al_get_joystick_event_source - Allegro 5 API

       Returns  the global joystick event source.  All [joystick events]ALLEGRO_EVENT_JOYSTICK_AXIS(3alleg5) are
       generated by this event source.

Allegro reference manual                                                   al_get_joystick_event_source(3alleg5)

       al_get_joystick_event_source - Allegro 5 API

              #include <allegro5/allegro.h>

              ALLEGRO_EVENT_SOURCE *al_get_joystick_event_source(void)