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

/*

 *

 *  (C) 2003 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include "mpi.h"

#include <stdio.h>

#include <stdlib.h>

/*

 * This test checks if a non-blocking collective failing impacts the result

 * of another operation going on at the same time.

 */

int main(int argc, char **argv)

{

    int rank, size;

    int err;

    int excl;

    MPI_Comm small_comm;

    MPI_Group orig_grp, small_grp;

    MPI_Request req;

    MPI_Status status;

    MPI_Init(&argc, &argv);

    MPI_Comm_rank(MPI_COMM_WORLD, &rank;;

    MPI_Comm_size(MPI_COMM_WORLD, &size);

    MPI_Comm_set_errhandler(MPI_COMM_WORLD, MPI_ERRORS_RETURN);

    MPI_Comm_group(MPI_COMM_WORLD, &orig_grp);

    MPI_Group_size(orig_grp, &excl);

    excl--;

    MPI_Group_excl(orig_grp, 1, &excl, &small_grp);

    MPI_Comm_create_group(MPI_COMM_WORLD, small_grp, 0, &small_comm);

    MPI_Group_free(&orig_grp);

    MPI_Group_free(&small_grp);

    if (size < 4) {

        fprintf(stderr, "Must run with at least 2 processes\n");

        MPI_Abort(MPI_COMM_WORLD, 1);

    }

    if (rank == excl) {

        exit(EXIT_FAILURE);

    }

    MPI_Ibarrier(MPI_COMM_WORLD, &req;;

    err = MPI_Barrier(small_comm);

    if (err != MPI_SUCCESS) {

        int ec;

        MPI_Error_class(err, &ec);

        fprintf(stderr, "Result != MPI_SUCCESS: %d\n", ec);

        MPI_Abort(MPI_COMM_WORLD, 1);

    }

    err = MPI_Wait(&req, &status);

    if (err == MPI_SUCCESS) {

        int ec, ec2;

        MPI_Error_class(err, &ec);

        MPI_Error_class(status.MPI_ERROR, &ec2;;

        fprintf(stderr, "Result != MPIX_ERR_PROC_FAILED: %d Status: %d\n", ec, ec2);

        MPI_Abort(MPI_COMM_WORLD, 1);

    }

    MPI_Comm_free(&small_comm);

    if (rank == 0) {

        printf(" No Errors\n");

        fflush(stdout);

    }

    MPI_Finalize();

    return 0;

}