1 /* $OpenBSD: monitor_mm.h,v 1.6 2014/01/04 17:50:55 tedu 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 
31 struct mm_share {
32 	RB_ENTRY(mm_share) next;
33 	void *address;
34 	size_t size;
35 };
36 
37 struct mm_master {
38 	RB_HEAD(mmtree, mm_share) rb_free;
39 	struct mmtree rb_allocated;
40 	void *address;
41 	size_t size;
42 
43 	struct mm_master *mmalloc;	/* Used to completely share */
44 };
45 
46 RB_PROTOTYPE(mmtree, mm_share, next, mm_compare)
47 
48 #define MM_MINSIZE		128
49 
50 #define MM_ADDRESS_END(x)	(void *)((char *)(x)->address + (x)->size)
51 
52 struct mm_master *mm_create(struct mm_master *, size_t);
53 void mm_destroy(struct mm_master *);
54 
55 void mm_share_sync(struct mm_master **, struct mm_master **);
56 
57 void *mm_malloc(struct mm_master *, size_t);
58 void *mm_xmalloc(struct mm_master *, size_t);
59 void mm_free(struct mm_master *, void *);
60 
61 void mm_memvalid(struct mm_master *, void *, size_t);
62 #endif /* _MM_H_ */
63