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</style><title>Thread safety</title></head><body bgcolor="#8b7765" text="#000000" link="#a06060" vlink="#000000"> |    | The XML C parser and toolkit of GnomeThread safety |
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| Starting with 2.4.7, libxml2 makes provisions to ensure that concurrent |
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threads can safely work in parallel parsing different documents. There is
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however a couple of things to do to ensure it:
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configure the library accordingly using the --with-threads options
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call xmlInitParser() in the "main" thread before using any of the
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libxml2 API (except possibly selecting a different memory allocator)
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Note that the thread safety cannot be ensured for multiple threads sharing
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the same document, the locking must be done at the application level, libxml
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exports a basic mutex and reentrant mutexes API in <libxml/threads.h>.
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The parts of the library checked for thread safety are:
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concurrent loading
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file access resolution
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catalog access
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catalog building
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entities lookup/accesses
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validation
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global variables per-thread override
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memory handling
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XPath has been tested for threaded usage on non-modified document
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for example when using libxslt, but make 100% sure the documents
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are accessed read-only !Daniel Veillard </body></html>
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