83 lines
2.3 KiB
C#
83 lines
2.3 KiB
C#
//
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// TpScheduler.cs
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//
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// Authors:
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// Jérémie Laval <jeremie dot laval at xamarin dot com>
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// Marek Safar <marek.safar@gmail.com>
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//
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// Copyright (c) 2011 Jérémie "Garuma" Laval
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// Copyright 2012 Xamarin Inc (http://www.xamarin.com).
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//
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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//
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//
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#if NET_4_0
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using System.Collections.Generic;
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namespace System.Threading.Tasks
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{
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sealed class TpScheduler: TaskScheduler
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{
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static readonly WaitCallback callback = TaskExecuterCallback;
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protected internal override void QueueTask (Task task)
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{
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if ((task.CreationOptions & TaskCreationOptions.LongRunning) != 0) {
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var thread = new Thread (l => ((Task)l).Execute ()) {
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IsBackground = true
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};
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thread.Start (task);
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return;
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}
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ThreadPool.QueueWorkItem (callback, task);
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}
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static void TaskExecuterCallback (object obj)
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{
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Task task = (Task)obj;
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task.Execute ();
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}
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protected override IEnumerable<Task> GetScheduledTasks ()
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{
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throw new NotImplementedException();
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}
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[MonoTODO ("Tasks cannot be dequeued")]
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protected internal override bool TryDequeue (Task task)
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{
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return false;
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}
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protected override bool TryExecuteTaskInline (Task task, bool taskWasPreviouslyQueued)
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{
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if (taskWasPreviouslyQueued && !TryDequeue (task))
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return false;
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return TryExecuteTask (task);
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}
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}
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}
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#endif
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