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#ifndef RBIMPL_ATTR_RESTRICT_H /*-*-C++-*-vi:se ft=cpp:*/ #define RBIMPL_ATTR_RESTRICT_H /** * @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 `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. * @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 #RBIMPL_ATTR_RESTRICT. */ #include "ruby/internal/compiler_since.h" #include "ruby/internal/has/attribute.h" /* :FIXME: config.h includes conflicting `#define restrict`. MSVC can be * detected using `RBIMPL_COMPILER_SINCE()`, but Clang & family cannot use * `__has_declspec_attribute()` which involves macro substitution. */ /** Wraps (or simulates) `__declspec(restrict)` */ #if RBIMPL_COMPILER_SINCE(MSVC, 14, 0, 0) # define RBIMPL_ATTR_RESTRICT() __declspec(re ## strict) #elif RBIMPL_HAS_ATTRIBUTE(malloc) # define RBIMPL_ATTR_RESTRICT() __attribute__((__malloc__)) #elif RBIMPL_COMPILER_SINCE(SunPro, 5, 10, 0) # define RBIMPL_ATTR_RESTRICT() _Pragma("returns_new_memory") #else # define RBIMPL_ATTR_RESTRICT() /* void */ #endif #endif /* RBIMPL_ATTR_RESTRICT_H */
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