Init TEngine4.0.0

Init TEngine4.0.0

UnityProject/Packages/YooAsset/Runtime/DownloadSystem/ThreadSyncContext.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Collections;
+using System.Collections.Concurrent;
+using System.Threading;
+
+namespace YooAsset
+{
+	/// <summary>
+	/// 同步其它线程里的回调到主线程里
+	/// 注意：Unity3D中需要设置Scripting Runtime Version为.NET4.6
+	/// </summary>
+	internal sealed class ThreadSyncContext : SynchronizationContext
+	{
+		private readonly ConcurrentQueue<Action> _safeQueue = new ConcurrentQueue<Action>();
+
+		/// <summary>
+		/// 更新同步队列
+		/// </summary>
+		public void Update()
+		{
+			while (true)
+			{
+				if (_safeQueue.TryDequeue(out Action action) == false)
+					return;
+				action.Invoke();
+			}
+		}
+
+		/// <summary>
+		/// 向同步队列里投递一个回调方法
+		/// </summary>
+		public override void Post(SendOrPostCallback callback, object state)
+		{
+			Action action = new Action(() => { callback(state); });
+			_safeQueue.Enqueue(action);
+		}
+	}
+}