From 1f19f945eceaa30a3259b0117d910db091d739e5 Mon Sep 17 00:00:00 2001
From: Eric Maupin <ermaup@microsoft.com>
Date: Thu, 5 Jul 2018 16:59:24 -0400
Subject: [Tests] Fix AsyncSynchronizationContext

We don't actually need the complicated version of this that seemed
flawed. We just need to provide a context and execute the calls. We may
need to make this more like the original later, but we're generally not
executing things off-thread within our VMs.
---
 .../AsyncSynchronizationContext.cs                 | 113 ++-------------------
 1 file changed, 6 insertions(+), 107 deletions(-)

(limited to 'Xamarin.PropertyEditing.Tests')

diff --git a/Xamarin.PropertyEditing.Tests/AsyncSynchronizationContext.cs b/Xamarin.PropertyEditing.Tests/AsyncSynchronizationContext.cs
index 6109c7d..34a7086 100644
--- a/Xamarin.PropertyEditing.Tests/AsyncSynchronizationContext.cs
+++ b/Xamarin.PropertyEditing.Tests/AsyncSynchronizationContext.cs
@@ -1,118 +1,17 @@
-// Copyright (c) 2004-2013 Charlie Poole
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
-
-using System;
-using System.Collections;
 using System.Threading;
 
-namespace NUnit.Framework.Internal
+namespace Xamarin.PropertyEditing.Tests
 {
-	internal class AsyncSynchronizationContext : SynchronizationContext
+	internal class AsyncSynchronizationContext
+		: SynchronizationContext
 	{
-		private int _operationCount;
-		private readonly AsyncOperationQueue _operations = new AsyncOperationQueue();
-
-		public override void Send(SendOrPostCallback d, object state)
-		{
-			throw new InvalidOperationException("Sending to this synchronization context is not supported");
-		}
-
-		public override void Post(SendOrPostCallback d, object state)
-		{
-			_operations.Enqueue(new AsyncOperation(d, state));
-		}
-
-		public override void OperationStarted()
-		{
-			Interlocked.Increment(ref _operationCount);
-			base.OperationStarted();
-		}
-
-		public override void OperationCompleted()
-		{
-			if (Interlocked.Decrement(ref _operationCount) == 0)
-				_operations.MarkAsComplete();
-
-			base.OperationCompleted();
-		}
-
-		public void WaitForPendingOperationsToComplete()
+		public override void Post (SendOrPostCallback d, object state)
 		{
-			_operations.InvokeAll();
+			d (state);
 		}
 
-		private class AsyncOperationQueue
+		public void WaitForPendingOperationsToComplete ()
 		{
-			private bool _run = true;
-			private readonly Queue _operations = Queue.Synchronized(new Queue());
-			private readonly AutoResetEvent _operationsAvailable = new AutoResetEvent(false);
-
-			public void Enqueue(AsyncOperation asyncOperation)
-			{
-				_operations.Enqueue(asyncOperation);
-				_operationsAvailable.Set();
-			}
-
-			public void MarkAsComplete()
-			{
-				_run = false;
-				_operationsAvailable.Set();
-			}
-
-			public void InvokeAll()
-			{
-				while (_run)
-				{
-					InvokePendingOperations();
-					_operationsAvailable.WaitOne();
-				}
-
-				InvokePendingOperations();
-			}
-
-			private void InvokePendingOperations()
-			{
-				while (_operations.Count > 0)
-				{
-					AsyncOperation operation = (AsyncOperation)_operations.Dequeue();
-					operation.Invoke();
-				}
-			}
-		}
-
-		private class AsyncOperation
-		{
-			private readonly SendOrPostCallback _action;
-			private readonly object _state;
-
-			public AsyncOperation(SendOrPostCallback action, object state)
-			{
-				_action = action;
-				_state = state;
-			}
-
-			public void Invoke()
-			{
-				_action(_state);
-			}
 		}
 	}
 }
\ No newline at end of file
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