Thu, 13 Jun 2013 22:02:40 -0700
8014431: cleanup warnings indicated by the -Wunused-value compiler option on linux
Reviewed-by: dholmes, coleenp
Contributed-by: jeremymanson@google.com, calvin.cheung@oracle.com
1 /*
2 * Copyright (c) 2000, 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.
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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23 */
25 #ifndef SHARE_VM_MEMORY_WATERMARK_HPP
26 #define SHARE_VM_MEMORY_WATERMARK_HPP
28 #include "memory/allocation.hpp"
29 #include "utilities/globalDefinitions.hpp"
31 // A water mark points into a space and is used during GC to keep track of
32 // progress.
34 class Space;
36 class WaterMark VALUE_OBJ_CLASS_SPEC {
37 friend class VMStructs;
38 private:
39 HeapWord* _point;
40 Space* _space;
41 public:
42 // Accessors
43 Space* space() const { return _space; }
44 void set_space(Space* s) { _space = s; }
45 HeapWord* point() const { return _point; }
46 void set_point(HeapWord* p) { _point = p; }
48 // Constructors
49 WaterMark(Space* s, HeapWord* p) : _space(s), _point(p) {};
50 WaterMark() : _space(NULL), _point(NULL) {};
51 };
53 inline bool operator==(const WaterMark& x, const WaterMark& y) {
54 return (x.point() == y.point()) && (x.space() == y.space());
55 }
57 inline bool operator!=(const WaterMark& x, const WaterMark& y) {
58 return !(x == y);
59 }
61 #endif // SHARE_VM_MEMORY_WATERMARK_HPP