Re: tasking with GNAT 3.14p on windows

[Ole-Hjalmar Kristensen <oleh@vlinux.voxelvision.no>]

Rodrigo Garc�a <rodrigo.garcia.ARROBA.epfl.ch> writes:

> Bernd Specht wrote:
> > Hi,
> > I tried an example from "Barnes, 18.8", but it didn't work as
> > expected. Any ideas?
> > with Text_IO; use Text_IO;
> > procedure TaskTest is
> > begin
> >   select
> >     delay 3.0;
> >     put_line ("aborted");
> >   then abort
> >     loop       null; -- modified
> >     end loop;
> >   end select;
> > end TaskTest;
> >  The computation is not aborted (what I would expect). Do I
> > misunderstand something?
> 
> 
>    This example works as expected on my Red Hat 7.3 with GNAT 3.15p. I
> will try to run it on Windows 2000 to see if that is the problem.
> 
>    That would be strange anyway, since GNAT relies on pthreads for
> implementing its run-time. Is there a problem with pthreads
> implementation on Windows?
> 
> Rodrigo
> 
Unless Microsoft has significantly improved the Pthreads support, it's
not a good idea to implement the GNAT runtime on top of Pthreads on
Windows.  From a quick look at the GNAT runtime, it seems like the
native NT interface is used, not Pthreads.

-- 
Ole-Hj. Kristensen

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