lib/libstand/zalloc_mem.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_mem.h,v 1.3 1999/08/28 00:05:35 peter Exp $
  30  * $DragonFly: src/lib/libstand/zalloc_mem.h,v 1.2 2003/06/17 06:26:51 dillon Exp $
  31  */
  32
  33 /*
  34  * H/MEM.H
  35  *
  36  * Basic memory pool / memory node structures.
  37  */
  38
  39 typedef struct MemNode {
  40     struct MemNode      *mr_Next;
  41     iaddr_t             mr_Bytes;
  42 } MemNode;
  43
  44 typedef struct MemPool {
  45     void                *mp_Base;
  46     void                *mp_End;
  47     MemNode             *mp_First;
  48     iaddr_t             mp_Size;
  49     iaddr_t             mp_Used;
  50 } MemPool;
  51
  52 #define MEMNODE_SIZE_MASK       ((sizeof(MemNode) <= 8) ? 7 : 15)
  53
  54 #define ZNOTE_FREE      0
  55 #define ZNOTE_REUSE     1
  56