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Merge "Define LIKELY and UNLIKELY in a vendor friendly way"

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am: 7ed5194

* commit '7ed5194278dd9ffcda203dd3a8250c0cb2914d07':
  Define LIKELY and UNLIKELY in a vendor friendly way

Change-Id: Ie782284f30e731b6ee26b99c39e532b27210eaec
This commit is contained in:
Christopher Wiley 2016-04-19 15:44:11 +00:00 • committed by android-build-merger
commit 6590a92777
1 changed files with 5 additions and 2 deletions
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base/include/android-base/macros.h
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@ -123,8 +123,11 @@ char(&ArraySizeHelper(T(&array)[N]))[N]; // NOLINT(readability/casting)
((sizeof(a) / sizeof(*(a))) / \
static_cast<size_t>(!(sizeof(a) % sizeof(*(a)))))
#define LIKELY(x) __builtin_expect((x), true)
#define UNLIKELY(x) __builtin_expect((x), false)
// Changing this definition will cause you a lot of pain. A majority of
// vendor code defines LIKELY and UNLIKELY this way, and includes
// this header through an indirect path.
#define LIKELY( exp ) (__builtin_expect( (exp) != 0, true ))
#define UNLIKELY( exp ) (__builtin_expect( (exp) != 0, false ))
#define WARN_UNUSED __attribute__((warn_unused_result))