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.internal.operators.flowable;
  
  import java.util.concurrent.atomic.*;
  
  import org.reactivestreams.*;
  
  import io.reactivex.rxjava3.core.*;
  import io.reactivex.rxjava3.internal.subscriptions.SubscriptionHelper;
  import io.reactivex.rxjava3.internal.util.*;
  import io.reactivex.rxjava3.operators.ConditionalSubscriber;
  
  public final class FlowableSkipUntil<T, U> extends AbstractFlowableWithUpstream<T, T> {
      final Publisher<U> other;
      public FlowableSkipUntil(Flowable<T> source, Publisher<U> other) {
          super(source);
          this.other = other;
      }
  
      @Override
      protected void subscribeActual(Subscriber<? super T> child) {
          SkipUntilMainSubscriber<T> parent = new SkipUntilMainSubscriber<>(child);
          child.onSubscribe(parent);
  
          other.subscribe(parent.other);
  
          source.subscribe(parent);
      }
  
      static final class SkipUntilMainSubscriber<T> extends AtomicInteger
      implements ConditionalSubscriber<T>, Subscription {
          private static final long serialVersionUID = -6270983465606289181L;
  
          final Subscriber<? super T> downstream;
  
          final AtomicReference<Subscription> upstream;
  
          final AtomicLong requested;
  
          final OtherSubscriber other;
  
          final AtomicThrowable error;
  
          volatile boolean gate;
  
          SkipUntilMainSubscriber(Subscriber<? super T> downstream) {
              this.downstream = downstream;
              this.upstream = new AtomicReference<>();
              this.requested = new AtomicLong();
              this.other = new OtherSubscriber();
              this.error = new AtomicThrowable();
          }
  
          @Override
          public void onSubscribe(Subscription s) {
              SubscriptionHelper.deferredSetOnce(this.upstream, requested, s);
          }
  
          @Override
          public void onNext(T t) {
              if (!tryOnNext(t)) {
                  upstream.get().request(1);
              }
          }
  
          @Override
          public boolean tryOnNext(T t) {
              if (gate) {
                  HalfSerializer.onNext(downstream, t, this, error);
                  return true;
              }
              return false;
          }
  
          @Override
          public void onError(Throwable t) {
              SubscriptionHelper.cancel(other);
              HalfSerializer.onError(downstream, t, SkipUntilMainSubscriber.this, error);
          }
  
          @Override
          public void onComplete() {
              SubscriptionHelper.cancel(other);
              HalfSerializer.onComplete(downstream, this, error);
          }
  
          @Override
          public void request(long n) {
              SubscriptionHelper.deferredRequest(upstream, requested, n);
          }
  
          @Override
          public void cancel() {
              SubscriptionHelper.cancel(upstream);
              SubscriptionHelper.cancel(other);
          }
  
          final class OtherSubscriber extends AtomicReference<Subscription>
          implements FlowableSubscriber<Object> {
  
              private static final long serialVersionUID = -5592042965931999169L;
  
              @Override
              public void onSubscribe(Subscription s) {
                  SubscriptionHelper.setOnce(this, s, Long.MAX_VALUE);
              }
  
              @Override
              public void onNext(Object t) {
                  gate = true;
                  get().cancel();
              }
  
              @Override
              public void onError(Throwable t) {
                  SubscriptionHelper.cancel(upstream);
                  HalfSerializer.onError(downstream, t, SkipUntilMainSubscriber.this, error);
              }
  
              @Override
              public void onComplete() {
                  gate = true;
              }
          }
      }
  }
  