Re: [xml] register i/o callback functionality

[Mike Hommey <mh glandium org>]

Rob Richards wrote:
> From: Mike Hommey
>
>
> > Well, let's take a simple case :
> > One module wants to format output with indentation.
> > Another wants to format output without.
> > So, the first sets xmlIndentTreeOutput to 1, and then calls
> > xmlDumpFormatMemory.
> > The second sets xmlIndentTreeOutput to 0, and then calls
> > xmlDumpFormatMemory.
> > When the two of them are not called "simulteanously", this is not a
> > problem. But now imagine this multithreaded scenario :
> > second module sets xmlIndentTreeOutput to 0
> > first module sets xmlIndentTreeOuput to 1
> > first module outputs
> > second module outputs
> > Well, it seems to me that the second module has made an indented output
> > while not expected to...
>
>
> You should look at globals.h/c (particularly the xmlInitializeGlobalState
> function for a list of handled vars/functions). This will show you how your
> scenario would be handled (each thread would be able to handle its own state
> without interfering with other threads).

Mmmmm interesting. Thanks for the tip.

Mike