2 * memory buffer pool support
4 #ifndef _LINUX_MEMPOOL_H
5 #define _LINUX_MEMPOOL_H
7 #include <linux/wait.h>
11 typedef void * (mempool_alloc_t)(gfp_t gfp_mask, void *pool_data);
12 typedef void (mempool_free_t)(void *element, void *pool_data);
14 typedef struct mempool_s {
16 int min_nr; /* nr of elements at *elements */
17 int curr_nr; /* Current nr of elements at *elements */
21 mempool_alloc_t *alloc;
23 wait_queue_head_t wait;
26 extern mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
27 mempool_free_t *free_fn, void *pool_data);
28 extern mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
29 mempool_free_t *free_fn, void *pool_data, int nid);
31 extern int mempool_resize(mempool_t *pool, int new_min_nr, gfp_t gfp_mask);
32 extern void mempool_destroy(mempool_t *pool);
33 extern void * mempool_alloc(mempool_t *pool, gfp_t gfp_mask);
34 extern void mempool_free(void *element, mempool_t *pool);
37 * A mempool_alloc_t and mempool_free_t that get the memory from
38 * a slab that is passed in through pool_data.
40 void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data);
41 void mempool_free_slab(void *element, void *pool_data);
42 static inline mempool_t *
43 mempool_create_slab_pool(int min_nr, struct kmem_cache *kc)
45 return mempool_create(min_nr, mempool_alloc_slab, mempool_free_slab,
50 * a mempool_alloc_t and a mempool_free_t to kmalloc and kfree the
51 * amount of memory specified by pool_data
53 void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data);
54 void mempool_kfree(void *element, void *pool_data);
55 static inline mempool_t *mempool_create_kmalloc_pool(int min_nr, size_t size)
57 return mempool_create(min_nr, mempool_kmalloc, mempool_kfree,
62 * A mempool_alloc_t and mempool_free_t for a simple page allocator that
63 * allocates pages of the order specified by pool_data
65 void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data);
66 void mempool_free_pages(void *element, void *pool_data);
67 static inline mempool_t *mempool_create_page_pool(int min_nr, int order)
69 return mempool_create(min_nr, mempool_alloc_pages, mempool_free_pages,
73 #endif /* _LINUX_MEMPOOL_H */