Port fix: Windows does not allow read-only mappings > file's size
[babeltrace.git] / include / babeltrace / compat / mman-internal.h
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1#ifndef _BABELTRACE_COMPAT_MMAN_H
2#define _BABELTRACE_COMPAT_MMAN_H
3
4/*
5 * babeltrace/compat/mman.h
6 *
8f76831a 7 * Copyright (C) 2015-2016 Michael Jeanson <mjeanson@efficios.com>
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8 *
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
15 *
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
18 *
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 * SOFTWARE.
26 */
27
04394229 28#ifdef __MINGW32__
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29
30#include <sys/types.h>
31
32#define PROT_NONE 0x0
33#define PROT_READ 0x1
34#define PROT_WRITE 0x2
35#define PROT_EXEC 0x4
36
37#define MAP_FILE 0
38#define MAP_SHARED 1
39#define MAP_PRIVATE 2
40#define MAP_TYPE 0xF
41#define MAP_FIXED 0x10
42#define MAP_ANONYMOUS 0x20
43#define MAP_ANON MAP_ANONYMOUS
44#define MAP_FAILED ((void *) -1)
45
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46/*
47 * Note that some platforms (e.g. Windows) do not allow read-only
48 * mappings to exceed the file's size (even within a page).
49 */
04394229 50void *bt_mmap(void *addr, size_t length, int prot, int flags, int fd,
8f76831a 51 off_t offset);
8f76831a 52
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53int bt_munmap(void *addr, size_t length);
54
55#else /* __MINGW32__ */
56
57#include <sys/mman.h>
58
59static inline
60void *bt_mmap(void *addr, size_t length, int prot, int flags, int fd,
61 off_t offset)
62{
63 return (void *) mmap(addr, length, prot, flags, fd, offset);
64}
65
66static inline
67int bt_munmap(void *addr, size_t length)
68{
69 return munmap(addr, length);
70}
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71#endif /* __MINGW32__ */
72
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73#ifndef MAP_ANONYMOUS
74# ifdef MAP_ANON
75# define MAP_ANONYMOUS MAP_ANON
76# endif
77#endif
78
79#endif /* _BABELTRACE_COMPAT_MMAN_H */
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