ate</span> <span class="special">&lt;</span><span class="keyword">typename</span> <span class="identifier">Handler</span><span class="special">&gt;</span>
<span class="keyword">struct</span> <span class="identifier">sendfile_op</span>
<span class="special">{</span>
  <span class="identifier">tcp</span><span class="special">::</span><span class="identifier">socket</span><span class="special">&amp;</span> <span class="identifier">sock_</span><span class="special">;</span>
  <span class="keyword">int</span> <s