1 files changed, 56 insertions, 0 deletions

diff --git a/Rx.NET/System.Reactive.Linq/Reactive/Linq/Observαble/Timestamp.cs b/Rx.NET/System.Reactive.Linq/Reactive/Linq/Observαble/Timestamp.cs
new file mode 100644
index 0000000..ed54678
--- /dev/null
+++ b/Rx.NET/System.Reactive.Linq/Reactive/Linq/Observαble/Timestamp.cs
@@ -0,0 +1,56 @@
+// 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.Reactive.Concurrency;
+
+namespace System.Reactive.Linq.Observαble
+{
+    class Timestamp<TSource> : Producer<Timestamped<TSource>>
+    {
+        private readonly IObservable<TSource> _source;
+        private readonly IScheduler _scheduler;
+
+        public Timestamp(IObservable<TSource> source, IScheduler scheduler)
+        {
+            _source = source;
+            _scheduler = scheduler;
+        }
+
+        protected override IDisposable Run(IObserver<Timestamped<TSource>> observer, IDisposable cancel, Action<IDisposable> setSink)
+        {
+            var sink = new _(this, observer, cancel);
+            setSink(sink);
+            return _source.SubscribeSafe(sink);
+        }
+
+        class _ : Sink<Timestamped<TSource>>, IObserver<TSource>
+        {
+            private readonly Timestamp<TSource> _parent;
+
+            public _(Timestamp<TSource> parent, IObserver<Timestamped<TSource>> observer, IDisposable cancel)
+                : base(observer, cancel)
+            {
+                _parent = parent;
+            }
+
+            public void OnNext(TSource value)
+            {
+                base._observer.OnNext(new Timestamped<TSource>(value, _parent._scheduler.Now));
+            }
+
+            public void OnError(Exception error)
+            {
+                base._observer.OnError(error);
+                base.Dispose();
+            }
+
+            public void OnCompleted()
+            {
+                base._observer.OnCompleted();
+                base.Dispose();
+            }
+        }
+    }
+}
+#endif
\ No newline at end of file