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Diffstat (limited to 'include/ruby/impl/stdalign.h')
| -rw-r--r-- | include/ruby/impl/stdalign.h | 124 |
1 files changed, 0 insertions, 124 deletions
diff --git a/include/ruby/impl/stdalign.h b/include/ruby/impl/stdalign.h deleted file mode 100644 index a3dcfb90ef..0000000000 --- a/include/ruby/impl/stdalign.h +++ /dev/null @@ -1,124 +0,0 @@ -#ifndef RBIMPL_STDALIGN_H /*-*-C++-*-vi:se ft=cpp:*/ -#define RBIMPL_STDALIGN_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_ALIGNAS / #RBIMPL_ALIGNOF - */ -#include "ruby/impl/config.h" - -#ifdef HAVE_STDALIGN_H -# include <stdalign.h> -#endif - -#include "ruby/impl/compiler_is.h" -#include "ruby/impl/compiler_since.h" -#include "ruby/impl/has/feature.h" -#include "ruby/impl/has/extension.h" -#include "ruby/impl/has/attribute.h" -#include "ruby/impl/has/declspec_attribute.h" - -/** - * Wraps (or simulates) `alignas`. This is C++11's `alignas` and is _different_ - * from C11 `_Alignas`. For instance, - * - * ```CXX - * typedef struct alignas(128) foo { int foo } foo; - * ``` - * - * is a valid C++ while - * - * ```C - * typedef struct _Alignas(128) foo { int foo } foo; - * ``` - * - * is an invalid C because: - * - * - You cannot `struct _Alignas`. - * - A `typedef` cannot have alignments. - */ -#if defined(__cplusplus) && RBIMPL_HAS_FEATURE(cxx_alignas) -# define RBIMPL_ALIGNAS alignas - -#elif defined(__cplusplus) && (__cplusplus >= 201103L) -# define RBIMPL_ALIGNAS alignas - -#elif defined(__INTEL_CXX11_MODE__) -# define RBIMPL_ALIGNAS alignas - -#elif defined(__GXX_EXPERIMENTAL_CXX0X__) -# define RBIMPL_ALIGNAS alignas - -#elif RBIMPL_HAS_DECLSPEC_ATTRIBUTE(align) -# define RBIMPL_ALIGNAS(_) __declspec(align(_)) - -#elif RBIMPL_HAS_ATTRIBUTE(aliged) -# define RBIMPL_ALIGNAS(_) __attribute__((__aligned__(_))) - -#else -# define RBIMPL_ALIGNAS(_) /* void */ -#endif - -/** - * Wraps (or simulates) `alignof`. Unlike #RBIMPL_ALIGNAS, we can safely say - * both C/C++ definitions are effective. - */ -#if defined(__cplusplus) && RBIMPL_HAS_EXTENSION(cxx_alignof) -# define RBIMPL_ALIGNOF __extension__ alignof - -#elif defined(__cplusplus) && (__cplusplus >= 201103L) -# define RBIMPL_ALIGNOF alignof - -#elif defined(__INTEL_CXX11_MODE__) -# define RBIMPL_ALIGNOF alignof - -#elif defined(__GXX_EXPERIMENTAL_CXX0X__) -# define RBIMPL_ALIGNOF alignof - -#elif defined(__STDC_VERSION__) && RBIMPL_HAS_EXTENSION(c_alignof) -# define RBIMPL_ALIGNOF __extension__ _Alignof - -#elif defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 201112L) -# define RBIMPL_ALIGNOF _Alignof - -#elif RBIMPL_COMPILER_IS(MSVC) -# define RBIMPL_ALIGNOF __alignof - -#elif defined(__GNUC__) -# /* At least GCC 2.95 had this. */ -# define RBIMPL_ALIGNOF __extension__ __alignof__ - -#elif defined(__alignof_is_defined) || defined(__DOXYGEN__) -# /* OK, we can safely take <stdalign.h> definition. */ -# define RBIMPL_ALIGNOF alignof - -#elif RBIMPL_COMPILER_SINCE(SunPro, 5, 9, 0) -# /* According to their manual, Sun Studio 12 introduced __alignof__ for both -# * C/C++. */ -# define RBIMPL_ALIGNOF __alignof__ - -#elif 0 -# /* THIS IS NG, you cannot define a new type inside of offsetof. */ -# /* see: http://www.open-std.org/jtc1/sc22/wg14/www/docs/n2350.htm */ -# define RBIMPL_ALIGNOF(T) offsetof(struct { char _; T t; }, t) - -#else -# error :FIXME: add your compiler here to obtain an alignment. -#endif - -#endif /* RBIMPL_STDALIGN_H */ |