+++ /dev/null
-/*
- This file generates a few communicators for use in the test suite
-
- THIS CODE IS FROM mpich/tsuite AND SHOULD BE CHANGED THERE ONLY
- */
-
-#include "mpi.h"
-
-#include "gcomm.h"
-
-void MakeComms( comms, maxn, n, make_intercomm )
-MPI_Comm *comms;
-int *n, maxn, make_intercomm;
-{
-int cnt = 0;
-int rank, size;
-int dims[2];
-int periods[2], range[1][3];
-MPI_Group group, newgroup;
-
-MPI_Comm_rank( MPI_COMM_WORLD, &rank );
-MPI_Comm_size( MPI_COMM_WORLD, &size );
-
-comms[cnt++] = MPI_COMM_WORLD;
-if (cnt == maxn) {*n = cnt; return; }
-
-/* Construct a communicator with the ranks reversed */
-MPI_Comm_group( MPI_COMM_WORLD, &group );
-range[0][0] = size-1;
-range[0][1] = 0;
-range[0][2] = -1;
-MPI_Group_range_incl( group, 1, range, &newgroup );
-MPI_Comm_create( MPI_COMM_WORLD, newgroup, &comms[cnt] );
-cnt++;
-//MPI_Group_free( &group );
-//MPI_Group_free( &newgroup );
-if (cnt == maxn) {*n = cnt; return; }
-
-if (size > 3) {
- /* Divide into odd and even processes */
- MPI_Comm_split( MPI_COMM_WORLD, rank & 0x1, rank, comms + cnt );
- cnt ++;
-
- /* Use the cartesian constructors */
- dims[0] = 0; dims[1] = 0;
- MPI_Dims_create( size, 2, dims );
- periods[0] = 0; periods[1] = 0;
- MPI_Cart_create( MPI_COMM_WORLD, 2, dims, periods, 0, comms + cnt );
- cnt ++;
- if (cnt == maxn) {*n = cnt; return; }
-
- /* Create an intercommunicator (point-to-point operations only)
- Note that in this case, codes need to use MPI_Comm_remote_size to
- (added to MPI_Comm_size) to get the size of the full group */
- if (make_intercomm) {
- /* The remote_leader is rank 1 in MPI_COMM_WORLD if we are even
- and 0 if we are odd (the remote_leader rank is relative to the
- peer communicator)
- */
- MPI_Intercomm_create( comms[2], 0, MPI_COMM_WORLD, !(rank&0x1),
- 37, comms + cnt );
- cnt ++;
- if (cnt == maxn) {*n = cnt; return; }
- }
- }
-*n = cnt;
-}
-
-void FreeComms( comms, n )
-MPI_Comm *comms;
-int n;
-{
-int i;
-for (i=1; i<n; i++) {
- if (comms[i] != MPI_COMM_NULL)
- MPI_Comm_free( comms + i );
- }
-}
