1/*
2 * Copyright (c) 2003, 2019, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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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
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24
25#ifndef SHARE_GC_PARALLEL_ASPSYOUNGGEN_HPP
26#define SHARE_GC_PARALLEL_ASPSYOUNGGEN_HPP
27
28#include "gc/parallel/mutableSpace.hpp"
29#include "gc/parallel/objectStartArray.hpp"
30#include "gc/parallel/psVirtualspace.hpp"
31#include "gc/parallel/psYoungGen.hpp"
32#include "gc/parallel/spaceCounters.hpp"
33#include "gc/shared/generationCounters.hpp"
34#include "gc/shared/spaceDecorator.hpp"
35
36class ASPSYoungGen : public PSYoungGen {
37 friend class VMStructs;
38 private:
39 size_t _gen_size_limit;
40 protected:
41 virtual size_t available_to_live();
42
43 public:
44 ASPSYoungGen(size_t initial_byte_size,
45 size_t minimum_byte_size,
46 size_t byte_size_limit);
47
48 ASPSYoungGen(PSVirtualSpace* vs,
49 size_t initial_byte_size,
50 size_t minimum_byte_size,
51 size_t byte_size_limit);
52
53 void initialize(ReservedSpace rs, size_t alignment);
54 void initialize_virtual_space(ReservedSpace rs, size_t alignment);
55
56 size_t gen_size_limit() { return _gen_size_limit; }
57 void set_gen_size_limit(size_t v) { _gen_size_limit = v; }
58
59 bool resize_generation(size_t eden_size, size_t survivor_size);
60 void resize_spaces(size_t eden_size, size_t survivor_size);
61
62 // Adjust eden to be consistent with the virtual space.
63 void reset_after_change();
64
65 // Adaptive size policy support
66 // Return number of bytes that the generation can expand/contract.
67 size_t available_for_expansion();
68 size_t available_for_contraction();
69
70 // Accessors
71 void set_reserved(MemRegion v) { _reserved = v; }
72
73 // Printing support
74 virtual const char* short_name() const { return "ASPSYoungGen"; }
75};
76
77#endif // SHARE_GC_PARALLEL_ASPSYOUNGGEN_HPP
78