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