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al_lock_mutex(3)                                              al_lock_mutex(3)

NAME
       al_lock_mutex - Allegro 5 API

SYNOPSIS

              #include <allegro5/allegro.h>

              void al_lock_mutex(ALLEGRO_MUTEX *mutex)

DESCRIPTION
       Acquire the lock on mutex.  If the mutex is already locked by another
       thread, the call will block until the mutex becomes available and
       locked.

       If the mutex is already locked by the calling thread, then the
       behaviour depends on whether the mutex was created with
       al_create_mutex(3) or al_create_mutex_recursive(3).  In the former
       case, the behaviour is undefined; the most likely behaviour is
       deadlock.  In the latter case, the count in the mutex will be
       incremented and the call will return immediately.

SEE ALSO
       al_unlock_mutex(3).

       We don't yet have al_mutex_trylock.

Allegro reference manual                                      al_lock_mutex(3)