEPEvtParticle & operator=(const G4HEPEvtParticle &right);
      G4int operator==(const G4HEPEvtParticle &right) const;
      G4int operator!=(const G4HEPEvtParticle &right) const;

  private:
      G4PrimaryParticle * theParticle;
      G4int ISTHEP; // Status code of the entry
                    // Set to be 0 after generating links of
                    // G4PrimaryParticle object
      G4int JDAHEP1;
      G4int JDAHEP2;

  public:
      inline G4PrimaryParticle * GetTheParticle()
      { return theParticle; }
      inline void Done()
      { ISTHEP *= -1; }
      inline G4int GetISTHEP()
      { return ISTHEP; }
      inline G4int GetJDAHEP1()
      { return JDAHEP1; }
      inline G4int GetJDAHEP2()
      { return JDAHEP2; }
};

extern G4EVENT_DLL G4ThreadLocal G4Allocator<G4HEPEvtParticle> *aHEPEvtParticleAllocator;

inline void * G4HEPEvtParticle::operator new(size_t)
{
  if (!aHEPEvtParticleAllocator)
    aHEPEvtParticleAllocator = new G4Allocator<G4HEPEvtParticle>;
  return (void *) aHEPEvtParticleAllocator->MallocSingle();
}

inline void G4HEPEvtParticle::operator delete(void * aHEPEvtParticle)
{
  aHEPEvtParticleAllocator->FreeSingle((G4HEPEvtParticle *) aHEPEvtParticle);
}

#endif

