//
// Created by Kosho on 2020年10月13日.
//

#ifndef PYTHONVM_HANDLES_HPP
#define PYTHONVM_HANDLES_HPP

class HiObject;

class OopClosure;

class Handle {
 friend class HandleMark;

private:
 HiObject *_value;
 Handle *_next;

public:
 Handle(HiObject *t);

 ~Handle();

 void oops_do(OopClosure *f);

 HiObject *operator->();

 HiObject *operator()() { return _value; }

 HiObject *resolve();
};

class HandleMark {
private:
 static HandleMark *instance;
 Handle *_head;

public:
 HandleMark();

 static HandleMark *get_instance();

 void oops_do(OopClosure *f);

 Handle *head() { return _head; }

 void set_head(Handle *x) { _head = x; }
};

#endif //PYTHONVM_HANDLES_HPP