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comparison src/share/vm/gc_implementation/shared/cSpaceCounters.hpp @ 0:a61af66fc99e jdk7-b24

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author duke
date Sat, 01 Dec 2007 00:00:00 +0000
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children c18cbe5936b8
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1 /*
2 * Copyright 2002-2004 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 */
24
25 // A CSpaceCounters is a holder class for performance counters
26 // that track a space;
27
28 class CSpaceCounters: public CHeapObj {
29 friend class VMStructs;
30
31 private:
32 PerfVariable* _capacity;
33 PerfVariable* _used;
34
35 // Constant PerfData types don't need to retain a reference.
36 // However, it's a good idea to document them here.
37 // PerfConstant* _size;
38
39 ContiguousSpace* _space;
40 char* _name_space;
41
42 public:
43
44 CSpaceCounters(const char* name, int ordinal, size_t max_size,
45 ContiguousSpace* s, GenerationCounters* gc);
46
47 ~CSpaceCounters() {
48 if (_name_space != NULL) FREE_C_HEAP_ARRAY(char, _name_space);
49 }
50
51 inline void update_capacity() {
52 _capacity->set_value(_space->capacity());
53 }
54
55 inline void update_used() {
56 _used->set_value(_space->used());
57 }
58
59 inline void update_all() {
60 update_used();
61 update_capacity();
62 }
63
64 const char* name_space() const { return _name_space; }
65 };
66
67 class ContiguousSpaceUsedHelper : public PerfLongSampleHelper {
68 private:
69 ContiguousSpace* _space;
70
71 public:
72 ContiguousSpaceUsedHelper(ContiguousSpace* space) : _space(space) { }
73
74 inline jlong take_sample() {
75 return _space->used();
76 }
77 };