[Mpi-22] MPI-2.1 ambiguity?

[Hubert Ritzdorf]

No, we didn't have them. The request to provide all C datatypes in
Fortran was specified in one of the last meetings. When I remember
correctly, it was specified in the last meeting in Chicago or
the meeting before (I think it was specified together with item 33
of the change log). I implemented it together with the changes
for MPI 2.1 since I assumed that it was contained also in the
change log. After your mail, I recognized that it is only implicitly
mentioned by item 33.

Hubert

Jeff Squyres wrote:
> 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
>>>>>
>>>>>
>>>>> _______________________________________________
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>>>>> 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
>>>
>>>
>>>
>>> ------------------------------------------------------------------------ 
>>>
>>>
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>
>
> --Jeff Squyres
> Cisco Systems
>
>
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