UniRx 에셋 추가

Gameton-06/Assets/Plugins/UniRx/Scripts/Operators/RefCount.cs

@@ -0,0 +1,77 @@
+using System;
+using UniRx.Operators;
+
+namespace UniRx.Operators
+{
+    internal class RefCountObservable<T> : OperatorObservableBase<T>
+    {
+        readonly IConnectableObservable<T> source;
+        readonly object gate = new object();
+        int refCount = 0;
+        IDisposable connection;
+
+        public RefCountObservable(IConnectableObservable<T> source)
+            : base(source.IsRequiredSubscribeOnCurrentThread())
+        {
+            this.source = source;
+        }
+
+        protected override IDisposable SubscribeCore(IObserver<T> observer, IDisposable cancel)
+        {
+            return new RefCount(this, observer, cancel).Run();
+        }
+
+        class RefCount : OperatorObserverBase<T, T>
+        {
+            readonly RefCountObservable<T> parent;
+
+            public RefCount(RefCountObservable<T> parent, IObserver<T> observer, IDisposable cancel) : base(observer, cancel)
+            {
+                this.parent = parent;
+            }
+
+            public IDisposable Run()
+            {
+                var subcription = parent.source.Subscribe(this);
+
+                lock (parent.gate)
+                {
+                    if (++parent.refCount == 1)
+                    {
+                        parent.connection = parent.source.Connect();
+                    }
+                }
+
+                return Disposable.Create(() =>
+                {
+                    subcription.Dispose();
+
+                    lock (parent.gate)
+                    {
+                        if (--parent.refCount == 0)
+                        {
+                            parent.connection.Dispose();
+                        }
+                    }
+                });
+            }
+
+            public override void OnNext(T value)
+            {
+                base.observer.OnNext(value);
+            }
+
+            public override void OnError(Exception error)
+            {
+                try { observer.OnError(error); }
+                finally { Dispose(); }
+            }
+
+            public override void OnCompleted()
+            {
+                try { observer.OnCompleted(); }
+                finally { Dispose(); }
+            }
+        }
+    }
+}