New file |
| | |
| | | /* |
| | | * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at> |
| | | * |
| | | * This file is part of FFmpeg. |
| | | * |
| | | * FFmpeg is free software; you can redistribute it and/or |
| | | * modify it under the terms of the GNU Lesser General Public |
| | | * License as published by the Free Software Foundation; either |
| | | * version 2.1 of the License, or (at your option) any later version. |
| | | * |
| | | * FFmpeg is distributed in the hope that it will be useful, |
| | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| | | * Lesser General Public License for more details. |
| | | * |
| | | * You should have received a copy of the GNU Lesser General Public |
| | | * License along with FFmpeg; if not, write to the Free Software |
| | | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| | | */ |
| | | |
| | | /** |
| | | * @file |
| | | * Macro definitions for various function/variable attributes |
| | | */ |
| | | |
| | | #ifndef AVUTIL_ATTRIBUTES_H |
| | | #define AVUTIL_ATTRIBUTES_H |
| | | |
| | | #ifdef __GNUC__ |
| | | # define AV_GCC_VERSION_AT_LEAST(x,y) (__GNUC__ > (x) || __GNUC__ == (x) && __GNUC_MINOR__ >= (y)) |
| | | # define AV_GCC_VERSION_AT_MOST(x,y) (__GNUC__ < (x) || __GNUC__ == (x) && __GNUC_MINOR__ <= (y)) |
| | | #else |
| | | # define AV_GCC_VERSION_AT_LEAST(x,y) 0 |
| | | # define AV_GCC_VERSION_AT_MOST(x,y) 0 |
| | | #endif |
| | | |
| | | #ifndef av_always_inline |
| | | #if AV_GCC_VERSION_AT_LEAST(3,1) |
| | | # define av_always_inline __attribute__((always_inline)) inline |
| | | #elif defined(_MSC_VER) |
| | | # define av_always_inline __forceinline |
| | | #else |
| | | # define av_always_inline inline |
| | | #endif |
| | | #endif |
| | | |
| | | #ifndef av_extern_inline |
| | | #if defined(__ICL) && __ICL >= 1210 || defined(__GNUC_STDC_INLINE__) |
| | | # define av_extern_inline extern inline |
| | | #else |
| | | # define av_extern_inline inline |
| | | #endif |
| | | #endif |
| | | |
| | | #if AV_GCC_VERSION_AT_LEAST(3,4) |
| | | # define av_warn_unused_result __attribute__((warn_unused_result)) |
| | | #else |
| | | # define av_warn_unused_result |
| | | #endif |
| | | |
| | | #if AV_GCC_VERSION_AT_LEAST(3,1) |
| | | # define av_noinline __attribute__((noinline)) |
| | | #elif defined(_MSC_VER) |
| | | # define av_noinline __declspec(noinline) |
| | | #else |
| | | # define av_noinline |
| | | #endif |
| | | |
| | | #if AV_GCC_VERSION_AT_LEAST(3,1) || defined(__clang__) |
| | | # define av_pure __attribute__((pure)) |
| | | #else |
| | | # define av_pure |
| | | #endif |
| | | |
| | | #if AV_GCC_VERSION_AT_LEAST(2,6) || defined(__clang__) |
| | | # define av_const __attribute__((const)) |
| | | #else |
| | | # define av_const |
| | | #endif |
| | | |
| | | #if AV_GCC_VERSION_AT_LEAST(4,3) || defined(__clang__) |
| | | # define av_cold __attribute__((cold)) |
| | | #else |
| | | # define av_cold |
| | | #endif |
| | | |
| | | #if AV_GCC_VERSION_AT_LEAST(4,1) && !defined(__llvm__) |
| | | # define av_flatten __attribute__((flatten)) |
| | | #else |
| | | # define av_flatten |
| | | #endif |
| | | |
| | | #if AV_GCC_VERSION_AT_LEAST(3,1) |
| | | # define attribute_deprecated __attribute__((deprecated)) |
| | | #elif defined(_MSC_VER) |
| | | # define attribute_deprecated __declspec(deprecated) |
| | | #else |
| | | # define attribute_deprecated |
| | | #endif |
| | | |
| | | /** |
| | | * Disable warnings about deprecated features |
| | | * This is useful for sections of code kept for backward compatibility and |
| | | * scheduled for removal. |
| | | */ |
| | | #ifndef AV_NOWARN_DEPRECATED |
| | | #if AV_GCC_VERSION_AT_LEAST(4,6) |
| | | # define AV_NOWARN_DEPRECATED(code) \ |
| | | _Pragma("GCC diagnostic push") \ |
| | | _Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") \ |
| | | code \ |
| | | _Pragma("GCC diagnostic pop") |
| | | #elif defined(_MSC_VER) |
| | | # define AV_NOWARN_DEPRECATED(code) \ |
| | | __pragma(warning(push)) \ |
| | | __pragma(warning(disable : 4996)) \ |
| | | code; \ |
| | | __pragma(warning(pop)) |
| | | #else |
| | | # define AV_NOWARN_DEPRECATED(code) code |
| | | #endif |
| | | #endif |
| | | |
| | | #if defined(__GNUC__) || defined(__clang__) |
| | | # define av_unused __attribute__((unused)) |
| | | #else |
| | | # define av_unused |
| | | #endif |
| | | |
| | | /** |
| | | * Mark a variable as used and prevent the compiler from optimizing it |
| | | * away. This is useful for variables accessed only from inline |
| | | * assembler without the compiler being aware. |
| | | */ |
| | | #if AV_GCC_VERSION_AT_LEAST(3,1) || defined(__clang__) |
| | | # define av_used __attribute__((used)) |
| | | #else |
| | | # define av_used |
| | | #endif |
| | | |
| | | #if AV_GCC_VERSION_AT_LEAST(3,3) || defined(__clang__) |
| | | # define av_alias __attribute__((may_alias)) |
| | | #else |
| | | # define av_alias |
| | | #endif |
| | | |
| | | #if (defined(__GNUC__) || defined(__clang__)) && !defined(__INTEL_COMPILER) |
| | | # define av_uninit(x) x=x |
| | | #else |
| | | # define av_uninit(x) x |
| | | #endif |
| | | |
| | | #if defined(__GNUC__) || defined(__clang__) |
| | | # define av_builtin_constant_p __builtin_constant_p |
| | | # define av_printf_format(fmtpos, attrpos) __attribute__((__format__(__printf__, fmtpos, attrpos))) |
| | | #else |
| | | # define av_builtin_constant_p(x) 0 |
| | | # define av_printf_format(fmtpos, attrpos) |
| | | #endif |
| | | |
| | | #if AV_GCC_VERSION_AT_LEAST(2,5) || defined(__clang__) |
| | | # define av_noreturn __attribute__((noreturn)) |
| | | #else |
| | | # define av_noreturn |
| | | #endif |
| | | |
| | | #endif /* AVUTIL_ATTRIBUTES_H */ |