Commit | Line | Data |
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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 | ||
9 | typedef void * (mempool_alloc_t)(unsigned int __nocast gfp_mask, void *pool_data); | |
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 | ||
29 | extern int mempool_resize(mempool_t *pool, int new_min_nr, | |
30 | unsigned int __nocast gfp_mask); | |
1da177e4 LT |
31 | extern void mempool_destroy(mempool_t *pool); |
32 | extern void * mempool_alloc(mempool_t *pool, unsigned int __nocast gfp_mask); | |
33 | extern void mempool_free(void *element, mempool_t *pool); | |
34 | ||
35 | /* | |
36 | * A mempool_alloc_t and mempool_free_t that get the memory from | |
37 | * a slab that is passed in through pool_data. | |
38 | */ | |
39 | void *mempool_alloc_slab(unsigned int __nocast gfp_mask, void *pool_data); | |
40 | void mempool_free_slab(void *element, void *pool_data); | |
41 | ||
42 | #endif /* _LINUX_MEMPOOL_H */ |