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gerrit-public.fairphone.software / platform / external / libxml2 / d455d79d84f218003f562f129ad6d3212a4c50cc / . / doc / threads.html
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13<title>Thread safety</title>
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21<h1>The XML C library for Gnome</h1>
22<h2>Thread safety</h2>
23</td></tr></table></td></tr></table></td>
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28<tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>Main Menu</b></center></td></tr>
Daniel Veillard8acca112002-01-21 09:52:27 +0000[diff] [blame]29<tr><td bgcolor="#fffacd"><ul>
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]30<li><a href="index.html">Home</a></li>
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Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]72<tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>Related links</b></center></td></tr>
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85<p>Starting with 2.4.7, libxml makes provisions to ensure that concurent
86threads can safely work in parallel parsing different documents. There is
87however a couple of things to do to ensure it:</p>
88<ul>
89<li>configure the library accordingly using the --with-threads options</li>
90<li>call xmlInitParser() in the &quot;main&quot; thread before using any of the
91 libxml API (except possibly selecting a different memory allocator)</li>
92</ul>
93<p>Note that the thread safety cannot be ensured for multiple threads sharing
94the same document, the locking must be done at the application level, libxml
95exports a basic mutex and reentrant mutexes API in &lt;libxml/threads.h&gt;.
96The parts of the library checked for thread safety are:</p>
97<ul>
98<li>concurrent loading</li>
99<li>file access resolution</li>
100<li>catalog access</li>
101<li>catalog building</li>
102<li>entities lookup/accesses</li>
103<li>validation</li>
104<li>global variables per-thread override</li>
105<li>memory handling</li>
106</ul>
107<p>XPath is supposed to be thread safe now, but this wasn't tested
108seriously.</p>
109<p><a href="mailto:daniel@veillard.com">Daniel Veillard</a></p>
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