="link" href="../../reference/async_read_at.html" title="async_read_at">async_read_at()</a>,
          <a class="link" href="../../reference/write_at.html" title="write_at">write_at()</a> and <a class="link" href="../../reference/async_write_at.html" title="async_write_at">async_write_at()</a> have
          been created to repeatedly call the corresponding <code class="literal"><span class="bold"><strong>*</strong></span>_some_at()</code>
          function until all data has been transferred.
        </p>