n><span class="special">()</span> <span class="special">==</span> <span class="number">0</span><span class="special">)</span>
<span class="special">{</span>
  <span class="identifier">io_service_</span><span class="special">.</span><span class="identifier">notify_fork</span><span class="special">(</span><span class="identifier">boost</span><span class="special">::</span><span class="identifier">asio</span><span class="special">::</span><span class="identifier">io_service</span><span class="special">::</span