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

// 
// SchedulerProxy.cs
//  
// Author:
//       Jérémie "Garuma" Laval <[email protected]>
// 
// Copyright (c) 2009 Jérémie "Garuma" Laval
// 
// 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_0 || BOOTSTRAP_NET_4_0
using System;

namespace System.Threading.Tasks
{
	
	internal class SchedulerProxy : IScheduler
	{
		TaskScheduler scheduler;
		
		public SchedulerProxy (TaskScheduler scheduler)
		{
			this.scheduler = scheduler;
		}
		
		#region IScheduler implementation
		public void AddWork (Task t)
		{
			scheduler.QueueTask (t);
		}
		
		public void ParticipateUntil (Task task)
		{
			ParticipateUntil (() => task.IsCompleted);
		}
		
		public bool ParticipateUntil (Task task, Func<bool> predicate)
		{
			bool fromPredicate = false;
			
			ParticipateUntil (() => {
				if (predicate ()) {
					fromPredicate = true;
					return true;
				}
				
				return task.IsCompleted;
			});
			
			return fromPredicate;
		}
		
		public void ParticipateUntil (Func<bool> predicate)
		{
			SpinWait sw = new SpinWait ();
			
			while (!predicate ())
				sw.SpinOnce ();
		}
		
		public void PulseAll ()
		{
			
		}
		#endregion

		#region IDisposable implementation
		public void Dispose ()
		{
			scheduler = null;
		}
		#endregion

	}
}
#endif