0
|
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 }
|