+ *
+ * Unfortunately, all of the above documentation holds with the X11
+ * backend only. With the Win32 backend, GDK and GTK+ calls should not
+ * be attempted from multiple threads at all. Combining the GDK lock
+ * with other locks such as the Python global interpreter lock can be
+ * complicated.
+ *
+ * For these reason, the threading support has been deprecated in
+ * GTK+ 3.6. Instead of calling GTK+ directly from multiple threads,
+ * it is recommended to use g_idle_add(), g_main_context_invoke()
+ * and similar functions to make these calls from the main thread
+ * instead. The main thread is the thread which has called gtk_init()
+ * and is running the GTK+ mainloop. GTK+ itself will continue to
+ * use the GDK lock internally as long as the deprecated functionality
+ * is still available, and other libraries should probably do the same.