[vtk-developers] Guidance needed fixing problems doing 64bit compile on Mac OS X

[David Cole]

Is "void *" sufficient? In addition to the signatures of
InternalCreateTimer and InternalDestroyTimer, we need to consider
SetTimerEventPlatformId which is used from Tcl and Java via
vtkGenericRenderWindowInteractor.

The signatures of protected/non-wrapped methods are fine for "void *",
but we need to allow for possible usage from the Tcl and Java
layers...

I would prefer using a "wide enough" integer as the platformTimerId
type simply to avoid any issues in the wrapping layers...

Thanks,
David

On 10/26/06, Sean McBride <sean at rogue-research.com> wrote:
> On 2006-10-26 11:40, David Gobbi said:
>
> >It was nice to see you in Atlanta (finally a face to associate with the
> >email address!)
>
> Likewise!!  I hope you are well rested since the conference.
>
> >In vtkXRenderWindowInteractor, as well, InternalCreateTimer() casts an
> >unsigned long (which is the type of XtIntervalId) to an int.  So there
> >is bad stuff going on for all platforms.
>
> Agreed.
>
> >I've built VTK on several 64-bit systems (Linux-IA64, Linux-x86_64,
> >IRIX64, sparc64) and haven't seen any problems yet, but that's probably
> >just because I've never run into a timer Id large enough.
>
> That's encouraging.  I suspect vtk will work well on 64 bit Leopard once
> I get it compiling, and there are only a few compilation problems it seems.
>
> >My vote would be to use a vtkstd::map to store correspondences between
> >ints and the internal timer type.
>
> That is the other solution.  But considering that on all of Carbon,
> Cocoa, X, and Win there are bad casts I wonder if changing
> vtkTimerStruct's 'int Id' to 'ptrdiff_t Id' would be better.  That way
> both 'platformTimerId' and 'timerId' would be the same size and no casts
> nor maps would be needed.
>
> --
> ____________________________________________________________
> Sean McBride, B. Eng                 sean at rogue-research.com
> Rogue Research                        www.rogue-research.com
> Mac Software Developer              Montréal, Québec, Canada
>
>
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