/*

 * Copyright (C) 2017 - 2019 Intel Corporation.

 * All rights reserved.

 *

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

 * modification, are permitted provided that the following conditions are met:

 * 1. Redistributions of source code must retain the above copyright notice(s),

 *    this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright notice(s),

 *    this list of conditions and the following disclaimer in the documentation

 *    and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``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 HOLDER(S) 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 OUT OF THE USE OF THIS SOFTWARE, EVEN IF

 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include <memkind.h>

#include <memkind/internal/memkind_arena.h>

#include <memkind/internal/memkind_default.h>

#include <memkind/internal/heap_manager.h>

#include <numa.h>

static struct bitmask *regular_nodes_mask = NULL;

static void regular_nodes_init(void)

{

    unsigned i;

    unsigned nodes_num = (unsigned)numa_num_configured_nodes();

    struct bitmask *node_cpus = numa_allocate_cpumask();

    regular_nodes_mask = numa_allocate_nodemask();

    for (i = 0; i < nodes_num; i++) {

        numa_node_to_cpus(i, node_cpus);

        if (numa_bitmask_weight(node_cpus))

            numa_bitmask_setbit(regular_nodes_mask, i);

    }

    numa_bitmask_free(node_cpus);

}

static void memkind_regular_init_once(void)

{

    regular_nodes_init();

    memkind_init(MEMKIND_REGULAR, true);

}

static int memkind_regular_check_available(struct memkind *kind)

{

    /* init_once method is called in memkind_malloc function

     * when memkind malloc is not called this function will fail.

     * Call pthread_once to be sure that situation mentioned

     * above will never happen */

    pthread_once(&kind->init_once, kind->ops->init_once);

    return regular_nodes_mask != NULL ? MEMKIND_SUCCESS : MEMKIND_ERROR_UNAVAILABLE;

}

MEMKIND_EXPORT int memkind_regular_all_get_mbind_nodemask(struct memkind *kind,

                                                          unsigned long *nodemask,

                                                          unsigned long maxnode)

{

    struct bitmask nodemask_bm = {maxnode, nodemask};

    if(!regular_nodes_mask) {

        return MEMKIND_ERROR_UNAVAILABLE;

    }

    copy_bitmask_to_bitmask(regular_nodes_mask, &nodemask_bm);

    return MEMKIND_SUCCESS;

}

static int memkind_regular_finalize(memkind_t kind)

{

    if(regular_nodes_mask)

        numa_bitmask_free(regular_nodes_mask);

    return memkind_arena_finalize(kind);

}

MEMKIND_EXPORT struct memkind_ops MEMKIND_REGULAR_OPS = {

    .create = memkind_arena_create,

    .destroy = memkind_default_destroy,

    .malloc = memkind_arena_malloc,

    .calloc = memkind_arena_calloc,

    .posix_memalign = memkind_arena_posix_memalign,

    .realloc = memkind_arena_realloc,

    .free = memkind_arena_free,

    .check_available = memkind_regular_check_available,

    .mbind = memkind_default_mbind,

    .get_mmap_flags = memkind_default_get_mmap_flags,

    .get_mbind_mode = memkind_default_get_mbind_mode,

    .get_mbind_nodemask = memkind_regular_all_get_mbind_nodemask,

    .get_arena = memkind_thread_get_arena,

    .init_once = memkind_regular_init_once,

    .malloc_usable_size = memkind_default_malloc_usable_size,

    .finalize = memkind_regular_finalize,

    .get_stat = memkind_arena_get_kind_stat,

    .defrag_reallocate = memkind_arena_defrag_reallocate

};