Ruby 3.3.6p108 (2024-11-05 revision 75015d4c1f6965b5e85e96fb309f1f2129f933c0)
assume.h
Go to the documentation of this file.
1#ifndef RUBY_BACKWARD2_ASSUME_H /*-*-C++-*-vi:se ft=cpp:*/
2#define RUBY_BACKWARD2_ASSUME_H
23#include "ruby/internal/config.h"
26
27#define ASSUME RBIMPL_ASSUME
28#define UNREACHABLE RBIMPL_UNREACHABLE()
29#define UNREACHABLE_RETURN RBIMPL_UNREACHABLE_RETURN
31/* likely */
32#if RBIMPL_HAS_BUILTIN(__builtin_expect)
43# define RB_LIKELY(x) (__builtin_expect(!!(x), 1))
44
50# define RB_UNLIKELY(x) (__builtin_expect(!!(x), 0))
51#else
52# define RB_LIKELY(x) (x)
53# define RB_UNLIKELY(x) (x)
54#endif
55
56#endif /* RUBY_BACKWARD2_ASSUME_H */
Defines RBIMPL_HAS_BUILTIN.
Defines RBIMPL_ASSUME / RBIMPL_UNREACHABLE.