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gerrit-public.fairphone.software / platform / external / libxml2 / 043620e1cbee6d76781811803e6468640c273ce4 / . / doc / threads.html
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14<title>Thread safety</title>
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Daniel Veillard8f40f1e2002-08-28 21:18:45 +0000[diff] [blame]19<a href="http://www.gnome.org/"><img src="gnome2.png" alt="Gnome2 Logo"></a><a href="http://www.w3.org/Status"><img src="w3c.png" alt="W3C Logo"></a><a href="http://www.redhat.com/"><img src="redhat.gif" alt="Red Hat Logo"></a><div align="left"><a href="http://xmlsoft.org/"><img src="Libxml2-Logo-180x168.gif" alt="Made with Libxml2 Logo"></a></div>
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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>
25</tr></table>
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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 Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]42<li><a href="architecture.html">libxml architecture</a></li>
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Daniel Veillardfc59c092002-06-05 14:48:26 +0000[diff] [blame]58<li><a href="tutorial/index.html">Tutorial</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]80<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]81<tr><td bgcolor="#fffacd"><ul>
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]82<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://www.aleksey.com/xmlsec/">XML-DSig xmlsec</a></li>
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87<li><a href="http://www.fh-frankfurt.de/~igor/projects/libxml/">Windows binaries</a></li>
Daniel Veillarddb9dfd92001-11-26 17:25:02 +0000[diff] [blame]88<li><a href="http://garypennington.net/libxml2/">Solaris binaries</a></li>
Daniel Veillardcb7543b2002-09-09 10:54:06 +0000[diff] [blame]89<li><a href="http://www.zveno.com/open_source/libxml2xslt.html">MacOsX binaries</a></li>
Daniel Veillarde6d8e202002-05-02 06:11:10 +0000[diff] [blame]90<li><a href="http://sourceforge.net/projects/libxml2-pas/">Pascal bindings</a></li>
Daniel Veillard2d347fa2002-03-17 10:34:11 +0000[diff] [blame]91<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]92</ul></td></tr>
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Daniel Veillard63d83142002-05-20 06:51:05 +0000[diff] [blame]96<p>Starting with 2.4.7, libxml makes provisions to ensure that concurrent
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]97threads can safely work in parallel parsing different documents. There is
98however a couple of things to do to ensure it:</p>
99<ul>
100<li>configure the library accordingly using the --with-threads options</li>
Daniel Veillard0b28e882002-07-24 23:47:05 +0000[diff] [blame]101 <li>call xmlInitParser() in the &quot;main&quot; thread before using any of the
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]102 libxml API (except possibly selecting a different memory allocator)</li>
103</ul>
104<p>Note that the thread safety cannot be ensured for multiple threads sharing
105the same document, the locking must be done at the application level, libxml
106exports a basic mutex and reentrant mutexes API in &lt;libxml/threads.h&gt;.
107The parts of the library checked for thread safety are:</p>
108<ul>
109<li>concurrent loading</li>
Daniel Veillard0b28e882002-07-24 23:47:05 +0000[diff] [blame]110 <li>file access resolution</li>
111 <li>catalog access</li>
112 <li>catalog building</li>
113 <li>entities lookup/accesses</li>
114 <li>validation</li>
115 <li>global variables per-thread override</li>
116 <li>memory handling</li>
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]117</ul>
118<p>XPath is supposed to be thread safe now, but this wasn't tested
119seriously.</p>
Daniel Veillard3f4c40f2002-02-13 09:19:28 +0000[diff] [blame]120<p><a href="bugs.html">Daniel Veillard</a></p>
Daniel Veillard52dcab32001-10-30 12:51:17 +0000[diff] [blame]121</td></tr></table></td></tr></table></td></tr></table></td>
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