// vi:ft=cpp
/*
 * (c) 2010 Alexander Warg <warg@os.inf.tu-dresden.de>
 *     economic rights: Technische Universität Dresden (Germany)
 *
 * This file is part of TUD:OS and distributed under the terms of the
 * GNU General Public License 2.
 * Please see the COPYING-GPL-2 file for details.
 */
#pragma once

#include <l4/sys/cxx/ipc_epiface>
#include <l4/cxx/ref_ptr>
#include <l4/cxx/hlist>
#include <l4/re/util/object_registry>

#include <cassert>

namespace Mag_server {

class Object_gc;

class Object : public L4::Epiface, public cxx::H_list_item
{
private:
  friend class Object_gc;
  template< typename T >
  friend class Gc_ref_count;

  mutable int _ref_cnt;

  void enqueue(cxx::H_list<Object> *q)
  {
    q->add(this);
  }

public:
  Object() : _ref_cnt(0)
  {}

  void add_ref() const throw() { ++_ref_cnt; }
  int remove_ref() const throw() { return --_ref_cnt; }

  virtual void destroy() = 0;
  virtual ~Object() = 0;
};

inline Object::~Object() {}



class Registry : protected L4Re::Util::Object_registry
{
public:
  Registry(L4::Ipc_svr::Server_iface *sif)
  : L4Re::Util::Object_registry(sif)
  {}

  L4::Cap<void> register_obj(cxx::Ref_ptr<Object> o)
  {
    L4::Cap<void> r = L4Re::Util::Object_registry::register_obj(o.ptr());

    if (r)
      add_gc_obj(o.release());

    return r;
  }

  L4::Cap<void> register_obj(cxx::Ref_ptr<Object> o, char const *name)
  {
    L4::Cap<void> r = L4Re::Util::Object_registry::register_obj(o.ptr(), name);

    if (r)
      add_gc_obj(o.release());

    return r;
  }

  virtual void add_gc_obj(Object *o) = 0;

  using L4Re::Util::Object_registry::dispatch;
};

}