asPSOldGen.hpp revision 8413:92457dfb91bd 
1/*
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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
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7 * published by the Free Software Foundation.
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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24
25#ifndef SHARE_VM_GC_PARALLEL_ASPSOLDGEN_HPP
26#define SHARE_VM_GC_PARALLEL_ASPSOLDGEN_HPP
27
28#include "gc/parallel/mutableSpace.hpp"
29#include "gc/parallel/objectStartArray.hpp"
30#include "gc/parallel/psOldGen.hpp"
31#include "gc/parallel/psVirtualspace.hpp"
32#include "gc/parallel/spaceCounters.hpp"
33#include "gc/shared/generationCounters.hpp"
34
35class ASPSOldGen : public PSOldGen {
36  friend class VMStructs;
37  size_t _gen_size_limit;  // Largest size the generation's reserved size
38                           // can grow.
39 public:
40  ASPSOldGen(size_t initial_byte_size,
41             size_t minimum_byte_size,
42             size_t byte_size_limit,
43             const char* gen_name, int level);
44  ASPSOldGen(PSVirtualSpace* vs,
45             size_t initial_byte_size,
46             size_t minimum_byte_size,
47             size_t byte_size_limit,
48             const char* gen_name, int level);
49  size_t gen_size_limit()               { return _gen_size_limit; }
50  size_t max_gen_size()                 { return _reserved.byte_size(); }
51  void set_gen_size_limit(size_t v)     { _gen_size_limit = v; }
52
53  virtual void initialize_work(const char* perf_data_name, int level);
54
55  // After a shrink or expand reset the generation
56  void reset_after_change();
57
58  // Return number of bytes that the virtual space in the generation is willing
59  // to expand or contract.  The results from these methods should feed into the
60  // decisions about adjusting the virtual space.
61  size_t available_for_expansion();
62  size_t available_for_contraction();
63
64  // Accessors
65  void set_reserved(MemRegion v) { _reserved = v; }
66
67  // Debugging support
68  virtual const char* short_name() const { return "ASPSOldGen"; }
69};
70
71#endif // SHARE_VM_GC_PARALLEL_ASPSOLDGEN_HPP
72