2 // SynchronizationContextScheduler.cs
5 // Jérémie "Garuma" Laval <jeremie.laval@gmail.com>
7 // Copyright (c) 2011 Novell
9 // Permission is hereby granted, free of charge, to any person obtaining a copy
10 // of this software and associated documentation files (the "Software"), to deal
11 // in the Software without restriction, including without limitation the rights
12 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 // copies of the Software, and to permit persons to whom the Software is
14 // furnished to do so, subject to the following conditions:
16 // The above copyright notice and this permission notice shall be included in
17 // all copies or substantial portions of the Software.
19 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
30 using System.Threading;
32 namespace System.Threading.Tasks
34 sealed class SynchronizationContextScheduler : TaskScheduler
36 readonly SynchronizationContext ctx;
37 readonly SendOrPostCallback callback;
39 public SynchronizationContextScheduler (SynchronizationContext ctx)
42 this.callback = TaskLaunchWrapper;
45 protected internal override void QueueTask (Task task)
47 ctx.Post (callback, task);
50 void TaskLaunchWrapper (object obj)
52 TryExecuteTask ((Task)obj);
55 protected override System.Collections.Generic.IEnumerable<Task> GetScheduledTasks ()
57 throw new System.NotImplementedException();
60 protected internal override bool TryDequeue (Task task)
65 protected override bool TryExecuteTaskInline (Task task, bool taskWasPreviouslyQueued)
67 ctx.Send (callback, task);
71 public override int MaximumConcurrencyLevel {
73 return base.MaximumConcurrencyLevel;