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<div class="section" title="posix::descriptor_base">
<div class="titlepage"><div><div><h3 class="title">
<a name="boost_asio.reference.posix__descriptor_base"></a><a class="link" href="posix__descriptor_base.html" title="posix::descriptor_base"> posix::descriptor_base</a>
</h3></div></div></div>
<p>
The <a class="link" href="posix__descriptor_base.html" title="posix::descriptor_base"><code class="computeroutput"><span class="identifier">posix</span><span class="special">::</span><span class="identifier">descriptor_base</span></code></a> class is used as
a base for the <a class="link" href="posix__basic_stream_descriptor.html" title="posix::basic_stream_descriptor"><code class="computeroutput"><span class="identifier">posix</span><span class="special">::</span><span class="identifier">basic_stream_descriptor</span></code></a> class template
so that we have a common place to define the associated IO control commands.
</p>
<pre class="programlisting"><span class="keyword">class</span> <span class="identifier">descriptor_base</span>
</pre>
<a name="boost_asio.reference.posix__descriptor_base.types"></a><h5>
<a name="id1048142"></a>
<a class="link" href="posix__descriptor_base.html#boost_asio.reference.posix__descriptor_base.types">Types</a>
</h5>
<div class="informaltable"><table class="table">
<colgroup>
<col>
<col>
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<thead><tr>
<th>
<p>
Name
</p>
</th>
<th>
<p>
Description
</p>
</th>
</tr></thead>
<tbody>
<tr>
<td>
<p>
<a class="link" href="posix__descriptor_base/bytes_readable.html" title="posix::descriptor_base::bytes_readable"><span class="bold"><strong>bytes_readable</strong></span></a>
</p>
</td>
<td>
<p>
IO control command to get the amount of data that can be read without
blocking.
</p>
</td>
</tr>
<tr>
<td>
<p>
<a class="link" href="posix__descriptor_base/non_blocking_io.html" title="posix::descriptor_base::non_blocking_io"><span class="bold"><strong>non_blocking_io</strong></span></a>
</p>
</td>
<td>
<p>
IO control command to set the blocking mode of the descriptor.
</p>
</td>
</tr>
</tbody>
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<a name="boost_asio.reference.posix__descriptor_base.protected_member_functions"></a><h5>
<a name="id1048257"></a>
<a class="link" href="posix__descriptor_base.html#boost_asio.reference.posix__descriptor_base.protected_member_functions">Protected
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="posix__descriptor_base/_descriptor_base.html" title="posix::descriptor_base::~descriptor_base"><span class="bold"><strong>~descriptor_base</strong></span></a>
</p>
</td>
<td>
<p>
Protected destructor to prevent deletion through this type.
</p>
</td>
</tr></tbody>
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<a name="boost_asio.reference.posix__descriptor_base.requirements"></a><h5>
<a name="id1048612"></a>
<a class="link" href="posix__descriptor_base.html#boost_asio.reference.posix__descriptor_base.requirements">Requirements</a>
</h5>
<p>
<span class="bold"><strong>Header: </strong></span><code class="literal">boost/asio/posix/descriptor_base.hpp</code>
</p>
<p>
<span class="bold"><strong>Convenience header: </strong></span><code class="literal">boost/asio.hpp</code>
</p>
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<td align="right"><div class="copyright-footer">Copyright © 2003 - 2010 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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