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macro: Move PA_LIKELY()/PA_UNLIKELY(), PA_CLAMP()/PA_CLAMP_UNLIKELY() to pulse/gccmacro.h

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PA_CLAMP_VOLUME() in pulse/volume.h makes use of PA_CLAMP_UNLIKELY()

see https://bugs.freedesktop.org/show_bug.cgi?id=89515

Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net>
This commit is contained in:
Peter Meerwald 2015-05-20 17:03:52 +02:00 • committed by Tanu Kaskinen
parent 1f5da4c20b
commit d6b69444be
2 changed files with 38 additions and 38 deletions
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38
src/pulse/gccmacro.h
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@ -129,4 +129,42 @@
#endif
#endif
#ifndef PA_LIKELY
#ifdef __GNUC__
#define PA_LIKELY(x) (__builtin_expect(!!(x),1))
#define PA_UNLIKELY(x) (__builtin_expect(!!(x),0))
#else
#define PA_LIKELY(x) (x)
#define PA_UNLIKELY(x) (x)
#endif
#endif
#ifdef __GNUC__
#define PA_CLAMP(x, low, high) \
__extension__ ({ \
typeof(x) _x = (x); \
typeof(low) _low = (low); \
typeof(high) _high = (high); \
((_x > _high) ? _high : ((_x < _low) ? _low : _x)); \
})
#else
#define PA_CLAMP(x, low, high) (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x)))
#endif
#ifdef __GNUC__
#define PA_CLAMP_UNLIKELY(x, low, high) \
__extension__ ({ \
typeof(x) _x = (x); \
typeof(low) _low = (low); \
typeof(high) _high = (high); \
(PA_UNLIKELY(_x > _high) ? _high : (PA_UNLIKELY(_x < _low) ? _low : _x)); \
})
#else
#define PA_CLAMP_UNLIKELY(x, low, high) (PA_UNLIKELY((x) > (high)) ? (high) : (PA_UNLIKELY((x) < (low)) ? (low) : (x)))
#endif
/* We don't define a PA_CLAMP_LIKELY here, because it doesn't really
* make sense: we cannot know if it is more likely that the value is
* lower or greater than the boundaries. */
#endif