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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 4349 | Serge | 1 | /* |
| 2 | * copyright (c) 2006 Michael Niedermayer |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | /** |
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| 22 | * @file |
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| 23 | * Macro definitions for various function/variable attributes |
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| 24 | */ |
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| 25 | |||
| 26 | #ifndef AVUTIL_ATTRIBUTES_H |
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| 27 | #define AVUTIL_ATTRIBUTES_H |
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| 28 | |||
| 29 | #ifdef __GNUC__ |
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| 30 | # define AV_GCC_VERSION_AT_LEAST(x,y) (__GNUC__ > x || __GNUC__ == x && __GNUC_MINOR__ >= y) |
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| 31 | #else |
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| 32 | # define AV_GCC_VERSION_AT_LEAST(x,y) 0 |
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| 33 | #endif |
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| 34 | |||
| 35 | #ifndef av_always_inline |
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| 36 | #if AV_GCC_VERSION_AT_LEAST(3,1) |
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| 37 | # define av_always_inline __attribute__((always_inline)) inline |
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| 38 | #elif defined(_MSC_VER) |
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| 39 | # define av_always_inline __forceinline |
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| 40 | #else |
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| 41 | # define av_always_inline inline |
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| 42 | #endif |
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| 43 | #endif |
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| 44 | |||
| 45 | #ifndef av_extern_inline |
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| 46 | #if defined(__ICL) && __ICL >= 1210 || defined(__GNUC_STDC_INLINE__) |
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| 47 | # define av_extern_inline extern inline |
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| 48 | #else |
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| 49 | # define av_extern_inline inline |
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| 50 | #endif |
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| 51 | #endif |
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| 52 | |||
| 53 | #if AV_GCC_VERSION_AT_LEAST(3,1) |
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| 54 | # define av_noinline __attribute__((noinline)) |
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| 55 | #elif defined(_MSC_VER) |
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| 56 | # define av_noinline __declspec(noinline) |
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| 57 | #else |
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| 58 | # define av_noinline |
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| 59 | #endif |
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| 60 | |||
| 61 | #if AV_GCC_VERSION_AT_LEAST(3,1) |
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| 62 | # define av_pure __attribute__((pure)) |
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| 63 | #else |
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| 64 | # define av_pure |
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| 65 | #endif |
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| 66 | |||
| 67 | #if AV_GCC_VERSION_AT_LEAST(2,6) |
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| 68 | # define av_const __attribute__((const)) |
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| 69 | #else |
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| 70 | # define av_const |
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| 71 | #endif |
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| 72 | |||
| 73 | #if AV_GCC_VERSION_AT_LEAST(4,3) |
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| 74 | # define av_cold __attribute__((cold)) |
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| 75 | #else |
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| 76 | # define av_cold |
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| 77 | #endif |
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| 78 | |||
| 79 | #if AV_GCC_VERSION_AT_LEAST(4,1) |
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| 80 | # define av_flatten __attribute__((flatten)) |
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| 81 | #else |
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| 82 | # define av_flatten |
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| 83 | #endif |
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| 84 | |||
| 85 | #if AV_GCC_VERSION_AT_LEAST(3,1) |
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| 86 | # define attribute_deprecated __attribute__((deprecated)) |
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| 87 | #elif defined(_MSC_VER) |
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| 88 | # define attribute_deprecated __declspec(deprecated) |
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| 89 | #else |
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| 90 | # define attribute_deprecated |
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| 91 | #endif |
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| 92 | |||
| 93 | /** |
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| 94 | * Disable warnings about deprecated features |
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| 95 | * This is useful for sections of code kept for backward compatibility and |
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| 96 | * scheduled for removal. |
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| 97 | */ |
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| 98 | #ifndef AV_NOWARN_DEPRECATED |
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| 99 | #if AV_GCC_VERSION_AT_LEAST(4,6) |
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| 100 | # define AV_NOWARN_DEPRECATED(code) \ |
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| 101 | _Pragma("GCC diagnostic push") \ |
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| 102 | _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") \ |
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| 103 | code \ |
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| 104 | _Pragma("GCC diagnostic pop") |
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| 105 | #elif defined(_MSC_VER) |
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| 106 | # define AV_NOWARN_DEPRECATED(code) \ |
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| 107 | __pragma(warning(push)) \ |
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| 108 | __pragma(warning(disable : 4996)) \ |
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| 109 | code; \ |
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| 110 | __pragma(warning(pop)) |
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| 111 | #else |
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| 112 | # define AV_NOWARN_DEPRECATED(code) code |
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| 113 | #endif |
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| 114 | #endif |
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| 115 | |||
| 116 | |||
| 117 | #if defined(__GNUC__) |
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| 118 | # define av_unused __attribute__((unused)) |
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| 119 | #else |
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| 120 | # define av_unused |
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| 121 | #endif |
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| 122 | |||
| 123 | /** |
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| 124 | * Mark a variable as used and prevent the compiler from optimizing it |
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| 125 | * away. This is useful for variables accessed only from inline |
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| 126 | * assembler without the compiler being aware. |
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| 127 | */ |
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| 128 | #if AV_GCC_VERSION_AT_LEAST(3,1) |
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| 129 | # define av_used __attribute__((used)) |
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| 130 | #else |
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| 131 | # define av_used |
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| 132 | #endif |
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| 133 | |||
| 134 | #if AV_GCC_VERSION_AT_LEAST(3,3) |
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| 135 | # define av_alias __attribute__((may_alias)) |
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| 136 | #else |
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| 137 | # define av_alias |
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| 138 | #endif |
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| 139 | |||
| 140 | #if defined(__GNUC__) && !defined(__INTEL_COMPILER) && !defined(__clang__) |
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| 141 | # define av_uninit(x) x=x |
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| 142 | #else |
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| 143 | # define av_uninit(x) x |
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| 144 | #endif |
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| 145 | |||
| 146 | #ifdef __GNUC__ |
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| 147 | # define av_builtin_constant_p __builtin_constant_p |
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| 148 | # define av_printf_format(fmtpos, attrpos) __attribute__((__format__(__printf__, fmtpos, attrpos))) |
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| 149 | #else |
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| 150 | # define av_builtin_constant_p(x) 0 |
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| 151 | # define av_printf_format(fmtpos, attrpos) |
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| 152 | #endif |
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| 153 | |||
| 154 | #if AV_GCC_VERSION_AT_LEAST(2,5) |
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| 155 | # define av_noreturn __attribute__((noreturn)) |
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| 156 | #else |
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| 157 | # define av_noreturn |
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| 158 | #endif |
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| 159 | |||
| 160 | #endif /* AVUTIL_ATTRIBUTES_H */ |