Inconsistent and incorrect use of MPIR_Nest_incr and MPIR_Nest_decr

[thakur@…]

> I enabled the nesting tests in MPICH2 and found a number of problems  
> in the ROMIO code (particularly in iwrite.c and iread.c).  In looking  
> at these files, I saw no need for the MPIR_Nest_incr or Nest_decr .   
> These macros should only be used when calling an MPI routine (not an  
> MPIR or other internal implementation routine).  Their purpose is to  
> tell the MPI routine not to invoke the MPI error handler but instead  
> to return an error code; they're also currently used to avoid  
> recursive calls to the global thread mutex; again, this only applies  
> to the MPI routines, not the internal routines.

[Rajeev Thakur]

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[robl]

Is this still a problem? I think I have nesting tests enabled (--enable-g=all) and the romio tests pass w/o complaint (well, they complain about leaking generalized request handles, but that's something else).

Don't remember fixing this, so thank you to whomever did so!

==rob

[thakur]

RobL thinks this is fixed.