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
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24 
25 #ifndef SHARE_GC_SHENANDOAH_SHENANDOAHOLDGC_HPP
26 #define SHARE_GC_SHENANDOAH_SHENANDOAHOLDGC_HPP
27 
28 #include "gc/shared/gcCause.hpp"
29 #include "gc/shenandoah/shenandoahConcurrentGC.hpp"
30 #include "gc/shenandoah/shenandoahVerifier.hpp"
31 
32 class ShenandoahGeneration;
33 
34 class ShenandoahOldGC : public ShenandoahConcurrentGC {
35  public:
36   ShenandoahOldGC(ShenandoahGeneration* generation, ShenandoahSharedFlag& allow_preemption);
37   bool collect(GCCause::Cause cause);
38 
39  protected:
40   virtual void op_final_mark();
41 
42  private:
43   ShenandoahHeapRegion** _coalesce_and_fill_region_array;
44 
45   void start_old_evacuations();
46   bool entry_coalesce_and_fill();
47   ShenandoahSharedFlag& _allow_preemption;
48   bool op_coalesce_and_fill();
49   void entry_coalesce_and_fill_message(char *buf, size_t len) const;
50 };
51 
52 
53 #endif //SHARE_GC_SHENANDOAH_SHENANDOAHOLDGC_HPP