cartsmall.c

来自「fortran并行计算包」· C语言 代码 · 共 46 行

/* -*- Mode: C; c-basic-offset:4 ; -*- */
/*
 *
 *  (C) 2007 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, err;
    int      dims[2];
    int      periods[2];
    int      size, rank;
    MPI_Comm comm;

    MTest_Init( &argc, &argv );

    MPI_Comm_size( MPI_COMM_WORLD, &size );
    MPI_Comm_rank( MPI_COMM_WORLD, &rank );
    
    dims[0]    = size;
    dims[1]    = size;
    periods[0] = 0;
    periods[1] = 0;

    MPI_Comm_set_errhandler( MPI_COMM_WORLD, MPI_ERRORS_RETURN );
    err = MPI_Cart_create( MPI_COMM_WORLD, 2, dims, periods, 0, &comm );
    if (err == MPI_SUCCESS) {
	errs++;
	printf( "Cart_create returned success when dims > size\n" );
    }
    else if (comm != MPI_COMM_NULL) {
	errs++;
	printf( "Expected a null comm from cart create\n" );
    }

    MTest_Finalize( errs );
    
    MPI_Finalize();
    
    return 0;
}