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<title>buffered_write_stream</title>
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<div class="titlepage"><div><div><h3 class="title">
<a name="boost_asio.reference.buffered_write_stream"></a><a class="link" href="buffered_write_stream.html" title="buffered_write_stream">buffered_write_stream</a>
</h3></div></div></div>
<p>
Adds buffering to the write-related operations of a stream.
</p>
<pre class="programlisting">template<
typename Stream>
class buffered_write_stream :
noncopyable
</pre>
<h5>
<a name="boost_asio.reference.buffered_write_stream.h0"></a>
<span class="phrase"><a name="boost_asio.reference.buffered_write_stream.types"></a></span><a class="link" href="buffered_write_stream.html#boost_asio.reference.buffered_write_stream.types">Types</a>
</h5>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Name
</p>
</th>
<th>
<p>
Description
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/executor_type.html" title="buffered_write_stream::executor_type"><span class="bold"><strong>executor_type</strong></span></a>
</p>
</td>
<td>
<p>
The type of the executor associated with the object.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/lowest_layer_type.html" title="buffered_write_stream::lowest_layer_type"><span class="bold"><strong>lowest_layer_type</strong></span></a>
</p>
</td>
<td>
<p>
The type of the lowest layer.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/next_layer_type.html" title="buffered_write_stream::next_layer_type"><span class="bold"><strong>next_layer_type</strong></span></a>
</p>
</td>
<td>
<p>
The type of the next layer.
</p>
</td>
</tr>
</tbody>
</table></div>
<h5>
<a name="boost_asio.reference.buffered_write_stream.h1"></a>
<span class="phrase"><a name="boost_asio.reference.buffered_write_stream.member_functions"></a></span><a class="link" href="buffered_write_stream.html#boost_asio.reference.buffered_write_stream.member_functions">Member
Functions</a>
</h5>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Name
</p>
</th>
<th>
<p>
Description
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/async_flush.html" title="buffered_write_stream::async_flush"><span class="bold"><strong>async_flush</strong></span></a>
</p>
</td>
<td>
<p>
Start an asynchronous flush.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/async_read_some.html" title="buffered_write_stream::async_read_some"><span class="bold"><strong>async_read_some</strong></span></a>
</p>
</td>
<td>
<p>
Start an asynchronous read. The buffer into which the data will
be read must be valid for the lifetime of the asynchronous operation.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/async_write_some.html" title="buffered_write_stream::async_write_some"><span class="bold"><strong>async_write_some</strong></span></a>
</p>
</td>
<td>
<p>
Start an asynchronous write. The data being written must be valid
for the lifetime of the asynchronous operation.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/buffered_write_stream.html" title="buffered_write_stream::buffered_write_stream"><span class="bold"><strong>buffered_write_stream</strong></span></a>
</p>
</td>
<td>
<p>
Construct, passing the specified argument to initialise the next
layer.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/close.html" title="buffered_write_stream::close"><span class="bold"><strong>close</strong></span></a>
</p>
</td>
<td>
<p>
Close the stream.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/flush.html" title="buffered_write_stream::flush"><span class="bold"><strong>flush</strong></span></a>
</p>
</td>
<td>
<p>
Flush all data from the buffer to the next layer. Returns the number
of bytes written to the next layer on the last write operation.
Throws an exception on failure.
</p>
<p>
Flush all data from the buffer to the next layer. Returns the number
of bytes written to the next layer on the last write operation,
or 0 if an error occurred.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/get_executor.html" title="buffered_write_stream::get_executor"><span class="bold"><strong>get_executor</strong></span></a>
</p>
</td>
<td>
<p>
Get the executor associated with the object.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/get_io_context.html" title="buffered_write_stream::get_io_context"><span class="bold"><strong>get_io_context</strong></span></a>
</p>
</td>
<td>
<p>
(Deprecated: Use get_executor().) Get the io_context associated
with the object.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/get_io_service.html" title="buffered_write_stream::get_io_service"><span class="bold"><strong>get_io_service</strong></span></a>
</p>
</td>
<td>
<p>
(Deprecated: Use get_executor().) Get the io_context associated
with the object.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/in_avail.html" title="buffered_write_stream::in_avail"><span class="bold"><strong>in_avail</strong></span></a>
</p>
</td>
<td>
<p>
Determine the amount of data that may be read without blocking.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/lowest_layer.html" title="buffered_write_stream::lowest_layer"><span class="bold"><strong>lowest_layer</strong></span></a>
</p>
</td>
<td>
<p>
Get a reference to the lowest layer.
</p>
<p>
Get a const reference to the lowest layer.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/next_layer.html" title="buffered_write_stream::next_layer"><span class="bold"><strong>next_layer</strong></span></a>
</p>
</td>
<td>
<p>
Get a reference to the next layer.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/peek.html" title="buffered_write_stream::peek"><span class="bold"><strong>peek</strong></span></a>
</p>
</td>
<td>
<p>
Peek at the incoming data on the stream. Returns the number of
bytes read. Throws an exception on failure.
</p>
<p>
Peek at the incoming data on the stream. Returns the number of
bytes read, or 0 if an error occurred.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/read_some.html" title="buffered_write_stream::read_some"><span class="bold"><strong>read_some</strong></span></a>
</p>
</td>
<td>
<p>
Read some data from the stream. Returns the number of bytes read.
Throws an exception on failure.
</p>
<p>
Read some data from the stream. Returns the number of bytes read
or 0 if an error occurred.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="buffered_write_stream/write_some.html" title="buffered_write_stream::write_some"><span class="bold"><strong>write_some</strong></span></a>
</p>
</td>
<td>
<p>
Write the given data to the stream. Returns the number of bytes
written. Throws an exception on failure.
</p>
<p>
Write the given data to the stream. Returns the number of bytes
written, or 0 if an error occurred and the error handler did not
throw.
</p>
</td>
</tr>
</tbody>
</table></div>
<h5>
<a name="boost_asio.reference.buffered_write_stream.h2"></a>
<span class="phrase"><a name="boost_asio.reference.buffered_write_stream.data_members"></a></span><a class="link" href="buffered_write_stream.html#boost_asio.reference.buffered_write_stream.data_members">Data Members</a>
</h5>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
</colgroup>
<thead><tr>
<th>
<p>
Name
</p>
</th>
<th>
<p>
Description
</p>
</th>
</tr></thead>
<tbody><tr>
<td>
<p>
<a class="link" href="buffered_write_stream/default_buffer_size.html" title="buffered_write_stream::default_buffer_size"><span class="bold"><strong>default_buffer_size</strong></span></a>
</p>
</td>
<td>
<p>
The default buffer size.
</p>
</td>
</tr></tbody>
</table></div>
<p>
The <a class="link" href="buffered_write_stream.html" title="buffered_write_stream"><code class="computeroutput">buffered_write_stream</code></a>
class template can be used to add buffering to the synchronous and asynchronous
write operations of a stream.
</p>
<h5>
<a name="boost_asio.reference.buffered_write_stream.h3"></a>
<span class="phrase"><a name="boost_asio.reference.buffered_write_stream.thread_safety"></a></span><a class="link" href="buffered_write_stream.html#boost_asio.reference.buffered_write_stream.thread_safety">Thread
Safety</a>
</h5>
<p>
<span class="emphasis"><em>Distinct</em></span> <span class="emphasis"><em>objects:</em></span> Safe.
</p>
<p>
<span class="emphasis"><em>Shared</em></span> <span class="emphasis"><em>objects:</em></span> Unsafe.
</p>
<h5>
<a name="boost_asio.reference.buffered_write_stream.h4"></a>
<span class="phrase"><a name="boost_asio.reference.buffered_write_stream.requirements"></a></span><a class="link" href="buffered_write_stream.html#boost_asio.reference.buffered_write_stream.requirements">Requirements</a>
</h5>
<p>
<span class="emphasis"><em>Header: </em></span><code class="literal">boost/asio/buffered_write_stream.hpp</code>
</p>
<p>
<span class="emphasis"><em>Convenience header: </em></span><code class="literal">boost/asio.hpp</code>
</p>
</div>
<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
<td align="left"></td>
<td align="right"><div class="copyright-footer">Copyright © 2003-2018 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>)
</p>
</div></td>
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