</code> <a href="Mutex.html">..</a> <code class="code"><span class="keyword">end</span></code></pre>Locks for mutual exclusion.
<p>

   Mutexes (mutual-exclusion locks) are used to implement critical sections
   and protect shared mutable data structures against concurrent accesses.
   The typical use is (if <code class="code">m</code> is the mutex associated with the data structure
   <code class="code"><span class="constructor">D</span></code>):
   <code class="code">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<span cl