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; 23 extern mempool_t * mempool_create(int min_nr, mempool_alloc_t *alloc_fn, 24 mempool_free_t *free_fn, void *pool_data); 25 extern int mempool_resize(mempool_t *pool, int new_min_nr, unsigned int __nocast gfp_mask); 26 extern void mempool_destroy(mempool_t *pool); 27 extern void * mempool_alloc(mempool_t *pool, unsigned int __nocast gfp_mask); 28 extern void mempool_free(void *element, mempool_t *pool); 29 30 /* 31 * A mempool_alloc_t and mempool_free_t that get the memory from 32 * a slab that is passed in through pool_data. 33 */ 34 void *mempool_alloc_slab(unsigned int __nocast gfp_mask, void *pool_data); 35 void mempool_free_slab(void *element, void *pool_data); 36 37 #endif /* _LINUX_MEMPOOL_H */ 38