using System.Collections; namespace System.Reactive.Linq.ObservableImpl { internal abstract class ZipSink<TResult> : IdentitySink<TResult>, IZip { protected readonly object _gate; private readonly ICollection[] _queues; private readonly bool[] _isDone; public ICollection[] Queues => _queues; protected ZipSink(int arity, IObserver<TResult> observer) : base(observer) { _gate = new object(); _isDone = new bool[arity]; _queues = new ICollection[arity]; } public void Next(int index) { bool flag = true; ICollection[] queues = _queues; for (int i = 0; i < queues.Length; i++) { if (queues[i].Count == 0) { flag = false; break; } } if (flag) { TResult result; try { result = GetResult(); } catch (Exception error) { ForwardOnError(error); return; } ForwardOnNext(result); } else { bool flag2 = true; for (int j = 0; j < _isDone.Length; j++) { if (j != index && !_isDone[j]) { flag2 = false; break; } } if (flag2) ForwardOnCompleted(); } } protected abstract TResult GetResult(); public void Fail(Exception error) { ForwardOnError(error); } public void Done(int index) { _isDone[index] = true; bool flag = true; bool[] isDone = _isDone; for (int i = 0; i < isDone.Length; i++) { if (!isDone[i]) { flag = false; break; } } if (flag) ForwardOnCompleted(); } } }