al_drop_next_event - Allegro 5 API

       Drop (remove) the next event from the queue.  If the queue is empty, nothing happens.  Returns true if an
       event was dropped.

       al_drop_next_event - Allegro 5 API

al_flush_event_queue(3alleg5), al_is_event_queue_empty(3alleg5)

Allegro reference manual                                                             al_drop_next_event(3alleg5)

              #include <allegro5/allegro.h>

              bool al_drop_next_event(ALLEGRO_EVENT_QUEUE *queue)