[mpich-discuss] How to access members of MPI_File struct

[Dave Goodell]

Someone pointed out to me off-list that of course, you want to print the value of atomicity, not the return value from MPI_File_get_atomicity.  I did not read the code closely earlier, just enough to compare the difference between method 1 and method 2.

-Dave

On Aug 30, 2012, at 1:30 PM CDT, Dave Goodell wrote:

> No, you can't use anything like method 2.  Just use method 1.
> 
> -Dave
> 
> On Aug 30, 2012, at 1:05 AM CDT, Ammar Ahmad Awan wrote:
> 
>> Dear All,
>> 
>> I am using a simple program to access MPI_File attributes. I know that the API provides functions such as MPI_File_get_atomicity( ) but is there a way to access them directly.
>> 
>> Example:
>> 
>> int atomicity;
>> 
>> // method 1
>> printf("atomicity : %d", MPI_File_get_atomicity(fh,&atomicity));
>> 
>> // method 2
>> printf("atomicity : %d", fh->atomicity);
>> 
>> Method 1 in the above code works fine as expected but method 2 give me the following error 
>> 
>> error: dereferencing pointer to incomplete type
>> 
>> Can anybody guide me on how to solve this problem.
>> 
>> Kind Regards
>> -- Ammar
>> ----------------------------------------------------------------------
>> Masters Student
>> Dept. Of Computer Engineering,
>> Kyung Hee University
>> ----------------------------------------------------------------------
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