> or <code class="mendoza-code">thread/new</code>.
</p>
<h2>Blocking and non-blocking sends and receives
</h2>
<p>All sends and receives can be blocking or non-blocking by providing an optional
timeout value. A timeout of <code class="mendoza-code">0</code> makes
<code class="mendoza-code">(thread/send to msg &amp;opt timeout)</code> and
<code class="mendoza-code">(thread/receive &amp;opt timeout)</code> non-blocking, while a positive timeout
value indicates a blocking send or receive that will resume the c