cial">,</span>
    <span class="identifier">CompletionCondition</span> <span class="identifier">completion_condition</span><span class="special">,</span>
    <span class="identifier">boost</span><span class="special">::</span><span class="identifier">system</span><span class="special">::</span><span class="identifier">error_code</span> <span class="special">&amp;</span> <span class="identifier">ec</span><span class="special">);</span>
</pre>
<p>
          This function is used to read a certain number of by