[petsc-users] MatSeqBAIJSetPreallocation

[Mark Adams]

On Thu, Jun 4, 2020 at 6:41 PM Sanjay Govindjee <s_g at berkeley.edu> wrote:

> thanks, that did it.  now I am wondering about all the other
> PETSC_NULL_INTEGER instances in
> my code.  how should I be thinking about PETSC_NULL_INTEGER


I would think it's an integer array/pointer in C.


> and
> PETSC_DEFAULT_INTEGER,
>

and an integer in C.


> so that I know that I am using the correct one?
>
> On 6/4/20 3:16 PM, Satish Balay wrote:
> > On Thu, 4 Jun 2020, Sanjay Govindjee wrote:
> >
> >> I'm moving from 3.10 to 3.13 and ran into a compilation problem with
> >> MatSeqBAIJSetPreallocation( ).
> >> The manual page shows:
> >>
> >> PetscErrorCode
> >> <
> https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscErrorCode.html#PetscErrorCode
> >
> >> MatSeqBAIJSetPreallocation
> >> <
> https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Mat/MatSeqBAIJSetPreallocation.html#MatSeqBAIJSetPreallocation
> >(Mat
> >> <
> https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Mat/Mat.html#Mat
> >
> >> B,PetscInt
> >> <
> https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscInt.html#PetscInt
> >
> >> bs,PetscInt
> >> <
> https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscInt.html#PetscInt
> >
> >> nz,const PetscInt
> >> <
> https://www.mcs.anl.gov/petsc/petsc-current/docs/manualpages/Sys/PetscInt.html#PetscInt
> >
> >> nnz[])
> >>
> >>
> >> Which I think is the way it was before but my code is now tossing a
> compile
> >> error
> >>
> >>
> >>     65 |      & PETSC_NULL_INTEGER,mr(np(246)),
> >>        |                                     1
> >> Error: Rank mismatch in argument 'c' at (1) (scalar and rank-1)
> >>
> >>
> >> The full line looks like:
> >>          call MatSeqBAIJSetPreallocation(Mmat,nsbk,
> >>      & PETSC_NULL_INTEGER,mr(np(246)),
> > I think this should be PETSC_DEFAULT_INTEGER.
> >
> > Previously there were no Interface definitions - so no error checks by
> the compiler.
> >
> > Satish
> >
> >>      & ierr)
> >>
> >> Any suggestions on what I've messed up?
> >> -sanjay
> >>
> >>
>
>
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