al_get_keyboard_event_source - Allegro 5 API

       Retrieve  the  keyboard event source.  All [keyboard events]ALLEGRO_EVENT_KEY_DOWN(3alleg5) are generated
       by this event source.

       Returns NULL if the keyboard subsystem was not installed.

Allegro reference manual                                                   al_get_keyboard_event_source(3alleg5)

       al_get_keyboard_event_source - Allegro 5 API

              #include <allegro5/allegro.h>

              ALLEGRO_EVENT_SOURCE *al_get_keyboard_event_source(void)