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();
if((num_procs&(num_procs-1)))
THROWF(arg_error,0, "alltoall pair algorithm can't be used with non power of two number of processes ! ");