56 lines
1.9 KiB
C#
56 lines
1.9 KiB
C#
//-----------------------------------------------------------------------------
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//-----------------------------------------------------------------------------
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namespace System.Activities
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{
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using System.Runtime;
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using System.Threading;
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static class SynchronizationContextHelper
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{
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static WFDefaultSynchronizationContext defaultContext;
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public static SynchronizationContext GetDefaultSynchronizationContext()
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{
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if (SynchronizationContextHelper.defaultContext == null)
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{
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SynchronizationContextHelper.defaultContext = new WFDefaultSynchronizationContext();
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}
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return SynchronizationContextHelper.defaultContext;
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}
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public static SynchronizationContext CloneSynchronizationContext(SynchronizationContext context)
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{
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Fx.Assert(context != null, "null context parameter");
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WFDefaultSynchronizationContext wfDefaultContext = context as WFDefaultSynchronizationContext;
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if (wfDefaultContext != null)
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{
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Fx.Assert(SynchronizationContextHelper.defaultContext != null, "We must have set the static member by now!");
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return SynchronizationContextHelper.defaultContext;
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}
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else
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{
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return context.CreateCopy();
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}
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}
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class WFDefaultSynchronizationContext : SynchronizationContext
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{
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public WFDefaultSynchronizationContext()
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{
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}
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public override void Post(SendOrPostCallback d, object state)
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{
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ActionItem.Schedule(delegate(object s) { d(s); }, state);
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}
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public override void Send(SendOrPostCallback d, object state)
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{
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d(state);
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}
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}
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}
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}
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