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Diffstat (limited to 'include/ruby/3/attr/cold.h')
| -rw-r--r-- | include/ruby/3/attr/cold.h | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/include/ruby/3/attr/cold.h b/include/ruby/3/attr/cold.h new file mode 100644 index 0000000000..6c1093d1ff --- /dev/null +++ b/include/ruby/3/attr/cold.h @@ -0,0 +1,38 @@ +/** \noop-*-C++-*-vi:ft=cpp + * @file + * @author Ruby developers <ruby-core@ruby-lang.org> + * @copyright This file is a part of the programming language Ruby. + * Permission is hereby granted, to either redistribute and/or + * modify this file, provided that the conditions mentioned in the + * file COPYING are met. Consult the file for details. + * @warning Symbols prefixed with either `RUBY3` or `ruby3` 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. + * @note To ruby-core: remember that this header can be possibly + * recursively included from extension libraries written in C++. + * Do not expect for instance `__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. + * @brief Defines #RUBY3_ATTR_COLD. + */ +#include "ruby/3/compiler_is.h" +#include "ruby/3/has/attribute.h" + +/** Wraps (or simulates) `__attribute__((cold))` */ +#if defined(RUBY3_ATTR_COLD) +# /* Take that. */ + +#elif RUBY3_COMPILER_IS(SunPro) +# /* Recent SunPro has __has_attribute, and is borken. */ +# /* It reports it has attribute cold, reality isn't (warnings issued). */ +# define RUBY3_ATTR_COLD() /* void */ + +#elif RUBY3_HAS_ATTRIBUTE(cold) +# define RUBY3_ATTR_COLD() __attribute__((__cold__)) + +#else +# define RUBY3_ATTR_COLD() /* void */ +#endif |