MPI2_FUNCTION_DIAG_BUFFER_POST
if (diag->function == MPI2_FUNCTION_DIAG_BUFFER_POST) {
diag.function = MPI2_FUNCTION_DIAG_BUFFER_POST;
(function != MPI2_FUNCTION_DIAG_BUFFER_POST)) {
case MPI2_FUNCTION_DIAG_BUFFER_POST: