1 /* $OpenBSD: mman.h,v 1.18 2003/07/21 22:52:19 tedu Exp $ */
2 /* $NetBSD: mman.h,v 1.11 1995/03/26 20:24:23 jtc Exp $ */
3
4 /*-
5 * Copyright (c) 1982, 1986, 1993
6 * The Regents of the University of California. 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 * 3. Neither the name of the University nor the names of its contributors
17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 *
32 * @(#)mman.h 8.1 (Berkeley) 6/2/93
33 */
34
35 /*
36 * Protections are chosen from these bits, or-ed together
37 */
38 #define PROT_NONE 0x00 /* no permissions */
39 #define PROT_READ 0x01 /* pages can be read */
40 #define PROT_WRITE 0x02 /* pages can be written */
41 #define PROT_EXEC 0x04 /* pages can be executed */
42
43 /*
44 * Flags contain sharing type and options.
45 * Sharing types; choose one.
46 */
47 #define MAP_SHARED 0x0001 /* share changes */
48 #define MAP_PRIVATE 0x0002 /* changes are private */
49 #define MAP_COPY 0x0004 /* "copy" region at mmap time */
50
51 /*
52 * Other flags
53 */
54 #define MAP_FIXED 0x0010 /* map addr must be exactly as requested */
55 #define MAP_RENAME 0x0020 /* Sun: rename private pages to file */
56 #define MAP_NORESERVE 0x0040 /* Sun: don't reserve needed swap area */
57 #define MAP_INHERIT 0x0080 /* region is retained after exec */
58 #define MAP_NOEXTEND 0x0100 /* for MAP_FILE, don't change file size */
59 #define MAP_HASSEMAPHORE 0x0200 /* region may contain semaphores */
60 #define MAP_TRYFIXED 0x0400 /* attempt hint address, even within heap */
61
62 /*
63 * Error return from mmap()
64 */
65 #define MAP_FAILED ((void *)-1)
66
67 /*
68 * Mapping type
69 */
70 #define MAP_FILE 0x0000 /* map from file (default) */
71 #define MAP_ANON 0x1000 /* allocated from memory, swap space */
72 #define MAP_FLAGMASK 0x17f7
73
74 /*
75 * Advice to madvise
76 */
77 #define MADV_NORMAL 0 /* no further special treatment */
78 #define MADV_RANDOM 1 /* expect random page references */
79 #define MADV_SEQUENTIAL 2 /* expect sequential page references */
80 #define MADV_WILLNEED 3 /* will need these pages */
81 #define MADV_DONTNEED 4 /* dont need these pages */
82 #define MADV_SPACEAVAIL 5 /* insure that resources are reserved */
83 #define MADV_FREE 6 /* pages are empty, free them */
84
85 /*
86 * Flags to minherit
87 */
88 #define MAP_INHERIT_SHARE 0 /* share with child */
89 #define MAP_INHERIT_COPY 1 /* copy into child */
90 #define MAP_INHERIT_NONE 2 /* absent from child */
91 #define MAP_INHERIT_DONATE_COPY 3 /* copy and delete -- not
92 implemented in UVM */
93
94 /*
95 * Flags to msync
96 */
97 #define MS_ASYNC 0x01 /* perform asynchronous writes */
98 #define MS_SYNC 0x02 /* perform synchronous writes */
99 #define MS_INVALIDATE 0x04 /* invalidate cached data */
100
101 /*
102 * Flags to mlockall
103 */
104 #define MCL_CURRENT 0x01 /* lock all pages currently mapped */
105 #define MCL_FUTURE 0x02 /* lock all pages mapped in the future */
106
107 #ifndef _KERNEL
108
109 #include <sys/cdefs.h>
110
111 __BEGIN_DECLS
112 /* Some of these int's should probably be size_t's */
113 void * mmap(void *, size_t, int, int, int, off_t);
114 int mprotect(void *, size_t, int);
115 int munmap(void *, size_t);
116 int msync(void *, size_t, int);
117 int mlock(const void *, size_t);
118 int munlock(const void *, size_t);
119 int mlockall(int);
120 int munlockall(void);
121 int madvise(void *, size_t, int);
122 int mincore(void *, size_t, char *);
123 int minherit(void *, size_t, int);
124 void * mquery(void *, size_t, int, int, int, off_t);
125 __END_DECLS
126
127 #endif /* !_KERNEL */