2 * memory buffer pool support
4 #ifndef _LINUX_MEMPOOL_H
5 #define _LINUX_MEMPOOL_H
7 #include <linux/wait.h>
9 typedef void * (mempool_alloc_t)(gfp_t gfp_mask, void *pool_data);
10 typedef void (mempool_free_t)(void *element, void *pool_data);
12 typedef struct mempool_s {
14 int min_nr; /* nr of elements at *elements */
15 int curr_nr; /* Current nr of elements at *elements */
19 mempool_alloc_t *alloc;
21 wait_queue_head_t wait;
24 extern mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
25 mempool_free_t *free_fn, void *pool_data);
26 extern mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn,
27 mempool_free_t *free_fn, void *pool_data, int nid);
29 extern int mempool_resize(mempool_t *pool, int new_min_nr, gfp_t gfp_mask);
30 extern void mempool_destroy(mempool_t *pool);
31 extern void * mempool_alloc(mempool_t *pool, gfp_t gfp_mask);
32 extern void mempool_free(void *element, mempool_t *pool);
35 * A mempool_alloc_t and mempool_free_t that get the memory from
36 * a slab that is passed in through pool_data.
38 void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data);
39 void mempool_free_slab(void *element, void *pool_data);
42 * 2 mempool_alloc_t's and a mempool_free_t to kmalloc/kzalloc and kfree
43 * the amount of memory specified by pool_data
45 void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data);
46 void *mempool_kzalloc(gfp_t gfp_mask, void *pool_data);
47 void mempool_kfree(void *element, void *pool_data);
48 static inline mempool_t *mempool_create_kmalloc_pool(int min_nr, size_t size)
50 return mempool_create(min_nr, mempool_kmalloc, mempool_kfree,
53 static inline mempool_t *mempool_create_kzalloc_pool(int min_nr, size_t size)
55 return mempool_create(min_nr, mempool_kzalloc, mempool_kfree,
60 * A mempool_alloc_t and mempool_free_t for a simple page allocator that
61 * allocates pages of the order specified by pool_data
63 void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data);
64 void mempool_free_pages(void *element, void *pool_data);
65 static inline mempool_t *mempool_create_page_pool(int min_nr, int order)
67 return mempool_create(min_nr, mempool_alloc_pages, mempool_free_pages,
71 #endif /* _LINUX_MEMPOOL_H */