[MPI3 Fortran] ASYNC attribute
nmm1 at cam.ac.uk
Wed May 6 10:14:18 CDT 2009
On May 6 2009, Jeff Squyres wrote:
>On May 6, 2009, at 9:21 AM, Bill Long wrote:
>> > 2. Yes, the MPI_Request argument to MPI_Wait is inout.
>> Question: Is MPI_Request actually a Fortran derived TYPE, or is it
>> just a KIND value for an INTEGER? ...
>In MPI-1 and MPI-2, they're INTEGERs. But we're toying with the idea
>of using ISO_C_BIND for MPI-3 and therefore tying the MPI_Request in
>Fortran to be whatever it is in C (likely either the equivalent of a C
>int or a pointer).
It's a structure, and the arguments are pointers. Bill is right that there
is a compatibility problem, which needs considering.
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