Re: [xml] Thread safety question

["Brent R. Matzelle" <bmatzelle yahoo com>]

--- Daniel Veillard <veillard redhat com> wrote:
> On Sat, Jan 05, 2002 at 07:36:03AM -0800, Brent R. Matzelle wrote:
> > Is it possible to have multiple threads reading (not altering) a
> > single xmlDocPtr at the same time or will I require a mutex?  I
> read
>
>   It requires a mutex.
>
> > the Thread safety document on xmlsoft but I would like to make
> sure.
>
>   Only parsing is thread safe (and assuming the library got
> compiled
> with the adequate options). Putting locking at the tree access
> level
> would put a terrible burden on apps not requiring it. It's both
> simpler
> and more efficient in most case to let the application do the
> locking
> to protect concurrent tree accesses.

That makes good sense.  Thanks very much.  I will control the locking
on the application side.  

One other question.  My program contains a DOM that creates new nodes
pretty often which, given time, would make the DOM quite large.  I
looked over the documentation for a xmlRemoveNode function but could
only find an xmlRemoveProp.  Is there any efficient method to delete
nodes from the DOM tree and free the allocated memory without
re-creating the DOM without the unwanted node?

Regards,

Brent

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