ther thread unlocks
   the mutex.<br>
</div>
<pre><span id="VALtry_lock"><span class="keyword">val</span> try_lock</span> : <code class="type"><a href="Mutex.html#TYPEt">t</a> -&gt; bool</code></pre><div class="info">
Same as <a href="Mutex.html#VALlock"><code class="code"><span class="constructor">Mutex</span>.lock</code></a>, but does not suspend the calling thread if
   the mutex is already locked: just return <code class="code"><span class="keyword">false</span></code> immediately
   in that case. If th