+void add_timeout_intern(int value_msec, int interval_msec, void(*_callback)(void*), void* arg, timeout* t);
+gint compare_timeouts(gconstpointer t1, gconstpointer t2);
+gint compare_timespecs(const struct timespec* t1, const struct timespec* t2);
+int timespec_subtract(struct timespec* result, struct timespec* x, struct timespec* y);
+struct timespec add_msec_to_timespec(struct timespec ts, int msec);
+
+
+int align_with_existing_timeouts(timeout* t);
+void create_multi_timeout(timeout* t1, timeout* t2);
+void append_multi_timeout(timeout* t1, timeout* t2);
+int calc_multi_timeout_interval(multi_timeout_handler* mth);
+void update_multi_timeout_values(multi_timeout_handler* mth);
+void callback_multi_timeout(void* mth);
+void remove_from_multi_timeout(timeout* t);
+void stop_multi_timeout(timeout* t);