MFC 1.36: Fix a bug in the mount scan.
[dragonfly.git] / lib / libstand / zalloc_mem.h
blob8afa14e7b75933faaff06d2258a96981793ff59e
1 /*
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
6 * All rights reserved.
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.
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.
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 04:26:51 dillon Exp $
34 * H/MEM.H
36 * Basic memory pool / memory node structures.
39 typedef struct MemNode {
40 struct MemNode *mr_Next;
41 iaddr_t mr_Bytes;
42 } MemNode;
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;
52 #define MEMNODE_SIZE_MASK ((sizeof(MemNode) <= 8) ? 7 : 15)
54 #define ZNOTE_FREE 0
55 #define ZNOTE_REUSE 1