2 * Copyright (C) 2009 Joseph Adams <joeyadams3.14159@gmail.com>
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 #ifndef CCAN_BLOCK_POOL
24 #define CCAN_BLOCK_POOL
26 #include <ccan/talloc/talloc.h>
31 /* Construct a new block pool.
32 ctx is a talloc context (or NULL if you don't know what talloc is ;) ) */
33 struct block_pool *block_pool_new(void *ctx);
35 /* Same as block_pool_alloc, but allows you to manually specify alignment.
36 For instance, strings need not be aligned, so set align=1 for them.
37 align must be a power of two. */
38 void *block_pool_alloc_align(struct block_pool *bp, size_t size, size_t align);
40 /* Allocate a block of a given size. The returned pointer will remain valid
41 for the life of the block_pool. The block cannot be resized or
42 freed individually. */
43 static inline void *block_pool_alloc(struct block_pool *bp, size_t size) {
44 size_t align = size & -size; //greatest power of two by which size is divisible
47 return block_pool_alloc_align(bp, size, align);
50 static inline void block_pool_free(struct block_pool *bp) {
55 char *block_pool_strdup(struct block_pool *bp, const char *str);
57 static inline void *block_pool_memdup(struct block_pool *bp, const void *src, size_t size) {
58 void *ret = block_pool_alloc(bp, size);
59 memcpy(ret, src, size);