#include <stdio.h>
#include "mpitest.h"
-/*
+/*
Check that the MPI implementation properly handles zero-dimensional
Cartesian communicators - the original standard implies that these
- should be consistent with higher dimensional topologies and thus
+ should be consistent with higher dimensional topologies and thus
these should work with any MPI implementation. MPI 2.1 made this
requirement explicit.
*/
-int main( int argc, char *argv[] )
+int main(int argc, char *argv[])
{
int errs = 0;
int size, rank, ndims;
MPI_Comm comm, newcomm;
- MTest_Init( &argc, &argv );
+ MTest_Init(&argc, &argv);
/* Create a new cartesian communicator in a subset of the processes */
- MPI_Comm_size( MPI_COMM_WORLD, &size );
- MPI_Comm_rank( MPI_COMM_WORLD, &rank );
+ MPI_Comm_size(MPI_COMM_WORLD, &size);
+ MPI_Comm_rank(MPI_COMM_WORLD, &rank);
if (size < 2) {
- fprintf( stderr, "This test needs at least 2 processes\n" );
- MPI_Abort( MPI_COMM_WORLD, 1 );
+ fprintf(stderr, "This test needs at least 2 processes\n");
+ MPI_Abort(MPI_COMM_WORLD, 1);
}
- MPI_Cart_create( MPI_COMM_WORLD, 0, NULL, NULL, 0, &comm );
+ MPI_Cart_create(MPI_COMM_WORLD, 0, NULL, NULL, 0, &comm);
if (comm != MPI_COMM_NULL) {
- int csize;
- MPI_Comm_size( comm, &csize );
- if (csize != 1) {
- errs++;
- fprintf( stderr,
- "Sizes is wrong in cart communicator. Is %d, should be 1\n",
- csize );
- }
-
- /* This function is not meaningful, but should not fail */
- MPI_Dims_create(1, 0, NULL);
-
- ndims = -1;
- MPI_Cartdim_get(comm, &ndims);
- if (ndims != 0) {
- errs++;
- fprintf(stderr, "MPI_Cartdim_get: ndims is %d, should be 0\n", ndims);
- }
-
- /* this function should not fail */
- MPI_Cart_get(comm, 0, NULL, NULL, NULL);
-
- MPI_Cart_rank(comm, NULL, &rank);
- if (rank != 0) {
- errs++;
- fprintf(stderr, "MPI_Cart_rank: rank is %d, should be 0\n", rank);
- }
-
- /* this function should not fail */
- MPI_Cart_coords(comm, 0, 0, NULL);
-
- MPI_Cart_sub(comm, NULL, &newcomm);
- ndims = -1;
- MPI_Cartdim_get(newcomm, &ndims);
- if (ndims != 0) {
- errs++;
- fprintf(stderr,
- "MPI_Cart_sub did not return zero-dimensional communicator\n");
- }
-
- MPI_Barrier( comm );
-
- MPI_Comm_free( &comm );
- MPI_Comm_free( &newcomm );
- }
+ int csize;
+ MPI_Comm_size(comm, &csize);
+ if (csize != 1) {
+ errs++;
+ fprintf(stderr, "Sizes is wrong in cart communicator. Is %d, should be 1\n", csize);
+ }
+
+ /* This function is not meaningful, but should not fail */
+ MPI_Dims_create(1, 0, NULL);
+
+ ndims = -1;
+ MPI_Cartdim_get(comm, &ndims);
+ if (ndims != 0) {
+ errs++;
+ fprintf(stderr, "MPI_Cartdim_get: ndims is %d, should be 0\n", ndims);
+ }
+
+ /* this function should not fail */
+ MPI_Cart_get(comm, 0, NULL, NULL, NULL);
+
+ MPI_Cart_rank(comm, NULL, &rank);
+ if (rank != 0) {
+ errs++;
+ fprintf(stderr, "MPI_Cart_rank: rank is %d, should be 0\n", rank);
+ }
+
+ /* this function should not fail */
+ MPI_Cart_coords(comm, 0, 0, NULL);
+
+ MPI_Cart_sub(comm, NULL, &newcomm);
+ ndims = -1;
+ MPI_Cartdim_get(newcomm, &ndims);
+ if (ndims != 0) {
+ errs++;
+ fprintf(stderr, "MPI_Cart_sub did not return zero-dimensional communicator\n");
+ }
+
+ MPI_Barrier(comm);
+
+ MPI_Comm_free(&comm);
+ MPI_Comm_free(&newcomm);
+ }
else if (rank == 0) {
- errs++;
- fprintf( stderr, "Communicator returned is null!" );
+ errs++;
+ fprintf(stderr, "Communicator returned is null!");
}
- MTest_Finalize( errs );
+ MTest_Finalize(errs);
MPI_Finalize();
