2 * This module derived from code donated to the FreeBSD Project by
3 * Matthew Dillon <dillon@backplane.com>
5 * Copyright (c) 1998 The FreeBSD Project
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #define USEGUARD /* use stard/end guard bytes */
38 #define DMALLOCDEBUG /* add debugging code to gather stats */
41 #include <sys/stdint.h>
43 #include "zalloc_mem.h"
45 #define Library extern
48 * block extension for sbrk()
51 #define BLKEXTEND (4 * 1024)
52 #define BLKEXTENDMASK (BLKEXTEND - 1)
55 * required malloc alignment. Just hardwire to 16.
57 * Note: if we implement a more sophisticated realloc, we should ensure that
58 * MALLOCALIGN is at least as large as MemNode.
61 typedef struct Guard {
63 size_t ga_Magic; /* must be at least 32 bits */
66 #define MALLOCALIGN 16
67 #define GAMAGIC 0x55FF44FD
68 #define GAFREE 0x5F54F4DF
70 #include "zalloc_protos.h"