ReferenceCounted.h

// -*- C++ -*-
//
// ReferenceCounted.h is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2007 Leif Lonnblad
//
// ThePEG is licenced under version 2 of the GPL, see COPYING for details.
// Please respect the MCnet academic guidelines, see GUIDELINES for details.
//
#ifndef ThePEG_ReferenceCounted_H
#define ThePEG_ReferenceCounted_H
// This is the declaration of the ReferenceCounted class.


#include "RCPtr.fh"
#include "ThePEG/Persistency/PersistentIStream.fh"

namespace ThePEG {
namespace Pointer {

class ReferenceCounted {

  friend class RCPtrBase;
  friend class ThePEG::PersistentIStream;

public:

  typedef unsigned int CounterType;

protected:

  ReferenceCounted() 
    : uniqueId(++objectCounter), 
      theReferenceCounter(CounterType(1)) {}

  ReferenceCounted(const ReferenceCounted &)
    : uniqueId(++objectCounter), 
      theReferenceCounter(CounterType(1)) {}

  ReferenceCounted & operator=(const ReferenceCounted &)
  {
    return *this;
  }
    

public:

  CounterType referenceCount() const 
  { 
    return theReferenceCounter; 
  }

private:

  void incrementReferenceCount() const 
  { 
    ++theReferenceCounter; 
  }

  bool decrementReferenceCount() const 
  {
    return !--theReferenceCounter;
  }

public:

  const unsigned long uniqueId;

private:

  static unsigned long objectCounter;

  mutable CounterType theReferenceCounter;

};


}
}

#endif /* ThePEG_ReferenceCounted_H */

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