/*

 * Copyright (c) 2018, 2019, 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_MEMORY_METASPACE_CHUNKMANAGER_HPP

#define SHARE_MEMORY_METASPACE_CHUNKMANAGER_HPP

#include "memory/allocation.hpp"

#include "memory/metaspace/metaspaceCommon.hpp"

#include "memory/metaspace/spaceManager.hpp"

namespace metaspace {

class ClassLoaderMetaspace : public CHeapObj<mtClass> {

  // The CLD lock.

  Mutex* const _lock;

  const Metaspace::MetaspaceType _space_type;

  metaspace::SpaceManager* _non_class_space_manager;

  metaspace::SpaceManager* _class_space_manager;

  Mutex* lock() const                                       { return _lock; }

  metaspace::SpaceManager* non_class_space_manager() const  { return _non_class_space_manager; }

  metaspace::SpaceManager* class_space_manager() const      { return _class_space_manager; }

  metaspace::SpaceManager* get_space_manager(bool is_class) {

    return is_class ? class_space_manager() : non_class_space_manager();

  }

public:

  ClassLoaderMetaspace(Mutex* lock, Metaspace::MetaspaceType space_type);

  ~ClassLoaderMetaspace();

  // Allocate word_size words from Metaspace.

  MetaWord* allocate(size_t word_size, bool is_class);

  // Attempt to expand the GC threshold to be good for at least another word_size words

  // and allocate. Returns NULL if failure. Used during Metaspace GC.

  MetaWord* expand_GC_threshold_and_allocate(size_t word_size, bool is_class);

  // Prematurely returns a metaspace allocation to the _block_freelists

  // because it is not needed anymore.

  void deallocate(MetaWord* ptr, size_t word_size, bool is_class);

  DEBUG_ONLY(void verify(bool slow) const;)

};

} // namespace metaspace

#endif // SHARE_MEMORY_METASPACE_CHUNKMANAGER_HPP