1/*
2 * Copyright (C) 2010 Google Inc.
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17package benchmarks.regression;
18
19import com.google.caliper.Param;
20import java.util.concurrent.atomic.AtomicInteger;
21
22public final class MutableIntBenchmark {
23
24    enum Kind {
25        ARRAY() {
26            int[] value = new int[1];
27
28            @Override void timeCreate(int reps) {
29                for (int i = 0; i < reps; i++) {
30                    value = new int[] { 5 };
31                }
32            }
33            @Override void timeIncrement(int reps) {
34                for (int i = 0; i < reps; i++) {
35                    value[0]++;
36                }
37            }
38            @Override int timeGet(int reps) {
39                int sum = 0;
40                for (int i = 0; i < reps; i++) {
41                    sum += value[0];
42                }
43                return sum;
44            }
45        },
46        ATOMIC() {
47            AtomicInteger value = new AtomicInteger();
48
49            @Override void timeCreate(int reps) {
50                for (int i = 0; i < reps; i++) {
51                    value = new AtomicInteger(5);
52                }
53            }
54            @Override void timeIncrement(int reps) {
55                for (int i = 0; i < reps; i++) {
56                    value.incrementAndGet();
57                }
58            }
59            @Override int timeGet(int reps) {
60                int sum = 0;
61                for (int i = 0; i < reps; i++) {
62                    sum += value.intValue();
63                }
64                return sum;
65            }
66        };
67
68        abstract void timeCreate(int reps);
69        abstract void timeIncrement(int reps);
70        abstract int timeGet(int reps);
71    }
72
73    @Param Kind kind;
74
75    public void timeCreate(int reps) {
76        kind.timeCreate(reps);
77    }
78
79    public void timeIncrement(int reps) {
80        kind.timeIncrement(reps);
81    }
82
83    public void timeGet(int reps) {
84        kind.timeGet(reps);
85    }
86}
87