author | stefank |
Wed, 10 Apr 2013 14:26:49 +0200 | |
changeset 16685 | 41c34debcde0 |
parent 11583 | 83a7383de44c |
child 24094 | 5dbf1f44de18 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2001, 2012, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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#ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARKTHREAD_HPP |
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#define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARKTHREAD_HPP |
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#include "gc_implementation/shared/concurrentGCThread.hpp" |
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// The Concurrent Mark GC Thread (could be several in the future). |
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// This is copied from the Concurrent Mark Sweep GC Thread |
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// Still under construction. |
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class ConcurrentMark; |
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class ConcurrentMarkThread: public ConcurrentGCThread { |
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friend class VMStructs; |
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double _vtime_start; // Initial virtual time. |
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double _vtime_accum; // Accumulated virtual time. |
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double _vtime_mark_accum; |
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public: |
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virtual void run(); |
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private: |
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ConcurrentMark* _cm; |
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volatile bool _started; |
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volatile bool _in_progress; |
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void sleepBeforeNextCycle(); |
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static SurrogateLockerThread* _slt; |
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public: |
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// Constructor |
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ConcurrentMarkThread(ConcurrentMark* cm); |
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static void makeSurrogateLockerThread(TRAPS); |
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static SurrogateLockerThread* slt() { return _slt; } |
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// Printing |
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void print_on(outputStream* st) const; |
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void print() const; |
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// Total virtual time so far. |
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double vtime_accum(); |
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// Marking virtual time so far |
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double vtime_mark_accum(); |
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ConcurrentMark* cm() { return _cm; } |
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void set_started() { assert(!_in_progress, "cycle in progress"); _started = true; } |
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void clear_started() { assert(_in_progress, "must be starting a cycle"); _started = false; } |
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bool started() { return _started; } |
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void set_in_progress() { assert(_started, "must be starting a cycle"); _in_progress = true; } |
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void clear_in_progress() { assert(!_started, "must not be starting a new cycle"); _in_progress = false; } |
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bool in_progress() { return _in_progress; } |
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// This flag returns true from the moment a marking cycle is |
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// initiated (during the initial-mark pause when started() is set) |
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// to the moment when the cycle completes (just after the next |
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// marking bitmap has been cleared and in_progress() is |
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// cleared). While this flag is true we will not start another cycle |
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// so that cycles do not overlap. We cannot use just in_progress() |
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// as the CM thread might take some time to wake up before noticing |
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// that started() is set and set in_progress(). |
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bool during_cycle() { return started() || in_progress(); } |
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// Yield for GC |
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void yield(); |
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// shutdown |
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void stop(); |
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}; |
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#endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARKTHREAD_HPP |