char *send_ptr = (char *) send_buff;
char *recv_ptr = (char *) recv_buff;
- rank = smpi_comm_rank(comm);
- num_procs = smpi_comm_size(comm);
+ rank = comm->rank();
+ num_procs = comm->size();
send_chunk = smpi_datatype_get_extent(send_type);
recv_chunk = smpi_datatype_get_extent(recv_type);