/*

 * Copyright (c) 2019 Intel Corporation

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 *     * Redistributions of source code must retain the above copyright

 *       notice, this list of conditions and the following disclaimer.

 *

 *     * Redistributions in binary form must reproduce the above copyright

 *       notice, this list of conditions and the following disclaimer in

 *       the documentation and/or other materials provided with the

 *       distribution.

 *

 *     * Neither the name of Intel Corporation nor the names of its

 *       contributors may be used to endorse or promote products derived

 *       from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY LOG OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include <memkind.h>

#include <limits.h>

#include <stdio.h>

#include <stdlib.h>

static char path[PATH_MAX]="/tmp/";

static void print_err_message(int err)

{

    char error_message[MEMKIND_ERROR_MESSAGE_SIZE];

    memkind_error_message(err, error_message, MEMKIND_ERROR_MESSAGE_SIZE);

    fprintf(stderr, "%s\n", error_message);

}

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

{

    const size_t size = 512;

    struct memkind *pmem_kind = NULL;

    int err = 0;

    if (argc > 2) {

        fprintf(stderr, "Usage: %s [pmem_kind_dir_path]\n", argv[0]);

        return 1;

    } else if (argc == 2) {

        if (realpath(argv[1], path) == NULL) {

            fprintf(stderr, "Incorrect pmem_kind_dir_path %s\n", argv[1]);

            return 1;

        }

    }

    char *ptr_dax_kmem = NULL;

    char *ptr_pmem = NULL;

    fprintf(stdout,

            "This example shows how to allocate to PMEM memory using file-backed memory (pmem kind) "

            "and persistent memory NUMA node (MEMKIND_DAX_KMEM).\nPMEM kind directory: %s\n",

            path);

    err = memkind_create_pmem(path, 0, &pmem_kind);

    if (err) {

        print_err_message(err);

        return 1;

    }

    ptr_dax_kmem = (char *)memkind_malloc(MEMKIND_DAX_KMEM, size);

    if (!ptr_dax_kmem) {

        fprintf(stderr, "Unable allocate 512 bytes in persistent memory NUMA node.\n");

        return 1;

    }

    ptr_pmem = (char *)memkind_malloc(pmem_kind, size);

    if (!ptr_pmem) {

        fprintf(stderr, "Unable allocate 512 bytes in file-backed memory.\n");

        return 1;

    }

    snprintf(ptr_dax_kmem, size,

             "Hello world from persistent memory NUMA node - ptr_dax_kmem.\n");

    snprintf(ptr_pmem, size, "Hello world from file-backed memory - ptr_pmem.\n");

    fprintf(stdout, "%s", ptr_dax_kmem);

    fprintf(stdout, "%s", ptr_pmem);

    memkind_free(MEMKIND_DAX_KMEM, ptr_dax_kmem);

    memkind_free(pmem_kind, ptr_pmem);

    err = memkind_destroy_kind(pmem_kind);

    if (err) {

        print_err_message(err);

        return 1;

    }

    fprintf(stdout, "Memory was successfully allocated and released.\n");

    return 0;

}