mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
155 lines
3.6 KiB
C
155 lines
3.6 KiB
C
/*
|
|
* 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)
|
|
#else
|
|
# define AV_GCC_VERSION_AT_LEAST(x,y) 0
|
|
#endif
|
|
|
|
#ifndef av_always_inline
|
|
#if AV_GCC_VERSION_AT_LEAST(3,1)
|
|
# define av_always_inline __attribute__((always_inline)) inline
|
|
#else
|
|
# define av_always_inline inline
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef av_noinline
|
|
#if AV_GCC_VERSION_AT_LEAST(3,1)
|
|
# define av_noinline __attribute__((noinline))
|
|
#else
|
|
# define av_noinline
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef av_pure
|
|
#if AV_GCC_VERSION_AT_LEAST(3,1)
|
|
# define av_pure __attribute__((pure))
|
|
#else
|
|
# define av_pure
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef av_const
|
|
#if AV_GCC_VERSION_AT_LEAST(2,6)
|
|
# define av_const __attribute__((const))
|
|
#else
|
|
# define av_const
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef av_cold
|
|
#if AV_GCC_VERSION_AT_LEAST(4,3)
|
|
# define av_cold __attribute__((cold))
|
|
#else
|
|
# define av_cold
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef av_flatten
|
|
#if AV_GCC_VERSION_AT_LEAST(4,1)
|
|
# define av_flatten __attribute__((flatten))
|
|
#else
|
|
# define av_flatten
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef attribute_deprecated
|
|
#if AV_GCC_VERSION_AT_LEAST(3,1)
|
|
# define attribute_deprecated __attribute__((deprecated))
|
|
#else
|
|
# define attribute_deprecated
|
|
#endif
|
|
#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")
|
|
#else
|
|
# define AV_NOWARN_DEPRECATED(code) code
|
|
#endif
|
|
#endif
|
|
|
|
|
|
#ifndef av_unused
|
|
#if defined(__GNUC__)
|
|
# define av_unused __attribute__((unused))
|
|
#else
|
|
# define av_unused
|
|
#endif
|
|
#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.
|
|
*/
|
|
#ifndef av_used
|
|
#if AV_GCC_VERSION_AT_LEAST(3,1)
|
|
# define av_used __attribute__((used))
|
|
#else
|
|
# define av_used
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef av_alias
|
|
#if AV_GCC_VERSION_AT_LEAST(3,3)
|
|
# define av_alias __attribute__((may_alias))
|
|
#else
|
|
# define av_alias
|
|
#endif
|
|
#endif
|
|
|
|
#ifndef av_uninit
|
|
#if defined(__GNUC__) && !defined(__INTEL_COMPILER)
|
|
# define av_uninit(x) x=x
|
|
#else
|
|
# define av_uninit(x) x
|
|
#endif
|
|
#endif
|
|
|
|
#ifdef __GNUC__
|
|
# 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
|
|
|
|
#endif /* AVUTIL_ATTRIBUTES_H */
|