1 /*
2  * Copyright (C) 2016 The Android Open Source Project
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 
17 package art;
18 
19 public class Recurse {
foo(int x, int start, int max, ControlData data)20   public static int foo(int x, int start, int max, ControlData data) {
21     bar(x, start, max, data);
22     return 0;
23   }
24 
bar(int x, int start, int max, ControlData data)25   private static long bar(int x, int start, int max, ControlData data) {
26     baz(x, start, max, data);
27     return 0;
28   }
29 
baz(int x, int start, int max, ControlData data)30   private static Object baz(int x, int start, int max, ControlData data) {
31     if (x == 0) {
32       printOrWait(start, max, data);
33     } else {
34       foo(x - 1, start, max, data);
35     }
36     return null;
37   }
38 
printOrWait(int start, int max, ControlData data)39   private static void printOrWait(int start, int max, ControlData data) {
40     if (data == null) {
41       PrintThread.print(Thread.currentThread(), start, max);
42     } else {
43       if (data.waitFor != null) {
44         synchronized (data.waitFor) {
45           data.reached.countDown();
46           try {
47             data.waitFor.wait();  // Use wait() as it doesn't have a "hidden" Java call-graph.
48           } catch (Throwable t) {
49             throw new RuntimeException(t);
50           }
51         }
52       } else {
53         data.reached.countDown();
54         while (!data.stop) {
55           // Busy-loop.
56         }
57       }
58     }
59   }
60 }