Update OperationSystem

Assets/YooAsset/Runtime/OperationSystem/OperationSystem.cs

@@ -1,5 +1,6 @@
 using System.Collections;
 using System.Collections.Generic;
+using System.Diagnostics;
 
 namespace YooAsset
 {
@@ -7,16 +8,33 @@ namespace YooAsset
 	{
 		private static readonly List<AsyncOperationBase> _operations = new List<AsyncOperationBase>(100);
 
-		public static void ProcessOperaiton(AsyncOperationBase operationBase)
+		// 计时器相关
+		private static Stopwatch _watch;	
+		private static long _maxTimeSlice;
+		private static long _frameTime;
+
+
+		/// <summary>
+		/// 初始化异步操作系统
+		/// </summary>
+		public static void Initialize(long maxTimeSlice)
 		{
-			_operations.Add(operationBase);
-			operationBase.Start();
+			_maxTimeSlice = maxTimeSlice;
+			_watch = Stopwatch.StartNew();
 		}
 
+		/// <summary>
+		/// 更新异步操作系统
+		/// </summary>
 		public static void Update()
 		{
+			_frameTime = _watch.ElapsedMilliseconds;
+
 			for (int i = _operations.Count - 1; i >= 0; i--)
 			{
+				if (_watch.ElapsedMilliseconds - _frameTime >= _maxTimeSlice)
+					return;
+
 				_operations[i].Update();
 				if (_operations[i].IsDone)
 				{
@@ -25,5 +43,14 @@ namespace YooAsset
 				}
 			}
 		}
+
+		/// <summary>
+		/// 开始处理异步操作类
+		/// </summary>
+		public static void ProcessOperaiton(AsyncOperationBase operationBase)
+		{
+			_operations.Add(operationBase);
+			operationBase.Start();
+		}
 	}
 }