al_is_bitmap_locked - Allegro 5 API

       Returns whether or not a bitmap is already locked.

       al_is_bitmap_locked - Allegro 5 API

al_lock_bitmap(3alleg5), al_lock_bitmap_region(3alleg5), al_unlock_bitmap(3alleg5)

Allegro reference manual                                                            al_is_bitmap_locked(3alleg5)

              #include <allegro5/allegro.h>

              bool al_is_bitmap_locked(ALLEGRO_BITMAP *bitmap)