the behaviour depends on whether the mutex was created with <a href="threads.html#al_create_mutex">al_create_mutex</a> or <a href="threads.html#al_create_mutex_recursive">al_create_mutex_recursive</a>. 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.</p>
<p>See also: <a href="threads.html#al_unlock_mutex">al_unlock_mutex</a>.</p>
<p><strong>We don't yet have al_mutex_try