content: /*
   * 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.
   */
  
  package art;
  
  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.
          }
        }
      }
    }
  }