请问如何释放IStream?
水经注GIS 企业官方账号 2008-12-20 11:04:21 我循环调用以下函数,结果内存直线上涨,后来调试跟踪后发现在执行“pIStream->Release();”这句代码时,内存没有减少,请问是什么原因呢?
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//从Bitmap 生成 Void * buffer
void* CAdo::CreateBufferFromBitmap(Bitmap* pBitmap,UINT& nBufferSize)
{
CLSID clsid;
int clsidResult = GetImageCLSID(L"image/jpeg",&clsid);
LPSTREAM pIStream = NULL;
CreateStreamOnHGlobal(NULL, TRUE, &pIStream);
pBitmap->Save(pIStream,&clsid);
STATSTG statstg;
memset (&statstg, 0, sizeof(statstg));
pIStream->Stat(&statstg, STATFLAG_NONAME);
void* pSaveBuffer = malloc(statstg.cbSize.LowPart);
LARGE_INTEGER dlibMove = { 0 };
pIStream->Seek(dlibMove,STREAM_SEEK_SET,NULL);
pIStream->Read(pSaveBuffer,statstg.cbSize.LowPart,NULL);
pIStream->Release();
pIStream = NULL;
nBufferSize = statstg.cbSize.LowPart;
return pSaveBuffer;
}