1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
|
/* Flags for BSD-style memory management. OSF/1 version.
Copyright (C) 1994, 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _BITS_MMAN_H
#define _BITS_MMAN_H 1
/* Protections are chosen from these bits, OR'd together. The
implementation does not necessarily support PROT_EXEC or PROT_WRITE
without PROT_READ. The only guarantees are that no writing will be
allowed without PROT_WRITE and no access will be allowed for PROT_NONE. */
#define PROT_NONE 0x00 /* No access. */
#define PROT_READ 0x01 /* Pages can be read. */
#define PROT_WRITE 0x02 /* Pages can be written. */
#define PROT_EXEC 0x04 /* Pages can be executed. */
/* Flags contain mapping type, sharing type and options. */
/* Mapping type (must choose one and only one of these). */
#ifdef __USE_BSD
# define MAP_FILE 0x00 /* Mapped from a file or device. */
# define MAP_ANON 0x10 /* Allocated from anonymous virtual memory. */
# define MAP_ANONYMOUS MAP_ANON
# define MAP_TYPE 0xf0 /* Mask for type field. */
#endif
/* Sharing types (must choose one and only one of these). */
#define MAP_SHARED 0x01 /* Share changes. */
#define MAP_PRIVATE 0x02 /* Changes private; copy pages on write. */
/* Other flags. */
#define MAP_FIXED 0x0100 /* Map address must be exactly as requested. */
#ifdef __USE_BSD
# define MAP_VARIABLE 0 /* Absence of MAP_FIXED. */
# define MAP_HASSEMPHORE 0x0200 /* Region may contain semaphores. */
# define MAP_INHERIT 0x0400 /* Region is retained after exec. */
# define MAP_UNALIGNED 0x0800 /* File offset need not be page-aligned. */
#endif
/* Advice to `madvise'. */
#ifdef __USE_BSD
# define MADV_NORMAL 0 /* No further special treatment. */
# define MADV_RANDOM 1 /* Expect random page references. */
# define MADV_SEQUENTIAL 2 /* Expect sequential page references. */
# define MADV_WILLNEED 3 /* Will need these pages. */
# define MADV_DONTNEED 4 /* Don't need these pages. */
# define MADV_SPACEAVAIL 5 /* Ensure that resources are available. */
#endif
/* Flags to `msync'. */
#define MS_ASYNC 1 /* Asynchronous cache flush. */
#define MS_SYNC 3 /* Synchronous cache flush. */
#define MS_INVALIDATE 4 /* Invalidate cached pages. */
#endif /* bits/mman.h */
|
