错误C2661:"CObject :: operator new":没有重载函数需要4个参数 [英] error C2661: 'CObject::operator new' : no overloaded function takes 4 arguments

问题描述

我正在尝试在mfc程序中查找内存泄漏.通常，我会执行以下操作:

I have a memory leak that I'm trying to hunt down in my mfc program. Typically I would do something like the following:

头文件

// Leak Detection
#if defined(WIN32) && defined(_DEBUG)
     #define _CRTDBG_MAP_ALLOC
     #include <stdlib.h>
     #include <crtdbg.h>
#endif

cpp文件

// Leak detection
#if defined(WIN32) && defined(_DEBUG) && defined(_CRTDBG_MAP_ALLOC)
    #ifdef DEBUG_NEW 
        #undef DEBUG_NEW
    #endif
    #define DEBUG_NEW new( _NORMAL_BLOCK, __FILE__, __LINE__ )
    #define new DEBUG_NEW
#endif

该技术在大多数文件中都很好用，但是当我将其包含在某些文件(如文档)中时，出现错误:错误C2661:'CObject :: operator new':没有重载的函数需要4个参数

This technique works well in most files, but when I include it in some files such as my document, I get the error: error C2661: 'CObject::operator new' : no overloaded function takes 4 arguments

这里的解决方案是什么?我应该在某个地方或某个地方#undef-ing new吗?

What's the solution here? Should I be #undef-ing new somewhere or something?

谢谢！

推荐答案

出于泄漏检测的目的，我还使用了与您相同的功能.

I also use the same functionality as you for the purpose of leak detection.

您可以注释掉或删除DEBUG_NEW定义块，前提是您不再需要它来捕获内存泄漏.或者，如果您仍然需要它，请保持原样并使用

Either you can comment out or delete the DEBUG_NEW definition block, assuming you don't need it any more for trapping memory leaks. Or if you still need it, leave it as it is and use

#ifdef _DEBUG
#undef new
    CMyOject* pMyObjectInst = new CMyObject();
#define new DBG_NEW
#endif  

因此，您可以在创建对象之前取消定义新对象(请参见错误列表中的行号)，并在之后立即重新定义它，以便仍可以识别在创建对象之后发生的任何内存泄漏.

So, you undefine new just before object creation (see the line numbers in your Error List) and redefine it again immediately after, so that any memory leaks which occur after this object creation are still identifiable.

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