Mon, 01 Dec 2008 23:25:24 -0800
6778647: snap(), snap_policy() should be renamed setup(), setup_policy()
Summary: Renamed Reference{Policy,Pocessor} methods from snap{,_policy}() to setup{,_policy}()
Reviewed-by: apetrusenko
1 /*
2 * Copyright 2001-2002 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 //
26 // A PSMarkSweepDecorator is used to add "ParallelScavenge" style mark sweep operations
27 // to a MutableSpace.
28 //
30 class ObjectStartArray;
32 class PSMarkSweepDecorator: public CHeapObj {
33 private:
34 static PSMarkSweepDecorator* _destination_decorator;
36 protected:
37 MutableSpace* _space;
38 ObjectStartArray* _start_array;
39 HeapWord* _first_dead;
40 HeapWord* _end_of_live;
41 HeapWord* _compaction_top;
42 size_t _allowed_dead_ratio;
44 bool insert_deadspace(size_t& allowed_deadspace_words, HeapWord* q,
45 size_t word_len);
47 public:
48 PSMarkSweepDecorator(MutableSpace* space, ObjectStartArray* start_array,
49 size_t allowed_dead_ratio) :
50 _space(space), _start_array(start_array),
51 _allowed_dead_ratio(allowed_dead_ratio) { }
53 // During a compacting collection, we need to collapse objects into
54 // spaces in a given order. We want to fill space A, space B, and so
55 // on. The code that controls that order is in the following methods.
56 static void set_destination_decorator_tenured();
57 static void set_destination_decorator_perm_gen();
58 static void advance_destination_decorator();
59 static PSMarkSweepDecorator* destination_decorator();
61 // Accessors
62 MutableSpace* space() { return _space; }
63 ObjectStartArray* start_array() { return _start_array; }
65 HeapWord* compaction_top() { return _compaction_top; }
66 void set_compaction_top(HeapWord* value) { _compaction_top = value; }
68 size_t allowed_dead_ratio() { return _allowed_dead_ratio; }
69 void set_allowed_dead_ratio(size_t value) { _allowed_dead_ratio = value; }
71 // Work methods
72 void adjust_pointers();
73 void precompact();
74 void compact(bool mangle_free_space);
75 };