1#include <stdlib.h>
 2#include <string.h>
 3#include <malloc.h>
 4#include <unistd.h>
 5#include <assert.h>
 6
 7#include <linux/mempool.h>
 8#include <linux/slab.h>
 9#include <urcu/uatomic.h>
10
11int nr_allocated;
12
13void *mempool_alloc(mempool_t *pool, int gfp_mask)
14{
15	return pool->alloc(gfp_mask, pool->data);
16}
17
18void mempool_free(void *element, mempool_t *pool)
19{
20	pool->free(element, pool->data);
21}
22
23mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
24			mempool_free_t *free_fn, void *pool_data)
25{
26	mempool_t *ret = malloc(sizeof(*ret));
27
28	ret->alloc = alloc_fn;
29	ret->free = free_fn;
30	ret->data = pool_data;
31	return ret;
32}
33
34void *kmem_cache_alloc(struct kmem_cache *cachep, int flags)
35{
36	void *ret = malloc(cachep->size);
37	if (cachep->ctor)
38		cachep->ctor(ret);
39	uatomic_inc(&nr_allocated);
40	return ret;
41}
42
43void kmem_cache_free(struct kmem_cache *cachep, void *objp)
44{
45	assert(objp);
46	uatomic_dec(&nr_allocated);
47	memset(objp, 0, cachep->size);
48	free(objp);
49}
50
51struct kmem_cache *
52kmem_cache_create(const char *name, size_t size, size_t offset,
53	unsigned long flags, void (*ctor)(void *))
54{
55	struct kmem_cache *ret = malloc(sizeof(*ret));
56
57	ret->size = size;
58	ret->ctor = ctor;
59	return ret;
60}