diff options
Diffstat (limited to 'include/linux/mempool.h')
| -rw-r--r-- | include/linux/mempool.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/include/linux/mempool.h b/include/linux/mempool.h new file mode 100644 index 000000000000..4a36edf1c974 --- /dev/null +++ b/include/linux/mempool.h @@ -0,0 +1,37 @@ +/* + * memory buffer pool support + */ +#ifndef _LINUX_MEMPOOL_H +#define _LINUX_MEMPOOL_H + +#include <linux/wait.h> + +typedef void * (mempool_alloc_t)(unsigned int __nocast gfp_mask, void *pool_data); +typedef void (mempool_free_t)(void *element, void *pool_data); + +typedef struct mempool_s { + spinlock_t lock; + int min_nr; /* nr of elements at *elements */ + int curr_nr; /* Current nr of elements at *elements */ + void **elements; + + void *pool_data; + mempool_alloc_t *alloc; + mempool_free_t *free; + wait_queue_head_t wait; +} mempool_t; +extern mempool_t * mempool_create(int min_nr, mempool_alloc_t *alloc_fn, + mempool_free_t *free_fn, void *pool_data); +extern int mempool_resize(mempool_t *pool, int new_min_nr, unsigned int __nocast gfp_mask); +extern void mempool_destroy(mempool_t *pool); +extern void * mempool_alloc(mempool_t *pool, unsigned int __nocast gfp_mask); +extern void mempool_free(void *element, mempool_t *pool); + +/* + * A mempool_alloc_t and mempool_free_t that get the memory from + * a slab that is passed in through pool_data. + */ +void *mempool_alloc_slab(unsigned int __nocast gfp_mask, void *pool_data); +void mempool_free_slab(void *element, void *pool_data); + +#endif /* _LINUX_MEMPOOL_H */ |