Commit | Line | Data |
---|---|---|
2ba45a60 DM |
1 | /* |
2 | * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
7 | * modify it under the terms of the GNU Lesser General Public | |
8 | * License as published by the Free Software Foundation; either | |
9 | * version 2.1 of the License, or (at your option) any later version. | |
10 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 | * Lesser General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU Lesser General Public | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | /** | |
22 | * @file | |
23 | * Macro definitions for various function/variable attributes | |
24 | */ | |
25 | ||
26 | #ifndef AVUTIL_ATTRIBUTES_H | |
27 | #define AVUTIL_ATTRIBUTES_H | |
28 | ||
29 | #ifdef __GNUC__ | |
30 | # define AV_GCC_VERSION_AT_LEAST(x,y) (__GNUC__ > x || __GNUC__ == x && __GNUC_MINOR__ >= y) | |
31 | #else | |
32 | # define AV_GCC_VERSION_AT_LEAST(x,y) 0 | |
33 | #endif | |
34 | ||
35 | #ifndef av_always_inline | |
36 | #if AV_GCC_VERSION_AT_LEAST(3,1) | |
37 | # define av_always_inline __attribute__((always_inline)) inline | |
38 | #elif defined(_MSC_VER) | |
39 | # define av_always_inline __forceinline | |
40 | #else | |
41 | # define av_always_inline inline | |
42 | #endif | |
43 | #endif | |
44 | ||
45 | #ifndef av_extern_inline | |
46 | #if defined(__ICL) && __ICL >= 1210 || defined(__GNUC_STDC_INLINE__) | |
47 | # define av_extern_inline extern inline | |
48 | #else | |
49 | # define av_extern_inline inline | |
50 | #endif | |
51 | #endif | |
52 | ||
53 | #if AV_GCC_VERSION_AT_LEAST(3,1) | |
54 | # define av_noinline __attribute__((noinline)) | |
55 | #elif defined(_MSC_VER) | |
56 | # define av_noinline __declspec(noinline) | |
57 | #else | |
58 | # define av_noinline | |
59 | #endif | |
60 | ||
61 | #if AV_GCC_VERSION_AT_LEAST(3,1) | |
62 | # define av_pure __attribute__((pure)) | |
63 | #else | |
64 | # define av_pure | |
65 | #endif | |
66 | ||
67 | #if AV_GCC_VERSION_AT_LEAST(2,6) | |
68 | # define av_const __attribute__((const)) | |
69 | #else | |
70 | # define av_const | |
71 | #endif | |
72 | ||
73 | #if AV_GCC_VERSION_AT_LEAST(4,3) | |
74 | # define av_cold __attribute__((cold)) | |
75 | #else | |
76 | # define av_cold | |
77 | #endif | |
78 | ||
79 | #if AV_GCC_VERSION_AT_LEAST(4,1) && !defined(__llvm__) | |
80 | # define av_flatten __attribute__((flatten)) | |
81 | #else | |
82 | # define av_flatten | |
83 | #endif | |
84 | ||
85 | #if AV_GCC_VERSION_AT_LEAST(3,1) | |
86 | # define attribute_deprecated __attribute__((deprecated)) | |
87 | #elif defined(_MSC_VER) | |
88 | # define attribute_deprecated __declspec(deprecated) | |
89 | #else | |
90 | # define attribute_deprecated | |
91 | #endif | |
92 | ||
93 | /** | |
94 | * Disable warnings about deprecated features | |
95 | * This is useful for sections of code kept for backward compatibility and | |
96 | * scheduled for removal. | |
97 | */ | |
98 | #ifndef AV_NOWARN_DEPRECATED | |
99 | #if AV_GCC_VERSION_AT_LEAST(4,6) | |
100 | # define AV_NOWARN_DEPRECATED(code) \ | |
101 | _Pragma("GCC diagnostic push") \ | |
102 | _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") \ | |
103 | code \ | |
104 | _Pragma("GCC diagnostic pop") | |
105 | #elif defined(_MSC_VER) | |
106 | # define AV_NOWARN_DEPRECATED(code) \ | |
107 | __pragma(warning(push)) \ | |
108 | __pragma(warning(disable : 4996)) \ | |
109 | code; \ | |
110 | __pragma(warning(pop)) | |
111 | #else | |
112 | # define AV_NOWARN_DEPRECATED(code) code | |
113 | #endif | |
114 | #endif | |
115 | ||
116 | ||
117 | #if defined(__GNUC__) | |
118 | # define av_unused __attribute__((unused)) | |
119 | #else | |
120 | # define av_unused | |
121 | #endif | |
122 | ||
123 | /** | |
124 | * Mark a variable as used and prevent the compiler from optimizing it | |
125 | * away. This is useful for variables accessed only from inline | |
126 | * assembler without the compiler being aware. | |
127 | */ | |
128 | #if AV_GCC_VERSION_AT_LEAST(3,1) | |
129 | # define av_used __attribute__((used)) | |
130 | #else | |
131 | # define av_used | |
132 | #endif | |
133 | ||
134 | #if AV_GCC_VERSION_AT_LEAST(3,3) | |
135 | # define av_alias __attribute__((may_alias)) | |
136 | #else | |
137 | # define av_alias | |
138 | #endif | |
139 | ||
140 | #if defined(__GNUC__) && !defined(__INTEL_COMPILER) && !defined(__clang__) | |
141 | # define av_uninit(x) x=x | |
142 | #else | |
143 | # define av_uninit(x) x | |
144 | #endif | |
145 | ||
146 | #ifdef __GNUC__ | |
147 | # define av_builtin_constant_p __builtin_constant_p | |
148 | # define av_printf_format(fmtpos, attrpos) __attribute__((__format__(__printf__, fmtpos, attrpos))) | |
149 | #else | |
150 | # define av_builtin_constant_p(x) 0 | |
151 | # define av_printf_format(fmtpos, attrpos) | |
152 | #endif | |
153 | ||
154 | #if AV_GCC_VERSION_AT_LEAST(2,5) | |
155 | # define av_noreturn __attribute__((noreturn)) | |
156 | #else | |
157 | # define av_noreturn | |
158 | #endif | |
159 | ||
160 | #endif /* AVUTIL_ATTRIBUTES_H */ |