mgcsmartpointer.mcr

《3D游戏引擎设计》的源码

// Magic Software, Inc.
// http://www.magic-software.com
// Copyright (c) 2000, All Rights Reserved
//
// Source code from Magic Software is supplied under the terms of a license
// agreement and may not be copied or disclosed except in accordance with the
// terms of that agreement.  The various license agreements may be found at
// the Magic Software web site.  This file is subject to the license
//
// RESTRICTED USE SOURCE CODE
// http://www.magic-software.com/License/restricted.pdf

#ifndef MGCSMARTPOINTER_MCR
#define MGCSMARTPOINTER_MCR

// insert in root class declaration
#define MgcDeclareRootSmartPointers \
    public: \
        void IncrementReferences () \
        { \
            m_uiReferences++; \
        } \
        void DecrementReferences () \
        { \
            if ( --m_uiReferences == 0 ) \
                delete this; \
        } \
        unsigned int GetReferences () \
        { \
            return m_uiReferences; \
        } \
        static unsigned int GetTotalObjects () \
        { \
            return ms_uiTotalObjects; \
        } \
    private: \
        unsigned int m_uiReferences; \
        static unsigned int ms_uiTotalObjects

// insert in source file of root class of inheritance tree
#define MgcImplementRootSmartPointers(classname) \
    unsigned int classname::ms_uiTotalObjects = 0

#define MgcSmartPointer(classname) \
    class classname; \
    typedef MgcPointer<classname> classname##Ptr

// cast a smart pointer of one type to a pointer of another type.
#define MgcSmartPointerCast(type,smartptr) ((type*)(void*)(smartptr))

#endif