Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/concurrentMarkSweep/cmsPermGen.hpp @ 1562:dfe27f03244a
Merge
author | trims |
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date | Tue, 01 Jun 2010 11:48:33 -0700 |
parents | c18cbe5936b8 |
children | e41cd7fd68a6 |
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0 | 1 /* |
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2 * Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved. |
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5 * This code is free software; you can redistribute it and/or modify it | |
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13 * accompanied this code). | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
25 class CardTableRS; // fwd decl | |
26 class ConcurrentMarkSweepGeneration; | |
27 | |
28 // A PermGen implemented with a CMS space, collected by a CMS collector. | |
29 class CMSPermGen: public PermGen { | |
30 friend class VMStructs; | |
31 | |
32 protected: | |
33 // The "generation" view. | |
34 ConcurrentMarkSweepGeneration* _gen; | |
35 | |
36 public: | |
37 CMSPermGen(ReservedSpace rs, size_t initial_byte_size, | |
38 CardTableRS* ct, FreeBlockDictionary::DictionaryChoice); | |
39 | |
40 HeapWord* mem_allocate(size_t size); | |
41 | |
42 void compute_new_size(); | |
43 | |
44 Generation* as_gen() const { return _gen; } | |
45 }; | |
46 | |
47 // This is the "generation" view of a CMSPermGen. | |
48 class CMSPermGenGen: public ConcurrentMarkSweepGeneration { | |
49 // Abstractly, this is a subtype that gets access to protected fields. | |
50 friend class CMSPermGen; | |
51 public: | |
52 CMSPermGenGen(ReservedSpace rs, size_t initial_byte_size, | |
53 int level, CardTableRS* ct): | |
54 // See comments in the constructor for CompactibleFreeListSpace | |
55 // regarding not using adaptive free lists for a perm gen. | |
56 ConcurrentMarkSweepGeneration(rs, initial_byte_size, // MinPermHeapExapnsion | |
57 level, ct, false /* use adaptive freelists */, | |
58 (FreeBlockDictionary::DictionaryChoice)CMSDictionaryChoice) | |
59 {} | |
60 | |
61 void initialize_performance_counters(); | |
62 | |
63 const char* name() const { | |
64 return "concurrent-mark-sweep perm gen"; | |
65 } | |
66 | |
67 const char* short_name() const { | |
68 return "CMS Perm"; | |
69 } | |
70 | |
71 bool must_be_youngest() const { return false; } | |
72 bool must_be_oldest() const { return false; } | |
73 }; |