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/*
* Copyright (C) 2016 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
public class Recurse {
public static int foo(int x, int start, int max, ControlData data) {
bar(x, start, max, data);
return 0;
}
private static long bar(int x, int start, int max, ControlData data) {
baz(x, start, max, data);
return 0;
}
private static Object baz(int x, int start, int max, ControlData data) {
if (x == 0) {
printOrWait(start, max, data);
} else {
foo(x - 1, start, max, data);
}
return null;
}
private static void printOrWait(int start, int max, ControlData data) {
if (data == null) {
PrintThread.print(Thread.currentThread(), start, max);
} else {
if (data.waitFor != null) {
synchronized (data.waitFor) {
data.reached.countDown();
try {
data.waitFor.wait(); // Use wait() as it doesn't have a "hidden" Java call-graph.
} catch (Throwable t) {
throw new RuntimeException(t);
}
}
} else {
data.reached.countDown();
while (!data.stop) {
// Busy-loop.
}
}
}
}
}
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