/*
  * 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

 #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(3,1)
 #    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)
 #    define av_pure __attribute__((pure))
 #else
 #    define av_pure
 #endif
 
 #if AV_GCC_VERSION_AT_LEAST(2,6)
 #    define av_const __attribute__((const))
 #else
 #    define av_const
 #endif
 

 #if AV_GCC_VERSION_AT_LEAST(4,3)

 #    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__)
 #    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)
 #    define av_used __attribute__((used))
 #else
 #    define av_used
 #endif
 

 #if AV_GCC_VERSION_AT_LEAST(3,3)

 #   define av_alias __attribute__((may_alias))
 #else
 #   define av_alias
 #endif
 

 #if defined(__GNUC__) && !defined(__INTEL_COMPILER) && !defined(__clang__)

 #    define av_uninit(x) x=x
 #else
 #    define av_uninit(x) x
 #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
 

 #if AV_GCC_VERSION_AT_LEAST(2,5)
 #    define av_noreturn __attribute__((noreturn))
 #else
 #    define av_noreturn
 #endif
 

 #endif /* AVUTIL_ATTRIBUTES_H */