com_ptr_t.h

Go to the documentation of this file.

#ifdef _WIN32
namespace pfc {

    template<typename what> static void _COM_AddRef(what * ptr) {
        if (ptr != NULL) ptr->AddRef();
    }
    template<typename what> static void _COM_Release(what * ptr) {
        if (ptr != NULL) ptr->Release();
    }

    template<class T>
    class com_ptr_t {
    public:
        typedef com_ptr_t<T> t_self;

        inline com_ptr_t() throw() : m_ptr() {}
        template<typename source> inline com_ptr_t(source * p_ptr) throw() : m_ptr(p_ptr) {_COM_AddRef(m_ptr);}
        inline com_ptr_t(const t_self & p_source) throw() : m_ptr(p_source.m_ptr) {_COM_AddRef(m_ptr);}
        template<typename source> inline com_ptr_t(const com_ptr_t<source> & p_source) throw() : m_ptr(p_source.get_ptr()) {_COM_AddRef(m_ptr);}

        inline ~com_ptr_t() throw() {_COM_Release(m_ptr);}
        
        inline void copy(T * p_ptr) throw() {
            _COM_Release(m_ptr);
            m_ptr = p_ptr;
            _COM_AddRef(m_ptr);
        }

        template<typename source> inline void copy(const com_ptr_t<source> & p_source) throw() {copy(p_source.get_ptr());}

        inline void attach(T * p_ptr) throw() {
            _COM_Release(m_ptr);
            m_ptr = p_ptr;
        }   

        inline const t_self & operator=(const t_self & p_source) throw() {copy(p_source); return *this;}
        inline const t_self & operator=(T* p_source) throw() {copy(p_source); return *this;}
        template<typename source> inline const t_self & operator=(const com_ptr_t<source> & p_source) throw() {copy(p_source); return *this;}
        template<typename source> inline const t_self & operator=(source * p_ptr) throw() {copy(p_ptr); return *this;}

        inline void release() throw() {
            _COM_Release(m_ptr);
            m_ptr = NULL;
        }


        inline T* operator->() const throw() {PFC_ASSERT(m_ptr);return m_ptr;}

        inline T* get_ptr() const throw() {return m_ptr;}
        
        inline T* duplicate_ptr() const throw() //should not be used ! temporary !
        {
            _COM_AddRef(m_ptr);
            return m_ptr;
        }

        inline T* detach() throw() {
            return replace_null_t(m_ptr);
        }

        inline bool is_valid() const throw() {return m_ptr != 0;}
        inline bool is_empty() const throw() {return m_ptr == 0;}

        inline bool operator==(const com_ptr_t<T> & p_item) const throw() {return m_ptr == p_item.m_ptr;}
        inline bool operator!=(const com_ptr_t<T> & p_item) const throw() {return m_ptr != p_item.m_ptr;}
        inline bool operator>(const com_ptr_t<T> & p_item) const throw() {return m_ptr > p_item.m_ptr;}
        inline bool operator<(const com_ptr_t<T> & p_item) const throw() {return m_ptr < p_item.m_ptr;}

        inline static void g_swap(com_ptr_t<T> & item1, com_ptr_t<T> & item2) throw() {
            pfc::swap_t(item1.m_ptr,item2.m_ptr);
        }

        inline T** receive_ptr() throw() {release();return &m_ptr;}
        inline void** receive_void_ptr() throw() {return (void**) receive_ptr();}

        inline t_self & operator<<(t_self & p_source) throw() {attach(p_source.detach());return *this;}
        inline t_self & operator>>(t_self & p_dest) throw() {p_dest.attach(detach());return *this;}
    private:
        T* m_ptr;
    };

}
#endif