//
// AsyncOperationManager.cs
//
// Authors:
//	Atsushi Enomoto <atsushi@ximian.com>
//
// Copyright (C) 2006 Novell, 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_2_0
using System.Security.Permissions;
using System.Threading;

namespace System.ComponentModel
{
	public static class AsyncOperationManager
	{
		static readonly SynchronizationContext default_context;
		static SynchronizationContext current_context;

		static AsyncOperationManager ()
		{
			default_context = new SynchronizationContext ();
			current_context = default_context;
		}

		public static SynchronizationContext SynchronizationContext {
			get { return current_context; }
			[SecurityPermission (SecurityAction.LinkDemand)]
			set { current_context = value != null ? value : default_context; }
		}

		public static AsyncOperation CreateOperation (object userSuppliedState)
		{
			return new AsyncOperation (
				current_context, userSuppliedState);
		}
	}
}
#endif