monitor_mm.h revision 99060 
1/*	$OpenBSD: monitor_mm.h,v 1.2 2002/03/26 03:24:01 stevesk Exp $	*/
2
3/*
4 * Copyright 2002 Niels Provos <provos@citi.umich.edu>
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28#ifndef _MM_H_
29#define _MM_H_
30#include "openbsd-compat/tree.h"
31
32struct mm_share {
33	RB_ENTRY(mm_share) next;
34	void *address;
35	size_t size;
36};
37
38struct mm_master {
39	RB_HEAD(mmtree, mm_share) rb_free;
40	struct mmtree rb_allocated;
41	void *address;
42	size_t size;
43
44	struct mm_master *mmalloc;	/* Used to completely share */
45
46	int write;		/* used to writing to other party */
47	int read;		/* used for reading from other party */
48};
49
50RB_PROTOTYPE(mmtree, mm_share, next, mm_compare)
51
52#define MM_MINSIZE		128
53
54#define MM_ADDRESS_END(x)	(void *)((u_char *)(x)->address + (x)->size)
55
56struct mm_master *mm_create(struct mm_master *, size_t);
57void mm_destroy(struct mm_master *);
58
59void mm_share_sync(struct mm_master **, struct mm_master **);
60
61void *mm_malloc(struct mm_master *, size_t);
62void *mm_xmalloc(struct mm_master *, size_t);
63void mm_free(struct mm_master *, void *);
64
65void mm_memvalid(struct mm_master *, void *, size_t);
66#endif /* _MM_H_ */
67