/*
 * Copyright (C) by Argonne National Laboratory
 *     See COPYRIGHT in top-level directory
 */

#include "mpi.h"

#include "mpitestconf.h"
#ifdef HAVE_IOSTREAM
// Not all C++ compilers have iostream instead of iostream.h
#include <iostream>
#ifdef HAVE_NAMESPACE_STD
// Those that do often need the std namespace; otherwise, a bare "cout"
// is likely to fail to compile
using namespace std;
#endif
#else
#include <iostream.h>
#endif
#include <stdio.h>
#include "mpitestcxx.h"

static char MTestDescrip[] = "Test freeing keyvals while still attached to \
a win, then make sure that the keyval delete code are still \
executed";

/* Copy increments the attribute value */
/* Note that we can really ignore this because there is no win dup */
int copy_fn(const MPI::Win & oldwin, int keyval, void *extra_state,
            void *attribute_val_in, void *attribute_val_out, bool & flag)
{
    /* Copy the address of the attribute */
    *(void **) attribute_val_out = attribute_val_in;
    /* Change the value */
    *(int *) attribute_val_in = *(int *) attribute_val_in + 1;
    flag = 1;
    return MPI::SUCCESS;
}

/* Delete decrements the attribute value */
int delete_fn(MPI::Win & win, int keyval, void *attribute_val, void *extra_state)
{
    *(int *) attribute_val = *(int *) attribute_val - 1;
    return MPI::SUCCESS;
}

int main(int argc, char *argv[])
{
    int errs = 0;
    int attrval;
    int i, key[32], keyval, saveKeyval;
    MPI::Win win;
    MTest_Init();

    while (MTestGetWin(win, 0)) {
        if (win == MPI::WIN_NULL)
            continue;

        keyval = MPI::Win::Create_keyval(copy_fn, delete_fn, (void *) 0);
        saveKeyval = keyval;    /* in case we need to free explicitly */
        attrval = 1;
        win.Set_attr(keyval, &attrval);
        /* See MPI-1, 5.7.1.  Freeing the keyval does not remove it if it
         * is in use in an attribute */
        MPI::Win::Free_keyval(keyval);

        /* We create some dummy keyvals here in case the same keyval
         * is reused */
        for (i = 0; i < 32; i++) {
            key[i] =
                MPI::Win::Create_keyval(MPI::Win::NULL_COPY_FN, MPI::Win::NULL_DELETE_FN,
                                        (void *) 0);
        }

        MTestFreeWin(win);
        /* Check that the original attribute was freed */
        if (attrval != 0) {
            errs++;
            cout << "Attribute not decremented when win " << MTestGetWinName() << " freed\n";
        }
        /* Free those other keyvals */
        for (i = 0; i < 32; i++) {
            MPI::Win::Free_keyval(key[i]);
        }
    }
    MTest_Finalize(errs);

    return 0;
}
