Window<TSource, TWindowClosing>
using System.Reactive.Concurrency;
using System.Reactive.Disposables;
using System.Reactive.Subjects;
using System.Runtime.CompilerServices;
namespace System.Reactive.Linq.ObservableImpl
{
    [System.Runtime.CompilerServices.NullableContext(1)]
    [System.Runtime.CompilerServices.Nullable(0)]
    internal static class Window<[System.Runtime.CompilerServices.Nullable(2)] TSource, [System.Runtime.CompilerServices.Nullable(2)] TWindowClosing>
    {
        [System.Runtime.CompilerServices.Nullable(new byte[] {
            0,
            1,
            1,
            1,
            0,
            0
        })]
        internal sealed class Selector : Producer<IObservable<TSource>, Selector._>
        {
            [System.Runtime.CompilerServices.Nullable(new byte[] {
                0,
                1,
                1,
                1
            })]
            internal sealed class _ : Sink<TSource, IObservable<TSource>>
            {
                [System.Runtime.CompilerServices.Nullable(new byte[] {
                    0,
                    1
                })]
                private sealed class WindowClosingObserver : SafeObserver<TWindowClosing>
                {
                    [System.Runtime.CompilerServices.Nullable(new byte[] {
                        1,
                        0,
                        0
                    })]
                    private readonly _ _parent;
                    public WindowClosingObserver([System.Runtime.CompilerServices.Nullable(new byte[] {
                        1,
                        0,
                        0
                    })] _ parent)
                    {
                        _parent = parent;
                    }
                    public override void OnNext(TWindowClosing value)
                    {
                        _parent.CloseWindow(this);
                    }
                    public override void OnError(Exception error)
                    {
                        _parent.OnError(error);
                    }
                    public override void OnCompleted()
                    {
                        _parent.CloseWindow(this);
                    }
                }
                private readonly object _gate = new object();
                private readonly AsyncLock _windowGate = new AsyncLock();
                private readonly SerialDisposable _m = new SerialDisposable();
                private readonly Func<IObservable<TWindowClosing>> _windowClosingSelector;
                private Subject<TSource> _window;
                [System.Runtime.CompilerServices.Nullable(2)]
                private RefCountDisposable _refCountDisposable;
                public _([System.Runtime.CompilerServices.Nullable(new byte[] {
                    1,
                    0,
                    0
                })] Selector parent, IObserver<IObservable<TSource>> observer)
                    : base(observer)
                {
                    _windowClosingSelector = parent._windowClosingSelector;
                    _window = new Subject<TSource>();
                }
                public override void Run(IObservable<TSource> source)
                {
                    CompositeDisposable compositeDisposable = new CompositeDisposable(2) {
                        _m
                    };
                    _refCountDisposable = new RefCountDisposable(compositeDisposable);
                    NextWindow();
                    compositeDisposable.Add(ObservableExtensions.SubscribeSafe<TSource>(source, (IObserver<TSource>)this));
                    _windowGate.Wait<_>(this, (Action<_>)delegate(_ this) {
                        this.CreateWindowClose();
                    });
                    SetUpstream(_refCountDisposable);
                }
                private void NextWindow()
                {
                    WindowObservable<TSource> value = new WindowObservable<TSource>(_window, _refCountDisposable);
                    ForwardOnNext(value);
                }
                private void CreateWindowClose()
                {
                    IObservable<TWindowClosing> source;
                    try {
                        source = _windowClosingSelector();
                    } catch (Exception error) {
                        lock (_gate) {
                            ForwardOnError(error);
                        }
                        return;
                    }
                    WindowClosingObserver windowClosingObserver = new WindowClosingObserver(this);
                    _m.Disposable = windowClosingObserver;
                    windowClosingObserver.SetResource(ObservableExtensions.SubscribeSafe<TWindowClosing>(source, (IObserver<TWindowClosing>)windowClosingObserver));
                }
                private void CloseWindow(IDisposable closingSubscription)
                {
                    closingSubscription.Dispose();
                    lock (_gate) {
                        _window.OnCompleted();
                        _window = new Subject<TSource>();
                        NextWindow();
                    }
                    _windowGate.Wait<_>(this, (Action<_>)delegate(_ this) {
                        this.CreateWindowClose();
                    });
                }
                public override void OnNext(TSource value)
                {
                    lock (_gate) {
                        _window.OnNext(value);
                    }
                }
                public override void OnError(Exception error)
                {
                    lock (_gate) {
                        _window.OnError(error);
                        ForwardOnError(error);
                    }
                }
                public override void OnCompleted()
                {
                    lock (_gate) {
                        _window.OnCompleted();
                        ForwardOnCompleted();
                    }
                }
            }
            private readonly IObservable<TSource> _source;
            private readonly Func<IObservable<TWindowClosing>> _windowClosingSelector;
            public Selector(IObservable<TSource> source, Func<IObservable<TWindowClosing>> windowClosingSelector)
            {
                _source = source;
                _windowClosingSelector = windowClosingSelector;
            }
            [return: System.Runtime.CompilerServices.Nullable(new byte[] {
                1,
                0,
                0
            })]
            protected override _ CreateSink(IObserver<IObservable<TSource>> observer)
            {
                return new _(this, observer);
            }
            protected override void Run([System.Runtime.CompilerServices.Nullable(new byte[] {
                1,
                0,
                0
            })] _ sink)
            {
                sink.Run(_source);
            }
        }
        [System.Runtime.CompilerServices.Nullable(new byte[] {
            0,
            1,
            1,
            1,
            0,
            0
        })]
        internal sealed class Boundaries : Producer<IObservable<TSource>, Boundaries._>
        {
            [System.Runtime.CompilerServices.Nullable(new byte[] {
                0,
                1,
                1,
                1
            })]
            internal sealed class _ : Sink<TSource, IObservable<TSource>>
            {
                [System.Runtime.CompilerServices.Nullable(0)]
                private sealed class WindowClosingObserver : IObserver<TWindowClosing>
                {
                    [System.Runtime.CompilerServices.Nullable(new byte[] {
                        1,
                        0,
                        0
                    })]
                    private readonly _ _parent;
                    public WindowClosingObserver([System.Runtime.CompilerServices.Nullable(new byte[] {
                        1,
                        0,
                        0
                    })] _ parent)
                    {
                        _parent = parent;
                    }
                    public void OnNext(TWindowClosing value)
                    {
                        lock (_parent._gate) {
                            _parent._window.OnCompleted();
                            _parent._window = new Subject<TSource>();
                            _parent.NextWindow();
                        }
                    }
                    public void OnError(Exception error)
                    {
                        _parent.OnError(error);
                    }
                    public void OnCompleted()
                    {
                        _parent.OnCompleted();
                    }
                }
                private readonly object _gate = new object();
                private Subject<TSource> _window;
                [System.Runtime.CompilerServices.Nullable(2)]
                private RefCountDisposable _refCountDisposable;
                public _(IObserver<IObservable<TSource>> observer)
                    : base(observer)
                {
                    _window = new Subject<TSource>();
                }
                public void Run([System.Runtime.CompilerServices.Nullable(new byte[] {
                    1,
                    0,
                    0
                })] Boundaries parent)
                {
                    CompositeDisposable compositeDisposable = new CompositeDisposable(2);
                    _refCountDisposable = new RefCountDisposable(compositeDisposable);
                    NextWindow();
                    compositeDisposable.Add(ObservableExtensions.SubscribeSafe<TSource>(parent._source, (IObserver<TSource>)this));
                    compositeDisposable.Add(ObservableExtensions.SubscribeSafe<TWindowClosing>(parent._windowBoundaries, (IObserver<TWindowClosing>)new WindowClosingObserver(this)));
                    SetUpstream(_refCountDisposable);
                }
                private void NextWindow()
                {
                    WindowObservable<TSource> value = new WindowObservable<TSource>(_window, _refCountDisposable);
                    ForwardOnNext(value);
                }
                public override void OnNext(TSource value)
                {
                    lock (_gate) {
                        _window.OnNext(value);
                    }
                }
                public override void OnError(Exception error)
                {
                    lock (_gate) {
                        _window.OnError(error);
                        ForwardOnError(error);
                    }
                }
                public override void OnCompleted()
                {
                    lock (_gate) {
                        _window.OnCompleted();
                        ForwardOnCompleted();
                    }
                }
            }
            private readonly IObservable<TSource> _source;
            private readonly IObservable<TWindowClosing> _windowBoundaries;
            public Boundaries(IObservable<TSource> source, IObservable<TWindowClosing> windowBoundaries)
            {
                _source = source;
                _windowBoundaries = windowBoundaries;
            }
            [return: System.Runtime.CompilerServices.Nullable(new byte[] {
                1,
                0,
                0
            })]
            protected override _ CreateSink(IObserver<IObservable<TSource>> observer)
            {
                return new _(observer);
            }
            protected override void Run([System.Runtime.CompilerServices.Nullable(new byte[] {
                1,
                0,
                0
            })] _ sink)
            {
                sink.Run(this);
            }
        }
    }
}