Ruby
3.4.0dev (2024-11-05 revision e440268d51fe02b303e3817a7a733a0dac1c5091)
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Defines ASSUME / RB_LIKELY / UNREACHABLE. More...
#include "ruby/internal/config.h"
#include "ruby/internal/assume.h"
#include "ruby/internal/has/builtin.h"
Go to the source code of this file.
Macros | |
#define | ASSUME RBIMPL_ASSUME |
Old name of RBIMPL_ASSUME. More... | |
#define | UNREACHABLE RBIMPL_UNREACHABLE() |
Old name of RBIMPL_UNREACHABLE. More... | |
#define | UNREACHABLE_RETURN RBIMPL_UNREACHABLE_RETURN |
Old name of RBIMPL_UNREACHABLE_RETURN. More... | |
#define | RB_LIKELY(x) (__builtin_expect(!!(x), 1)) |
Asserts that the given Boolean expression likely holds. More... | |
#define | RB_UNLIKELY(x) (__builtin_expect(!!(x), 0)) |
Asserts that the given Boolean expression likely doesn't hold. More... | |
Defines ASSUME / RB_LIKELY / UNREACHABLE.
RBIMPL
or rbimpl
are implementation details. Don't take them as canon. They could rapidly appear then vanish. The name (path) of this header file is also an implementation detail. Do not expect it to persist at the place it is now. Developers are free to move it anywhere anytime at will. __VA_ARGS__
is always available. We assume C99 for ruby itself but we don't assume languages of extension libraries. They could be written in C++98. Definition in file assume.h.
#define RB_LIKELY | ( | x | ) | (__builtin_expect(!!(x), 1)) |
Asserts that the given Boolean expression likely holds.
x | An expression that likely holds. |