MPI needs to know about the Fortran type. That's what this routine does.
It does not create the Fortran type. Just view this as a special case of
MPI_Type_create_struct.
We could just use BIND(C) but then I have to add the pair type constructor
for C. I was planning to do that but haven't typed it.
Jeff
On Fri, Nov 10, 2017 at 11:53 AM, Bill Long <longb(a)cray.com> wrote:
> Fortran 90 had derived types, and Fortran 2003 had BIND(C) derived types -
> essentially C structs. I don’t see the logic of inventing an archaic
> “create type” routine when the user could just declared the required type
> directly.
>
> Cheers,
> Bill
>
>
> > On Nov 10, 2017, at 1:34 PM, Jeff Hammond <jeff.science(a)gmail.com>
> wrote:
> >
> > Given that Fortran 90+ has user-defined types, I don't see any reason
> why we can't allow these to be used to make MPI_M**LOC reductions more
> useful in Fortran. See the following ticket for details. Please add
> comments to the GitHub issue.
> >
> > https://github.com/mpi-forum/mpi-issues/issues/70
> >
> > Thanks,
> >
> > Jeff
> >
> > --
> > Jeff Hammond
> > jeff.science(a)gmail.com
> > http://jeffhammond.github.io/
> > _______________________________________________
> > mpiwg-fortran mailing list
> > mpiwg-fortran(a)lists.mpi-forum.org
> > https://lists.mpi-forum.org/mailman/listinfo/mpiwg-fortran
>
> Bill Long
> longb(a)cray.com
> Principal Engineer, Fortran Technical Support & voice: 651-605-9024
> Bioinformatics Software Development fax: 651-605-9143
> Cray Inc./ 2131 Lindau Lane/ Suite 1000/ Bloomington, MN 55425
>
>
> _______________________________________________
> mpiwg-fortran mailing list
> mpiwg-fortran(a)lists.mpi-forum.org
> https://lists.mpi-forum.org/mailman/listinfo/mpiwg-fortran
--
Jeff Hammond
jeff.science(a)gmail.com
http://jeffhammond.github.io/
Fortran 90 had derived types, and Fortran 2003 had BIND(C) derived types - essentially C structs. I don’t see the logic of inventing an archaic “create type” routine when the user could just declared the required type directly.
Cheers,
Bill
> On Nov 10, 2017, at 1:34 PM, Jeff Hammond <jeff.science(a)gmail.com> wrote:
>
> Given that Fortran 90+ has user-defined types, I don't see any reason why we can't allow these to be used to make MPI_M**LOC reductions more useful in Fortran. See the following ticket for details. Please add comments to the GitHub issue.
>
> https://github.com/mpi-forum/mpi-issues/issues/70
>
> Thanks,
>
> Jeff
>
> --
> Jeff Hammond
> jeff.science(a)gmail.com
> http://jeffhammond.github.io/
> _______________________________________________
> mpiwg-fortran mailing list
> mpiwg-fortran(a)lists.mpi-forum.org
> https://lists.mpi-forum.org/mailman/listinfo/mpiwg-fortran
Bill Long longb(a)cray.com
Principal Engineer, Fortran Technical Support & voice: 651-605-9024
Bioinformatics Software Development fax: 651-605-9143
Cray Inc./ 2131 Lindau Lane/ Suite 1000/ Bloomington, MN 55425
Given that Fortran 90+ has user-defined types, I don't see any reason why
we can't allow these to be used to make MPI_M**LOC reductions more useful
in Fortran. See the following ticket for details. Please add comments to
the GitHub issue.
https://github.com/mpi-forum/mpi-issues/issues/70
Thanks,
Jeff
--
Jeff Hammond
jeff.science(a)gmail.com
http://jeffhammond.github.io/
