[Mpi-22] Another MPI-2.2 attribute ambiguity?

[Iain Bason]

On May 19, 2009, at 1:16 PM, William Gropp wrote:

> MPICH2 passes the value of the extra_state that was saved in the  
> internal storage to the callback routine, which is case 2 (the copy  
> is implicit as the value is passed to the routine and C semantics  
> ensures that the value isn't changed).

But this is the Fortran interface, not the C interface.

Iain