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// SPDX-License-Identifier: BSD-3-Clause
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/* Copyright (C) 2019 - 2020 Intel Corporation. */
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#include <memkind.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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static char path[PATH_MAX]="/tmp/";
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static void print_err_message(int err)
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{
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char error_message[MEMKIND_ERROR_MESSAGE_SIZE];
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memkind_error_message(err, error_message, MEMKIND_ERROR_MESSAGE_SIZE);
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fprintf(stderr, "%s\n", error_message);
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}
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int main(int argc, char *argv[])
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{
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const size_t size = 512;
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struct memkind *pmem_kind = NULL;
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int err = 0;
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if (argc > 2) {
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fprintf(stderr, "Usage: %s [pmem_kind_dir_path]\n", argv[0]);
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return 1;
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} else if (argc == 2) {
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if (realpath(argv[1], path) == NULL) {
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fprintf(stderr, "Incorrect pmem_kind_dir_path %s\n", argv[1]);
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return 1;
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}
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}
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char *ptr_dax_kmem = NULL;
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char *ptr_pmem = NULL;
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fprintf(stdout,
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"This example shows how to allocate to PMEM memory using file-backed memory (pmem kind) "
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"and persistent memory NUMA node (MEMKIND_DAX_KMEM).\nPMEM kind directory: %s\n",
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path);
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err = memkind_create_pmem(path, 0, &pmem_kind);
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if (err) {
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print_err_message(err);
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return 1;
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}
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ptr_dax_kmem = (char *)memkind_malloc(MEMKIND_DAX_KMEM, size);
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if (!ptr_dax_kmem) {
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fprintf(stderr, "Unable allocate 512 bytes in persistent memory NUMA node.\n");
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return 1;
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}
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ptr_pmem = (char *)memkind_malloc(pmem_kind, size);
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if (!ptr_pmem) {
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fprintf(stderr, "Unable allocate 512 bytes in file-backed memory.\n");
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return 1;
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}
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snprintf(ptr_dax_kmem, size,
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"Hello world from persistent memory NUMA node - ptr_dax_kmem.\n");
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snprintf(ptr_pmem, size, "Hello world from file-backed memory - ptr_pmem.\n");
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fprintf(stdout, "%s", ptr_dax_kmem);
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fprintf(stdout, "%s", ptr_pmem);
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memkind_free(MEMKIND_DAX_KMEM, ptr_dax_kmem);
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memkind_free(pmem_kind, ptr_pmem);
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err = memkind_destroy_kind(pmem_kind);
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if (err) {
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print_err_message(err);
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return 1;
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}
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fprintf(stdout, "Memory was successfully allocated and released.\n");
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return 0;
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}
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