>async_read_at</a>(
    AsyncRandomAccessReadDevice &amp; d,
    uint64_t offset,
    basic_streambuf&lt; Allocator &gt; &amp; b,
    CompletionCondition completion_condition,
    ReadHandler &amp;&amp; handler);
  <span class="emphasis"><em>&#187; <a class="link" href="async_read_at/overload4.html" title="async_read_at (4 of 4 overloads)">more...</a></em></span>
</pre>
<h5>
<a name="boost_asio.reference.async_read_at.h0"></a>
        <span class="phrase"><a name="boost_asio.reference.async_read_at.requirem