1 /* 2 * Copyright (c) 2017, 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_SHENANDOAHPARTIALGC_HPP 25 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHPARTIALGC_HPP 26 27 #include "memory/allocation.hpp" 28 #include "gc/shenandoah/shenandoahTaskqueue.hpp" 29 30 class Thread; 31 class ShenandoahHeapRegionSet; 32 class ShenandoahHeap; 33 34 class ShenandoahPartialGC : public CHeapObj<mtGC> { 35 private: 36 ShenandoahHeapRegionSet* _root_regions; 37 ShenandoahHeap* _heap; 38 ShenandoahConnectionMatrix* _matrix; 39 ShenandoahObjToScanQueueSet* _task_queues; 40 size_t* from_idxs; 41 ShenandoahSharedFlag _has_work; 42 43 void set_has_work(bool value); 44 45 public: 46 ShenandoahPartialGC(ShenandoahHeap* heap, size_t num_regions); 47 ~ShenandoahPartialGC(); 48 49 bool has_work(); 50 51 void reset(); 52 bool prepare(); 53 void init_partial_collection(); 54 void concurrent_partial_collection(); 55 void final_partial_collection(); 56 57 template <class T, bool UPDATE_MATRIX> 58 void process_oop(T* p, Thread* thread, ShenandoahObjToScanQueue* queue); 59 60 template <bool DO_SATB> 61 void main_loop(uint worker_id, ParallelTaskTerminator* terminator); 62 63 bool check_and_handle_cancelled_gc(ParallelTaskTerminator* terminator); 64 65 ShenandoahObjToScanQueueSet* task_queues(); 66 }; 67 68 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHPARTIALGC_HPP