zalloc_defs.h revision 261530 
1/*
2 * This module derived from code donated to the FreeBSD Project by
3 * Matthew Dillon <dillon@backplane.com>
4 *
5 * Copyright (c) 1998 The FreeBSD Project
6 * All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
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.
16 *
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
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: head/lib/libstand/zalloc_defs.h 261530 2014-02-05 22:53:58Z ian $
30 */
31
32/*
33 * DEFS.H
34 */
35
36#define USEGUARD		/* use stard/end guard bytes */
37#define USEENDGUARD
38#define DMALLOCDEBUG		/* add debugging code to gather stats */
39#define ZALLOCDEBUG
40
41#include <sys/stdint.h>
42#include "stand.h"
43#include "zalloc_mem.h"
44
45#define Library extern
46
47/*
48 * block extension for sbrk()
49 */
50
51#define BLKEXTEND	(4 * 1024)
52#define BLKEXTENDMASK	(BLKEXTEND - 1)
53
54/*
55 * Required malloc alignment.
56 *
57 * Embedded platforms using the u-boot API drivers require that all I/O buffers
58 * be on a cache line sized boundary.  The worst case size for that is 64 bytes.
59 * For other platforms, 16 bytes works fine.  The alignment also must be at
60 * least sizeof(struct MemNode); this is asserted in zalloc.c.
61 */
62
63#if defined(__arm__) || defined(__mips__) || defined(__powerpc__)
64#define	MALLOCALIGN		64
65#else
66#define	MALLOCALIGN		16
67#endif
68#define	MALLOCALIGN_MASK	(MALLOCALIGN - 1)
69
70typedef struct Guard {
71    size_t	ga_Bytes;
72    size_t	ga_Magic;	/* must be at least 32 bits */
73} Guard;
74
75#define GAMAGIC		0x55FF44FD
76#define GAFREE		0x5F54F4DF
77
78#include "zalloc_protos.h"
79