1 /* 2 * Copyright (c) 2013, 2015, Red Hat, Inc. and/or its affiliates. 3 * 4 * This code is free software; you can redistribute it and/or modify it 5 * under the terms of the GNU General Public License version 2 only, as 6 * published by the Free Software Foundation. 7 * 8 * This code is distributed in the hope that it will be useful, but WITHOUT 9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 11 * version 2 for more details (a copy is included in the LICENSE file that 12 * accompanied this code). 13 * 14 * You should have received a copy of the GNU General Public License version 15 * 2 along with this work; if not, write to the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 17 * 18 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 19 * or visit www.oracle.com if you need additional information or have any 20 * questions. 21 * 22 */ 23 24 #ifndef SHARE_VM_GC_SHENANDOAH_SHENANDOAHCONCURRENTTHREAD_HPP 25 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHCONCURRENTTHREAD_HPP 26 27 #include "gc/shenandoah/shenandoahHeap.hpp" 28 #include "gc/shared/concurrentGCThread.hpp" 29 #include "gc/shared/gcCause.hpp" 30 #include "memory/resourceArea.hpp" 31 32 // For now we just want to have a concurrent marking thread. 33 // Once we have that working we will build a concurrent evacuation thread. 34 35 class ShenandoahConcurrentThread: public ConcurrentGCThread { 36 friend class VMStructs; 37 38 private: 39 Monitor _full_gc_lock; 40 41 public: 42 void run_service(); 43 void stop_service(); 44 45 private: 46 volatile jbyte _do_full_gc; 47 volatile jbyte _graceful_shutdown; 48 GCCause::Cause _full_gc_cause; 49 50 void sleepBeforeNextCycle(); 51 52 bool check_cancellation(); 53 void service_normal_cycle(); 54 void service_fullgc_cycle(); 55 56 public: 57 // Constructor 58 ShenandoahConcurrentThread(); 59 ~ShenandoahConcurrentThread(); 60 61 // Printing 62 void print_on(outputStream* st) const; 63 void print() const; 64 65 void do_full_gc(GCCause::Cause cause); 66 67 bool try_set_full_gc(); 68 void reset_full_gc(); 69 bool is_full_gc(); 70 71 char* name() const { return (char*)"ShenandoahConcurrentThread";} 72 void start(); 73 74 void prepare_for_graceful_shutdown(); 75 bool in_graceful_shutdown(); 76 }; 77 78 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHCONCURRENTTHREAD_HPP