al_acknowledge_drawing_halt - Allegro 5 API

       Call  this  in  response  to  the  ALLEGRO_EVENT_DISPLAY_HALT_DRAWING(3alleg5)  event.  This is currently
       necessary for Android and iOS as you are not allowed to draw to your display while it is not being shown.
       If you do not call this function to let the operating system know that you have stopped drawing or if you
       call it to late the application likely will be considered misbehaving and get terminated.

       al_acknowledge_drawing_halt - Allegro 5 API

ALLEGRO_EVENT_DISPLAY_HALT_DRAWING(3alleg5)

Allegro reference manual                                                    al_acknowledge_drawing_halt(3alleg5)

       5.1.0

              #include <allegro5/allegro.h>

              void al_acknowledge_drawing_halt(ALLEGRO_DISPLAY *display)