// SPDX-License-Identifier: GPL-2.0

#include "alloc_cache.h"

void io_alloc_cache_free(struct io_alloc_cache *cache,
                         void (*free)(const void *))
{
        void *entry;

        if (!cache->entries)
                return;

        while ((entry = io_alloc_cache_get(cache)) != NULL)
                free(entry);

        kvfree(cache->entries);
        cache->entries = NULL;
}

/* returns false if the cache was initialized properly */
bool io_alloc_cache_init(struct io_alloc_cache *cache,
                         unsigned max_nr, unsigned int size,
                         unsigned int init_bytes)
{
        cache->entries = kvmalloc_array(max_nr, sizeof(void *), GFP_KERNEL);
        if (!cache->entries)
                return true;

        cache->nr_cached = 0;
        cache->max_cached = max_nr;
        cache->elem_size = size;
        cache->init_clear = init_bytes;
        return false;
}

void *io_cache_alloc_new(struct io_alloc_cache *cache, gfp_t gfp)
{
        void *obj;

        obj = kmalloc(cache->elem_size, gfp);
        if (obj && cache->init_clear)
                memset(obj, 0, cache->init_clear);
        return obj;
}