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annotate src/share/vm/gc_implementation/shared/liveRange.hpp @ 3687:7958ebb561b0
Merge
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Fri, 18 Nov 2011 17:20:38 +0100 |
parents | f95d63e2154a |
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rev | line source |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved. |
0 | 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 | |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
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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). | |
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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 | |
1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_SHARED_LIVERANGE_HPP |
26 #define SHARE_VM_GC_IMPLEMENTATION_SHARED_LIVERANGE_HPP | |
27 | |
28 #include "memory/memRegion.hpp" | |
29 #include "utilities/copy.hpp" | |
30 | |
0 | 31 // This is a shared helper class used during phase 3 and 4 to move all the objects |
32 // Dead regions in a Space are linked together to keep track of the live regions | |
33 // so that the live data can be traversed quickly without having to look at each | |
34 // object. | |
35 | |
36 class LiveRange: public MemRegion { | |
37 public: | |
38 LiveRange(HeapWord* bottom, HeapWord* top): MemRegion(bottom, top) {} | |
39 | |
40 void set_end(HeapWord* e) { | |
41 assert(e >= start(), "should be a non-zero range"); | |
42 MemRegion::set_end(e); | |
43 } | |
44 void set_word_size(size_t ws) { | |
45 assert(ws >= 0, "should be a non-zero range"); | |
46 MemRegion::set_word_size(ws); | |
47 } | |
48 | |
49 LiveRange * next() { return (LiveRange *) end(); } | |
50 | |
51 void move_to(HeapWord* destination) { | |
52 Copy::aligned_conjoint_words(start(), destination, word_size()); | |
53 } | |
54 }; | |
1972 | 55 |
56 #endif // SHARE_VM_GC_IMPLEMENTATION_SHARED_LIVERANGE_HPP |