1 /*
2 * Copyright (c) 2001, 2008, 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 // A FreeBlockDictionary is an abstract superclass that will allow
26 // a number of alternative implementations in the future.
27 class FreeBlockDictionary: public CHeapObj {
28 public:
29 enum Dither {
30 atLeast,
31 exactly,
32 roughly
33 };
34 enum DictionaryChoice {
35 dictionaryBinaryTree = 0,
36 dictionarySplayTree = 1,
37 dictionarySkipList = 2
38 };
39
40 private:
41 NOT_PRODUCT(Mutex* _lock;)
42
43 public:
44 virtual void removeChunk(FreeChunk* fc) = 0;
71
72 NOT_PRODUCT (
73 virtual size_t sumDictReturnedBytes() = 0;
74 virtual void initializeDictReturnedBytes() = 0;
75 virtual size_t totalCount() = 0;
76 )
77
78 virtual void reportStatistics() const {
79 gclog_or_tty->print("No statistics available");
80 }
81
82 virtual void printDictCensus() const = 0;
83 virtual void print_free_lists(outputStream* st) const = 0;
84
85 virtual void verify() const = 0;
86
87 Mutex* par_lock() const PRODUCT_RETURN0;
88 void set_par_lock(Mutex* lock) PRODUCT_RETURN;
89 void verify_par_locked() const PRODUCT_RETURN;
90 };
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1 /*
2 * Copyright (c) 2001, 2010, 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_CONCURRENTMARKSWEEP_FREEBLOCKDICTIONARY_HPP
26 #define SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_FREEBLOCKDICTIONARY_HPP
27
28 #include "gc_implementation/concurrentMarkSweep/freeChunk.hpp"
29 #include "memory/allocation.hpp"
30 #include "memory/memRegion.hpp"
31 #include "runtime/mutex.hpp"
32 #include "utilities/debug.hpp"
33 #include "utilities/globalDefinitions.hpp"
34 #include "utilities/ostream.hpp"
35
36 // A FreeBlockDictionary is an abstract superclass that will allow
37 // a number of alternative implementations in the future.
38 class FreeBlockDictionary: public CHeapObj {
39 public:
40 enum Dither {
41 atLeast,
42 exactly,
43 roughly
44 };
45 enum DictionaryChoice {
46 dictionaryBinaryTree = 0,
47 dictionarySplayTree = 1,
48 dictionarySkipList = 2
49 };
50
51 private:
52 NOT_PRODUCT(Mutex* _lock;)
53
54 public:
55 virtual void removeChunk(FreeChunk* fc) = 0;
82
83 NOT_PRODUCT (
84 virtual size_t sumDictReturnedBytes() = 0;
85 virtual void initializeDictReturnedBytes() = 0;
86 virtual size_t totalCount() = 0;
87 )
88
89 virtual void reportStatistics() const {
90 gclog_or_tty->print("No statistics available");
91 }
92
93 virtual void printDictCensus() const = 0;
94 virtual void print_free_lists(outputStream* st) const = 0;
95
96 virtual void verify() const = 0;
97
98 Mutex* par_lock() const PRODUCT_RETURN0;
99 void set_par_lock(Mutex* lock) PRODUCT_RETURN;
100 void verify_par_locked() const PRODUCT_RETURN;
101 };
102
103 #endif // SHARE_VM_GC_IMPLEMENTATION_CONCURRENTMARKSWEEP_FREEBLOCKDICTIONARY_HPP
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