1) It would be nice if something in the request handle indicated that
MPI_Cancel had been called, so that I can decide whether I need to call
MPI_Test_Cancelled before accessing the status.
2) Another issue is that if these accessor functions are being added to
decrease overhead, they had better be inexpensive to call. Making fields in
the status structure visible is very convenient. Can something similar be
done with the request?
Pat Worley