SGRX - handle for refcounted objects

template< class T >
struct Handle
{
    typedef T subtype;
    T* item;

    Handle() : item( NULL ){}
    Handle( T* v ) : item( v ){ if( item ) item->Acquire(); }
    Handle( const Handle& h ) : item( h.item ){ if( item ) item->Acquire(); }
    ~Handle(){ if( item ){ item->Release(); item = NULL; } }
    Handle& operator = ( const Handle& h ){ if( item ) item->Release(); item = h.item; if( item ) item->Acquire(); return *this; }
    T* operator -> () const { return item; }
    T& operator * () const { return *item; }
    operator T* () const { return item; }
};