FFmpeg/libavutil/attributes.h
Michael Niedermayer 2fd41c9067 Merge remote-tracking branch 'newdev/master'
* newdev/master:
  avio: make udp_set_remote_url/get_local_port internal.
  asfdec: also subtract preroll when reading simple index object
  matroskaenc: remove a variable that's unused after bc17bd9.
  avio: cosmetics - nicer vertical alignment.
  Remove unnecessary icc version checks
  Disable 'attribute "foo" ignored' warnings from icc
  rtsp: Don't use a locale dependent format string
  Add xd55 codec tag for XDCAM HD422 720p25 CBR files.
  configure: get libavcodec version from new version.h header
  lavc: move the version macros to a new installed header.
  matroskaenc: simplify get_aac_sample_rates by using ff_mpeg4audio_get_config
  Do not use format string "%0.3f" for RTSP Range field.
  Add apply_window_int16() to DSPContext with x86-optimized versions and use it in the ac3_fixed encoder.
  Document usage of import libraries created by dlltool
  configure: Set the correct lib target for arm/wince dlltool
  fate: simplify regression-funcs.sh
  fate: add support for multithread testing

Conflicts:
	libavformat/rtspdec.c
	libavutil/attributes.h
	libavutil/internal.h
	libavutil/mem.h

Merged-by: Michael Niedermayer <michaelni@gmx.at>
2011-03-24 02:16:11 +01:00

135 lines
3.0 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
#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
#else
# define av_builtin_constant_p(x) 0
#endif
#endif /* AVUTIL_ATTRIBUTES_H */