Revision 0374152f

View differences:

libavutil/attributes.h
96 96 
#endif
97 97 
#endif
98 98 

  		




  
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/**


  		




  
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 * Mark a variable as used and prevent the compiler from optimizing it


  		




  
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 * away.  This is useful for variables accessed only from inline


  		




  
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 * assembler without the compiler being aware.


  		




  
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 */


  		




  
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#ifndef av_used


  		




  
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#if AV_GCC_VERSION_AT_LEAST(3,1)


  		




  
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#    define av_used __attribute__((used))


  		




  
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#else


  		




  
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#    define av_used


  		




  
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#endif


  		




  
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#endif


  		




  
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#ifndef av_alias


  		




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#if (!defined(__ICC) || __ICC > 1200) && AV_GCC_VERSION_AT_LEAST(3,3)


  		




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#   define av_alias __attribute__((may_alias))


  		












  

    
      libavutil/internal.h
    
  





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#endif


  		




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#endif


  		




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/**


  		




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 * Mark a variable as used and prevent the compiler from optimizing it away.


  		




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 * This is useful for asm that accesses varibles in ways that the compiler does not


  		




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 * understand


  		




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 */


  		




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#ifndef attribute_used


  		




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#if AV_GCC_VERSION_AT_LEAST(3,1)


  		




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#    define attribute_used __attribute__((used))


  		




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#else


  		




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#    define attribute_used


  		




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#endif


  		




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#endif


  		




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#ifndef INT16_MIN


  		




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#define INT16_MIN       (-0x7fff - 1)


  		




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#endif


  		












  

    
      libavutil/mem.h
    
  





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        static const t __attribute__((aligned(n))) v


  		




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#elif defined(__GNUC__)


  		




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    #define DECLARE_ALIGNED(n,t,v)      t __attribute__ ((aligned (n))) v


  		




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    #define DECLARE_ASM_CONST(n,t,v)    static const t attribute_used __attribute__ ((aligned (n))) v


  		




  
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    #define DECLARE_ASM_CONST(n,t,v)    static const t av_used __attribute__ ((aligned (n))) v


  		




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#elif defined(_MSC_VER)


  		




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    #define DECLARE_ALIGNED(n,t,v)      __declspec(align(n)) t v


  		




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    #define DECLARE_ASM_CONST(n,t,v)    __declspec(align(n)) static const t v


  		












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