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// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
#if !NO_PERF
using System;
using System.Diagnostics;
using System.Reactive.Concurrency;
using System.Reactive.Disposables;
using System.Threading;
namespace System.Reactive.Linq.ObservableImpl
{
class TimeInterval<TSource> : Producer<System.Reactive.TimeInterval<TSource>>
{
private readonly IObservable<TSource> _source;
private readonly IScheduler _scheduler;
public TimeInterval(IObservable<TSource> source, IScheduler scheduler)
{
_source = source;
_scheduler = scheduler;
}
protected override IDisposable Run(IObserver<System.Reactive.TimeInterval<TSource>> observer, IDisposable cancel, Action<IDisposable> setSink)
{
var sink = new _(this, observer, cancel);
setSink(sink);
return sink.Run();
}
class _ : Sink<System.Reactive.TimeInterval<TSource>>, IObserver<TSource>
{
private readonly TimeInterval<TSource> _parent;
public _(TimeInterval<TSource> parent, IObserver<System.Reactive.TimeInterval<TSource>> observer, IDisposable cancel)
: base(observer, cancel)
{
_parent = parent;
}
private IStopwatch _watch;
private TimeSpan _last;
public IDisposable Run()
{
_watch = _parent._scheduler.StartStopwatch();
_last = TimeSpan.Zero;
return _parent._source.Subscribe(this);
}
public void OnNext(TSource value)
{
var now = _watch.Elapsed;
var span = now.Subtract(_last);
_last = now;
base._observer.OnNext(new System.Reactive.TimeInterval<TSource>(value, span));
}
public void OnError(Exception error)
{
base._observer.OnError(error);
Dispose();
}
public void OnCompleted()
{
base._observer.OnCompleted();
Dispose();
}
}
}
}
#endif
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