_destroy_mutex(ALLEGRO_MUTEX *mutex)
</code></pre>
<p>Free the resources used by the mutex. The mutex should be unlocked. Destroying a locked mutex results in undefined behaviour.</p>
<p>Does nothing if <code>mutex</code> is <code>NULL</code>.</p>
<h1 id="al_create_cond"><a href="#TOC">al_create_cond</a></h1>
<pre><code>ALLEGRO_COND *al_create_cond(void)
</code></pre>
<p>Create a condition variable.</p>
<p>Returns the condition value on success or <code>NULL</code> on error.</p>
<h1 id="al_destroy_cond"><a 