67 lines
2.5 KiB
C#
67 lines
2.5 KiB
C#
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/* ****************************************************************************
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*
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* Copyright (c) Microsoft Corporation.
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*
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* This source code is subject to terms and conditions of the Apache License, Version 2.0. A
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* copy of the license can be found in the License.html file at the root of this distribution. If
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* you cannot locate the Apache License, Version 2.0, please send an email to
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* vspython@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
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* by the terms of the Apache License, Version 2.0.
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*
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* You must not remove this notice, or any other, from this software.
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*
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* ***************************************************************************/
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using System;
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using System.ComponentModel;
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using System.Threading;
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using System.Threading.Tasks;
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namespace Microsoft.VisualStudio.Project {
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/// <summary>
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/// Implements ISynchronizeInvoke in terms of System.Threading.Tasks.Task.
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///
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/// This class will handle marshalling calls back onto the UI thread for us.
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/// </summary>
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public class UIThreadSynchronizer : ISynchronizeInvoke {
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private readonly TaskScheduler _scheduler;
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private readonly Thread _thread;
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/// <summary>
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/// Creates a new UIThreadSynchronizer which will invoke callbacks within the
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/// current synchronization context.
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/// </summary>
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public UIThreadSynchronizer()
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: this(TaskScheduler.FromCurrentSynchronizationContext(), Thread.CurrentThread) {
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}
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public UIThreadSynchronizer(TaskScheduler scheduler, Thread target) {
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_scheduler = scheduler;
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_thread = target;
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}
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#region ISynchronizeInvoke Members
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public IAsyncResult BeginInvoke(Delegate method, object[] args) {
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return Task.Factory.StartNew(() => method.DynamicInvoke(args), default(System.Threading.CancellationToken), TaskCreationOptions.None, _scheduler);
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}
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public object EndInvoke(IAsyncResult result) {
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return ((Task<object>)result).Result;
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}
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public object Invoke(Delegate method, object[] args) {
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var task = Task.Factory.StartNew(() => method.DynamicInvoke(args), default(System.Threading.CancellationToken), TaskCreationOptions.None, _scheduler);
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task.Wait();
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return task.Result;
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}
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public bool InvokeRequired {
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get { return Thread.CurrentThread != _thread; }
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}
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#endregion
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}
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}
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