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1 /*
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2 * Copyright 2001-2007 Sun Microsystems, Inc. All Rights Reserved.
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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4 *
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5 * This code is free software; you can redistribute it and/or modify it
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6 * under the terms of the GNU General Public License version 2 only, as
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7 * published by the Free Software Foundation.
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8 *
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9 * This code is distributed in the hope that it will be useful, but WITHOUT
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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12 * version 2 for more details (a copy is included in the LICENSE file that
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13 * accompanied this code).
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14 *
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15 * You should have received a copy of the GNU General Public License version
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16 * 2 along with this work; if not, write to the Free Software Foundation,
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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18 *
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19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
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20 * CA 95054 USA or visit www.sun.com if you need additional information or
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21 * have any questions.
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22 *
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23 */
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24
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25 // The Concurrent Mark GC Thread (could be several in the future).
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26 // This is copied from the Concurrent Mark Sweep GC Thread
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27 // Still under construction.
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28
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29 class ConcurrentMark;
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30
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31 class ConcurrentMarkThread: public ConcurrentGCThread {
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32 friend class VMStructs;
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33
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34 double _vtime_start; // Initial virtual time.
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35 double _vtime_accum; // Accumulated virtual time.
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36
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37 double _vtime_mark_accum;
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38 double _vtime_count_accum;
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39
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40 public:
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41 virtual void run();
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42
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43 private:
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44 ConcurrentMark* _cm;
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45 bool _started;
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46 bool _in_progress;
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47
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48 void sleepBeforeNextCycle();
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49
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50 static SurrogateLockerThread* _slt;
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51
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52 public:
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53 // Constructor
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54 ConcurrentMarkThread(ConcurrentMark* cm);
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55
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56 static void makeSurrogateLockerThread(TRAPS);
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57 static SurrogateLockerThread* slt() { return _slt; }
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58
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59 // Printing
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60 void print();
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61
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62 // Total virtual time so far.
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63 double vtime_accum();
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64 // Marking virtual time so far
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65 double vtime_mark_accum();
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66 // Counting virtual time so far.
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67 double vtime_count_accum() { return _vtime_count_accum; }
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68
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69 ConcurrentMark* cm() { return _cm; }
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70
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71 void set_started() { _started = true; }
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72 void clear_started() { _started = false; }
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73 bool started() { return _started; }
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74
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75 void set_in_progress() { _in_progress = true; }
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76 void clear_in_progress() { _in_progress = false; }
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77 bool in_progress() { return _in_progress; }
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78
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79 // Yield for GC
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80 void yield();
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81
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82 // shutdown
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83 static void stop();
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84 };
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