blob: f982c844b351bf4f57c3643f76f58c717228cf79 [file] [log] [blame]
Thierry Reding5d835792014-02-19 15:56:50 +01001/*
2 * Copyright © 2014 NVIDIA Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 */
22
23#ifndef LIBDRM_LIBDRM_H
24#define LIBDRM_LIBDRM_H
25
26#if defined(HAVE_VISIBILITY)
27# define drm_private __attribute__((visibility("hidden")))
28# define drm_public __attribute__((visibility("default")))
29#else
30# define drm_private
31# define drm_public
32#endif
33
Emil Velikov4c2766b2014-09-07 19:29:00 +010034
35/**
36 * Static (compile-time) assertion.
37 * Basically, use COND to dimension an array. If COND is false/zero the
38 * array size will be -1 and we'll get a compilation error.
39 */
40#define STATIC_ASSERT(COND) \
41 do { \
42 (void) sizeof(char [1 - 2*!(COND)]); \
43 } while (0)
44
45
46#include <sys/mman.h>
47
48#if defined(ANDROID)
49#include <errno.h> /* for EINVAL */
50
Emil Velikov4c2766b2014-09-07 19:29:00 +010051static inline void *drm_mmap(void *addr, size_t length, int prot, int flags,
52 int fd, loff_t offset)
53{
54 /* offset must be aligned to 4096 (not necessarily the page size) */
55 if (offset & 4095) {
56 errno = EINVAL;
57 return MAP_FAILED;
58 }
59
Stéphane Marchesin3b1223f2015-05-11 16:56:17 -070060 return mmap64(addr, length, prot, flags, fd, offset);
Emil Velikov4c2766b2014-09-07 19:29:00 +010061}
62
63# define drm_munmap(addr, length) \
64 munmap(addr, length)
65
66
67#else
68
69/* assume large file support exists */
70# define drm_mmap(addr, length, prot, flags, fd, offset) \
71 mmap(addr, length, prot, flags, fd, offset)
72
73
74static inline int drm_munmap(void *addr, size_t length)
75{
76 /* Copied from configure code generated by AC_SYS_LARGEFILE */
77#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + \
78 (((off_t) 1 << 31) << 31))
79 STATIC_ASSERT(LARGE_OFF_T % 2147483629 == 721 &&
80 LARGE_OFF_T % 2147483647 == 1);
81#undef LARGE_OFF_T
82
83 return munmap(addr, length);
84}
85#endif
86
Thierry Reding5d835792014-02-19 15:56:50 +010087#endif