MPI2_SGE_SET_FLAGS
#define MPI2_SGE_SET_FLAGS_LENGTH(f,l) (MPI2_SGE_SET_FLAGS(f) | MPI2_SGE_LENGTH(l))
#define MPI2_pSGE_SET_FLAGS(psg,f) (psg)->FlagsLength |= MPI2_SGE_SET_FLAGS(f)