1 /*
 2  * Copyright (c) 2021, Amazon.com, Inc. 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_SHENANDOAH_SHENANDOAHYOUNGGENERATION_HPP
26 #define SHARE_VM_GC_SHENANDOAH_SHENANDOAHYOUNGGENERATION_HPP
27 
28 #include "gc/shenandoah/shenandoahGeneration.hpp"
29 
30 class ShenandoahYoungGeneration : public ShenandoahGeneration {
31 private:
32   ShenandoahObjToScanQueueSet* _old_gen_task_queues;
33 
34 public:
35   ShenandoahYoungGeneration(uint max_queues, size_t max_capacity, size_t max_soft_capacity);
36 
37   const char* name() const override;
38 
39   void set_concurrent_mark_in_progress(bool in_progress) override;
40   void parallel_heap_region_iterate(ShenandoahHeapRegionClosure* cl) override;
41 
42   void heap_region_iterate(ShenandoahHeapRegionClosure* cl) override;
43 
44   bool contains(ShenandoahHeapRegion* region) const override;
45   bool contains(oop obj) const override;
46 
47   void set_old_gen_task_queues(ShenandoahObjToScanQueueSet* old_gen_queues) {
48     _old_gen_task_queues = old_gen_queues;
49   }
50 
51   ShenandoahObjToScanQueueSet* old_gen_task_queues() const override {
52     return _old_gen_task_queues;
53   }
54 
55   void reserve_task_queues(uint workers) override;
56 
57   virtual ShenandoahHeuristics* initialize_heuristics(ShenandoahMode* gc_mode) override;
58 
59 protected:
60   bool is_concurrent_mark_in_progress() override;
61 
62 };
63 
64 #endif // SHARE_VM_GC_SHENANDOAH_SHENANDOAHYOUNGGENERATION_HPP