al_create_event_queue - Allegro 5 API

       Create  a new, empty event queue, returning a pointer to the newly created object if successful.  Returns
       NULL on error.

       al_create_event_queue - Allegro 5 API

al_register_event_source(3alleg5), al_destroy_event_queue(3alleg5), ALLEGRO_EVENT_QUEUE(3alleg5)

Allegro reference manual                                                          al_create_event_queue(3alleg5)

              #include <allegro5/allegro.h>

              ALLEGRO_EVENT_QUEUE *al_create_event_queue(void)