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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include "mpitest.h"
int main(int argc, char *argv[])
{
int errs = 0;
int dims[2];
int periods[2];
int size, rank, newrank;
MTest_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &size);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
/* This defines a one dimensional cartision grid with a single point */
periods[0] = 1;
dims[0] = 1;
MPI_Cart_map(MPI_COMM_WORLD, 1, dims, periods, &newrank);
if (rank > 0) {
if (newrank != MPI_UNDEFINED) {
errs++;
printf("rank outside of input communicator not UNDEFINED\n");
}
} else {
if (rank != newrank) {
errs++;
printf("Newrank not defined and should be 0\n");
}
}
/* As of MPI 2.1, a 0-dimensional topology is valid (its also a
* point) */
MPI_Cart_map(MPI_COMM_WORLD, 0, dims, periods, &newrank);
if (rank > 0) {
if (newrank != MPI_UNDEFINED) {
errs++;
printf("rank outside of input communicator not UNDEFINED\n");
}
} else {
/* rank == 0 */
if (rank != newrank) {
errs++;
printf("Newrank not defined and should be 0\n");
}
}
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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