Function isGlobalKernelPrefix

src/common/utils.cpp:479–560

//   -------------------------------------------------------------

bool isGlobalKernelPrefix()
{
	// The strategy of this function is as follows: use Global\ kernel namespace
	// for engine objects if we can. This can be prevented by either lack of OS support
	// for the feature (Win9X) or lack of privileges (Vista, Windows 2000/XP restricted accounts)

	const DWORD dwVersion = GetVersion();

	// Is Windows NT running?
	if (!(dwVersion & 0x80000000))
	{
		if (LOBYTE(LOWORD(dwVersion)) <= 4) // This is Windows NT 4.0 or earlier.
			return validateProductSuite("Terminal Server");

		// Is it Windows 2000 or greater? It is possible to use Global\ prefix on any
		// version of Windows from Windows 2000 and up
		// Check if we have enough privileges to create global handles.
		// If not fall back to creating local ones.
		// The API for that is the NT thing, so we have to get addresses of the
		// functions dynamically to avoid troubles on Windows 9X platforms

		DynLibHandle hmodAdvApi(LoadLibrary("advapi32.dll"));

		if (!hmodAdvApi)
		{
			gds__log("LoadLibrary failed for advapi32.dll. Error code: %lu", GetLastError());
			return false;
		}

		typedef BOOL (WINAPI *PFnOpenProcessToken) (HANDLE, DWORD, PHANDLE);
		typedef BOOL (WINAPI *PFnLookupPrivilegeValue) (LPCSTR, LPCSTR, PLUID);
		typedef BOOL (WINAPI *PFnPrivilegeCheck) (HANDLE, PPRIVILEGE_SET, LPBOOL);

		PFnOpenProcessToken pfnOpenProcessToken =
			(PFnOpenProcessToken) GetProcAddress(hmodAdvApi, "OpenProcessToken");
		PFnLookupPrivilegeValue pfnLookupPrivilegeValue =
			(PFnLookupPrivilegeValue) GetProcAddress(hmodAdvApi, "LookupPrivilegeValueA");
		PFnPrivilegeCheck pfnPrivilegeCheck =
			(PFnPrivilegeCheck) GetProcAddress(hmodAdvApi, "PrivilegeCheck");

		if (!pfnOpenProcessToken || !pfnLookupPrivilegeValue || !pfnPrivilegeCheck)
		{
			// Should never happen, really
			gds__log("Cannot access privilege management API");
			return false;
		}

		HANDLE hProcess = GetCurrentProcess();
		HANDLE hToken;
		if (pfnOpenProcessToken(hProcess, TOKEN_QUERY, &hToken) == 0)
		{
			gds__log("OpenProcessToken failed. Error code: %lu", GetLastError());
			return false;
		}

		PRIVILEGE_SET ps;
		memset(&ps, 0, sizeof(ps));
		ps.Control = PRIVILEGE_SET_ALL_NECESSARY;