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<title>Chapter 28. Thread</title>
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<div><h2 class="title">
<a name="thread"></a>Chapter 28. Thread</h2></div>
<div><div class="authorgroup"><div class="author"><h3 class="author">
<span class="firstname">Anthony</span> <span class="surname">Williams</span>
</h3></div></div></div>
<div><p class="copyright">Copyright © 2007 -8 Anthony Williams</p></div>
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<a name="thread.legal"></a><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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<p><b>Table of Contents</b></p>
<dl>
<dt><span class="section"><a href="thread.html#thread.overview">Overview</a></span></dt>
<dt><span class="section"><a href="thread/changes.html">Changes since</a></span></dt>
<dt><span class="section"><a href="thread/future.html">Future</a></span></dt>
<dt><span class="section"><a href="thread/thread_management.html">Thread Management</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="thread/thread_management.html#thread.thread_management.thread">Class <code class="computeroutput"><span class="identifier">thread</span></code></a></span></dt>
<dt><span class="section"><a href="thread/thread_management.html#thread.thread_management.this_thread">Namespace <code class="computeroutput"><span class="identifier">this_thread</span></code></a></span></dt>
<dt><span class="section"><a href="thread/thread_management.html#thread.thread_management.threadgroup">Class <code class="computeroutput"><span class="identifier">thread_group</span></code></a></span></dt>
</dl></dd>
<dt><span class="section"><a href="thread/synchronization.html">Synchronization</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="thread/synchronization.html#thread.synchronization.mutex_concepts">Mutex Concepts</a></span></dt>
<dt><span class="section"><a href="thread/synchronization.html#thread.synchronization.locks">Lock Types</a></span></dt>
<dt><span class="section"><a href="thread/synchronization.html#thread.synchronization.lock_functions">Lock functions</a></span></dt>
<dt><span class="section"><a href="thread/synchronization.html#thread.synchronization.mutex_types">Mutex Types</a></span></dt>
<dt><span class="section"><a href="thread/synchronization.html#thread.synchronization.condvar_ref">Condition Variables</a></span></dt>
<dt><span class="section"><a href="thread/synchronization.html#thread.synchronization.once">One-time Initialization</a></span></dt>
<dt><span class="section"><a href="thread/synchronization.html#thread.synchronization.barriers">Barriers</a></span></dt>
<dt><span class="section"><a href="thread/synchronization.html#thread.synchronization.futures">Futures</a></span></dt>
</dl></dd>
<dt><span class="section"><a href="thread/thread_local_storage.html">Thread Local Storage</a></span></dt>
<dd><dl><dt><span class="section"><a href="thread/thread_local_storage.html#thread.thread_local_storage.thread_specific_ptr">Class
<code class="computeroutput"><span class="identifier">thread_specific_ptr</span></code></a></span></dt></dl></dd>
<dt><span class="section"><a href="thread/time.html">Date and Time Requirements</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="thread/time.html#thread.time.system_time">Typedef <code class="computeroutput"><span class="identifier">system_time</span></code></a></span></dt>
<dt><span class="section"><a href="thread/time.html#thread.time.get_system_time">Non-member function <code class="computeroutput"><span class="identifier">get_system_time</span><span class="special">()</span></code></a></span></dt>
</dl></dd>
<dt><span class="section"><a href="thread/acknowledgements.html">Acknowledgments</a></span></dt>
<dt><span class="section"><a href="thread/compliance.html">Compliance with standard</a></span></dt>
<dd><dl>
<dt><span class="section"><a href="thread/compliance.html#thread.compliance.cpp11">C++11 standard Thread library</a></span></dt>
<dt><span class="section"><a href="thread/compliance.html#thread.compliance.shared">Shared Mutex library extension</a></span></dt>
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<div class="section">
<div class="titlepage"><div><div><h2 class="title" style="clear: both">
<a name="thread.overview"></a><a class="link" href="thread.html#thread.overview" title="Overview">Overview</a>
</h2></div></div></div>
<p>
<span class="bold"><strong>Boost.Thread</strong></span> enables the use of multiple threads
of execution with shared data in portable C++ code. It provides classes and
functions for managing the threads themselves, along with others for synchronizing
data between the threads or providing separate copies of data specific to individual
threads.
</p>
<p>
The <span class="bold"><strong>Boost.Thread</strong></span> library was originally written
and designed by William E. Kempf. This version is a major rewrite designed
to closely follow the proposals presented to the C++ Standards Committee, in
particular <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2497.html" target="_top">N2497</a>,
<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2320.html" target="_top">N2320</a>,
<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2184.html" target="_top">N2184</a>,
<a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2139.html" target="_top">N2139</a>,
and <a href="http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2006/n2094.html" target="_top">N2094</a>
</p>
<p>
In order to use the classes and functions described here, you can either include
the specific headers specified by the descriptions of each class or function,
or include the master thread library header:
</p>
<pre class="programlisting"><span class="preprocessor">#include</span> <span class="special"><</span><span class="identifier">boost</span><span class="special">/</span><span class="identifier">thread</span><span class="special">.</span><span class="identifier">hpp</span><span class="special">></span>
</pre>
<p>
which includes all the other headers in turn.
</p>
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