1#ifndef MEM_POOL_H 2#define MEM_POOL_H 3 4struct mp_block { 5 struct mp_block *next_block; 6 char *next_free; 7 char *end; 8 uintmax_t space[FLEX_ARRAY]; /* more */ 9}; 10 11struct mem_pool { 12 struct mp_block *mp_block; 13 14 /* 15 * The amount of available memory to grow the pool by. 16 * This size does not include the overhead for the mp_block. 17 */ 18 size_t block_alloc; 19 20 /* The total amount of memory allocated by the pool. */ 21 size_t pool_alloc; 22}; 23 24/* 25 * Initialize mem_pool with specified initial size. 26 */ 27void mem_pool_init(struct mem_pool **mem_pool, size_t initial_size); 28 29/* 30 * Discard a memory pool and free all the memory it is responsible for. 31 */ 32void mem_pool_discard(struct mem_pool *mem_pool); 33 34/* 35 * Alloc memory from the mem_pool. 36 */ 37void *mem_pool_alloc(struct mem_pool *pool, size_t len); 38 39/* 40 * Allocate and zero memory from the memory pool. 41 */ 42void *mem_pool_calloc(struct mem_pool *pool, size_t count, size_t size); 43 44/* 45 * Move the memory associated with the 'src' pool to the 'dst' pool. The 'src' 46 * pool will be empty and not contain any memory. It still needs to be free'd 47 * with a call to `mem_pool_discard`. 48 */ 49void mem_pool_combine(struct mem_pool *dst, struct mem_pool *src); 50 51/* 52 * Check if a memory pointed at by 'mem' is part of the range of 53 * memory managed by the specified mem_pool. 54 */ 55int mem_pool_contains(struct mem_pool *mem_pool, void *mem); 56 57#endif