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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/**************************************************************************
*
* Copyright 2011 LunarG, Inc.
* All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the
* "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sub license, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice (including the
* next paragraph) shall be included in all copies or substantial portions
* of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
**************************************************************************/
/**
* @file
* OS independent memory mapping (with large file support).
*
* @author Chia-I Wu <olvaffe@gmail.com>
*/
#ifndef _OS_MMAN_H_
#define _OS_MMAN_H_
#include "pipe/p_config.h"
#include "pipe/p_compiler.h"
#if defined(PIPE_OS_UNIX)
# include <sys/mman.h>
#else
# error Unsupported OS
#endif
#if defined(PIPE_OS_ANDROID)
# include <errno.h> /* for EINVAL */
#endif
#ifdef __cplusplus
extern "C" {
#endif
#if defined(PIPE_OS_ANDROID)
extern void *__mmap2(void *, size_t, int, int, int, size_t);
static INLINE void *os_mmap(void *addr, size_t length, int prot, int flags,
int fd, loff_t offset)
{
/* offset must be aligned to 4096 (not necessarily the page size) */
if (unlikely(offset & 4095)) {
errno = EINVAL;
return MAP_FAILED;
}
return __mmap2(addr, length, prot, flags, fd, (size_t) (offset >> 12));
}
# define os_munmap(addr, length) \
munmap(addr, length)
#else
/* assume large file support exists */
# define os_mmap(addr, length, prot, flags, fd, offset) \
mmap(addr, length, prot, flags, fd, offset)
static INLINE int os_munmap(void *addr, size_t length)
{
/* Copied from configure code generated by AC_SYS_LARGEFILE */
#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + \
(((off_t) 1 << 31) << 31))
STATIC_ASSERT(LARGE_OFF_T % 2147483629 == 721 &&
LARGE_OFF_T % 2147483647 == 1);
#undef LARGE_OFF_T
return munmap(addr, length);
}
#endif
#ifdef __cplusplus
}
#endif
#endif /* _OS_MMAN_H_ */
|
