Re: caching on MPI handles

Rajeev Thakur (thakur@mcs.anl.gov)
Sat, 19 Oct 1996 21:08:24 -0500

> Ah. So the issue is really that we would like MPI-2 to be able to
> support *layered* implementations of the I/O chapter. Otherwise,
> MPI could simply bump the reference counts for the datatypes
> directly.
>
> It looks like what we need is a routine which does exactly that,
> then:
>
> MPI_TYPE_DUP(&oldtype, &newtype)

Yes, such a routine need only increment the internal reference count
for oldtype.

-- 
Rajeev Thakur                                   
Mathematics and Computer Science Division               Tel: (630) 252-1682
Argonne National Laboratory                             Fax: (630) 252-5986
9700 S. Cass Avenue                               email: thakur@mcs.anl.gov
Argonne, IL 60439                 URL: http://www.mcs.anl.gov/people/thakur