Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/concurrentMarkThread.hpp @ 1375:e0a1a502e402 jdk7-b91
Added tag jdk7-b90 for changeset 605c9707a766
author | mikejwre |
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date | Thu, 22 Apr 2010 16:54:23 -0700 |
parents | 23b1b27ac76c |
children | c18cbe5936b8 |
rev | line source |
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342 | 1 /* |
844 | 2 * Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved. |
342 | 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 | |
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 | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
21 * have any questions. | |
22 * | |
23 */ | |
24 | |
25 // The Concurrent Mark GC Thread (could be several in the future). | |
26 // This is copied from the Concurrent Mark Sweep GC Thread | |
27 // Still under construction. | |
28 | |
29 class ConcurrentMark; | |
30 | |
31 class ConcurrentMarkThread: public ConcurrentGCThread { | |
32 friend class VMStructs; | |
33 | |
34 double _vtime_start; // Initial virtual time. | |
35 double _vtime_accum; // Accumulated virtual time. | |
36 | |
37 double _vtime_mark_accum; | |
38 double _vtime_count_accum; | |
39 | |
40 public: | |
41 virtual void run(); | |
42 | |
43 private: | |
44 ConcurrentMark* _cm; | |
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45 volatile bool _started; |
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46 volatile bool _in_progress; |
342 | 47 |
48 void sleepBeforeNextCycle(); | |
49 | |
50 static SurrogateLockerThread* _slt; | |
51 | |
52 public: | |
53 // Constructor | |
54 ConcurrentMarkThread(ConcurrentMark* cm); | |
55 | |
56 static void makeSurrogateLockerThread(TRAPS); | |
57 static SurrogateLockerThread* slt() { return _slt; } | |
58 | |
59 // Printing | |
1019 | 60 void print_on(outputStream* st) const; |
61 void print() const; | |
342 | 62 |
63 // Total virtual time so far. | |
64 double vtime_accum(); | |
65 // Marking virtual time so far | |
66 double vtime_mark_accum(); | |
67 // Counting virtual time so far. | |
68 double vtime_count_accum() { return _vtime_count_accum; } | |
69 | |
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70 ConcurrentMark* cm() { return _cm; } |
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71 |
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72 void set_started() { _started = true; } |
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73 void clear_started() { _started = false; } |
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74 bool started() { return _started; } |
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75 |
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76 void set_in_progress() { _in_progress = true; } |
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77 void clear_in_progress() { _in_progress = false; } |
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78 bool in_progress() { return _in_progress; } |
342 | 79 |
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80 // This flag returns true from the moment a marking cycle is |
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81 // initiated (during the initial-mark pause when started() is set) |
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82 // to the moment when the cycle completes (just after the next |
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83 // marking bitmap has been cleared and in_progress() is |
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84 // cleared). While this flag is true we will not start another cycle |
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85 // so that cycles do not overlap. We cannot use just in_progress() |
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86 // as the CM thread might take some time to wake up before noticing |
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87 // that started() is set and set in_progress(). |
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88 bool during_cycle() { return started() || in_progress(); } |
342 | 89 |
90 // Yield for GC | |
91 void yield(); | |
92 | |
93 // shutdown | |
794 | 94 void stop(); |
342 | 95 }; |