dolfin team mailing list archive

[Anders Logg <logg@xxxxxxxxx>]

On Tue, Feb 01, 2011 at 03:46:01PM -0800, Johan Hake wrote:
> On Tuesday February 1 2011 15:39:17 Anders Logg wrote:
> > On Tue, Feb 01, 2011 at 11:35:28PM +0000, Garth N. Wells wrote:
> > > On 01/02/11 23:19, Johan Hake wrote:
> > > > On Tuesday February 1 2011 15:14:21 Anders Logg wrote:
> > > >> On Tue, Feb 01, 2011 at 03:12:05PM -0800, Johan Hake wrote:
> > > >>> On Tuesday February 1 2011 14:53:55 Anders Logg wrote:
> > > >>>> Something seems to go wrong with the Hierarchical Python wrappers.
> > > >>>>
> > > >>>> C++ program:
> > > >>>>   UnitSquare mesh(3, 3);
> > > >>>>   mesh._debug();
> > > >>>>
> > > >>>> Output:
> > > >>>>
> > > >>>> Debugging hierarchical object.
> > > >>>>
> > > >>>>   has_parent()    = 0
> > > >>>>   _parent.get()   = 0
> > > >>>>   _parent.count() = 0
> > > >>>>   has_child()     = 0
> > > >>>>   _child.get()    = 0
> > > >>>>   _child.count()  = 0
> > > >>>>
> > > >>>> Debugging hierarchical object.
> > > >>>>
> > > >>>>   has_parent()    = 0
> > > >>>>   _parent.get()   = 0
> > > >>>>   _parent.count() = 0
> > > >>>>   has_child()     = 0
> > > >>>>   _child.get()    = 0
> > > >>>>   _child.count()  = 0
> > > >>>>
> > > >>>> Python program:
> > > >>>>   mesh = UnitSquare(3, 3)
> > > >>>>   mesh._debug()
> > > >>>>
> > > >>>> Debugging hierarchical object.
> > > >>>>
> > > >>>>   has_parent()    = 0
> > > >>>>   _parent.get()   = 0
> > > >>>>   _parent.count() = 0
> > > >>>>   has_child()     = 0
> > > >>>>   _child.get()    = 0
> > > >>>>   _child.count()  = 0
> > > >>>>
> > > >>>> Debugging hierarchical object.
> > > >>>>
> > > >>>>   has_parent()    = 1
> > > >>>>   _parent.get()   = cbd47290
> > > >>>>   _parent.count() = -878438560
> > > >>>>   has_child()     = 1
> > > >>>>   _child.get()    = cbd47290
> > > >>>>   _child.count()  = -878438560
> > > >>>>
> > > >>>> The first call to Hierarchical::_debug is made from the constructor
> > > >>>> of Hierarchical and is correct in both C++ and Python, but then the
> > > >>>> Python object seems to lose contact with the reality.
> > > >>>
> > > >>> Yes quite so...
> > > >>>
> > > >>> I changed locally to swig 2.0 and the problem went away. shared_ptr
> > > >>> support has been rewritten in 2.0. I might be able to hack the
> > > >>> interface of Hierarchical in a similar manner as I did for
> > > >>> Variables. Just implementing the interface again in the C++ layer.
> > > >>>
> > > >>> But I am not sure. The shared_ptr part of the SWIG interface starts
> > > >>> to be quite complex now with supporting SWIG version 1.3.37 to
> > > >>> 1.3.40 and 2.0
> > > >>>
> > > >>> Maybe we should force SWIG 2.0?
> > > >>
> > > >> Is that possible? It's not in Ubuntu yet, or is it?
> > >
> > > It's in 11.04
> > >
> > > Swig is super easy to install.
> >
> > If we can include SWIG installation in Dorsal and Johannes is able to
> > make packages that rely on SWIG 2.0 then we might as well move to 2.0
> > to save us (mainly Johan) a lot of trouble.
>
> I can see if I can hack the interface of Hierarchical for DOLFIN 0.9.10. If
> that work we can make the move to SWIG 2.0 for the 1.0 release? It will clean
> up some IF statements in the SWIG interface code :)

Seems to work fine now! Thanks!

--
Anders