Blame examples/pmem_detect_kind.c

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/*
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 * Copyright (c) 2019 Intel Corporation
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 *
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 *     * Redistributions of source code must retain the above copyright
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 *       notice, this list of conditions and the following disclaimer.
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 *
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 *     * Redistributions in binary form must reproduce the above copyright
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 *       notice, this list of conditions and the following disclaimer in
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 *       the documentation and/or other materials provided with the
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 *       distribution.
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 *
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 *     * Neither the name of Intel Corporation nor the names of its
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 *       contributors may be used to endorse or promote products derived
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 *       from this software without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY LOG OF THE USE
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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 */
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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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#define MALLOC_SIZE 512U
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#define REALLOC_SIZE 2048U
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#define ALLOC_LIMIT  1000U
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static void *alloc_buffer[ALLOC_LIMIT];
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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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static int allocate_pmem_and_default_kind(struct memkind *pmem_kind)
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{
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    unsigned i;
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    for(i = 0; i < ALLOC_LIMIT; i++) {
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        if (i%2)
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            alloc_buffer[i] = memkind_malloc(pmem_kind, MALLOC_SIZE);
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        else
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            alloc_buffer[i] = memkind_malloc(MEMKIND_DEFAULT, MALLOC_SIZE);
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        if (!alloc_buffer[i]) {
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            return 1;
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        }
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    }
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    return 0;
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}
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static int realloc_using_get_kind_only_on_pmem()
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{
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    unsigned i;
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    for(i = 0; i < ALLOC_LIMIT; i++) {
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        if (memkind_detect_kind(alloc_buffer[i]) != MEMKIND_DEFAULT) {
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            void *temp = memkind_realloc(NULL, alloc_buffer[i], REALLOC_SIZE);
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            if (!temp) {
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                return 1;
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            }
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            alloc_buffer[i] = temp;
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        }
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    }
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    return 0;
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}
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static int verify_allocation_size(struct memkind *pmem_kind, size_t pmem_size)
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{
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    unsigned i;
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    for(i = 0; i < ALLOC_LIMIT; i++) {
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        void *val = alloc_buffer[i];
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        if (i%2) {
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            if (memkind_malloc_usable_size(pmem_kind, val) != pmem_size ) {
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                return 1;
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            }
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        } else {
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            if (memkind_malloc_usable_size(MEMKIND_DEFAULT, val) != MALLOC_SIZE) {
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                return 1;
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            }
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        }
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    }
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    return 0;
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}
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int main(int argc, char *argv[])
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{
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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 && (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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    fprintf(stdout,
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            "This example shows how to distinguish allocation from different kinds using detect kind function"
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            "\nPMEM kind directory: %s\n", 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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    fprintf(stdout, "Allocate to PMEM and DEFAULT kind.\n");
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    if (allocate_pmem_and_default_kind(pmem_kind)) {
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        fprintf(stderr, "allocate_pmem_and_default_kind().\n");
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        return 1;
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    }
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    if (verify_allocation_size(pmem_kind, MALLOC_SIZE)) {
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        fprintf(stderr, "verify_allocation_size() before resize.\n");
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        return 1;
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    }
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    fprintf(stdout,
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            "Reallocate memory only on PMEM kind using memkind_detect_kind().\n");
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    if (realloc_using_get_kind_only_on_pmem()) {
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        fprintf(stderr, "realloc_using_get_kind_only_on_pmem().\n");
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        return 1;
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    }
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    if (verify_allocation_size(pmem_kind, REALLOC_SIZE)) {
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        fprintf(stderr, "verify_allocation_size() after resize.\n");
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        return 1;
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    }
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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 from PMEM kind was successfully reallocated.\n");
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    return 0;
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}