Wed, 26 Jun 2013 16:58:37 +0200
8013590: NPG: Add a memory pool MXBean for Metaspace
Reviewed-by: jmasa, mgerdin
1 /*
2 * Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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7 * published by the Free Software Foundation.
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13 * accompanied this code).
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15 * You should have received a copy of the GNU General Public License version
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25 #ifndef SHARE_VM_MEMORY_GENERATIONSPEC_HPP
26 #define SHARE_VM_MEMORY_GENERATIONSPEC_HPP
28 #include "memory/generation.hpp"
30 // The specification of a generation. This class also encapsulates
31 // some generation-specific behavior. This is done here rather than as a
32 // virtual function of Generation because these methods are needed in
33 // initialization of the Generations.
34 class GenerationSpec : public CHeapObj<mtGC> {
35 friend class VMStructs;
36 private:
37 Generation::Name _name;
38 size_t _init_size;
39 size_t _max_size;
41 public:
42 GenerationSpec(Generation::Name name, size_t init_size, size_t max_size) {
43 _name = name;
44 _init_size = init_size;
45 _max_size = max_size;
46 }
48 Generation* init(ReservedSpace rs, int level, GenRemSet* remset);
50 // Accessors
51 Generation::Name name() const { return _name; }
52 size_t init_size() const { return _init_size; }
53 void set_init_size(size_t size) { _init_size = size; }
54 size_t max_size() const { return _max_size; }
55 void set_max_size(size_t size) { _max_size = size; }
57 // Alignment
58 void align(size_t alignment) {
59 set_init_size(align_size_up(init_size(), alignment));
60 set_max_size(align_size_up(max_size(), alignment));
61 }
63 // Return the number of regions contained in the generation which
64 // might need to be independently covered by a remembered set.
65 virtual int n_covered_regions() const { return 1; }
66 };
68 typedef GenerationSpec* GenerationSpecPtr;
70 #endif // SHARE_VM_MEMORY_GENERATIONSPEC_HPP