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gerrit-public.fairphone.software / fp2-dev / platform / external / libxml2 / 0b28e88eb9285def35d2f1201a932014b717c3d3 / . / doc / threads.html
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14<title>Thread safety</title>
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22<h1>The XML C library for Gnome</h1>
23<h2>Thread safety</h2>
24</td></tr></table></td></tr></table></td>
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29<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]30<tr><td bgcolor="#fffacd"><ul>
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]31<li><a href="index.html">Home</a></li>
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Daniel Veillard6dbcaf82002-02-20 14:37:47 +0000[diff] [blame]41<li><a href="python.html">Python and bindings</a></li>
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]42<li><a href="architecture.html">libxml architecture</a></li>
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Daniel Veillard3bf65be2002-01-23 12:36:34 +0000[diff] [blame]65<tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>API Indexes</b></center></td></tr>
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Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]75<tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>Related links</b></center></td></tr>
Daniel Veillard8acca112002-01-21 09:52:27 +0000[diff] [blame]76<tr><td bgcolor="#fffacd"><ul>
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]77<li><a href="http://mail.gnome.org/archives/xml/">Mail archive</a></li>
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Daniel Veillard2d347fa2002-03-17 10:34:11 +0000[diff] [blame]85<li><a href="http://bugzilla.gnome.org/buglist.cgi?product=libxml&amp;product=libxml2">Bug Tracker</a></li>
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]86</ul></td></tr>
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Daniel Veillard63d83142002-05-20 06:51:05 +0000[diff] [blame]90<p>Starting with 2.4.7, libxml makes provisions to ensure that concurrent
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]91threads can safely work in parallel parsing different documents. There is
92however a couple of things to do to ensure it:</p>
93<ul>
94<li>configure the library accordingly using the --with-threads options</li>
Daniel Veillard0b28e882002-07-24 23:47:05 +0000[diff] [blame^]95 <li>call xmlInitParser() in the &quot;main&quot; thread before using any of the
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]96 libxml API (except possibly selecting a different memory allocator)</li>
97</ul>
98<p>Note that the thread safety cannot be ensured for multiple threads sharing
99the same document, the locking must be done at the application level, libxml
100exports a basic mutex and reentrant mutexes API in &lt;libxml/threads.h&gt;.
101The parts of the library checked for thread safety are:</p>
102<ul>
103<li>concurrent loading</li>
Daniel Veillard0b28e882002-07-24 23:47:05 +0000[diff] [blame^]104 <li>file access resolution</li>
105 <li>catalog access</li>
106 <li>catalog building</li>
107 <li>entities lookup/accesses</li>
108 <li>validation</li>
109 <li>global variables per-thread override</li>
110 <li>memory handling</li>
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]111</ul>
112<p>XPath is supposed to be thread safe now, but this wasn't tested
113seriously.</p>
Daniel Veillard3f4c40f2002-02-13 09:19:28 +0000[diff] [blame]114<p><a href="bugs.html">Daniel Veillard</a></p>
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]115</td></tr></table></td></tr></table></td></tr></table></td>
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