n class="identifier">implementation_type</span> <span class="special">&amp;</span> <span class="identifier">impl</span><span class="special">)</span> <span class="keyword">const</span><span class="special">;</span>
  <span class="emphasis"><em>&#187; <a class="link" href="expires_from_now/overload1.html" title="waitable_timer_service::expires_from_now (1 of 2 overloads)">more...</a></em></span>
</pre>
<p>
          Set the expiry time for the timer relative to now.
        </p>
<pre class="programlisting"><