FreeBSD/Linux Kernel Cross Reference
sys/sys/mman.h
1 /* $OpenBSD: mman.h,v 1.35 2022/10/07 14:59:39 deraadt 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 #ifndef _KERNEL
36 #include <sys/cdefs.h>
37 #endif
38
39 /*
40 * Protections are chosen from these bits, or-ed together
41 */
42 #define PROT_NONE 0x00 /* no permissions */
43 #define PROT_READ 0x01 /* pages can be read */
44 #define PROT_WRITE 0x02 /* pages can be written */
45 #define PROT_EXEC 0x04 /* pages can be executed */
46
47 /*
48 * Flags contain sharing type and options.
49 * Sharing types; choose one.
50 */
51 #define MAP_SHARED 0x0001 /* share changes */
52 #define MAP_PRIVATE 0x0002 /* changes are private */
53
54 /*
55 * Other flags
56 */
57 #define MAP_FIXED 0x0010 /* map addr must be exactly as requested */
58 #define __MAP_NOREPLACE 0x0800 /* fail if address not available */
59 #define MAP_ANON 0x1000 /* allocated from memory, swap space */
60 #define MAP_ANONYMOUS MAP_ANON /* alternate POSIX spelling */
61 #define __MAP_NOFAULT 0x2000
62 #define MAP_STACK 0x4000 /* mapping is used for a stack */
63 #define MAP_CONCEAL 0x8000 /* omit from dumps */
64
65 #define MAP_FLAGMASK 0xfff7
66
67 #ifndef _KERNEL
68 /*
69 * Legacy defines for userland source compatibility.
70 * Can be removed once no longer needed in base and ports.
71 */
72 #define MAP_COPY MAP_PRIVATE /* "copy" region at mmap time */
73 #define MAP_FILE 0 /* map from file (default) */
74 #define MAP_HASSEMAPHORE 0 /* region may contain semaphores */
75 #define MAP_INHERIT 0 /* region is retained after exec */
76 #define MAP_NOEXTEND 0 /* for MAP_FILE, don't change file size */
77 #define MAP_NORESERVE 0 /* Sun: don't reserve needed swap area */
78 #define MAP_RENAME 0 /* Sun: rename private pages to file */
79 #define MAP_TRYFIXED 0 /* attempt hint address, even within heap */
80 #endif
81
82 /*
83 * Error return from mmap()
84 */
85 #define MAP_FAILED ((void *)-1)
86
87 /*
88 * POSIX memory advisory values.
89 * Note: keep consistent with the original definitions below.
90 */
91 #define POSIX_MADV_NORMAL 0 /* no further special treatment */
92 #define POSIX_MADV_RANDOM 1 /* expect random page references */
93 #define POSIX_MADV_SEQUENTIAL 2 /* expect sequential page references */
94 #define POSIX_MADV_WILLNEED 3 /* will need these pages */
95 #define POSIX_MADV_DONTNEED 4 /* don't need these pages */
96
97 #if __BSD_VISIBLE
98 /*
99 * Original advice values, equivalent to POSIX definitions,
100 * and few implementation-specific ones. For in-kernel and historic use.
101 */
102 #define MADV_NORMAL POSIX_MADV_NORMAL
103 #define MADV_RANDOM POSIX_MADV_RANDOM
104 #define MADV_SEQUENTIAL POSIX_MADV_SEQUENTIAL
105 #define MADV_WILLNEED POSIX_MADV_WILLNEED
106 #define MADV_DONTNEED POSIX_MADV_DONTNEED
107 #define MADV_SPACEAVAIL 5 /* insure that resources are reserved */
108 #define MADV_FREE 6 /* pages are empty, free them */
109 #endif
110
111 /*
112 * Flags to minherit
113 */
114 #define MAP_INHERIT_SHARE 0 /* share with child */
115 #define MAP_INHERIT_COPY 1 /* copy into child */
116 #define MAP_INHERIT_NONE 2 /* absent from child */
117 #define MAP_INHERIT_ZERO 3 /* zero in child */
118
119 /*
120 * Flags to msync
121 */
122 #define MS_ASYNC 0x01 /* perform asynchronous writes */
123 #define MS_SYNC 0x02 /* perform synchronous writes */
124 #define MS_INVALIDATE 0x04 /* invalidate cached data */
125
126 /*
127 * Flags to mlockall
128 */
129 #define MCL_CURRENT 0x01 /* lock all pages currently mapped */
130 #define MCL_FUTURE 0x02 /* lock all pages mapped in the future */
131
132 #ifndef _KERNEL
133 #include <sys/_types.h>
134
135 #ifndef _SIZE_T_DEFINED_
136 #define _SIZE_T_DEFINED_
137 typedef __size_t size_t;
138 #endif
139
140 #ifndef _OFF_T_DEFINED_
141 #define _OFF_T_DEFINED_
142 typedef __off_t off_t;
143 #endif
144
145 __BEGIN_DECLS
146 void * mmap(void *, size_t, int, int, int, off_t);
147 int mprotect(void *, size_t, int);
148 int munmap(void *, size_t);
149 int msync(void *, size_t, int);
150 int mlock(const void *, size_t);
151 int munlock(const void *, size_t);
152 int mlockall(int);
153 int munlockall(void);
154 #if __BSD_VISIBLE
155 int madvise(void *, size_t, int);
156 int minherit(void *, size_t, int);
157 int mimmutable(void *, size_t);
158 void * mquery(void *, size_t, int, int, int, off_t);
159 #endif
160 int posix_madvise(void *, size_t, int);
161 int shm_open(const char *, int, __mode_t);
162 int shm_unlink(const char *);
163 int shm_mkstemp(char *);
164 __END_DECLS
165
166 #endif /* !_KERNEL */
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