release_bitmap - Releases a previously locked bitmap. Allegro game programming library.

       Releases  a  bitmap  that  was  previously  locked by calling acquire_bitmap().  If the bitmap was locked
       multiple times, you must release it the same number of times before it will truly be unlocked.

       release_bitmap - Releases a previously locked bitmap. Allegro game programming library.

acquire_bitmap(3alleg4),     acquire_screen(3alleg4),      release_screen(3alleg4),      ex3buf(3alleg4),
       exaccel(3alleg4),      expat(3alleg4),     exquat(3alleg4),     exscroll(3alleg4),     exswitch(3alleg4),
       exupdate(3alleg4)

Allegro                                           version 4.4.3                          release_bitmap(3alleg4)

#include<allegro.h>voidrelease_bitmap(BITMAP*bmp);