view src/hotspot/share/memory/metaspace/metablock.hpp @ 51151:1ddf9a99e4ad

Added tag jdk-11+28 for changeset 76072a077ee1
author jwilhelm
date Wed, 22 Aug 2018 21:50:12 +0200
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/*
 * Copyright (c) 2012, 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.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 *
 */

#ifndef SHARE_MEMORY_METASPACE_METABLOCK_HPP
#define SHARE_MEMORY_METASPACE_METABLOCK_HPP

#include "memory/metaspace/metabase.hpp"
#include "utilities/globalDefinitions.hpp"

namespace metaspace {

// Metablock is the unit of allocation from a Chunk.
//
// A Metablock may be reused by its SpaceManager but are never moved between
// SpaceManagers.  There is no explicit link to the Metachunk
// from which it was allocated.  Metablock may be deallocated and
// put on a freelist but the space is never freed, rather
// the Metachunk it is a part of will be deallocated when it's
// associated class loader is collected.

class Metablock : public Metabase<Metablock> {
  friend class VMStructs;
 public:
  Metablock(size_t word_size) : Metabase<Metablock>(word_size) {}
};

} // namespace metaspace

#endif /* SHARE_MEMORY_METASPACE_METABLOCK_HPP */