ReferenceCounted.h

// -*- C++ -*-
//
// ReferenceCounted.h is a part of ThePEG - Toolkit for HEP Event Generation
// Copyright (C) 1999-2019 Leif Lonnblad
//
// ThePEG is licenced under version 3 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 */