/*

 * Copyright (c) 2015, 2017, 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.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

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 */

#ifndef SHARE_GC_Z_ZPAGECACHE_HPP

#define SHARE_GC_Z_ZPAGECACHE_HPP

#include "gc/z/zList.hpp"

#include "gc/z/zPage.hpp"

#include "gc/z/zValue.hpp"

#include "memory/allocation.hpp"

class ZPageCache {

private:

  size_t                  _available;

  ZPerNUMA<ZList<ZPage> > _small;

  ZList<ZPage>            _medium;

  ZList<ZPage>            _large;

  ZPage* alloc_small_page();

  ZPage* alloc_medium_page();

  ZPage* alloc_large_page(size_t size);

  void flush_list(ZList<ZPage>* from, size_t requested, ZList<ZPage>* to, size_t* flushed);

  void flush_per_numa_lists(ZPerNUMA<ZList<ZPage> >* from, size_t requested, ZList<ZPage>* to, size_t* flushed);

public:

  ZPageCache();

  size_t available() const;

  ZPage* alloc_page(uint8_t type, size_t size);

  void free_page(ZPage* page);

  void flush(ZList<ZPage>* to, size_t requested);

};

#endif // SHARE_GC_Z_ZPAGECACHE_HPP