">io_service</span><span class="special">::</span><span class="identifier">fork_parent</span><span class="special">);</span>
  <span class="special">...</span>
<span class="special">}</span>
</pre>
<p>
          User-defined services can also be made fork-aware by overriding the <code class="computeroutput"><span class="identifier">io_service</span><span class="special">::</span><span class="identifier">service</span><span class="special">::</span><span class="identifier">fork_service</span><span class="spe