1 /*
2 * Copyright (c) 2001, 2009, Oracle and/or its affiliates. All rights reserved.
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * 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;
76 void set_in_progress() { _in_progress = true; }
77 void clear_in_progress() { _in_progress = false; }
78 bool in_progress() { return _in_progress; }
79
80 // This flag returns true from the moment a marking cycle is
81 // initiated (during the initial-mark pause when started() is set)
82 // to the moment when the cycle completes (just after the next
83 // marking bitmap has been cleared and in_progress() is
84 // cleared). While this flag is true we will not start another cycle
85 // so that cycles do not overlap. We cannot use just in_progress()
86 // as the CM thread might take some time to wake up before noticing
87 // that started() is set and set in_progress().
88 bool during_cycle() { return started() || in_progress(); }
89
90 // Yield for GC
91 void yield();
92
93 // shutdown
94 void stop();
95 };
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1 /*
2 * Copyright (c) 2001, 2010, Oracle and/or its affiliates. All rights reserved.
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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARKTHREAD_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARKTHREAD_HPP
27
28 #include "gc_implementation/shared/concurrentGCThread.hpp"
29
30 // The Concurrent Mark GC Thread (could be several in the future).
31 // This is copied from the Concurrent Mark Sweep GC Thread
32 // Still under construction.
33
34 class ConcurrentMark;
35
36 class ConcurrentMarkThread: public ConcurrentGCThread {
37 friend class VMStructs;
38
39 double _vtime_start; // Initial virtual time.
40 double _vtime_accum; // Accumulated virtual time.
41
42 double _vtime_mark_accum;
43 double _vtime_count_accum;
44
45 public:
46 virtual void run();
47
48 private:
49 ConcurrentMark* _cm;
81 void set_in_progress() { _in_progress = true; }
82 void clear_in_progress() { _in_progress = false; }
83 bool in_progress() { return _in_progress; }
84
85 // This flag returns true from the moment a marking cycle is
86 // initiated (during the initial-mark pause when started() is set)
87 // to the moment when the cycle completes (just after the next
88 // marking bitmap has been cleared and in_progress() is
89 // cleared). While this flag is true we will not start another cycle
90 // so that cycles do not overlap. We cannot use just in_progress()
91 // as the CM thread might take some time to wake up before noticing
92 // that started() is set and set in_progress().
93 bool during_cycle() { return started() || in_progress(); }
94
95 // Yield for GC
96 void yield();
97
98 // shutdown
99 void stop();
100 };
101
102 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARKTHREAD_HPP
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