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ruby--ruby/include/ruby/impl/attr/cold.h

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add #include guard hack According to MSVC manual (*1), cl.exe can skip including a header file when that: - contains #pragma once, or - starts with #ifndef, or - starts with #if ! defined. GCC has a similar trick (*2), but it acts more stricter (e. g. there must be _no tokens_ outside of #ifndef...#endif). Sun C lacked #pragma once for a looong time. Oracle Developer Studio 12.5 finally implemented it, but we cannot assume such recent version. This changeset modifies header files so that each of them include strictly one #ifndef...#endif. I believe this is the most portable way to trigger compiler optimizations. [Bug #16770] *1: https://docs.microsoft.com/en-us/cpp/preprocessor/once *2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
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#ifndef RUBY3_ATTR_COLD_H /*-*-C++-*-vi:se ft=cpp:*/
#define RUBY3_ATTR_COLD_H
/**
Merge pull request #2991 from shyouhei/ruby.h Split ruby.h
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* @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.
*/
sed -i s|ruby/3|ruby/impl|g This shall fix compile errors.
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#include "ruby/impl/compiler_is.h"
#include "ruby/impl/has/attribute.h"
Merge pull request #2991 from shyouhei/ruby.h Split ruby.h
2020-04-08 00:28:13 -04:00
/** Wraps (or simulates) `__attribute__((cold))` */
add #include guard hack According to MSVC manual (*1), cl.exe can skip including a header file when that: - contains #pragma once, or - starts with #ifndef, or - starts with #if ! defined. GCC has a similar trick (*2), but it acts more stricter (e. g. there must be _no tokens_ outside of #ifndef...#endif). Sun C lacked #pragma once for a looong time. Oracle Developer Studio 12.5 finally implemented it, but we cannot assume such recent version. This changeset modifies header files so that each of them include strictly one #ifndef...#endif. I believe this is the most portable way to trigger compiler optimizations. [Bug #16770] *1: https://docs.microsoft.com/en-us/cpp/preprocessor/once *2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
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#if RUBY3_COMPILER_IS(SunPro)
Merge pull request #2991 from shyouhei/ruby.h Split ruby.h
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# /* 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
add #include guard hack According to MSVC manual (*1), cl.exe can skip including a header file when that: - contains #pragma once, or - starts with #ifndef, or - starts with #if ! defined. GCC has a similar trick (*2), but it acts more stricter (e. g. there must be _no tokens_ outside of #ifndef...#endif). Sun C lacked #pragma once for a looong time. Oracle Developer Studio 12.5 finally implemented it, but we cannot assume such recent version. This changeset modifies header files so that each of them include strictly one #ifndef...#endif. I believe this is the most portable way to trigger compiler optimizations. [Bug #16770] *1: https://docs.microsoft.com/en-us/cpp/preprocessor/once *2: https://gcc.gnu.org/onlinedocs/cppinternals/Guard-Macros.html
2020-04-10 01:11:40 -04:00
#endif /* RUBY3_ATTR_COLD_H */
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