code: /*
   * Copyright (c) 2016-present, RxJava Contributors.
   *
   * 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 io.reactivex.rxjava3.disposables;
  
  import java.util.concurrent.Future;
  import java.util.concurrent.atomic.AtomicReference;
  
  /**
   * A Disposable container that cancels a {@link Future} instance.
   */
  final class FutureDisposable extends AtomicReference<Future<?>> implements Disposable {
  
      private static final long serialVersionUID = 6545242830671168775L;
  
      private final boolean allowInterrupt;
  
      FutureDisposable(Future<?> run, boolean allowInterrupt) {
          super(run);
          this.allowInterrupt = allowInterrupt;
      }
  
      @Override
      public boolean isDisposed() {
          Future<?> f = get();
          return f == null || f.isDone();
      }
  
      @Override
      public void dispose() {
          Future<?> f = getAndSet(null);
          if (f != null) {
              f.cancel(allowInterrupt);
          }
      }
  }
  