1/*
2 * Copyright (c) 2015, 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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
24
25#ifndef SHARE_GC_G1_G1EDENREGIONS_HPP
26#define SHARE_GC_G1_G1EDENREGIONS_HPP
27
28#include "gc/g1/heapRegion.hpp"
29#include "runtime/globals.hpp"
30#include "utilities/debug.hpp"
31
32class G1EdenRegions {
33private:
34 int _length;
35 // Sum of used bytes from all retired eden regions.
36 // I.e. updated when mutator regions are retired.
37 volatile size_t _used_bytes;
38
39public:
40 G1EdenRegions() : _length(0), _used_bytes(0) { }
41
42 void add(HeapRegion* hr) {
43 assert(!hr->is_eden(), "should not already be set");
44 _length++;
45 }
46
47 void clear() { _length = 0; _used_bytes = 0; }
48
49 uint length() const { return _length; }
50
51 size_t used_bytes() const { return _used_bytes; }
52
53 void add_used_bytes(size_t used_bytes) {
54 _used_bytes += used_bytes;
55 }
56};
57
58#endif // SHARE_GC_G1_G1EDENREGIONS_HPP
59