//A class can delegate the maintenance of its reference count to its 
//base class 'ReferenceCounter'. Once the reference count drop to zero
//the class object can be deleted. Here you can see: delete this ;
class ReferenceCounter
{
private: int m_refCounter ;
public:
    ReferenceCounter( ) : m_refCounter ( 0 ) { }  
    void AddRef( ) { m_refCounter++ ; } 
    void Release( ) { 
        if ( m_refCounter == 0 ) { return ; } 
        if ( --m_refCounter == 0 ) { delete this ; } 
    }
} ;

class MyClass : public ReferenceCounter
{
public : MyClass( ) { AddRef( ) ; } 

public : MyClass * getInstance( ) { AddRef( ) ; return this; }
         void ReleaseInstance ( ) { Release( ) ; } 
} ;