1 /*
 2  * Copyright (c) 2017, Oracle and/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_G1_G1FULLGCCOMPACTIONPOINT_HPP
26 #define SHARE_GC_G1_G1FULLGCCOMPACTIONPOINT_HPP
27 
28 #include "memory/allocation.hpp"
29 #include "oops/oopsHierarchy.hpp"
30 #include "utilities/growableArray.hpp"
31 
32 class HeapRegion;
33 class SlidingForwarding;
34 
35 class G1FullGCCompactionPoint : public CHeapObj<mtGC> {
36   HeapRegion* _current_region;
37   HeapWord*   _threshold;
38   HeapWord*   _compaction_top;
39   GrowableArray<HeapRegion*>* _compaction_regions;
40   GrowableArrayIterator<HeapRegion*> _compaction_region_iterator;
41 
42   bool object_will_fit(size_t size);
43   void initialize_values(bool init_threshold);
44   void switch_region();
45   HeapRegion* next_region();
46 
47 public:
48   G1FullGCCompactionPoint();
49   ~G1FullGCCompactionPoint();
50 
51   bool has_regions();
52   bool is_initialized();
53   void initialize(HeapRegion* hr, bool init_threshold);
54   void update();
55   void forward(SlidingForwarding* const forwarding, oop object, size_t size);
56   void add(HeapRegion* hr);
57 
58   HeapRegion* remove_last();
59   HeapRegion* current_region();
60 
61   GrowableArray<HeapRegion*>* regions();
62 };
63 
64 #endif // SHARE_GC_G1_G1FULLGCCOMPACTIONPOINT_HPP