tes. Consider
          using the <a class="link" href="../async_read.html" title="async_read"><code class="computeroutput">async_read</code></a>
          function if you need to ensure that the requested amount of data is read
          before the asynchronous operation completes.
        </p>
<h6>
<a name="boost_asio.reference.posix__stream_descriptor.async_read_some.h2"></a>
          <span class="phrase"><a name="boost_asio.reference.posix__stream_descriptor.async_read_some.example"></a></span><a class