On Nov 12, 2013, at 4:25 PM, George Bosilca <bosi...@icl.utk.edu> wrote:
>> However, the key here is that MPI_STATUS_SIZE is set to be the size of a >> ***C*** MPI_Status (but expressed in units of Fortran INTEGER size -- so in >> the sizeof(int)==sizeof(INTEGER)==4 case, MPI_STATUS_SIZE is 6. But in the >> sizeof(int)==4, sizeof(INTEGER)==8 case, MPI_STATUS_SIZE is 3. >> >> That being said, we *could* change this so that MPI_STATUS_SIZE is always 6, >> and have the C<—>Fortran status routines just do the Right Thing depending >> on the size/type of ompi_fortran_integer_t. > > Indeed. We can have an Fortran MPI_Status (only in the Fortran interface) > that will be 3 ompi_fortran_integer_t, and alter the translation macros to do > the right thing (translate from C int to the chosen Fortran int). I'm not sure I understand what you're proposing: what you say sounds like what we do today: - in the sizeof(int)==sizeof(INTEGER)==4 case, everything is the same size, and nothing special needs to be done - in the sizeof(int)==4, sizeof(INTEGER)==8 case, the Fortran status size is 3, but the C<->Fortran stuff still basically does a memcpy from the C MPI_Status to the Fortran array (meaning: the C int's are not upsized to be fortran INTEGERs). -- Jeff Squyres jsquy...@cisco.com For corporate legal information go to: http://www.cisco.com/web/about/doing_business/legal/cri/
