[petsc-users] Retreiving a PetscObject

[Eric Chamberland]

ok, here is what I want to do:

I am writing a brand new PC which needs some other PETSc objects like a 
Vec (for unit partition).

We have a text based user file format in which the user can create 
arbitrary Petsc's Vec or Mat.

Then, I would like the user to give the prefix of these Vec or Mat as a 
parameter for the new PC that we would like to configure completely via 
the "petsc options database".

So in our PCApply_XXX we would like to retrieve some specific options 
which will simply give the Vec prefix to retreive.

Thanks,

Eric


On 2023-01-13 15:39, Matthew Knepley wrote:
> On Fri, Jan 13, 2023 at 4:24 AM Eric Chamberland 
> <Eric.Chamberland at giref.ulaval.ca> wrote:
>
>     Hi,
>
>     Is it possible with PETSc's API to query an objet by it's name?
>
>     Is there a "global" database with all PETScObject created?
>
>
> No, we do not store that information. What would the use case be? 
> Maybe there is another way to do it.
>
>   Thanks,
>
>     Matt
>
>     Thanks,
>
>     Eric
>
>     -- 
>     Eric Chamberland, ing., M. Ing
>     Professionnel de recherche
>     GIREF/Université Laval
>     (418) 656-2131 poste 41 22 42
>
>
>
> -- 
> 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
>
> https://www.cse.buffalo.edu/~knepley/ 
> <http://www.cse.buffalo.edu/~knepley/>

-- 
Eric Chamberland, ing., M. Ing
Professionnel de recherche
GIREF/Université Laval
(418) 656-2131 poste 41 22 42
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