[petsc-users] pctype comparison

[Matthew Knepley]

On Tue, May 7, 2013 at 4:49 AM, Frederik Treue <frtr at fysik.dtu.dk> wrote:

> Hi,
>
> is there any way of checking which type of PC you are using in the code?
> Ie. I want to do something like:
>

http://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscObjectTypeCompare.html

   Matt


> ...
> PCType mytype;
> PC pc;
> if (PhaseOfTheMoon==waxing) {
>         mytype=PCJacobi;
> } else {
>         mytype=PCMG;
> }
> ...
> ierr=PCSetType(pc,mytype);CHKERRQ(ierr);
> if (mytype==PCMG) {
>   ierr=PCMGSetLevels(pc,levels,PETSC_NULL);CHKERRQ(ierr);
>   ...
> }
> ...
>
> But since mytype is apparently a pointer type, this doesn't work.
>
> /Frederik Treue
>
>
>


-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which their
experiments lead.
-- Norbert Wiener
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