[mpiwg-languages] static datatypes lifetimes

[Alfredo Correa]

Hi Sayan,

On Fri, Apr 25, 2025 at 2:03 PM Ghosh, Sayan <sayan.ghosh at pnnl.gov> wrote:

>
>    - Consider finalize-delete-callback (this is what Alfredo is alluding
>    to perhaps w.r.t datatype-attached-to-environment) – that seems to rely on
>    MPI_COMM_SELF callback (freeing comm-self triggers callback)
>
>
>
That is a good point. At first glance, attaching things to MPI_COMM_WORLD
or MPI_COMM_SELF would have a similar effect to attaching stuff to the
environment.
I didn't think about this because I was reluctant to modify (in any way)
either of these special communicators, in particular MPI_COMM_WORLD.
But MPI_COMM_SELF might still be a good candidate; others can point out if
there is a catch.

Thanks,
Alfredo
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