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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_asio.reference.write_at"></a><a class="link" href="write_at.html" title="write_at">write_at</a>
</h3></div></div></div>
<p>
<a class="indexterm" name="boost_asio.indexterm.write_at"></a>
The <code class="computeroutput">write_at</code> function is
a composed operation that writes a certain amount of data at a specified
offset before returning.
</p>
<p>
Write all of the supplied data at the specified offset before returning.
</p>
<pre class="programlisting">template&lt;
typename <a class="link" href="SyncRandomAccessWriteDevice.html" title="Buffer-oriented synchronous random-access write device requirements">SyncRandomAccessWriteDevice</a>,
typename <a class="link" href="ConstBufferSequence.html" title="Constant buffer sequence requirements">ConstBufferSequence</a>&gt;
std::size_t <a class="link" href="write_at/overload1.html" title="write_at (1 of 8 overloads)">write_at</a>(
SyncRandomAccessWriteDevice &amp; d,
uint64_t offset,
const ConstBufferSequence &amp; buffers);
<span class="emphasis"><em>» <a class="link" href="write_at/overload1.html" title="write_at (1 of 8 overloads)">more...</a></em></span>
template&lt;
typename <a class="link" href="SyncRandomAccessWriteDevice.html" title="Buffer-oriented synchronous random-access write device requirements">SyncRandomAccessWriteDevice</a>,
typename <a class="link" href="ConstBufferSequence.html" title="Constant buffer sequence requirements">ConstBufferSequence</a>&gt;
std::size_t <a class="link" href="write_at/overload2.html" title="write_at (2 of 8 overloads)">write_at</a>(
SyncRandomAccessWriteDevice &amp; d,
uint64_t offset,
const ConstBufferSequence &amp; buffers,
boost::system::error_code &amp; ec);
<span class="emphasis"><em>» <a class="link" href="write_at/overload2.html" title="write_at (2 of 8 overloads)">more...</a></em></span>
</pre>
<p>
Write a certain amount of data at a specified offset before returning.
</p>
<pre class="programlisting">template&lt;
typename <a class="link" href="SyncRandomAccessWriteDevice.html" title="Buffer-oriented synchronous random-access write device requirements">SyncRandomAccessWriteDevice</a>,
typename <a class="link" href="ConstBufferSequence.html" title="Constant buffer sequence requirements">ConstBufferSequence</a>,
typename <a class="link" href="CompletionCondition.html" title="Completion condition requirements">CompletionCondition</a>&gt;
std::size_t <a class="link" href="write_at/overload3.html" title="write_at (3 of 8 overloads)">write_at</a>(
SyncRandomAccessWriteDevice &amp; d,
uint64_t offset,
const ConstBufferSequence &amp; buffers,
CompletionCondition completion_condition);
<span class="emphasis"><em>» <a class="link" href="write_at/overload3.html" title="write_at (3 of 8 overloads)">more...</a></em></span>
template&lt;
typename <a class="link" href="SyncRandomAccessWriteDevice.html" title="Buffer-oriented synchronous random-access write device requirements">SyncRandomAccessWriteDevice</a>,
typename <a class="link" href="ConstBufferSequence.html" title="Constant buffer sequence requirements">ConstBufferSequence</a>,
typename <a class="link" href="CompletionCondition.html" title="Completion condition requirements">CompletionCondition</a>&gt;
std::size_t <a class="link" href="write_at/overload4.html" title="write_at (4 of 8 overloads)">write_at</a>(
SyncRandomAccessWriteDevice &amp; d,
uint64_t offset,
const ConstBufferSequence &amp; buffers,
CompletionCondition completion_condition,
boost::system::error_code &amp; ec);
<span class="emphasis"><em>» <a class="link" href="write_at/overload4.html" title="write_at (4 of 8 overloads)">more...</a></em></span>
</pre>
<p>
Write all of the supplied data at the specified offset before returning.
</p>
<pre class="programlisting">template&lt;
typename <a class="link" href="SyncRandomAccessWriteDevice.html" title="Buffer-oriented synchronous random-access write device requirements">SyncRandomAccessWriteDevice</a>,
typename Allocator&gt;
std::size_t <a class="link" href="write_at/overload5.html" title="write_at (5 of 8 overloads)">write_at</a>(
SyncRandomAccessWriteDevice &amp; d,
uint64_t offset,
basic_streambuf&lt; Allocator &gt; &amp; b);
<span class="emphasis"><em>» <a class="link" href="write_at/overload5.html" title="write_at (5 of 8 overloads)">more...</a></em></span>
template&lt;
typename <a class="link" href="SyncRandomAccessWriteDevice.html" title="Buffer-oriented synchronous random-access write device requirements">SyncRandomAccessWriteDevice</a>,
typename Allocator&gt;
std::size_t <a class="link" href="write_at/overload6.html" title="write_at (6 of 8 overloads)">write_at</a>(
SyncRandomAccessWriteDevice &amp; d,
uint64_t offset,
basic_streambuf&lt; Allocator &gt; &amp; b,
boost::system::error_code &amp; ec);
<span class="emphasis"><em>» <a class="link" href="write_at/overload6.html" title="write_at (6 of 8 overloads)">more...</a></em></span>
</pre>
<p>
Write a certain amount of data at a specified offset before returning.
</p>
<pre class="programlisting">template&lt;
typename <a class="link" href="SyncRandomAccessWriteDevice.html" title="Buffer-oriented synchronous random-access write device requirements">SyncRandomAccessWriteDevice</a>,
typename Allocator,
typename <a class="link" href="CompletionCondition.html" title="Completion condition requirements">CompletionCondition</a>&gt;
std::size_t <a class="link" href="write_at/overload7.html" title="write_at (7 of 8 overloads)">write_at</a>(
SyncRandomAccessWriteDevice &amp; d,
uint64_t offset,
basic_streambuf&lt; Allocator &gt; &amp; b,
CompletionCondition completion_condition);
<span class="emphasis"><em>» <a class="link" href="write_at/overload7.html" title="write_at (7 of 8 overloads)">more...</a></em></span>
template&lt;
typename <a class="link" href="SyncRandomAccessWriteDevice.html" title="Buffer-oriented synchronous random-access write device requirements">SyncRandomAccessWriteDevice</a>,
typename Allocator,
typename <a class="link" href="CompletionCondition.html" title="Completion condition requirements">CompletionCondition</a>&gt;
std::size_t <a class="link" href="write_at/overload8.html" title="write_at (8 of 8 overloads)">write_at</a>(
SyncRandomAccessWriteDevice &amp; d,
uint64_t offset,
basic_streambuf&lt; Allocator &gt; &amp; b,
CompletionCondition completion_condition,
boost::system::error_code &amp; ec);
<span class="emphasis"><em>» <a class="link" href="write_at/overload8.html" title="write_at (8 of 8 overloads)">more...</a></em></span>
</pre>
<h5>
<a name="boost_asio.reference.write_at.h0"></a>
<span class="phrase"><a name="boost_asio.reference.write_at.requirements"></a></span><a class="link" href="write_at.html#boost_asio.reference.write_at.requirements">Requirements</a>
</h5>
<p>
<span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/write_at.hpp</code>
</p>
<p>
<span class="emphasis"><em>Convenience header: </em></span><code class="literal">boost/asio.hpp</code>
</p>
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<td align="right"><div class="copyright-footer">Copyright © 2003-2021 Christopher
M. Kohlhoff<p>
Distributed under the Boost Software License, Version 1.0. (See accompanying
file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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