an class="keyword">template</span><span class="special">&lt;</span>
    <span class="keyword">typename</span> <a class="link" href="../SignalHandler.html" title="Signal handler requirements">SignalHandler</a><span class="special">&gt;</span>
<span class="keyword">void</span> <span class="identifier">async_wait</span><span class="special">(</span>
    <span class="identifier">implementation_type</span> <span class="special">&amp;</span> <span class="identifier">impl</span><span class="special">,</span>
    <