内存映射文件使用例子

//写数据，Handle不能关掉，不然就读不到了

TCHAR url[1024] = {0};
size_t size = _countof(url);
//Update::GetInstance()->GetUpdateUrl(url, size);赋值
HANDLE hFile = CreateFileMapping((HANDLE)-1,NULL,PAGE_READWRITE,0,size,_T("URL"));//指定一个名称
VOID * pMem = NULL;
if(hFile != NULL)
{
//获取存储的内存地址
pMem = MapViewOfFile(hFile,FILE_MAP_ALL_ACCESS,0,0,0);
}
memcpy(pMem,url,size);

//读取数据

TCHAR url[1024] = {0};
size_t size = _countof(url);
HANDLE hFile = CreateFileMapping((HANDLE)-1,NULL,PAGE_READWRITE,0,size,_T("URL"));
VOID * pMem = NULL;
if(hFile != NULL)
{
pMem = MapViewOfFile(hFile,FILE_MAP_ALL_ACCESS,0,0,0);
memcpy(url,pMem,size);
}

CloseHandle(hFile);