FFmpeg  4.3.1
Macros
attributes.h File Reference

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Macros

#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))
 
#define AV_HAS_BUILTIN(x)   0
 
#define av_always_inline   __attribute__((always_inline)) inline
 
#define av_extern_inline   inline
 
#define av_warn_unused_result   __attribute__((warn_unused_result))
 
#define av_noinline   __attribute__((noinline))
 
#define av_pure   __attribute__((pure))
 
#define av_const   __attribute__((const))
 
#define av_cold   __attribute__((cold))
 
#define av_flatten   __attribute__((flatten))
 
#define attribute_deprecated   __attribute__((deprecated))
 
#define AV_NOWARN_DEPRECATED(code)
 Disable warnings about deprecated features This is useful for sections of code kept for backward compatibility and scheduled for removal. More...
 
#define av_unused   __attribute__((unused))
 
#define av_used   __attribute__((used))
 Mark a variable as used and prevent the compiler from optimizing it away. More...
 
#define av_alias   __attribute__((may_alias))
 
#define av_uninit(x)   x=x
 
#define av_builtin_constant_p   __builtin_constant_p
 
#define av_printf_format(fmtpos, attrpos)   __attribute__((__format__(__printf__, fmtpos, attrpos)))
 
#define av_noreturn   __attribute__((noreturn))
 

Detailed Description

Macro definitions for various function/variable attributes

Definition in file attributes.h.

Macro Definition Documentation

◆ AV_GCC_VERSION_AT_LEAST

#define AV_GCC_VERSION_AT_LEAST (   x,
 
)    (__GNUC__ > (x) || __GNUC__ == (x) && __GNUC_MINOR__ >= (y))

Definition at line 31 of file attributes.h.

◆ AV_GCC_VERSION_AT_MOST

#define AV_GCC_VERSION_AT_MOST (   x,
 
)    (__GNUC__ < (x) || __GNUC__ == (x) && __GNUC_MINOR__ <= (y))

Definition at line 32 of file attributes.h.

◆ AV_HAS_BUILTIN

#define AV_HAS_BUILTIN (   x)    0

Definition at line 41 of file attributes.h.

◆ av_always_inline

#define av_always_inline   __attribute__((always_inline)) inline

Definition at line 46 of file attributes.h.

◆ av_extern_inline

#define av_extern_inline   inline

Definition at line 58 of file attributes.h.

◆ av_warn_unused_result

#define av_warn_unused_result   __attribute__((warn_unused_result))

Definition at line 63 of file attributes.h.

◆ av_noinline

#define av_noinline   __attribute__((noinline))

Definition at line 69 of file attributes.h.

◆ av_pure

#define av_pure   __attribute__((pure))

Definition at line 77 of file attributes.h.

◆ av_const

#define av_const   __attribute__((const))

Definition at line 83 of file attributes.h.

◆ av_cold

#define av_cold   __attribute__((cold))

Definition at line 89 of file attributes.h.

◆ av_flatten

#define av_flatten   __attribute__((flatten))

Definition at line 95 of file attributes.h.

◆ attribute_deprecated

#define attribute_deprecated   __attribute__((deprecated))

Definition at line 101 of file attributes.h.

◆ AV_NOWARN_DEPRECATED

#define AV_NOWARN_DEPRECATED (   code)
Value:
_Pragma("GCC diagnostic push") \
_Pragma("GCC diagnostic ignored \"-Wdeprecated-declarations\"") \
code \
_Pragma("GCC diagnostic pop")

Disable warnings about deprecated features This is useful for sections of code kept for backward compatibility and scheduled for removal.

Definition at line 115 of file attributes.h.

◆ av_unused

#define av_unused   __attribute__((unused))

Definition at line 132 of file attributes.h.

◆ av_used

#define av_used   __attribute__((used))

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.

Definition at line 143 of file attributes.h.

◆ av_alias

union unaligned_16 av_alias   __attribute__((may_alias))

Definition at line 149 of file attributes.h.

◆ av_uninit

#define av_uninit (   x)    x=x

Definition at line 155 of file attributes.h.

◆ av_builtin_constant_p

#define av_builtin_constant_p   __builtin_constant_p

Definition at line 161 of file attributes.h.

◆ av_printf_format

#define av_printf_format (   fmtpos,
  attrpos 
)    __attribute__((__format__(__printf__, fmtpos, attrpos)))

Definition at line 162 of file attributes.h.

◆ av_noreturn

#define av_noreturn   __attribute__((noreturn))

Definition at line 169 of file attributes.h.