GlobalReAlloc

问题描述

你好，

我使用WTL 8库，发现其中一个标头(atldlgs.h)存在问题，该标头使用GlobalReAlloc函数.

基本上，该函数失败，返回NULL指针，而GetLastError()返回8，这意味着内存不足".当然，我有足够的可用内存...并且请求的字节数非常低.

有人知道GlobalReAlloc失败的原因吗?这是一些错误吗?
还是我错过了什么?
在此先感谢您提供任何有关此信息，
奥利维尔.

我正在使用Windows Vista SP2 + VS2008.

这是一个重现该错误的简单程序:

stdafx.h :

Hello,

I''im using the WTL 8 library, and I found there''s a problem in one of the headers (atldlgs.h), which makes use of the GlobalReAlloc function.

Basically, the function fails, returns a NULL pointer, and GetLastError() returns 8, which means "not enough memory". Of course I have plenty of memory available... and the amount of requested bytes is very low.

Does some know the reason why GlobalReAlloc would fail? is it some bug ?
Or did I miss something?
Thanks in advance for any information about this,
Olivier.

I''m using Windows Vista SP2 + VS 2008.

Here is a simple program to reproduce the error:

stdafx.h:

#pragma once
#include <stdio.h>
#include <tchar.h>
#include <windows.h>
#include <conio.h>

testGlobalReAlloc.cpp :

testGlobalReAlloc.cpp:

#include "stdafx.h"

int _tmain(int argc, _TCHAR* argv[])
{
    int size1 = 10240;
    int size2 = 20480;
    for (int i=0; i<15; i++)
    {
        HGLOBAL h = ::GlobalAlloc(GPTR, size1);
        if (NULL == h)
        {
            _tprintf(_T("NULL! %d\r\n"), i);
            break;
        }
        HGLOBAL h2 = ::GlobalReAlloc(h, size2, 0);
        if (NULL == h2)
        {
            ::GlobalFree(h);
            _tprintf(_T("NULL 2! %d\r\n"), i); // gets here the first time GlobalReAlloc is used
            break;
        }
        ::GlobalFree(h2);
        _tprintf(_T("ok %d\r\n"), i);
    }
    _tprintf(_T("press key\r\n"));
    getch();
    return 0;
}

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