</span>&nbsp;<span class="constructor">TCOFLUSH</span>&nbsp;<span class="keywordsign">|</span>&nbsp;<span class="constructor">TCIOFLUSH</span><br>
&nbsp;&nbsp;<span class="keyword">val</span>&nbsp;tcflush&nbsp;:&nbsp;<span class="constructor">UnixLabels</span>.file_descr&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;mode:<span class="constructor">UnixLabels</span>.flush_queue&nbsp;<span class="keywordsign">-&gt;</span>&nbsp;unit<br>
&nbsp;&nbsp;<span class="keyword">type</span>&nbsp;flow_action&nbsp;=&nb