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97 lines
3.1 KiB
C++
97 lines
3.1 KiB
C++
#ifndef RUBY3_ROBJECT_H /*-*-C++-*-vi:se ft=cpp:*/
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#define RUBY3_ROBJECT_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 `RUBY3` or `ruby3` 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 ::RObject.
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*/
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#include "ruby/3/config.h"
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#ifdef HAVE_STDINT_H
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# include <stdint.h>
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#endif
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#include "ruby/3/attr/artificial.h"
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#include "ruby/3/attr/pure.h"
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#include "ruby/3/cast.h"
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#include "ruby/3/fl_type.h"
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#include "ruby/3/value.h"
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#include "ruby/3/value_type.h"
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#define ROBJECT(obj) RUBY3_CAST((struct RObject *)(obj))
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#define ROBJECT_EMBED_LEN_MAX ROBJECT_EMBED_LEN_MAX
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#define ROBJECT_EMBED ROBJECT_EMBED
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/** @cond INTERNAL_MACRO */
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#define ROBJECT_NUMIV ROBJECT_NUMIV
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#define ROBJECT_IVPTR ROBJECT_IVPTR
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/** @endcond */
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enum ruby_robject_flags { ROBJECT_EMBED = RUBY_FL_USER1 };
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enum ruby_robject_consts { ROBJECT_EMBED_LEN_MAX = RUBY3_EMBED_LEN_MAX_OF(VALUE) };
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struct RObject {
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struct RBasic basic;
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union {
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struct {
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uint32_t numiv;
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VALUE *ivptr;
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void *iv_index_tbl; /* shortcut for RCLASS_IV_INDEX_TBL(rb_obj_class(obj)) */
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} heap;
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VALUE ary[ROBJECT_EMBED_LEN_MAX];
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} as;
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};
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RUBY3_ATTR_PURE_ON_NDEBUG()
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RUBY3_ATTR_ARTIFICIAL()
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static inline uint32_t
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ROBJECT_NUMIV(VALUE obj)
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{
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RUBY3_ASSERT_TYPE(obj, RUBY_T_OBJECT);
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if (RB_FL_ANY_RAW(obj, ROBJECT_EMBED)) {
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return ROBJECT_EMBED_LEN_MAX;
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}
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else {
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return ROBJECT(obj)->as.heap.numiv;
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}
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}
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RUBY3_ATTR_PURE_ON_NDEBUG()
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RUBY3_ATTR_ARTIFICIAL()
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static inline VALUE *
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ROBJECT_IVPTR(VALUE obj)
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{
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RUBY3_ASSERT_TYPE(obj, RUBY_T_OBJECT);
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struct RObject *const ptr = ROBJECT(obj);
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if (RB_FL_ANY_RAW(obj, ROBJECT_EMBED)) {
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return ptr->as.ary;
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}
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else {
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return ptr->as.heap.ivptr;
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}
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}
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#define ROBJECT_IV_INDEX_TBL(o) \
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((RBASIC(o)->flags & ROBJECT_EMBED) ? \
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RCLASS_IV_INDEX_TBL(rb_obj_class(o)) : \
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ROBJECT(o)->as.heap.iv_index_tbl)
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#endif /* RUBY3_ROBJECT_H */
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