DOKK / manpages / debian 10 / allegro5-doc / ALLEGRO_EVENT_SOURCE.3alleg5.en
ALLEGRO_EVENT_SOURCE(3alleg5) ALLEGRO_EVENT_SOURCE(3alleg5)

ALLEGRO_EVENT_SOURCE - Allegro 5 API

#include <allegro5/allegro.h>
typedef struct ALLEGRO_EVENT_SOURCE ALLEGRO_EVENT_SOURCE;
    

An event source is any object which can generate events. For example, an ALLEGRO_DISPLAY can generate events, and you can get the ALLEGRO_EVENT_SOURCE pointer from an ALLEGRO_DISPLAY with al_get_display_event_source(3alleg5).

You may create your own “user” event sources that emit custom events.

ALLEGRO_EVENT(3alleg5), al_init_user_event_source(3alleg5), al_emit_user_event(3alleg5)

Allegro reference manual