1<html> 2<head> 3<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> 4<title>Is Boost.Python thread-aware/compatible with multiple interpreters?</title> 5<link rel="stylesheet" href="../boostbook.css" type="text/css"> 6<meta name="generator" content="DocBook XSL Stylesheets V1.79.1"> 7<link rel="home" href="../index.html" title="Boost.Python"> 8<link rel="up" href="../faq.html" title="Chapter 5. Frequently Asked Questions (FAQs)"> 9<link rel="prev" href="why_is_my_automatic_to_python_co.html" title="Why is my automatic to-python conversion not being found?"> 10<link rel="next" href="../glossary.html" title="Chapter 6. Glossary"> 11</head> 12<body bgcolor="white" text="black" link="#0000FF" vlink="#840084" alink="#0000FF"> 13<table cellpadding="2" width="100%"><tr><td valign="top"><img alt="" width="" height="" src="../images/boost.png"></td></tr></table> 14<hr> 15<div class="spirit-nav"> 16<a accesskey="p" href="why_is_my_automatic_to_python_co.html"><img src="../images/prev.png" alt="Prev"></a><a accesskey="u" href="../faq.html"><img src="../images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../images/home.png" alt="Home"></a><a accesskey="n" href="../glossary.html"><img src="../images/next.png" alt="Next"></a> 17</div> 18<div class="section"> 19<div class="titlepage"><div><div><h3 class="title"> 20<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 21 thread-aware/compatible with multiple interpreters?</a> 22</h3></div></div></div> 23<p> 24 <span class="emphasis"><em>Niall Douglas provides these notes:</em></span> 25 </p> 26<p> 27 The quick answer to this is: no. 28 </p> 29<p> 30 The longer answer is that it can be patched to be so, but it's complex. You 31 will need to add custom lock/unlock wrapping of every time your code enters 32 Boost.Python (particularly every virtual function override) plus heavily 33 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 34 every time Boost.Python enters your code. You must furthermore take care 35 to <span class="emphasis"><em>not</em></span> unlock/lock when Boost.Python is invoking iterator 36 changes via <code class="computeroutput"><span class="identifier">invoke</span><span class="special">.</span><span class="identifier">hpp</span></code>. 37 </p> 38<p> 39 There is a patched <code class="computeroutput"><span class="identifier">invoke</span><span class="special">.</span><span class="identifier">hpp</span></code> posted 40 on the C++-SIG mailing list archives and you can find a real implementation 41 of all the machinery necessary to fully implement this in the TnFOX project 42 at <a href="http://sourceforge.net/projects/tnfox/" target="_top">this</a> SourceForge 43 project location. 44 </p> 45</div> 46<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr> 47<td align="left"></td> 48<td align="right"><div class="copyright-footer">Copyright © 2002-2015 David 49 Abrahams, Stefan Seefeld<p> 50 Distributed under the Boost Software License, Version 1.0. (See accompanying 51 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>) 52 </p> 53</div></td> 54</tr></table> 55<hr> 56<div class="spirit-nav"> 57<a accesskey="p" href="why_is_my_automatic_to_python_co.html"><img src="../images/prev.png" alt="Prev"></a><a accesskey="u" href="../faq.html"><img src="../images/up.png" alt="Up"></a><a accesskey="h" href="../index.html"><img src="../images/home.png" alt="Home"></a><a accesskey="n" href="../glossary.html"><img src="../images/next.png" alt="Next"></a> 58</div> 59</body> 60</html> 61
