link" href="async_write_at/overload2.html" title="async_write_at (2 of 4 overloads)">async_write_at</a><span class="special">(</span>
    <span class="identifier">AsyncRandomAccessWriteDevice</span> <span class="special">&amp;</span> <span class="identifier">d</span><span class="special">,</span>
    <span class="identifier">boost</span><span class="special">::</span><span class="identifier">uint64_t</span> <span class="identifier">offset</span><span class="special">,</span>
    <span class="keyword">const<