hatever shutdown/cancellation step.</li>
</ul>
<p >Items are extensively logged on <code>*logger_ptr</code>, and we follow the normal best practices to avoid verbose messages at the severities strictly higher than <code>TRACE</code>. In particular, any error is logged as a <code>WARNING</code>, so in particular there's no need to for caller to specifically log about the details of a non-false <code>Error_code</code>.</p>
<p >Thread safety is identical to that of <code>async_write_some()</code>.</p>
<h3>Feat