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用宏实现一个引用计数类, 可以对不同的所有者类, 产生不同的引用计数类.

/// @file exam_x_x.cpp/// @brief 测试引用计数类#include 
   
    #include 
    
     #include "RefCount.h"#include "RefOwner.h"using namespace std;void clear_cin();/// 用宏实现的类中不能带行注释, 只能带块注释/// 用CLASS_CREFCOUNT宏实现的参考计数类, 可以对不同的资源, 产生不同的参考计数类CLASS_CREFCOUNT(CRefCount, CRefOwner)CLASS_CREFCOUNT(CRefCntForCRefOwner1, CRefOwner1)void fnTestRefCount(){    CRefCount ref1(new CRefOwner("ref1"));    CRefCount ref2(ref1);        CRefCount ref3(new CRefOwner("ref3"));    CRefCount ref4(ref3);        CRefCntForCRefOwner1 ref01(new CRefOwner1("ref01"));    CRefCntForCRefOwner1 ref02(ref01);        CRefCntForCRefOwner1 ref03(new CRefOwner1("ref03"));    CRefCntForCRefOwner1 ref04(ref03);}int main(int argc, char** argv, char** envp){    fnTestRefCount();    /** run result    CRefOwner::CRefOwner ref1    ref_class_name::ref_class_name this = 0018FED8 pOwner = 0x00833C40    ref_class_name::addRef this = 0018FED8 *m_piRefCount = 1    ref_class_name::addRef this = 0018FECC *m_piRefCount = 2    CRefOwner::CRefOwner ref3    ref_class_name::ref_class_name this = 0018FEC0 pOwner = 0x00830F28    ref_class_name::addRef this = 0018FEC0 *m_piRefCount = 1    ref_class_name::addRef this = 0018FEB4 *m_piRefCount = 2    CRefOwner1::CRefOwner1 ref01    ref_class_name::ref_class_name this = 0018FEA8 pOwner = 0x008310D0    ref_class_name::addRef this = 0018FEA8 *m_piRefCount = 1    ref_class_name::addRef this = 0018FE9C *m_piRefCount = 2    CRefOwner1::CRefOwner1 ref03    ref_class_name::ref_class_name this = 0018FE90 pOwner = 0x008311A8    ref_class_name::addRef this = 0018FE90 *m_piRefCount = 1    ref_class_name::addRef this = 0018FE84 *m_piRefCount = 2    ref_class_name::releaseRef this = 0018FE84 *m_piRefCount = 1    ref_class_name::releaseRef this = 0018FE90 *m_piRefCount = 0    ref_class_name::~ref_class_name() this = 0018FE90 0 == releaseRef()    ref_class_name::~ref_class_name() this = 0018FE90 delete m_pOwner 008311A8    CRefOwner1::~CRefOwner1 ref03    ref_class_name::~ref_class_name() this = 0018FE90 delete m_piRefCount 00831238    ref_class_name::releaseRef this = 0018FE9C *m_piRefCount = 1    ref_class_name::releaseRef this = 0018FEA8 *m_piRefCount = 0    ref_class_name::~ref_class_name() this = 0018FEA8 0 == releaseRef()    ref_class_name::~ref_class_name() this = 0018FEA8 delete m_pOwner 008310D0    CRefOwner1::~CRefOwner1 ref01    ref_class_name::~ref_class_name() this = 0018FEA8 delete m_piRefCount 00831160    ref_class_name::releaseRef this = 0018FEB4 *m_piRefCount = 1    ref_class_name::releaseRef this = 0018FEC0 *m_piRefCount = 0    ref_class_name::~ref_class_name() this = 0018FEC0 0 == releaseRef()    ref_class_name::~ref_class_name() this = 0018FEC0 delete m_pOwner 00830F28    CRefOwner::~CRefOwner ref3    ref_class_name::~ref_class_name() this = 0018FEC0 delete m_piRefCount 00831088    ref_class_name::releaseRef this = 0018FECC *m_piRefCount = 1    ref_class_name::releaseRef this = 0018FED8 *m_piRefCount = 0    ref_class_name::~ref_class_name() this = 0018FED8 0 == releaseRef()    ref_class_name::~ref_class_name() this = 0018FED8 delete m_pOwner 00833C40    CRefOwner::~CRefOwner ref1    ref_class_name::~ref_class_name() this = 0018FED8 delete m_piRefCount 00833F08    */    cout << "END, press any key to quit" << endl;    clear_cin();    getchar();    return 0;}void clear_cin(){    cin.clear();    cin.sync();}
    
   

// RefCount.h: interface for the ref_class_name class.////#if !defined(AFX_REFCOUNT_H__2F7675D6_BDC0_4BE6_A0FD_14F51476D8ED__INCLUDED_)#define AFX_REFCOUNT_H__2F7675D6_BDC0_4BE6_A0FD_14F51476D8ED__INCLUDED_#if _MSC_VER > 1000#pragma once#endif // _MSC_VER > 1000#include 
   
    #include 
    
     using namespace std;#define CLASS_CREFCOUNT(ref_class_name, owner_class_name)\class ref_class_name\{\public:\    ref_class_name(owner_class_name* pOwner)\        :m_piRefCount(NULL)\        ,m_pOwner(NULL)\    {\        cout << "ref_class_name::ref_class_name this = " << this << " pOwner = 0x" << pOwner << endl;\        m_piRefCount = new int(0);\        m_pOwner = pOwner;\        addRef();\    }\\    ref_class_name(const ref_class_name* pObj)\    {\        cpyAndAddRef(pObj);\    }\\    ref_class_name(const ref_class_name& Obj)\    {\        cpyAndAddRef(&Obj);\    }\\    virtual ~ref_class_name()\    {\        if (0 == releaseRef())\        {\            cout << "ref_class_name::~ref_class_name() this = " << this << " 0 == releaseRef()" << endl;\            \            if (NULL != m_pOwner)\            {\                cout << "ref_class_name::~ref_class_name() this = " << this << " delete m_pOwner " << m_pOwner << endl;\                delete m_pOwner;\                m_pOwner = NULL;\            }\            \            if (NULL != m_piRefCount)\            {\                cout << "ref_class_name::~ref_class_name() this = " << this << " delete m_piRefCount " << m_piRefCount << endl;\                delete m_piRefCount;\                m_piRefCount = NULL;\            }\        }\    }\    \    void addRef()\    {\        /** 引用计数++ */\        int iRc = 0;\        \        if (NULL != m_piRefCount)\        {\            (*m_piRefCount)++;\            iRc = *m_piRefCount;\            \            cout << "ref_class_name::addRef this = " << this << " *m_piRefCount = " << *m_piRefCount << endl;\        }\    }\\    int releaseRef()\    {\        /** 引用计数-- */\        int iRc = 0;\        \        iRc = (NULL != *m_piRefCount) ? (--(*m_piRefCount)) : 0;\        cout << "ref_class_name::releaseRef this = " << this << " *m_piRefCount = " << iRc << endl;\        return iRc;\    }\    \private:\    void cpyAndAddRef(const ref_class_name* pObj)\    {\        if ((NULL == pObj) || (this == pObj))\        {\            return;\        }\        \        m_piRefCount = pObj->m_piRefCount;\        m_pOwner = pObj->m_pOwner;\        addRef();\    }\    \private:\    int* m_piRefCount; /** 引用计数点数指针 */\    owner_class_name* m_pOwner; /** 引用计数所有者指针 */\};#endif // !defined(AFX_REFCOUNT_H__2F7675D6_BDC0_4BE6_A0FD_14F51476D8ED__INCLUDED_)
    
   

// RefOwner.h: interface for the CRefOwner class.////#if !defined(AFX_REFOWNER_H__C08C0436_4EE1_4AE6_9EC2_B6E320280FAE__INCLUDED_)#define AFX_REFOWNER_H__C08C0436_4EE1_4AE6_9EC2_B6E320280FAE__INCLUDED_#if _MSC_VER > 1000#pragma once#endif // _MSC_VER > 1000class CRefOwner  {public:	CRefOwner(const char* pszName);	virtual ~CRefOwner();private:    char *m_pszName;};class CRefOwner1{public:    CRefOwner1(const char* pszName);    virtual ~CRefOwner1();    private:    char *m_pszName;};#endif // !defined(AFX_REFOWNER_H__C08C0436_4EE1_4AE6_9EC2_B6E320280FAE__INCLUDED_)

// RefOwner.cpp: implementation of the CRefOwner class.////#include 
   
    #include 
    
     #include "RefOwner.h"using namespace std;//// Construction/Destruction//CRefOwner::CRefOwner(const char* pszName){    cout << "CRefOwner::CRefOwner " << pszName << " " << endl;    m_pszName = new char[strlen(pszName) + 1];    strcpy(m_pszName, pszName);}CRefOwner::~CRefOwner(){    if (NULL != m_pszName)    {        cout << "CRefOwner::~CRefOwner " << m_pszName << " " << endl;        delete[] m_pszName;        m_pszName = NULL;    }}CRefOwner1::CRefOwner1(const char* pszName){    cout << "CRefOwner1::CRefOwner1 " << pszName << " " << endl;    m_pszName = new char[strlen(pszName) + 1];    strcpy(m_pszName, pszName);}CRefOwner1::~CRefOwner1(){    if (NULL != m_pszName)    {        cout << "CRefOwner1::~CRefOwner1 " << m_pszName << " " << endl;        delete[] m_pszName;        m_pszName = NULL;    }}
    
   

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