using System.Collections.Generic; namespace System.Reactive.Linq.ObservableImpl { internal sealed class ZipObserver<T> : SafeObserver<T> { private readonly object _gate; private readonly IZip _parent; private readonly int _index; private readonly Queue<T> _values; public Queue<T> Values => _values; public ZipObserver(object gate, IZip parent, int index) { _gate = gate; _parent = parent; _index = index; _values = new Queue<T>(); } protected override void Dispose(bool disposing) { base.Dispose(disposing); if (disposing) { lock (_gate) { _values.Clear(); } } } public override void OnNext(T value) { lock (_gate) { _values.Enqueue(value); _parent.Next(_index); } } public override void OnError(Exception error) { Dispose(); lock (_gate) { _parent.Fail(error); } } public override void OnCompleted() { base.Dispose(true); lock (_gate) { _parent.Done(_index); } } } }