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<title>Is Boost.Python thread-aware/compatible with multiple interpreters?</title>
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<div class="titlepage"><div><div><h3 class="title">
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<a name="faq.is_boost_python_thread_aware_com"></a><a class="link" href="is_boost_python_thread_aware_com.html" title="Is Boost.Python thread-aware/compatible with multiple interpreters?">Is Boost.Python
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thread-aware/compatible with multiple interpreters?</a>
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</h3></div></div></div>
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<p>
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<span class="emphasis"><em>Niall Douglas provides these notes:</em></span>
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</p>
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<p>
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The quick answer to this is: no.
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</p>
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<p>
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The longer answer is that it can be patched to be so, but it's complex. You
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will need to add custom lock/unlock wrapping of every time your code enters
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Boost.Python (particularly every virtual function override) plus heavily
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modify <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">python</span><span class="special">/</span><span class="identifier">detail</span><span class="special">/</span><span class="identifier">invoke</span><span class="special">.</span><span class="identifier">hpp</span></code> with custom unlock/lock wrapping of
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every time Boost.Python enters your code. You must furthermore take care
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to <span class="emphasis"><em>not</em></span> unlock/lock when Boost.Python is invoking iterator
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changes via <code class="computeroutput"><span class="identifier">invoke</span><span class="special">.</span><span class="identifier">hpp</span></code>.
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</p>
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<p>
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There is a patched <code class="computeroutput"><span class="identifier">invoke</span><span class="special">.</span><span class="identifier">hpp</span></code> posted
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on the C++-SIG mailing list archives and you can find a real implementation
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of all the machinery necessary to fully implement this in the TnFOX project
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at <a href="http://sourceforge.net/projects/tnfox/" target="_top">this</a> SourceForge
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project location.
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</p>
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<td align="right"><div class="copyright-footer">Copyright © 2002-2015 David
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Abrahams, Stefan Seefeld<p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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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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