LXR linux/include/linux/mempool.h

   1/*
   2 * memory buffer pool support
   3 */
   4#ifndef _LINUX_MEMPOOL_H
   5#define _LINUX_MEMPOOL_H
   6
   7#include <linux/wait.h>
   8
   9typedef void * (mempool_alloc_t)(int gfp_mask, void *pool_data);
  10typedef void (mempool_free_t)(void *element, void *pool_data);
  11
  12typedef 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;
  23extern mempool_t * mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
  24                                 mempool_free_t *free_fn, void *pool_data);
  25extern int mempool_resize(mempool_t *pool, int new_min_nr, int gfp_mask);
  26extern void mempool_destroy(mempool_t *pool);
  27extern void * mempool_alloc(mempool_t *pool, int gfp_mask);
  28extern 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 */
  34void *mempool_alloc_slab(int gfp_mask, void *pool_data);
  35void mempool_free_slab(void *element, void *pool_data);
  36
  37#endif /* _LINUX_MEMPOOL_H */
  38