Provided by: allegro5-doc_5.2.9.1+dfsg-1.1build4_all 

NAME
al_destroy_display - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro.h>
void al_destroy_display(ALLEGRO_DISPLAY *display)
DESCRIPTION
Destroy a display.
If the target bitmap of the calling thread is tied to the display, then it implies a call to “al_set_tar‐
get_bitmap(NULL);” before the display is destroyed.
That special case notwithstanding, you should make sure no threads are currently targeting a bitmap which
is tied to the display before you destroy it.
SEE ALSO
al_set_target_bitmap(3alleg5)
Allegro reference manual al_destroy_display(3alleg5)