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21991e6ca5
Assertions in header files slows down an interpreter, so they should be turned off by default (simple `make`). To enable them, define a macro `RUBY_DEBUG=1` (e.g. `make cppflags=-DRUBY_DEBUG` or use `#define` at the very beggining of the file. Note that even if `NDEBUG=1` is defined, `RUBY_DEBUG=1` enables all assertions. [Feature #16837] related: https://github.com/ruby/ruby/pull/3120 `assert()` lines in MRI *.c is not disabled even if `RUBY_DEBUG=0` and it can be disabled with `NDEBUG=1`. So please consider to use `RUBY_ASSERT()` if you want to disable them when `RUBY_DEBUG=0`.
85 lines
3.1 KiB
C++
85 lines
3.1 KiB
C++
#ifndef RBIMPL_RBASIC_H /*-*-C++-*-vi:se ft=cpp:*/
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#define RBIMPL_RBASIC_H
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/**
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* @file
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* @author Ruby developers <ruby-core@ruby-lang.org>
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* @copyright This file is a part of the programming language Ruby.
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* Permission is hereby granted, to either redistribute and/or
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* modify this file, provided that the conditions mentioned in the
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* file COPYING are met. Consult the file for details.
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* @warning Symbols prefixed with either `RBIMPL` or `rbimpl` are
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* implementation details. Don't take them as canon. They could
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* rapidly appear then vanish. The name (path) of this header file
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* is also an implementation detail. Do not expect it to persist
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* at the place it is now. Developers are free to move it anywhere
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* anytime at will.
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* @note To ruby-core: remember that this header can be possibly
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* recursively included from extension libraries written in C++.
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* Do not expect for instance `__VA_ARGS__` is always available.
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* We assume C99 for ruby itself but we don't assume languages of
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* extension libraries. They could be written in C++98.
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* @brief Defines struct ::RBasic.
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*/
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#include "ruby/internal/attr/artificial.h"
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#include "ruby/internal/attr/constexpr.h"
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#include "ruby/internal/attr/forceinline.h"
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#include "ruby/internal/attr/noalias.h"
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#include "ruby/internal/attr/pure.h"
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#include "ruby/internal/cast.h"
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#include "ruby/internal/dllexport.h"
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#include "ruby/internal/special_consts.h"
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#include "ruby/internal/value.h"
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#include "ruby/assert.h"
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#define RBASIC(obj) RBIMPL_CAST((struct RBasic *)(obj))
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#define RBASIC_CLASS RBASIC_CLASS
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#define RVALUE_EMBED_LEN_MAX RVALUE_EMBED_LEN_MAX
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/** @cond INTERNAL_MACRO */
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#define RBIMPL_EMBED_LEN_MAX_OF(T) \
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RBIMPL_CAST((int)(sizeof(VALUE[RVALUE_EMBED_LEN_MAX]) / sizeof(T)))
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/** @endcond */
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enum ruby_rvalue_flags { RVALUE_EMBED_LEN_MAX = 3 };
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struct
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RUBY_ALIGNAS(SIZEOF_VALUE)
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RBasic {
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VALUE flags; /**< @see enum ::ruby_fl_type. */
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const VALUE klass;
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#ifdef __cplusplus
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public:
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RBIMPL_ATTR_CONSTEXPR(CXX11)
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RBIMPL_ATTR_ARTIFICIAL()
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RBIMPL_ATTR_FORCEINLINE()
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RBIMPL_ATTR_NOALIAS()
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/**
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* We need to define this explicit constructor because the field `klass` is
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* const-qualified above, which effectively defines the implicit default
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* constructor as "deleted" (as of C++11) -- No way but to define one by
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* ourselves.
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*/
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RBasic() :
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flags(RBIMPL_VALUE_NULL),
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klass(RBIMPL_VALUE_NULL)
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{
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}
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#endif
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};
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RBIMPL_SYMBOL_EXPORT_BEGIN()
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VALUE rb_obj_hide(VALUE obj);
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VALUE rb_obj_reveal(VALUE obj, VALUE klass); /* do not use this API to change klass information */
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RBIMPL_SYMBOL_EXPORT_END()
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RBIMPL_ATTR_PURE_UNLESS_DEBUG()
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RBIMPL_ATTR_ARTIFICIAL()
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static inline VALUE
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RBASIC_CLASS(VALUE obj)
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{
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RBIMPL_ASSERT_OR_ASSUME(! RB_SPECIAL_CONST_P(obj));
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return RBASIC(obj)->klass;
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}
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#endif /* RBIMPL_RBASIC_H */
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