SafeArrayDestroy没有释放掉内存？

wxgiter 2010-12-24 01:44:54

#ifdef _DEBUG

#define DEBUG_CLIENTBLOCK new( _CLIENT_BLOCK, __FILE__, __LINE__)

#else

#define DEBUG_CLIENTBLOCK

#endif   // _DEBUG

#define _CRTDBG_MAP_ALLOC

#include "stdafx.h"

#include <iostream>

#include "windows.h"

#include "oaidl.h"

#include "Psapi.h"

#pragma comment(lib, "Psapi.lib")

#ifdef _DEBUG

#define new   DEBUG_CLIENTBLOCK

#endif // _DEBUG 



void displayMem(char * string)

{

	HANDLE hProcess = GetCurrentProcess();

	PROCESS_MEMORY_COUNTERS pmc;

	GetProcessMemoryInfo(hProcess, &pmc, sizeof(PROCESS_MEMORY_COUNTERS));

	std::cout << string << "\t\tMemSize: " << pmc.WorkingSetSize << " B\n";

	CloseHandle(hProcess);

}



int _tmain(int argc, _TCHAR* argv[])

{

	_CrtSetDbgFlag(_CRTDBG_ALLOC_MEM_DF|_CRTDBG_LEAK_CHECK_DF);



	//创建SAFEARRAY数组，每个元素为long型，该数组是一维数组

	long nData[10]={1,2,3,4,5,6,7,8,9,10};



	displayMem("before create SafeArray");

	SAFEARRAY* pArray=NULL;

	HRESULT hr=SafeArrayAllocDescriptor(1,&pArray);// 创建SAFEARRAY结构的对象

	displayMem("after create SafeArray");



	pArray->cbElements=sizeof(nData[0]);

	pArray->rgsabound[0].cElements=10;

	pArray->rgsabound[0].lLbound=0;

	SafeArrayAllocData(pArray);



	long* pData=NULL;

	SafeArrayAccessData(pArray,(void**)&pData);

	long l(0),h(0);

	SafeArrayGetLBound(pArray,1,&l);

	SafeArrayGetUBound(pArray,1,&h);

	long Size=h-l+1;

	SafeArrayAccessData(pArray,(void**)&pData);

	for(long Idx=l;Idx<Size;++Idx)

	{

		pData[Idx]=nData[Idx];

		std::cout << pData[Idx] << std::endl;

	}

	SafeArrayUnaccessData(pArray);



	//访问SAFEARRAY数组

	long* pValue=NULL;

	SafeArrayAccessData(pArray,(void**)&pValue);

	long Low(0),High(0);

	hr=SafeArrayGetLBound(pArray,1,&Low);//维数索引从1开始

	hr=SafeArrayGetUBound(pArray,1,&High);// 维数索引从1开始



	SafeArrayUnaccessData(pArray);



	displayMem("before destory SafeArray");

	SafeArrayDestroy(pArray);

	displayMem("after destory SafeArray");



	getchar();

	return 0;

}

如以上代码所示，运行后输出结果为：
before create SafeArray MemSize: 4222976 B
after create SafeArray MemSize: 4358144 B
1
2
3
4
5
6
7
8
9
10
before destory SafeArray MemSize: 4358144 B
after destory SafeArray MemSize: 4362240 B

调用SafeArrayDestroy之后，为什么没有释放掉内存，内存反而又增加了？？

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