Re: [xml] Multithread behaviour on Solaris

["Fabrice DESRE - FT.BD/FTRD/DMI/GRI" <fabrice desre francetelecom com>]

Gary Pennington wrote:
> Daniel Veillard wrote:
>
> > On Thu, Jun 07, 2001 at 10:41:20AM +0200, Fabrice DESRE - FT.BD/FTRD/DMI/GRI wrote:
> > >   Hello,
> > >
> > >  I'm using libxml/libxslt on Solaris in a multithreaded
> > > application and found an easy to fix bug : The _REENTRANT
> > > flag has to be specified when compiling the library to
> > > avoid inconsistent behaviour of errno.
> > >   Including <errno.h> with _REENTRANT defined make errno
> > > a macro that gets the correct value when in a thread.
> > > Otherwise you always get 0 :-(
>
> That's not correct. If a threaded application calls into a thread-unsafe library, then
> you still get a per-thread errno as long as you had defined _REENTRANT and included
> <errno.h> . Make sure that your threads are not entering libxml2 in an unsafe fashion
> and you should be ok.

 Hello Gary,
 
 I'm not sure to follow you there. If I compile libxml2 as
thread-unsafe, how including
<errno.h> in my application will prevent libxml to use the bad errno ?
The choice for
errno being an int or a macro is done at compile time in errno.h so you
need to
compile a thread-safe library.
 Considering libxml thread safety on Solaris, I agree with you that the
user should have
the choice to compile one version or the other (ie thread safe/unsafe,
solaris threads/posiw threads)

 Regards,

        Fabrice

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