void gdk_display_sync (GdkDisplay *display);
void gdk_display_flush (GdkDisplay *display);
-void gdk_display_close (GdkDisplay *display);
+void gdk_display_close (GdkDisplay *display);
+gboolean gdk_display_is_closed (GdkDisplay *display);
#ifndef GDK_DISABLE_DEPRECATED
GList * gdk_display_list_devices (GdkDisplay *display);