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 ALIAS(name)	__attribute__((alias (#name)))
40# if (__GNUC__ > 3) || (__GNUC__ == 3 && __GNUC_MINOR__ > 2)
41#  define ALWAYS_INLINE	inline __attribute__((always_inline))
42#  define HIDDEN	__attribute__((visibility ("hidden")))
43#  define PROTECTED	__attribute__((visibility ("protected")))
44# else
45#  define ALWAYS_INLINE
46#  define HIDDEN
47#  define PROTECTED
48# endif
49# define WEAK		__attribute__((weak))
50# if (__GNUC__ >= 3)
51#  define likely(x)	__builtin_expect ((x), 1)
52#  define unlikely(x)	__builtin_expect ((x), 0)
53# else
54#  define likely(x)	(x)
55#  define unlikely(x)	(x)
56# endif
57#else
58# define ALIGNED(x)
59# define ALWAYS_INLINE
60# define CONST_ATTR
61# define UNUSED
62# define NOINLINE
63# define NORETURN
64# define ALIAS(name)
65# define HIDDEN
66# define PROTECTED
67# define WEAK
68# define likely(x)	(x)
69# define unlikely(x)	(x)
70#endif
71
72#define ARRAY_SIZE(a)	(sizeof (a) / sizeof ((a)[0]))
73
74#endif /* COMPILER_H */
75