lib/libstand/zalloc_defs.h

   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: src/lib/libstand/zalloc_defs.h,v 1.6 1999/08/28 00:05:35 peter Exp $
  30  * $DragonFly: src/lib/libstand/zalloc_defs.h,v 1.4 2008/06/05 18:01:49 swildner Exp $
  31  */
  32
  33 /*
  34  * DEFS.H
  35  */
  36
  37 #define USEGUARD                /* use stard/end guard bytes */
  38 #define USEENDGUARD
  39 #define DMALLOCDEBUG            /* add debugging code to gather stats */
  40 #define ZALLOCDEBUG
  41
  42 #include <string.h>
  43 #include "stand.h"
  44
  45 #include "zalloc_mem.h"
  46
  47 #define Prototype extern
  48 #define Library extern
  49
  50 /*
  51  * block extension for sbrk()
  52  */
  53
  54 #define BLKEXTEND       (4 * 1024)
  55 #define BLKEXTENDMASK   (BLKEXTEND - 1)
  56
  57 /*
  58  * required malloc alignment.  Just hardwire to 16.
  59  *
  60  * Note: if we implement a more sophisticated realloc, we should ensure that
  61  * MALLOCALIGN is at least as large as MemNode.
  62  */
  63
  64 typedef struct Guard {
  65     size_t      ga_Bytes;
  66     size_t      ga_Magic;       /* must be at least 32 bits */
  67 } Guard;
  68
  69 #define MALLOCALIGN     16      /* at least as large a sizeof(sturct Guard) */
  70 #define GAMAGIC         0x55FF44FD
  71
  72 #include "zalloc_protos.h"
  73