| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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; |
| Christoph Lameter | 1946089 | 2005-06-23 00:08:19 -0700 | [diff] [blame] | 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); |
| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 */ |