window_system_available 6336 src/fileio.c && window_system_available (SELECTED_FRAME ())) window_system_available 137 src/frame.c if (window_system_available (f)) window_system_available 6759 src/w32fns.c if (window_system_available (NULL)) window_system_available 9352 src/xfns.c && window_system_available (SELECTED_FRAME ())