1/*
2 * Copyright (c) 2012, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25#ifndef SHARE_MEMORY_METASPACE_METABLOCK_HPP
26#define SHARE_MEMORY_METASPACE_METABLOCK_HPP
27
28#include "memory/metaspace/metabase.hpp"
29#include "utilities/globalDefinitions.hpp"
30
31namespace metaspace {
32
33// Metablock is the unit of allocation from a Chunk.
34//
35// A Metablock may be reused by its SpaceManager but are never moved between
36// SpaceManagers. There is no explicit link to the Metachunk
37// from which it was allocated. Metablock may be deallocated and
38// put on a freelist but the space is never freed, rather
39// the Metachunk it is a part of will be deallocated when it's
40// associated class loader is collected.
41
42class Metablock : public Metabase<Metablock> {
43 friend class VMStructs;
44 public:
45 Metablock(size_t word_size) : Metabase<Metablock>(word_size) {}
46};
47
48} // namespace metaspace
49
50#endif // SHARE_MEMORY_METASPACE_METABLOCK_HPP
51