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Rename attribute_used to av_used and move it to attributes.h

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This is consistent with most of the other attribute macros.

Signed-off-by: Mans Rullgard <mans@mansr.com>
(cherry picked from commit 365e3c7878)
This commit is contained in:
Mans Rullgard 2011-01-31 02:19:30 +00:00 committed by Michael Niedermayer
parent a735bbbb7a
commit 0374152f89
3 changed files with 14 additions and 15 deletions
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13
libavutil/attributes.h
View File

@ -96,6 +96,19 @@
#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 (!defined(__ICC) || __ICC > 1200) && AV_GCC_VERSION_AT_LEAST(3,3)
# define av_alias __attribute__((may_alias))

14
libavutil/internal.h
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@ -46,20 +46,6 @@
#endif
#endif
/**
* Mark a variable as used and prevent the compiler from optimizing it away.
* This is useful for asm that accesses varibles in ways that the compiler does not
* understand
*/
#ifndef attribute_used
#if AV_GCC_VERSION_AT_LEAST(3,1)
# define attribute_used __attribute__((used))
#else
# define attribute_used
#endif
#endif
#ifndef INT16_MIN
#define INT16_MIN (-0x7fff - 1)
#endif

2
libavutil/mem.h
View File

@ -41,7 +41,7 @@
static const t __attribute__((aligned(n))) v
#elif defined(__GNUC__)
#define DECLARE_ALIGNED(n,t,v) t __attribute__ ((aligned (n))) v
#define DECLARE_ASM_CONST(n,t,v) static const t attribute_used __attribute__ ((aligned (n))) v
#define DECLARE_ASM_CONST(n,t,v) static const t av_used __attribute__ ((aligned (n))) v
#elif defined(_MSC_VER)
#define DECLARE_ALIGNED(n,t,v) __declspec(align(n)) t v
#define DECLARE_ASM_CONST(n,t,v) __declspec(align(n)) static const t v