object.h

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#ifndef MRUBY_OBJECT_H
#define MRUBY_OBJECT_H

#define MRB_OBJECT_HEADER \
  struct RClass *c;       \
  struct RBasic *gcnext;  \
  enum mrb_vtype tt:8;    \
  uint32_t color:3;       \
  uint32_t flags:21

#define MRB_FLAG_TEST(obj, flag) ((obj)->flags & (flag))

struct RBasic {
  MRB_OBJECT_HEADER;
};
#define mrb_basic_ptr(v) ((struct RBasic*)(mrb_ptr(v)))

#define MRB_FL_OBJ_IS_FROZEN (1 << 20)
#define MRB_FROZEN_P(o) ((o)->flags & MRB_FL_OBJ_IS_FROZEN)
#define MRB_SET_FROZEN_FLAG(o) ((o)->flags |= MRB_FL_OBJ_IS_FROZEN)
#define MRB_UNSET_FROZEN_FLAG(o) ((o)->flags &= ~MRB_FL_OBJ_IS_FROZEN)

struct RObject {
  MRB_OBJECT_HEADER;
  struct iv_tbl *iv;
};
#define mrb_obj_ptr(v)   ((struct RObject*)(mrb_ptr(v)))

#define mrb_immediate_p(x) (mrb_type(x) < MRB_TT_HAS_BASIC)
#define mrb_special_const_p(x) mrb_immediate_p(x)

struct RFiber {
  MRB_OBJECT_HEADER;
  struct mrb_context *cxt;
};

#endif  /* MRUBY_OBJECT_H */