// 3.2ms
wstring GetFileNameFromHandle(HANDLE hFile) 
{
	TimeCounter tc(L"GetFileNameFromHandle in spend ");
	const int ObjectNameInformation = 1;  // enum OBJECT_INFORMATION_CLASS;
	typedef LONG (CALLBACK* ZWQUERYOBJECT)(
		HANDLE ObjectHandle,
		ULONG  ObjectInformationClass,
		PVOID  ObjectInformation,
		ULONG  ObjectInformationLength,
		PULONG ReturnLength
		);
	
	static HMODULE hNtDLL = LoadLibrary(L"ntdll.dll"); 
	if (!hNtDLL)
	{
		hNtDLL = LoadLibrary(L"ntdll.dll");
	}
	static ZWQUERYOBJECT ZwQueryObject = (ZWQUERYOBJECT)GetProcAddress(hNtDLL, "ZwQueryObject");
	if (!ZwQueryObject)
	{
		ZwQueryObject = (ZWQUERYOBJECT)GetProcAddress(hNtDLL, "ZwQueryObject");
		if (!ZwQueryObject)
		{
			wprintf(L"[%s] could not get filename, GetProcAddress->ZwQueryObject failed.\n", 
				__WFUNCTION__);
			return L"";
		}
	}

	//TimeCounter* ptc = NULL;
	// 0.0ms
	//ptc = new TimeCounter(L"ZwQueryObject spend ");
	WCHAR  szPathInfo[MAX_PATH + 4] = {0};
	ULONG  dwResult;
	// notice success equal to !=0
	// szPathInfo = "ĐĒ\Device\HarddiskVolume3\Documents and Settings\Administrator\My Documents\Visual Studio 2008\Projects\20160725_R3ReadCache\file_list.txt"
	if (ZwQueryObject(hFile, ObjectNameInformation, szPathInfo, sizeof(szPathInfo)-1 , &dwResult) != 0) 
	{
		wprintf(L"[%s] could not get filename, ZwQueryObject failed.\n", __WFUNCTION__);
		return L"";
	}
	//delete ptc;

	// we do not need a judge for net file
	// org code's logic is if this is a net file, remove it's prefix and return...no help for us
	// net file should not be cached
#if 0
	// if the file on net drive
	const PWCHAR szNetDevice = L"//Device//LanmanRedirector";
	static DWORD dwDeviceNameLen = lstrlenW(szNetDevice);
	if (!wcsnicmp(szPathInfo + 4, szNetDevice, dwDeviceNameLen)) // if equal
	{
		lstrcpyW(lpFilePath, L"//"); // add a //, means net file named as //Device/....
		lstrcatW(lpFilePath, szPathInfo + 4 + lstrlenW(szNetDevice)); // skip 4+/Device/LanmanRedirector WCHARs
		return lpFilePath;
	}
#endif


	// 0.0ms
	//ptc = new TimeCounter(L"GetLogicalDriveStrings spend ");
	WCHAR  szDrive   [MAX_PATH] = {0};
	WCHAR *lpDrive = szDrive;
	int    iPathLen;
	// C.:.\...D.:.\...E.:.\...F.:.\...I.:.\...L.:.\...R.:.\...Z.:.\...
	// MAX_PATH=260/4=65 >26
	if (GetLogicalDriveStrings(MAX_PATH-1, szDrive) >= MAX_PATH) 
	{
		wprintf(L"[%s] could not get filename, GetLogicalDriveStrings failed.\n", __WFUNCTION__);
		return L"";
	}
	//delete ptc;

	while ((iPathLen = lstrlenW(lpDrive)) != 0) 
	{
		WCHAR szDevName[MAX_PATH] = {0};

		lpDrive[iPathLen - 1] = 0x00; // The device name cannot have a trailing backslash
		// szDevName = "\Device\HarddiskVolume3"
		// 0.0ms
		//ptc = new TimeCounter(L"QueryDosDeviceW spend ");
		int iDevLen = (int)QueryDosDeviceW(lpDrive, szDevName, MAX_PATH);
		//delete ptc;

		// 0.0ms
		//ptc = new TimeCounter(L"wcsnicmp spend ");
		if (iDevLen && iDevLen < MAX_PATH){
			iDevLen = lstrlenW(szDevName);
			if (!wcsnicmp(szPathInfo + 4, szDevName, iDevLen))  // equal
			{
				WCHAR lpFilePath[MAX_PATH] = {0};
				lstrcpyW(lpFilePath, lpDrive);
				lstrcatW(lpFilePath, szPathInfo + 4 + iDevLen); // jump no sense 8 bytes, jump dos device name
				//break;
				//delete ptc;
				//delete ptc2;
				return lpFilePath;
			}
		}
		lpDrive += iPathLen + 1;
	}

	return L"";
}