1 /*
2 * Copyright (c) 2001, 2012, 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
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP
27
28 #include "gc_implementation/shared/mutableSpace.hpp"
29
30 //
31 // A PSMarkSweepDecorator is used to add "ParallelScavenge" style mark sweep operations
32 // to a MutableSpace.
33 //
34
35 class ObjectStartArray;
36
37 class PSMarkSweepDecorator: public CHeapObj<mtGC> {
38 private:
39 static PSMarkSweepDecorator* _destination_decorator;
40
41 protected:
42 MutableSpace* _space;
43 ObjectStartArray* _start_array;
44 HeapWord* _first_dead;
45 HeapWord* _end_of_live;
46 HeapWord* _compaction_top;
47 size_t _allowed_dead_ratio;
48
61 static void set_destination_decorator_tenured();
62 static void advance_destination_decorator();
63 static PSMarkSweepDecorator* destination_decorator();
64
65 // Accessors
66 MutableSpace* space() { return _space; }
67 ObjectStartArray* start_array() { return _start_array; }
68
69 HeapWord* compaction_top() { return _compaction_top; }
70 void set_compaction_top(HeapWord* value) { _compaction_top = value; }
71
72 size_t allowed_dead_ratio() { return _allowed_dead_ratio; }
73 void set_allowed_dead_ratio(size_t value) { _allowed_dead_ratio = value; }
74
75 // Work methods
76 void adjust_pointers();
77 void precompact();
78 void compact(bool mangle_free_space);
79 };
80
81 #endif // SHARE_VM_GC_IMPLEMENTATION_PARALLELSCAVENGE_PSMARKSWEEPDECORATOR_HPP
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1 /*
2 * Copyright (c) 2001, 2015, 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
21 * questions.
22 *
23 */
24
25 #ifndef SHARE_VM_GC_PARALLEL_PSMARKSWEEPDECORATOR_HPP
26 #define SHARE_VM_GC_PARALLEL_PSMARKSWEEPDECORATOR_HPP
27
28 #include "gc/parallel/mutableSpace.hpp"
29
30 //
31 // A PSMarkSweepDecorator is used to add "ParallelScavenge" style mark sweep operations
32 // to a MutableSpace.
33 //
34
35 class ObjectStartArray;
36
37 class PSMarkSweepDecorator: public CHeapObj<mtGC> {
38 private:
39 static PSMarkSweepDecorator* _destination_decorator;
40
41 protected:
42 MutableSpace* _space;
43 ObjectStartArray* _start_array;
44 HeapWord* _first_dead;
45 HeapWord* _end_of_live;
46 HeapWord* _compaction_top;
47 size_t _allowed_dead_ratio;
48
61 static void set_destination_decorator_tenured();
62 static void advance_destination_decorator();
63 static PSMarkSweepDecorator* destination_decorator();
64
65 // Accessors
66 MutableSpace* space() { return _space; }
67 ObjectStartArray* start_array() { return _start_array; }
68
69 HeapWord* compaction_top() { return _compaction_top; }
70 void set_compaction_top(HeapWord* value) { _compaction_top = value; }
71
72 size_t allowed_dead_ratio() { return _allowed_dead_ratio; }
73 void set_allowed_dead_ratio(size_t value) { _allowed_dead_ratio = value; }
74
75 // Work methods
76 void adjust_pointers();
77 void precompact();
78 void compact(bool mangle_free_space);
79 };
80
81 #endif // SHARE_VM_GC_PARALLEL_PSMARKSWEEPDECORATOR_HPP
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