blob: 0955975c65054fdcb3a81ed7da54f2d7f7188f09 (
plain)
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
|
/*
* Copyright (c) 2006-2021, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2017/11/30 Bernard The first version.
* 2024/03/29 TroyMitchelle Add comments for all macros
*/
#ifndef __SYS_MMAN_H__
#define __SYS_MMAN_H__
#ifdef __cplusplus
extern "C" {
#endif
#include <sys/types.h>
#define MAP_FAILED ((void *) -1)
/* mmap flags */
#define MAP_SHARED 0x01 /**< Share the mapping with other processes. */
#define MAP_PRIVATE 0x02 /**< Create a private copy-on-write mapping. */
#define MAP_TYPE 0x0f /**< Mask for type of mapping. */
#define MAP_FIXED 0x10 /**< Interpret addr exactly. */
#define MAP_ANON 0x20 /**< Anonymous mapping. */
#define MAP_ANONYMOUS MAP_ANON /**< Synonym for MAP_ANON. */
#define MAP_NORESERVE 0x4000 /**< Don't reserve swap space for this mapping. */
#define MAP_GROWSDOWN 0x0100 /**< Stack-like segment. */
#define MAP_DENYWRITE 0x0800 /**< ETXTBSY. */
#define MAP_EXECUTABLE 0x1000 /**< Mark it as an executable. */
#define MAP_LOCKED 0x2000 /**< Lock the mapping's pages. */
#define MAP_POPULATE 0x8000 /**< Populate (prefault) pagetables. */
#define MAP_NONBLOCK 0x10000 /**< Do not block on IO. */
#define MAP_STACK 0x20000 /**< Allocation is a stack segment. */
#define MAP_HUGETLB 0x40000 /**< Create a huge page mapping. */
#define MAP_FILE 0 /**< Compatibility */
/* mmap protections */
#define PROT_NONE 0 /**< No access. */
#define PROT_READ 1 /**< Page can be read. */
#define PROT_WRITE 2 /**< Page can be written. */
#define PROT_EXEC 4 /**< Page can be executed. */
#define PROT_GROWSDOWN 0x01000000/**< Extend change to start of growsdown vma (mprotect only). */
#define PROT_GROWSUP 0x02000000/**< Extend change to start of growsup vma (mprotect only). */
/* msync flags */
#define MS_ASYNC 1 /**< Perform asynchronous writes. */
#define MS_INVALIDATE 2 /**< Invalidate mappings after writing. */
#define MS_SYNC 4 /**< Perform synchronous writes. */
/* mlockall flags */
#define MCL_CURRENT 1 /**< Lock all pages which are currently mapped into the address space of the process. */
#define MCL_FUTURE 2 /**< Lock all pages which will become mapped into the address space of the process in the future. */
#define MCL_ONFAULT 4 /**< Lock all pages which are currently mapped into the address space of the process on access. */
void *mmap (void *start, size_t len, int prot, int flags, int fd, off_t off);
int munmap (void *start, size_t len);
#ifdef __cplusplus
}
#endif
#endif
|
