Re: [xml] New libxml which is reentrant ?

[Roland Mainz <roland mainz nrubsig org>]

Daniel Veillard wrote:
> On Tue, Jul 08, 2008 at 02:04:32AM +0200, Roland Mainz wrote:
> > Are there any plans to make a new libxml version which is reentrant and
> 
>   Define reentrant.

The current problem we have is that if we have library "a" which uses
libxml2 and then calls a function in library "b" which itself does some
other stuff with libxml2 we get data corruption (the problem isn't
limited to one library - we're seeing this in multiple libxml2 consumers
in Solaris where libraries cannot be combined if both use libxml2 at the
same time).

> > removes the use of global variables, e.g. replaces |xmlInitGlobals()|
> 
>   no, though the use of global variable has been limited to strict minimum with
> new APIs
> 
> > with a function which returns a "handle" (similar to |_xmlGlobalState|)
> 
>   no
> 
> > which is per thread and/or consumer (similar to how PAM handles thread
> 
>   global variables are already per thread

Ok... but it seems this limits consumers in a way that they can't be
nested or resources "moved" between threads (e.g. thread "a" creates a
resource and then passes it completely over to thread "b" for further
processing and disposal).

> > support) and then passed explicitly to each consuming function ?
> 
>   no
> 
> In a nutshell, do not expect a libxml2 redesign.

Do you know any other XML parsers which fall into the category of being
reentrant (as described above) ?

----

Bye,
Roland

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