linux/include/linux/mempool.h

/* SPDX-License-Identifier: GPL-2.0 */
/*
 * memory buffer pool support
 */
#ifndef _LINUX_MEMPOOL_H
#define _LINUX_MEMPOOL_H

#include <linux/sched.h>
#include <linux/alloc_tag.h>
#include <linux/wait.h>
#include <linux/compiler.h>

struct kmem_cache;

mempool_alloc_t;
mempool_free_t;

mempool_t;

static inline bool mempool_initialized(mempool_t *pool)
{ … }

static inline bool mempool_is_saturated(mempool_t *pool)
{ … }

void mempool_exit(mempool_t *pool);
int mempool_init_node(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
		      mempool_free_t *free_fn, void *pool_data,
		      gfp_t gfp_mask, int node_id);

int mempool_init_noprof(mempool_t *pool, int min_nr, mempool_alloc_t *alloc_fn,
		 mempool_free_t *free_fn, void *pool_data);
#define mempool_init(...) …

extern mempool_t *mempool_create(int min_nr, mempool_alloc_t *alloc_fn,
			mempool_free_t *free_fn, void *pool_data);

extern mempool_t *mempool_create_node_noprof(int min_nr, mempool_alloc_t *alloc_fn,
			mempool_free_t *free_fn, void *pool_data,
			gfp_t gfp_mask, int nid);
#define mempool_create_node(...) …

#define mempool_create(_min_nr, _alloc_fn, _free_fn, _pool_data) …

extern int mempool_resize(mempool_t *pool, int new_min_nr);
extern void mempool_destroy(mempool_t *pool);

extern void *mempool_alloc_noprof(mempool_t *pool, gfp_t gfp_mask) __malloc;
#define mempool_alloc(...) …

extern void *mempool_alloc_preallocated(mempool_t *pool) __malloc;
extern void mempool_free(void *element, mempool_t *pool);

/*
 * A mempool_alloc_t and mempool_free_t that get the memory from
 * a slab cache that is passed in through pool_data.
 * Note: the slab cache may not have a ctor function.
 */
void *mempool_alloc_slab(gfp_t gfp_mask, void *pool_data);
void mempool_free_slab(void *element, void *pool_data);

#define mempool_init_slab_pool(_pool, _min_nr, _kc) …
#define mempool_create_slab_pool(_min_nr, _kc) …

/*
 * a mempool_alloc_t and a mempool_free_t to kmalloc and kfree the
 * amount of memory specified by pool_data
 */
void *mempool_kmalloc(gfp_t gfp_mask, void *pool_data);
void mempool_kfree(void *element, void *pool_data);

#define mempool_init_kmalloc_pool(_pool, _min_nr, _size) …
#define mempool_create_kmalloc_pool(_min_nr, _size) …

void *mempool_kvmalloc(gfp_t gfp_mask, void *pool_data);
void mempool_kvfree(void *element, void *pool_data);

static inline int mempool_init_kvmalloc_pool(mempool_t *pool, int min_nr, size_t size)
{ … }

static inline mempool_t *mempool_create_kvmalloc_pool(int min_nr, size_t size)
{ … }

/*
 * A mempool_alloc_t and mempool_free_t for a simple page allocator that
 * allocates pages of the order specified by pool_data
 */
void *mempool_alloc_pages(gfp_t gfp_mask, void *pool_data);
void mempool_free_pages(void *element, void *pool_data);

#define mempool_init_page_pool(_pool, _min_nr, _order) …
#define mempool_create_page_pool(_min_nr, _order) …

#endif /* _LINUX_MEMPOOL_H */