DG>struct Const
DG>{
DG>  Const():p(new int()){*p = 0;}
DG>  void Increment() const {*p++;}
DG>  void Decrement() const {*p--;}
DG>  ~Const(){delete p;}
DG>  int * p;
DG>};

DG>const Const cnst;

DG>void Thread ()
DG>{
DG>  cnst.Increment(); 
DG>  cnst.Decrement();
DG>}

DG>