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authorEmil Velikov2015-04-05 09:51:59 -0500
committerEmil Velikov2015-04-28 05:19:15 -0500
commit42465feb9759ef5a6d79d7e628510cd0a081f913 (patch)
tree723eef6fd35213dd1766df5ac6eaa2e1e7a73042 /libdrm_macros.h
parenta814f933bf9fb25cf7b3cf82c69ba07ed2a686d0 (diff)
downloadexternal-libgbm-42465feb9759ef5a6d79d7e628510cd0a081f913.tar.gz
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drm: rename libdrm{,_macros}.h
Provide a more meaningful name, considering what it does. Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Diffstat (limited to 'libdrm_macros.h')
-rw-r--r--libdrm_macros.h89
1 files changed, 89 insertions, 0 deletions
diff --git a/libdrm_macros.h b/libdrm_macros.h
new file mode 100644
index 00000000..6c3cd594
--- /dev/null
+++ b/libdrm_macros.h
@@ -0,0 +1,89 @@
1/*
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
34
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) && !defined(__LP64__)
49#include <errno.h> /* for EINVAL */
50
51extern void *__mmap2(void *, size_t, int, int, int, size_t);
52
53static inline void *drm_mmap(void *addr, size_t length, int prot, int flags,
54 int fd, loff_t offset)
55{
56 /* offset must be aligned to 4096 (not necessarily the page size) */
57 if (offset & 4095) {
58 errno = EINVAL;
59 return MAP_FAILED;
60 }
61
62 return __mmap2(addr, length, prot, flags, fd, (size_t) (offset >> 12));
63}
64
65# define drm_munmap(addr, length) \
66 munmap(addr, length)
67
68
69#else
70
71/* assume large file support exists */
72# define drm_mmap(addr, length, prot, flags, fd, offset) \
73 mmap(addr, length, prot, flags, fd, offset)
74
75
76static inline int drm_munmap(void *addr, size_t length)
77{
78 /* Copied from configure code generated by AC_SYS_LARGEFILE */
79#define LARGE_OFF_T ((((off_t) 1 << 31) << 31) - 1 + \
80 (((off_t) 1 << 31) << 31))
81 STATIC_ASSERT(LARGE_OFF_T % 2147483629 == 721 &&
82 LARGE_OFF_T % 2147483647 == 1);
83#undef LARGE_OFF_T
84
85 return munmap(addr, length);
86}
87#endif
88
89#endif