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Define LIKELY and UNLIKELY in a vendor friendly way 

This prevents macro conflicts with vendor code.

Bug: 27804373
Change-Id: I759c2b7b611203d0afdc35ddd5c2adb8f942ea17
Test: Compiles when libbinder include path changes to include libbase.
This commit is contained in:
Christopher Wiley 2016-04-18 16:08:19 -07:00
parent c2241b9c5d
commit ec9ea66a2b
1 changed files with 5 additions and 2 deletions
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7
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))