/*
 * Copyright (c) 2015, 2018, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#ifndef SHARE_GC_Z_ZPAGETABLE_HPP
#define SHARE_GC_Z_ZPAGETABLE_HPP

#include "gc/z/zAddressRangeMap.hpp"
#include "gc/z/zGlobals.hpp"
#include "gc/z/zPageTableEntry.hpp"
#include "memory/allocation.hpp"

class ZPage;

class ZPageTable {
  friend class VMStructs;
  friend class ZPageTableIterator;

private:
  ZAddressRangeMap<ZPageTableEntry, ZPageSizeMinShift> _map;

  ZPageTableEntry get_entry(ZPage* page) const;
  void put_entry(ZPage* page, ZPageTableEntry entry);

public:
  ZPageTable();

  ZPage* get(uintptr_t addr) const;
  void insert(ZPage* page);
  void remove(ZPage* page);

  bool is_relocating(uintptr_t addr) const;
  void set_relocating(ZPage* page);
  void clear_relocating(ZPage* page);
};

class ZPageTableIterator : public StackObj {
private:
  ZAddressRangeMapIterator<ZPageTableEntry, ZPageSizeMinShift> _iter;
  ZPage*                                                       _prev;

public:
  ZPageTableIterator(const ZPageTable* pagetable);

  bool next(ZPage** page);
};

#endif // SHARE_GC_Z_ZPAGETABLE_HPP