ALLEGRO_KEYBOARD_STATE - Allegro 5 API

       This  is a structure that is used to hold a “snapshot” of a keyboard’s state at a particular instant.  It
       contains the following publically readable fields:

       • display - points to the display that had keyboard focus at the time the state was saved.  If no display
         was focused, this points to NULL.

       You cannot read the state of keys directly.  Use the function al_key_down(3alleg5).

Allegro reference manual                                                         ALLEGRO_KEYBOARD_STATE(3alleg5)

       ALLEGRO_KEYBOARD_STATE - Allegro 5 API

              #include <allegro5/allegro.h>

              typedef struct ALLEGRO_KEYBOARD_STATE ALLEGRO_KEYBOARD_STATE;