Re: [xslt] threaded use with xsltCleanupGlobals()

[Daniel Veillard <veillard redhat com>]

On Tue, Oct 07, 2008 at 04:57:09PM +0100, Sam Liddicott wrote:
> I think that a multi-threaded user of libxslt should generally only call
> xsltCleanupGlobals() when the application is about to shut down;

  yes

> What nasty thing might happen if a thread calls xsltCleanupGlobals() and
> maybe while another thread is doing xslt processing?
> 
> (And the same for xmlCleanupParser I guess).

  even worse, wor example predefined entities would suddenly disapear,
near garanteed crash for the other threads,

> I guess it is ok to call xsltFreeStylesheet and xmlFreeDoc from a thread
> as a thread-private reference is passed.

  You can actually share stylesheets between threads (once compiled),
but you need to handle the synchronization for freeing. Don't assume
a doc is necessarily thread-private even if in most case that should be
true (well it depends on your model if you don't share compiled
stylesheets everything should be kept private).

Daniel

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