MODULE test_glib ;

(*
   m2-GTK4 test - GLib main loop, timeout source and monotonic clock.
   This test needs no display and is safe to run headless.

   Build/run: see tests/run_tests.sh or `make check`.
*)

FROM GLib IMPORT g_main_loop_new, g_main_loop_run, g_main_loop_quit,
   g_timeout_add, GSourceRemove, g_get_monotonic_time, g_usleep;
FROM SYSTEM IMPORT ADDRESS;
FROM libc IMPORT printf;

VAR
   loop: ADDRESS;
   fired: BOOLEAN;

PROCEDURE OnTimeout (data: ADDRESS) : INTEGER;
BEGIN
   fired := TRUE;
   g_main_loop_quit(loop);
   RETURN GSourceRemove
END OnTimeout;

VAR
   t0, t1: LONGINT;
   ok: BOOLEAN;
BEGIN
   fired := FALSE;
   loop := g_main_loop_new(NIL, 0);

   IF loop = NIL THEN
      printf("test_glib: FAIL (g_main_loop_new returned NIL)\n");
      HALT(1)
   END;

   g_timeout_add(50, OnTimeout, NIL);
   g_main_loop_run(loop);

   ok := fired;
   IF NOT ok THEN printf("test_glib: timeout did not fire\n") END;

   t0 := g_get_monotonic_time();
   g_usleep(1000);
   t1 := g_get_monotonic_time();
   IF t1 <= t0 THEN
      printf("test_glib: monotonic clock did not advance\n");
      ok := FALSE
   END;

   IF ok THEN
      printf("test_glib: PASS\n");
      HALT(0)
   ELSE
      printf("test_glib: FAIL\n");
      HALT(1)
   END
END test_glib.