Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * memory buffer pool support | |
3 | */ | |
4 | #ifndef _LINUX_MEMPOOL_H | |
5 | #define _LINUX_MEMPOOL_H | |
6 | ||
7 | #include <linux/wait.h> | |
8 | ||
dd0fc66f | 9 | typedef void * (mempool_alloc_t)(gfp_t gfp_mask, void *pool_data); |
1da177e4 LT |
10 | typedef void (mempool_free_t)(void *element, void *pool_data); |
11 | ||
12 | typedef struct mempool_s { | |
13 | spinlock_t lock; | |
14 | int min_nr; /* nr of elements at *elements */ | |
15 | int curr_nr; /* Current nr of elements at *elements */ | |
16 | void **elements; | |
17 | ||
18 | void *pool_data; | |
19 | mempool_alloc_t *alloc; | |
20 | mempool_free_t *free; | |
21 | wait_queue_head_t wait; | |
22 | } mempool_t; | |
1946089a CL |
23 | |
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); | |
28 | ||
dd0fc66f | 29 | extern int mempool_resize(mempool_t *pool, int new_min_nr, gfp_t gfp_mask); |
1da177e4 | 30 | extern void mempool_destroy(mempool_t *pool); |
dd0fc66f | 31 | extern void * mempool_alloc(mempool_t *pool, gfp_t gfp_mask); |
1da177e4 LT |
32 | extern void mempool_free(void *element, mempool_t *pool); |
33 | ||
34 | /* | |
35 | * A mempool_alloc_t and mempool_free_t that get the memory from | |
36 | * a slab that is passed in through pool_data. | |
37 | */ | |
dd0fc66f | 38 | void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data); |
1da177e4 LT |
39 | void mempool_free_slab(void *element, void *pool_data); |
40 | ||
6e0678f3 MD |
41 | /* |
42 | * A mempool_alloc_t and mempool_free_t for a simple page allocator that | |
43 | * allocates pages of the order specified by pool_data | |
44 | */ | |
45 | void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data); | |
46 | void mempool_free_pages(void *element, void *pool_data); | |
47 | static inline mempool_t *mempool_create_page_pool(int min_nr, int order) | |
48 | { | |
49 | return mempool_create(min_nr, mempool_alloc_pages, mempool_free_pages, | |
50 | (void *)(long)order); | |
51 | } | |
52 | ||
1da177e4 | 53 | #endif /* _LINUX_MEMPOOL_H */ |