mono/mcs/class/corlib/System.Threading.Tasks/TaskConstants_T.cs

//
// TaskConstants_T.cs
//
// Authors:
//    Jérémie Laval <jeremie dot laval at xamarin dot com>
//
// Copyright 2011 Xamarin Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
//

#if NET_4_5 || MOBILE
using System;
using System.Runtime.CompilerServices;

namespace System.Threading.Tasks
{
	internal class TaskConstants<T>
	{
		internal static readonly Task<T> Canceled;

		static TaskConstants ()
		{
			var tcs = new TaskCompletionSource<T> ();
			tcs.SetCanceled ();
			Canceled = tcs.Task;
		}
	}
}

#endif