1 /* SPDX-License-Identifier: LGPL-2.1+ */
3 This file is part of systemd.
5 Copyright 2010-2014 Lennart Poettering
6 Copyright 2014 Michal Schmidt
22 void* mempool_alloc_tile(struct mempool *mp) {
25 /* When a tile is released we add it to the list and simply
26 * place the next pointer at its offset 0. */
28 assert(mp->tile_size >= sizeof(void*));
29 assert(mp->at_least > 0);
35 mp->freelist = * (void**) mp->freelist;
39 if (_unlikely_(!mp->first_pool) ||
40 _unlikely_(mp->first_pool->n_used >= mp->first_pool->n_tiles)) {
45 n = mp->first_pool ? mp->first_pool->n_tiles : 0;
46 n = MAX(mp->at_least, n * 2);
47 size = PAGE_ALIGN(ALIGN(sizeof(struct pool)) + n*mp->tile_size);
48 n = (size - ALIGN(sizeof(struct pool))) / mp->tile_size;
54 p->next = mp->first_pool;
61 i = mp->first_pool->n_used++;
63 return ((uint8_t*) mp->first_pool) + ALIGN(sizeof(struct pool)) + i*mp->tile_size;
66 void* mempool_alloc0_tile(struct mempool *mp) {
69 p = mempool_alloc_tile(mp);
71 memzero(p, mp->tile_size);
75 void mempool_free_tile(struct mempool *mp, void *p) {
76 * (void**) p = mp->freelist;
82 void mempool_drop(struct mempool *mp) {
83 struct pool *p = mp->first_pool;