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mdbx: add expect_with_probability() macro.

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Леонид Юрьев (Leonid Yuriev) 2022-07-27 21:40:42 +03:00
parent 8404cc1fd7
commit c0f8ecd6f2
1 changed files with 10 additions and 0 deletions
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10
src/base.h
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@ -645,6 +645,16 @@ __extern_C key_t ftok(const char *, int);
#endif
#endif /* __anonymous_struct_extension__ */
#ifndef expect_with_probability
#if defined(__builtin_expect_with_probability) || \
__has_builtin(__builtin_expect_with_probability) || __GNUC_PREREQ(9, 0)
#define expect_with_probability(expr, value, prob) \
__builtin_expect_with_probability(expr, value, prob)
#else
#define expect_with_probability(expr, value, prob) (expr)
#endif
#endif /* expect_with_probability */
/*----------------------------------------------------------------------------*/
#if defined(MDBX_USE_VALGRIND)