[Mpi-22] MPI-2.1 ambiguity?

[Jeff Squyres]

What does NEC MPI do -- do you have MPI_INT and MPI_FLOAT (etc.) in  
mpif.h?

On Jul 16, 2008, at 12:57 PM, Hubert Ritzdorf wrote:

> What's about the C++ datatypes for complex ?
> MPI_COMPLEX and MPI_Double_Complex are already defined for Fortran
> datatypes. The complex Fortran datatypes  within C++  have a special
> name in order to avoid a name collision.
>
> Hubert
>
> William Gropp wrote:
>> One piece of relevant text in MPI 2.0 is in section 4.12.6 (in  
>> MPI-2.0) says that "All predefined datatypes can be used in  
>> datatype constructors in any language."  However, the example uses  
>> MPI_Type_f2c ton convert the Fortran handle to the C version before  
>> passing it into the MPI_Type_create_struct routine, so this text  
>> could be interpreted as allowing the use of those datatypes through  
>> the handle conversion mechanism without requiring them to be  
>> defined in each languages header file.  Presumably the requirement  
>> is that they be predefined with the value that you'd get from the  
>> handle conversion function?
>>
>> Bill
>>
>> On Jul 16, 2008, at 8:18 AM, Hubert Ritzdorf wrote:
>>
>>> Hi,
>>>
>>> when I remember correctly, it was decided to provide the C MPI  
>>> datatypes
>>> in Fortran since
>>> the Fortran datatypes are supported in C and C++.
>>>
>>> Hubert
>>>
>>> Jeff Squyres wrote:
>>>> I will file a proposal about this if there is a problem, but I  
>>>> wanted
>>>> to ask the group before I did so.  In the changelog for MPI-2.1:
>>>>
>>>> 2. Section 3.2.2 on page 27, Section 16.1.6 on page 453, and  
>>>> Annex A.1
>>>> on page 491.
>>>> MPI_LONG_LONG_INT, MPI_LONG_LONG (as synonym),  
>>>> MPI_UNSIGNED_LONG_LONG,
>>>> MPI_SIGNED_CHAR, and MPI_WCHAR are moved from optional to official  
>>>> and they
>>>> are therefore defined for all three language bindings.
>>>>
>>>> Note that it says that these C datatype names must be in all three
>>>> language bindings.
>>>>
>>>> Are C MPI datatypes supposed to be available in Fortran?  I  
>>>> looked in
>>>> mpif.h for Open MPI, MPICH2, HP MPI, and Intel MPI, and I didn't  
>>>> see C
>>>> MPI datatypes in there (e.g., MPI_INT and MPI_FLOAT).
>>>>
>>>> So:
>>>>
>>>> - is there language somewhere in MPI that says that C datatypes are
>>>> not supposed to be in mpif.h? (and therefore the MPI-2.1  
>>>> changelog is
>>>> wrong)
>>>>
>>>> or
>>>>
>>>> - are all 4 of the above MPI's wrong for not including the C  
>>>> datatypes
>>>> in mpif.h?
>>>>
>>>> --Jeff Squyres
>>>> Cisco Systems
>>>>
>>>>
>>>> _______________________________________________
>>>> mpi-22 mailing list
>>>> mpi-22_at_[hidden] <mailto:mpi-22_at_[hidden]>
>>>> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-22
>>>>
>>>> <smime.p7s><ATT00001.txt>
>>
>> William Gropp
>> Paul and Cynthia Saylor Professor of Computer Science
>> University of Illinois Urbana-Champaign
>>
>>
>>
>> ------------------------------------------------------------------------
>>
>> _______________________________________________
>> mpi-22 mailing list
>> mpi-22_at_[hidden]
>> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-22
>>
> _______________________________________________
> mpi-22 mailing list
> mpi-22_at_[hidden]
> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi-22


-- 
Jeff Squyres
Cisco Systems