al_get_timer_event_source - Allegro 5 API

       Retrieve the associated event source.  Timers will generate events of type ALLEGRO_EVENT_TIMER(3alleg5).

Allegro reference manual                                                      al_get_timer_event_source(3alleg5)

       al_get_timer_event_source - Allegro 5 API

              #include <allegro5/allegro.h>

              ALLEGRO_EVENT_SOURCE *al_get_timer_event_source(ALLEGRO_TIMER *timer)