comm_size, -1, encode_datatype(MPI_CURRENT_TYPE), ""));
void *recvbuf = smpi_get_tmp_sendbuffer(comm_size* MPI_CURRENT_TYPE->size());
comm_size, -1, encode_datatype(MPI_CURRENT_TYPE), ""));
void *recvbuf = smpi_get_tmp_sendbuffer(comm_size* MPI_CURRENT_TYPE->size());