[mpiwg-tools] ticket 405: MPI_CHAR as string

[Jeff Squyres (jsquyres)]

Here's the new text:

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The use of the datatype MPI_CHAR in the MPI tool information interface implies a null-terminated character array, i.e. a string in the C language. If a variable has type MPI_CHAR, the value of the count parameter returned by MPI_T_CVAR_HANDLE_ALLOC and MPI_T_PVAR_HANDLE_ALLOC will include the null-terminating character. The value returned in count must be large enough to contain any valid value for the given variable. Arrays of type MPI_CHAR are only valid to the first null character.
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There's a missing "," after "i.e." -- it should be "i.e.,"

I'd make some other minor changes:

The use of the datatype MPI_CHAR in the MPI tool information interface implies a null-terminated character array, i.e., a string in the C language. If a variable has type MPI_CHAR, the value of the count parameter returned by MPI_T_CVAR_HANDLE_ALLOC and MPI_T_PVAR_HANDLE_ALLOC ***must be large enough to include any valid value, including its null-terminating character.***  ***The contents of returned MPI_CHAR values are only defined from index 0 through the location of the first null-terminating character.***





On Feb 13, 2014, at 3:24 PM, Kathryn Mohror <kathryn at llnl.gov> wrote:

> Hi all,
> 
> Please have a look at this since we  have to decide if it's ready for a reading, and submit it to the forum for review on Monday if we do.
> 
> Kathryn
> 
> On Feb 7, 2014, at 1:05 PM, "Mohror, Kathryn" <mohror1 at llnl.gov> wrote:
> 
>> Hi all,
>> 
>> As we discussed in our call, I have drafted new text for ticket 405 which clarifies our intent for the MPI_CHAR datatype to represent strings in the tools interface. Please take a look at the red text for ticket 405 in the attached document and send your comments.
>> 
>> Kathryn
>> 
>> 
>> _________________________________________________________________
>> Kathryn Mohror, kathryn at llnl.gov, http://scalability.llnl.gov/
>> Scalability Team @ Lawrence Livermore National Laboratory, Livermore, CA, USA
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> 
>> <tools-3.pdf>_______________________________________________
>> mpiwg-tools mailing list
>> mpiwg-tools at lists.mpi-forum.org
>> http://lists.mpi-forum.org/mailman/listinfo.cgi/mpiwg-tools
> 
> _________________________________________________________________
> Kathryn Mohror, kathryn at llnl.gov, http://scalability.llnl.gov/
> Scalability Team @ Lawrence Livermore National Laboratory, Livermore, CA, USA
> 
> 
> 
> 
> 
> 
> 
> 
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-- 
Jeff Squyres
jsquyres at cisco.com
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