projects / linux-2.6-block.git / blame
| 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> | |
| 48a27055 | 8 | #include <linux/compiler.h> |
| 1da177e4 | 9 | |
| fec433aa MD |
10 | struct kmem_cache; |
| 11 | ||
| dd0fc66f | 12 | typedef void * (mempool_alloc_t)(gfp_t gfp_mask, void *pool_data); |
| 1da177e4 LT |
13 | typedef void (mempool_free_t)(void *element, void *pool_data); |
| 14 | ||
| 15 | typedef struct mempool_s { | |
| 16 | spinlock_t lock; | |
| 17 | int min_nr; /* nr of elements at *elements */ | |
| 18 | int curr_nr; /* Current nr of elements at *elements */ | |
| 19 | void **elements; | |
| 20 | ||
| 21 | void *pool_data; | |
| 22 | mempool_alloc_t *alloc; | |
| 23 | mempool_free_t *free; | |
| 24 | wait_queue_head_t wait; | |
| 25 | } mempool_t; | |
| 1946089a CL |
26 | |
| 27 | extern mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn, | |
| 28 | mempool_free_t *free_fn, void *pool_data); | |
| 29 | extern mempool_t *mempool_create_node(int min_nr, mempool_alloc_t *alloc_fn, | |
| a91a5ac6 TH |
30 | mempool_free_t *free_fn, void *pool_data, |
| 31 | gfp_t gfp_mask, int nid); | |
| 1946089a | 32 | |
| 11d83360 | 33 | extern int mempool_resize(mempool_t *pool, int new_min_nr); |
| 1da177e4 | 34 | extern void mempool_destroy(mempool_t *pool); |
| 48a27055 | 35 | extern void *mempool_alloc(mempool_t *pool, gfp_t gfp_mask) __malloc; |
| 1da177e4 LT |
36 | extern void mempool_free(void *element, mempool_t *pool); |
| 37 | ||
| 38 | /* | |
| 39 | * A mempool_alloc_t and mempool_free_t that get the memory from | |
| e244c9e6 DR |
40 | * a slab cache that is passed in through pool_data. |
| 41 | * Note: the slab cache may not have a ctor function. | |
| 1da177e4 | 42 | */ |
| dd0fc66f | 43 | void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data); |
| 1da177e4 | 44 | void mempool_free_slab(void *element, void *pool_data); |
| fec433aa MD |
45 | static inline mempool_t * |
| 46 | mempool_create_slab_pool(int min_nr, struct kmem_cache *kc) | |
| 47 | { | |
| 48 | return mempool_create(min_nr, mempool_alloc_slab, mempool_free_slab, | |
| 49 | (void *) kc); | |
| 50 | } | |
| 1da177e4 | 51 | |
| 53184082 | 52 | /* |
| bba78819 SW |
53 | * a mempool_alloc_t and a mempool_free_t to kmalloc and kfree the |
| 54 | * amount of memory specified by pool_data | |
| 53184082 MD |
55 | */ |
| 56 | void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data); | |
| 57 | void mempool_kfree(void *element, void *pool_data); | |
| 58 | static inline mempool_t *mempool_create_kmalloc_pool(int min_nr, size_t size) | |
| 59 | { | |
| 60 | return mempool_create(min_nr, mempool_kmalloc, mempool_kfree, | |
| 61 | (void *) size); | |
| 62 | } | |
| 63 | ||
| 6e0678f3 MD |
64 | /* |
| 65 | * A mempool_alloc_t and mempool_free_t for a simple page allocator that | |
| 66 | * allocates pages of the order specified by pool_data | |
| 67 | */ | |
| 68 | void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data); | |
| 69 | void mempool_free_pages(void *element, void *pool_data); | |
| 70 | static inline mempool_t *mempool_create_page_pool(int min_nr, int order) | |
| 71 | { | |
| 72 | return mempool_create(min_nr, mempool_alloc_pages, mempool_free_pages, | |
| 73 | (void *)(long)order); | |
| 74 | } | |
| 75 | ||
| 1da177e4 | 76 | #endif /* _LINUX_MEMPOOL_H */ |