1/* libunwind - a platform-independent unwind library
2 Copyright (C) 2001-2005 Hewlett-Packard Co
3 Copyright (C) 2007 David Mosberger-Tang
4 Contributed by David Mosberger-Tang <dmosberger@gmail.com>
5
6This file is part of libunwind.
7
8Permission is hereby granted, free of charge, to any person obtaining
9a copy of this software and associated documentation files (the
10"Software"), to deal in the Software without restriction, including
11without limitation the rights to use, copy, modify, merge, publish,
12distribute, sublicense, and/or sell copies of the Software, and to
13permit persons to whom the Software is furnished to do so, subject to
14the following conditions:
15
16The above copyright notice and this permission notice shall be
17included in all copies or substantial portions of the Software.
18
19THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
20EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
21MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
22NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
23LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
24OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
25WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
26
27/* Compiler specific useful bits that are used in libunwind, and also in the
28 * tests. */
29
30#ifndef COMPILER_H
31#define COMPILER_H
32
33#ifdef __GNUC__
34# define ALIGNED(x) __attribute__((aligned(x)))
35# define CONST_ATTR __attribute__((__const__))
36# define UNUSED __attribute__((unused))
37# define NOINLINE __attribute__((noinline))
38# define NORETURN __attribute__((noreturn))
39# define ALIAS2(name) #name
40# define ALIAS(name) __attribute__((alias (ALIAS2(name))))
41# if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
42# define ALWAYS_INLINE inline __attribute__((always_inline))
43# define HIDDEN __attribute__((visibility ("hidden")))
44# else
45# define ALWAYS_INLINE
46# define HIDDEN
47# endif
48# define WEAK __attribute__((weak))
49# if (__GNUC__ >= 3)
50# define likely(x) __builtin_expect ((x), 1)
51# define unlikely(x) __builtin_expect ((x), 0)
52# else
53# define likely(x) (x)
54# define unlikely(x) (x)
55# endif
56#else
57# define ALIGNED(x)
58# define ALWAYS_INLINE
59# define CONST_ATTR
60# define UNUSED
61# define NOINLINE
62# define NORETURN
63# define ALIAS(name)
64# define HIDDEN
65# define WEAK
66# define likely(x) (x)
67# define unlikely(x) (x)
68#endif
69
70#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
71
72#endif /* COMPILER_H */
73