Mercurial > hg > Members > kono > jpf-core
comparison src/classes/java/util/concurrent/atomic/AtomicLongArray.java @ 0:61d41facf527
initial v8 import (history reset)
author | Peter Mehlitz <Peter.C.Mehlitz@nasa.gov> |
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date | Fri, 23 Jan 2015 10:14:01 -0800 |
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-1:000000000000 | 0:61d41facf527 |
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1 /* | |
2 * Copyright (C) 2014, United States Government, as represented by the | |
3 * Administrator of the National Aeronautics and Space Administration. | |
4 * All rights reserved. | |
5 * | |
6 * The Java Pathfinder core (jpf-core) platform is licensed under the | |
7 * Apache License, Version 2.0 (the "License"); you may not use this file except | |
8 * in compliance with the License. You may obtain a copy of the License at | |
9 * | |
10 * http://www.apache.org/licenses/LICENSE-2.0. | |
11 * | |
12 * Unless required by applicable law or agreed to in writing, software | |
13 * distributed under the License is distributed on an "AS IS" BASIS, | |
14 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
15 * See the License for the specific language governing permissions and | |
16 * limitations under the License. | |
17 */ | |
18 | |
19 package java.util.concurrent.atomic; | |
20 | |
21 import java.io.Serializable; | |
22 import java.util.Arrays; | |
23 | |
24 /** | |
25 * model class for AtomicLongArray | |
26 */ | |
27 public class AtomicLongArray implements Serializable { | |
28 private static final long serialVersionUID = -2308431214976778248L; | |
29 | |
30 private final long[] array; | |
31 | |
32 public AtomicLongArray(int length) { | |
33 array = new long[length]; | |
34 // <2do> need a volatile write in order to conform to JMM // Does this really matter in JPF? | |
35 } | |
36 | |
37 public AtomicLongArray(long[] array) { | |
38 if (array == null) | |
39 throw new NullPointerException(); | |
40 | |
41 int length = array.length; | |
42 this.array = new long[length]; | |
43 | |
44 for (int i = 0; i < length; ++i) | |
45 this.array[i] = array[i]; | |
46 | |
47 // <2do> need a volatile write in order to conform to JMM // Does this really matter in JPF? | |
48 } | |
49 | |
50 public final int length() { | |
51 return(array.length); | |
52 } | |
53 | |
54 public final long get(int i) { | |
55 checkIndex(i); | |
56 return(getNative(i)); | |
57 } | |
58 | |
59 private final native long getNative(int i); | |
60 | |
61 public final boolean compareAndSet(int i, long expect, long update) { | |
62 checkIndex(i); | |
63 return(compareAndSetNative(i, expect, update)); | |
64 } | |
65 | |
66 private final native boolean compareAndSetNative(int i, long expect, long update); | |
67 | |
68 public final boolean weakCompareAndSet(int i, long expect, long update) { | |
69 return(compareAndSet(i, expect, update)); | |
70 } | |
71 | |
72 public final long getAndSet(int i, long newValue) { | |
73 while (true) { | |
74 long current = get(i); | |
75 if (compareAndSet(i, current, newValue)) | |
76 return(current); | |
77 } | |
78 } | |
79 | |
80 public final void set(int i, long newValue) { | |
81 getAndSet(i, newValue); | |
82 } | |
83 | |
84 public final void lazySet(int i, long newValue) { | |
85 set(i, newValue); | |
86 } | |
87 | |
88 public final long getAndIncrement(int i) { | |
89 return(getAndAdd(i, 1)); | |
90 } | |
91 | |
92 public final long getAndDecrement(int i) { | |
93 return(getAndAdd(i, -1)); | |
94 } | |
95 | |
96 public final long getAndAdd(int i, long delta) { | |
97 while (true) { | |
98 long current = get(i); | |
99 long next = current + delta; | |
100 if (compareAndSet(i, current, next)) | |
101 return(current); | |
102 } | |
103 } | |
104 | |
105 public final long incrementAndGet(int i) { | |
106 return(getAndIncrement(i) + 1); | |
107 } | |
108 | |
109 public final long decrementAndGet(int i) { | |
110 return(getAndDecrement(i) - 1); | |
111 } | |
112 | |
113 public final long addAndGet(int i, long delta) { | |
114 return(getAndAdd(i, delta) + delta); | |
115 } | |
116 | |
117 @Override | |
118 public String toString() { | |
119 // <2do> need a volatile read in order to conform to JMM // Does this really matter in JPF? | |
120 return(Arrays.toString(array)); | |
121 } | |
122 | |
123 private void checkIndex(int i) { | |
124 if (i < 0 || i >= array.length) | |
125 throw new IndexOutOfBoundsException("index " + i); | |
126 } | |
127 } |