winex11: Directly use ntdll in display_device_init mutex.

dlls/winex11.drv/display.c

@@ -29,17 +29,21 @@ struct x11drv_display_device_handler desktop_handler;
 
 HANDLE get_display_device_init_mutex(void)
 {
-    static const WCHAR init_mutexW[] = {'d','i','s','p','l','a','y','_','d','e','v','i','c','e','_','i','n','i','t',0};
-    HANDLE mutex = CreateMutexW(NULL, FALSE, init_mutexW);
-
-    WaitForSingleObject(mutex, INFINITE);
+    static const WCHAR init_mutexW[] = {'d','i','s','p','l','a','y','_','d','e','v','i','c','e','_','i','n','i','t'};
+    UNICODE_STRING name = { sizeof(init_mutexW), sizeof(init_mutexW), (WCHAR *)init_mutexW };
+    OBJECT_ATTRIBUTES attr;
+    HANDLE mutex = 0;
+
+    InitializeObjectAttributes( &attr, &name, OBJ_OPENIF, NULL, NULL );
+    NtCreateMutant( &mutex, MUTEX_ALL_ACCESS, &attr, FALSE );
+    if (mutex) NtWaitForSingleObject( mutex, FALSE, NULL );
     return mutex;
 }
 
 void release_display_device_init_mutex(HANDLE mutex)
 {
-    ReleaseMutex(mutex);
-    CloseHandle(mutex);
+    NtReleaseMutant( mutex, NULL );
+    NtClose( mutex );
 }
 
 POINT virtual_screen_to_root(INT x, INT y)