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