Provided by: allegro5-doc_5.0.10-2_all 

NAME
al_create_mutex - Allegro 5 API
SYNOPSIS
#include <allegro5/allegro.h>
ALLEGRO_MUTEX *al_create_mutex(void)
DESCRIPTION
Create the mutex object (a mutual exclusion device). The mutex may or may not support "recursive"
locking.
Returns the mutex on success or NULL on error.
SEE ALSO
al_create_mutex_recursive(3alleg5).
Allegro reference manual al_create_mutex(3alleg5)()