#include "util/handles.hpp"
#include "memory/oopClosure.hpp"

#include <stdio.h>

HandleMark* HandleMark::instance = NULL;

HandleMark::HandleMark() {
 _head = 0x0;
}

HandleMark* HandleMark::get_instance() {
 if (!instance)
 instance = new HandleMark();

 return instance;
}

void HandleMark::oops_do(OopClosure* f) {
 Handle* cur = _head;
 while (cur) {
 cur->oops_do(f);
 cur = cur->_next;
 }
}

Handle::Handle(HiObject* t) {
 _value = t;

 _next = HandleMark::get_instance()->head();
 HandleMark::get_instance()->set_head(this);
}

Handle::~Handle() {
 _value = 0x0;
 
 HandleMark::get_instance()->set_head(_next);
 _next = 0x0;
}

HiObject* Handle::operator ->() {
 return _value;
}

void Handle::oops_do(OopClosure* f) {
 f->do_oop(&_value);
}

HiObject* Handle::resolve() {
 return _value;
}