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

/*

 *

 *  (C) 2013 by Argonne National Laboratory.

 *      See COPYRIGHT in top-level directory.

 */

#include <stdio.h>

#include "mpi.h"

#include "mpitest.h"

int key = MPI_KEYVAL_INVALID;

char a[100];

int delete_fn(MPI_Comm, int, void *, void *);

int main(int argc, char **argv)

{

    MPI_Comm scomm;

    int errs = 0;

    MTest_Init(&argc, &argv);

    MPI_Comm_split(MPI_COMM_WORLD, 1, 0, &scomm);

    MPI_Comm_create_keyval(MPI_NULL_COPY_FN, delete_fn, &key, &errs);

    MPI_Comm_set_attr(scomm, key, a);

    MPI_Comm_free(&scomm);

    MPI_Comm_free_keyval(&key);

    MTest_Finalize(errs);

    MPI_Finalize();

    return 0;

}

int delete_fn(MPI_Comm comm, int keyval, void *attr_val, void *extra_state)

{

    /* The standard is not explicit that the 'comm' argument of

     * delete_fn must be valid, so this test is only in effect when

     * !USE_STRICT_MPI. */

#ifndef USE_STRICT_MPI

    int err, flg, *errs = extra_state;

    void *ptr;

    if (comm == MPI_COMM_NULL) {

        printf("MPI_COMM_NULL passed to delete_fn\n");

        (*errs)++;

    }

    err = MPI_Comm_get_attr(comm, key, &ptr, &flg;;

    if (err != MPI_SUCCESS) {

        printf("MPI_Comm_get_attr returned error %d, presumably due to invalid communicator\n",

               err);

        (*errs)++;

    }

#endif

    return 0;

}