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一个单线程的引用计数类, 针对具体类.

/// @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();void fnTestRefCount();int main(int argc, char** argv, char** envp){    fnTestRefCount();    cout << "END, press any key to quit" << endl;    clear_cin();    getchar();    return 0;}void fnTestRefCount(){    cout << endl << "fnTestRefCount() ==> CRefCount ref1(new CRefOwner(\"ref1\"));" << endl << endl;    CRefCount ref1(new CRefOwner("ref1"));    cout << endl << "fnTestRefCount() ==> CRefCount ref2(ref1);" << endl << endl;    CRefCount ref2(ref1);        cout << endl <<  "fnTestRefCount() ==> CRefCount ref3(new CRefOwner(\"ref3\"));" << endl << endl;    CRefCount ref3(new CRefOwner("ref3"));    cout << endl <<  "fnTestRefCount() ==> CRefCount ref4(ref3);" << endl << endl;    CRefCount ref4(ref3);    cout << endl <<  "fnTestRefCount() <==" << endl << endl;}void clear_cin(){    cin.clear();    cin.sync();}
    
   

// RefCount.h: interface for the CRefCount 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 "RefOwner.h"class CRefCount  {public:	CRefCount(CRefOwner* pOwner);    CRefCount(const CRefCount* pObj);    CRefCount(const CRefCount& Obj);	virtual ~CRefCount();    void addRef(); ///< 引用计数++    int releaseRef(); ///< 引用计数--private:    void cpyAndAddRef(const CRefCount* pObj);private:    int* m_piRefCount; ///< 引用计数点数指针    CRefOwner* m_pOwner; ///< 引用计数所有者指针s};#endif // !defined(AFX_REFCOUNT_H__2F7675D6_BDC0_4BE6_A0FD_14F51476D8ED__INCLUDED_)

// RefCount.cpp: implementation of the CRefCount class.////#include 
   
    #include 
    
     #include 
     
      #include "RefCount.h"//// Construction/Destruction//using namespace std;CRefCount::CRefCount(CRefOwner* pOwner):m_piRefCount(NULL),m_pOwner(NULL){    cout << "CRefCount::CRefCount this = " << this << " pOwner = 0x" << pOwner << endl;    m_piRefCount = new int(0);    m_pOwner = pOwner;    addRef();}CRefCount::CRefCount(const CRefCount* pObj){    cpyAndAddRef(pObj);}CRefCount::CRefCount(const CRefCount& Obj){    cpyAndAddRef(&Obj);}void CRefCount::cpyAndAddRef(const CRefCount* pObj){    if ((NULL == pObj) || (this == pObj))    {        return;    }        m_piRefCount = pObj->m_piRefCount;    m_pOwner = pObj->m_pOwner;    addRef();}CRefCount::~CRefCount(){    if (0 == releaseRef())    {        cout << "CRefCount::~CRefCount() this = " << this << " 0 == releaseRef()" << endl;        if (NULL != m_pOwner)        {            cout << "CRefCount::~CRefCount() this = " << this << " delete m_pOwner " << m_pOwner << endl;            delete m_pOwner;            m_pOwner = NULL;        }        if (NULL != m_piRefCount)        {            cout << "CRefCount::~CRefCount() this = " << this << " delete m_piRefCount " << m_piRefCount << endl;            delete m_piRefCount;            m_piRefCount = NULL;        }    }}void CRefCount::addRef(){    int iRc = 0;    if (NULL != m_piRefCount)    {        (*m_piRefCount)++;        iRc = *m_piRefCount;        cout << "CRefCount::addRef this = " << this << " *m_piRefCount = " << *m_piRefCount << endl;    }}int CRefCount::releaseRef(){    int iRc = 0;    iRc = (NULL != *m_piRefCount) ? (--(*m_piRefCount)) : 0;    cout << "CRefCount::releaseRef this = " << this << " *m_piRefCount = " << iRc << endl;    return iRc;}
     
    
   

// 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;};#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 this = " << this << " pszName = " << pszName << " " << endl;    m_pszName = new char[strlen(pszName) + 1];    strcpy(m_pszName, pszName);}CRefOwner::~CRefOwner(){    if (NULL != m_pszName)    {        cout << "CRefOwner::~CRefOwner this = " << this << " m_pszName = " << m_pszName << endl;        delete[] m_pszName;        m_pszName = NULL;    }}
    
   

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