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comparison src/share/vm/memory/watermark.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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-1:000000000000 0:a61af66fc99e
1 /*
2 * Copyright 2000-2001 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 water mark points into a space and is used during GC to keep track of
26 // progress.
27
28 class Space;
29
30 class WaterMark VALUE_OBJ_CLASS_SPEC {
31 friend class VMStructs;
32 private:
33 HeapWord* _point;
34 Space* _space;
35 public:
36 // Accessors
37 Space* space() const { return _space; }
38 void set_space(Space* s) { _space = s; }
39 HeapWord* point() const { return _point; }
40 void set_point(HeapWord* p) { _point = p; }
41
42 // Constructors
43 WaterMark(Space* s, HeapWord* p) : _space(s), _point(p) {};
44 WaterMark() : _space(NULL), _point(NULL) {};
45 };
46
47 inline bool operator==(const WaterMark& x, const WaterMark& y) {
48 return (x.point() == y.point()) && (x.space() == y.space());
49 }
50
51 inline bool operator!=(const WaterMark& x, const WaterMark& y) {
52 return !(x == y);
53 }