1/*
2 * Copyright (c) 2002, 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_PARALLEL_SPACECOUNTERS_HPP
26#define SHARE_GC_PARALLEL_SPACECOUNTERS_HPP
27
28#include "gc/parallel/immutableSpace.hpp"
29#include "gc/parallel/mutableSpace.hpp"
30#include "gc/shared/generationCounters.hpp"
31#include "runtime/perfData.hpp"
32#include "utilities/macros.hpp"
33
34// A SpaceCounter is a holder class for performance counters
35// that track a space;
36
37class SpaceCounters: public CHeapObj<mtGC> {
38 friend class VMStructs;
39
40 private:
41 PerfVariable* _capacity;
42 PerfVariable* _used;
43
44 // Constant PerfData types don't need to retain a reference.
45 // However, it's a good idea to document them here.
46 // PerfConstant* _size;
47
48 MutableSpace* _object_space;
49 char* _name_space;
50
51 public:
52
53 SpaceCounters(const char* name, int ordinal, size_t max_size,
54 MutableSpace* m, GenerationCounters* gc);
55
56 ~SpaceCounters();
57
58 inline void update_capacity() {
59 _capacity->set_value(_object_space->capacity_in_bytes());
60 }
61
62 inline void update_used() {
63 _used->set_value(_object_space->used_in_bytes());
64 }
65
66 inline void update_all() {
67 update_used();
68 update_capacity();
69 }
70
71 const char* name_space() const { return _name_space; }
72};
73
74class MutableSpaceUsedHelper: public PerfLongSampleHelper {
75 private:
76 MutableSpace* _m;
77
78 public:
79 MutableSpaceUsedHelper(MutableSpace* m) : _m(m) { }
80
81 inline jlong take_sample() {
82 return _m->used_in_bytes();
83 }
84};
85
86#endif // SHARE_GC_PARALLEL_SPACECOUNTERS_HPP
87