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,
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24
25#ifndef SHARE_GC_SHARED_GENERATIONCOUNTERS_HPP
26#define SHARE_GC_SHARED_GENERATIONCOUNTERS_HPP
27
28#include "memory/virtualspace.hpp"
29#include "runtime/perfData.hpp"
30
31// A GenerationCounter is a holder class for performance counters
32// that track a generation
33
34class GenerationCounters: public CHeapObj<mtGC> {
35 friend class VMStructs;
36
37private:
38 void initialize(const char* name, int ordinal, int spaces,
39 size_t min_capacity, size_t max_capacity,
40 size_t curr_capacity);
41
42 protected:
43 PerfVariable* _current_size;
44 VirtualSpace* _virtual_space;
45
46 // Constant PerfData types don't need to retain a reference.
47 // However, it's a good idea to document them here.
48 // PerfStringConstant* _name;
49 // PerfConstant* _min_size;
50 // PerfConstant* _max_size;
51 // PerfConstant* _spaces;
52
53 char* _name_space;
54
55 // This constructor is only meant for use with the PSGenerationCounters
56 // constructor. The need for such an constructor should be eliminated
57 // when VirtualSpace and PSVirtualSpace are unified.
58 GenerationCounters()
59 : _current_size(NULL), _virtual_space(NULL), _name_space(NULL) {}
60
61 // This constructor is used for subclasses that do not have a space
62 // associated with them (e.g, in G1).
63 GenerationCounters(const char* name, int ordinal, int spaces,
64 size_t min_capacity, size_t max_capacity,
65 size_t curr_capacity);
66
67 public:
68 GenerationCounters(const char* name, int ordinal, int spaces,
69 size_t min_capacity, size_t max_capacity, VirtualSpace* v);
70
71 ~GenerationCounters();
72
73 virtual void update_all();
74
75 const char* name_space() const { return _name_space; }
76
77};
78#endif // SHARE_GC_SHARED_GENERATIONCOUNTERS_HPP
79