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kdelibs'KSharedPtr (./kdelibs/kdecore/ksharedptr.h:95)

struct KSharedPtr
{
public:
  KSharedPtr()
    : ptr(0) { }
  KSharedPtr( T* t )
    : ptr(t) { if ( ptr ) ptr->_KShared_ref(); }
  KSharedPtr( const KSharedPtr& p )
    : ptr(p.ptr) { if ( ptr ) ptr->_KShared_ref(); }

  ~KSharedPtr() { if ( ptr ) ptr->_KShared_unref(); }

  KSharedPtr<T>& operator= ( const KSharedPtr<T>& p ) {
    if ( ptr == p.ptr ) return *this;
    if ( ptr ) ptr->_KShared_unref();
    ptr = p.ptr;
    if ( ptr ) ptr->_KShared_ref();
    return *this;
  }
  KSharedPtr<T>& operator= ( T* p ) {
    if ( ptr == p ) return *this;
    if ( ptr ) ptr->_KShared_unref();
    ptr = p;
    if ( ptr ) ptr->_KShared_ref();
    return *this;
  }
  bool operator== ( const KSharedPtr<T>& p ) const { return ( ptr == p.ptr ); }
  bool operator!= ( const KSharedPtr<T>& p ) const { return ( ptr != p.ptr ); }
  bool operator== ( const T* p ) const { return ( ptr == p ); }
  bool operator!= ( const T* p ) const { return ( ptr != p ); }
  bool operator!() const { return ( ptr == 0 ); }
  operator T*() const { return ptr; }

  const T& operator*() const { return *ptr; }
  T& operator*() { return *ptr; }
  const T* operator->() const { return ptr; }
  T* operator->() { return ptr; }

  uint count() const { return ptr->_KShared_count(); } // for debugging purposes
private:
  T* ptr;
};