C++之CNoTrackObject类和new delete操作符的重载实例

class CNoTrackObject{ 
public: //在此出过错，没有加public 默认为类的私有变量，MyThreadData继承这个类后也无法访问成员变量 
    void* operator new(size_t nSize); 
    void operator delete(void*); 
    virtual ~CNoTrackObject(){} 
};

void* CNoTrackObject::operator new(size_t nSize) 
{ 
    //申请一块内存 
    void* p = ::GlobalAlloc(GPTR , nSize); 
    return p; 
} 
 
void CNoTrackObject::operator delete(void* p) 
{ 
    if (p != NULL) 
    { 
        ::GlobalFree(p); 
    } 
}

struct MyThreadData:public CNoTrackObject 
{ 
    MyThreadData* pNext; 
    int nShortData; 
}; 

 

for (int i=0;i<10;i++) 
    { 
        <span style="color:#ff0000;">pData = new MyThreadData;</span> 
        pData->nShortData = i; 
        list.AddHead(pData); 
    } 
 
    //遍历链表，释放MyThreadData对象占用的空间 
    pData = (MyThreadData*)list.GetHead(); 
    while(pData != NULL) 
    { 
        MyThreadData* pNextData = pData->pNext; 
        printf("The value is %d\n",pData->nShortData); 
        <span style="color:#ff0000;">delete pData;</span> 
        pData = pNextData; 
    }