1 /* SPDX-License-Identifier: BSD-2-Clause */ 2 /* 3 * Copyright (c) 2018, Linaro Limited 4 */ 5 6 #ifndef __MEMPOOL_H 7 #define __MEMPOOL_H 8 9 #include <types_ext.h> 10 11 /* 12 * struct mempool_item - internal struct to keep track of an item 13 */ 14 struct mempool_item { 15 size_t size; 16 ssize_t prev_item_offset; 17 ssize_t next_item_offset; 18 }; 19 20 struct mempool; 21 22 /* 23 * mempool_alloc_pool() - Allocate a new memory pool 24 * @data: a block of memory to carve out items from 25 * @size: size fo the block of memory 26 * @release_mem: function to call when the pool has been emptied, 27 * ignored if NULL. 28 * returns a pointer to a valid pool on success or NULL on failure. 29 */ 30 struct mempool *mempool_alloc_pool(void *data, size_t size, 31 void (*release_mem)(void *ptr, size_t size)); 32 33 /* 34 * mempool_alloc() - Allocate an item from a memory pool 35 * @pool: A memory pool created with mempool_alloc_pool() 36 * @size: Size in bytes of the item to allocate 37 * return a valid pointer on success or NULL on failure. 38 */ 39 void *mempool_alloc(struct mempool *pool, size_t size); 40 41 /* 42 * mempool_calloc() - Allocate and zero initialize an array of elements from a 43 * memory pool 44 * @pool: A memory pool created with mempool_alloc_pool() 45 * @nmemb: Number of elements in the array 46 * @size: Size in bytes of each element in the array 47 * return a valid pointer on success or NULL on failure. 48 */ 49 void *mempool_calloc(struct mempool *pool, size_t nmemb, size_t size); 50 51 /* 52 * mempool_free() - Frees a previously allocated item 53 * @pool: A memory pool create with mempool_alloc_pool() 54 * @ptr: A pointer to a previously allocated item 55 */ 56 void mempool_free(struct mempool *pool, void *ptr); 57 58 #endif /*__MEMPOOL_H*/ 59