/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */

/*

 *

 *  (C) 2012 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include <stdio.h>

#include <assert.h>

#include "mpi.h"

#include "mpitest.h"

int main(int argc, char *argv[])

{

    MPI_Request request;

    int size, rank;

    int one = 1, two = 2, isum, sum;

    MPI_Init(&argc, &argv);

    MPI_Comm_size(MPI_COMM_WORLD, &size);

    MPI_Comm_rank(MPI_COMM_WORLD, &rank;;

    assert(size == 2);

    MPI_Iallreduce(&one, &isum, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD, &request);

    MPI_Allreduce(&two, &sum, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD);

    MPI_Wait(&request, MPI_STATUS_IGNORE);

    assert(isum == 2);

    assert(sum == 4);

    if (rank == 0)

        printf(" No errors\n");

    MPI_Finalize();

    return 0;

}