Matthew Wilcox | 1366c37 | 2016-03-17 14:21:45 -0700 | [diff] [blame^] | 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 | |
| 11 | int nr_allocated; |
| 12 | |
| 13 | void *mempool_alloc(mempool_t *pool, int gfp_mask) |
| 14 | { |
| 15 | return pool->alloc(gfp_mask, pool->data); |
| 16 | } |
| 17 | |
| 18 | void mempool_free(void *element, mempool_t *pool) |
| 19 | { |
| 20 | pool->free(element, pool->data); |
| 21 | } |
| 22 | |
| 23 | mempool_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 | |
| 34 | void *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 | |
| 43 | void 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 | |
| 51 | struct kmem_cache * |
| 52 | kmem_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 | } |