[xml] Thread-safety of LibXML2

[GAURAV GUPTA <ya1gaurav gmail com>]

Hello Daniel Veillard,

 

Greetings..

 

First of all I appreciate your work for LibXML.

 

I read XML and found thread-safety issue in xmlCleanupParser() funtion. 

 

WARNING: if your application is multithreaded or has plugin support
 *          calling this may crash the application if another thread or
 *          a plugin is still using libxml2. It's sometimes very hard to
 *          guess if libxml2 is in use in the application, some libraries
 *          or plugins may use it without notice. In case of doubt abstain
 *          from calling this function or do it just before calling exit()
 *          to avoid leak reports from valgrind !

 

 

To avoid such scenarios, I have Implemented reference counting technique to make Libxml2 thread-safe.

I have raised a bug (along with patch) on bugzilla.  (https://bugzilla.gnome.org/show_bug.cgi?id=704439)

 

Please review my patch. I have also attached a sample test case also.

I hope to see my patch in upcoming XML releases.

 

Thanks.

 

--
Regards,
Gaurav