Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/TaskWrapperAsyncResult.cs

@@ -0,0 +1,54 @@
+//------------------------------------------------------------------------------
+// <copyright file="TaskWrapperAsyncResult.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ * Wraps a Task class, optionally overriding the State object (since the Task Asynchronous Pattern doesn't normally use them).
+ * 
+ * Copyright (c) 2010 Microsoft Corporation
+ */
+
+namespace System.Web {
+    using System;
+    using System.Threading;
+    using System.Threading.Tasks;
+
+    internal sealed class TaskWrapperAsyncResult : IAsyncResult {
+
+        private bool _forceCompletedSynchronously;
+
+        internal TaskWrapperAsyncResult(Task task, object asyncState) {
+            Task = task;
+            AsyncState = asyncState;
+        }
+
+        public object AsyncState {
+            get;
+            private set;
+        }
+
+        public WaitHandle AsyncWaitHandle {
+            get { return ((IAsyncResult)Task).AsyncWaitHandle; }
+        }
+
+        public bool CompletedSynchronously {
+            get { return _forceCompletedSynchronously || ((IAsyncResult)Task).CompletedSynchronously; }
+        }
+
+        public bool IsCompleted {
+            get { return ((IAsyncResult)Task).IsCompleted; }
+        }
+
+        internal Task Task {
+            get;
+            private set;
+        }
+
+        internal void ForceCompletedSynchronously() {
+            _forceCompletedSynchronously = true;
+        }
+
+    }
+}