[vtkusers] problem with POSIX threads

[Berk Geveci]

OR you could upgrade to VTK 4.0 and set the appropriate
options when configuring the build. CMake (which VTK 4.0
uses as the build configuration utility) allows things like
this to be changed much more easily. In the current configuration,
you can turn on/off pthread and sproc support independently.

-Berk


>From: Praveen Bhaniramka <praveenb at gauri.engr.sgi.com>
>To: Song Li <lisong at vrac.iastate.edu>
>CC: Berk Geveci <berkgeveci at hotmail.com>, vtkusers at public.kitware.com
>Subject: Re: [vtkusers] problem with POSIX threads
>Date: Tue, 5 Feb 2002 12:42:26 -0800
>
>Song,
>
>I have not played with the VTK code much myself but, it seems that when
>you run configure, it creates a file vtkConfigure.h in common/ where the
>#define VTK_USE_SPROC is set to one. You could probably modify the file to
>use #define VTK_USE_PTHREADS and recompile the source.
>
>Also, after some more digging, I noticed that the script configure in
>vtk's toplevel directory has a rule which sets VTK_USE_SPROC to be true on
>IRIX. You could probably modify that, run configure again and then compile
>the source.
>
>Cheers,
>Praveen
>
>On Tue, 5 Feb 2002, Song Li wrote:
>
> > Thanks for information!
> > the problem is I only can find vtkMultiThreader.cxx under "common", 
>there are many "#ifdef
> > ....." there, so what you suggest is use #defines ..... in my code or 
>directly in VTK's source
> > code ?? Thanks a lot!
> >
> >
> >
> > Praveen Bhaniramka wrote:
> >
> > > Hi Berk and Song,
> > >
> > > The reason for these problems is probably that VTK uses sproc for the
> > > multi-threading (see common/vtkMultiThreading.cxx) on SGIs. As far as 
>I
> > > know, on IRIX, pthreads are implemented using sproc in such a way that
> > > they do not work with sprocs properly. So if your application uses
> > > pthreads, you should disable the use of sproc and use pthreads 
>instead.
> > >
> > > I haven't looked at the vtkMultiThreading source much, but it seems 
>that
> > > there are #defines for VTK_USE_SPROC and VTK_USE_PTHREADS which you 
>could
> > > use to make the appropriate changes.
> > >
> > > HTH,
> > > Praveen
> > >
> > > On Mon, 4 Feb 2002, Berk Geveci wrote:
> > >
> > > > Even with Irix 6.5, there have been issues with pthreads.
> > > > Random crashes and such. Whenever we compile on SGIs, we
> > > > disable pthread support.
> > > >
> > > > -Berk
> > > >
> > > > >From: Song Li <lisong at vrac.iastate.edu>
> > > > >Reply-To: lisong at vrac.iastate.edu
> > > > >To: vtkusers at public.kitware.com
> > > > >Subject: [vtkusers] problem with POSIX threads
> > > > >Date: Mon, 04 Feb 2002 15:14:34 -0600
> > > > >
> > > > >Hi, gurus,
> > > > >    my program use VTK and other software libraries on SGI 
>platform, it
> > > > >works fine when I use libraries with sproc mode, but after I switch 
>to
> > > > >use POSIX-mode library, the program can not work, I doubt that VTK 
>cause
> > > > >the problem, anybody can tell me if VTK can also support these two 
>modes
> > > > >and how to switch between them ??(Makefile available??)
> > > > >   Thanks a lot!
> > > > >
> > > > >--
> > > > >Song Li
> > > > >VRAC(Virtual Reality Application Center),Iowa State University
> > > > >Email: lisong at vrac.iastate.edu
> > > > >Homepage: http://www.vrac.iastate.edu/~lisong
> > > > >
> > > > >
> > > >
> > > >
> > > >
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> > >
> > > -------------------------------------------------------------------
> > > Praveen Bhaniramka               Member of Technical Staff (MTS)
> > > praveenb at sgi.com                 Advanced Graphics Division
> > > (650)933-1785                    Silicon Graphics, Inc.
> > > -------------------------------------------------------------------
> >
> > --
> > Song Li
> > VRAC(Virtual Reality Application Center),Iowa State University
> > Email: lisong at vrac.iastate.edu
> > Homepage: http://www.vrac.iastate.edu/~lisong
> >
> >
> >
>
>-------------------------------------------------------------------
>Praveen Bhaniramka               Member of Technical Staff (MTS)
>praveenb at sgi.com                 Advanced Graphics Division
>(650)933-1785                    Silicon Graphics, Inc.
>-------------------------------------------------------------------
>
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