-/** installs a timer with the first timeout 'value_sec' and then a periodic timeout with interval_sec
- * '_callback' is the callback function when the timer reaches the timeout.
- * If 'value_sec' == 0 then the timer is disabled (but not uninstalled)
- * If 'interval_sec' == 0 the timer is a single shot timer, ie. no periodic timeout occur
- * returns the 'id' of the timer, which is needed for uninstalling the timer **/
-int install_timer(int value_sec, int value_nsec, int interval_sec, int interval_nsec, void (*_callback)());
-
-/** resets a timer to the new values. If 'id' does not exist nothing happens.
- * If value_sec == 0 the timer is stopped **/
-void reset_timer(int id, int value_sec, int value_nsec, int interval_sec, int interval_nsec);
-
-/** uninstalls a timer with the given 'id'. If no timer is installed with this id nothing happens **/
-void uninstall_timer(int id);
+/** installs a timeout with the first timeout of 'value_msec' and then a periodic timeout with
+ * 'interval_msec'. '_callback' is the callback function when the timer reaches the timeout.
+ * returns a pointer to the timeout, which is needed for stopping it again **/
+const struct timeout* add_timeout(int value_msec, int interval_msec, void (*_callback)());
+
+void change_timeout(const struct timeout* t, int value_msec, int interval_msec, void (*_callback)());
+
+/** stops the timeout 't' **/
+void stop_timeout(const struct timeout* t);
+
+/** stops all timeouts **/
+void stop_all_timeouts();
+
+void update_next_timeout();
+void callback_timeout_expired();