 of the use of await-timeout!:
</p><div class="example">
<pre class="example">(set-default-event-loop!) ;; if none has yet been set
(a-sync (lambda (await resume)
	  (simple-format #t
			 &quot;Timeout ~A\n&quot;
			 (await-timeout! await resume
					 100
					 (lambda ()
					   &quot;expired&quot;)))))
(event-loop-run!)
</pre></div>
</dd></dl>

<dl class="def">
<dt id="index-await_002dsleep_0021"><span class="category">Scheme Procedure: </span><span><strong>await-sleep!</strong> <em>await resume [loop] ms