refactor : 重构异步操作模块

Assets/YooAsset/Runtime/OperationSystem/AsyncOperationBase.cs

@@ -155,9 +155,19 @@ namespace YooAsset
             if (_childs == null)
                 _childs = new List<AsyncOperationBase>(10);
 
-#if UNITY_EDITOR
+#if UNITY_EDITOR || DEBUG
+            if (child == null)
+                throw new YooInternalException("The child node is null !");
+
+            if (ReferenceEquals(child, this))
+                throw new YooInternalException("The child node cannot be itself !");
+
             if (_childs.Contains(child))
                 throw new YooInternalException($"The child node {child.GetType().Name} already exists !");
+
+            // 禁止形成环依赖
+            if (WouldCreateCycle(child))
+                throw new YooInternalException($"AddChildOperation would create a cycle : {this.GetType().Name} -> {child.GetType().Name}");
 #endif
 
             _childs.Add(child);
@@ -171,7 +181,10 @@ namespace YooAsset
             if (_childs == null)
                 return;
 
-#if UNITY_EDITOR
+#if UNITY_EDITOR || DEBUG
+            if (child == null)
+                throw new YooInternalException("The child node is null !");
+
             if (_childs.Contains(child) == false)
                 throw new YooInternalException($"The child node {child.GetType().Name} not exists !");
 #endif
@@ -349,10 +362,10 @@ namespace YooAsset
             if (IsWaitForAsyncComplete == false)
             {
                 IsWaitForAsyncComplete = true;
-                
+
                 if (IsDone == false)
                     InternalWaitForAsyncComplete();
-                
+
                 if (IsDone == false)
                 {
                     Status = EOperationStatus.Failed;
@@ -415,6 +428,39 @@ namespace YooAsset
             float s = UnityEngine.Mathf.FloorToInt(spawnTime - m * 60f - h * 3600f);
             return h.ToString("00") + ":" + m.ToString("00") + ":" + s.ToString("00");
         }
+        private bool WouldCreateCycle(AsyncOperationBase child)
+        {
+            const int maxVisited = 4096;
+            var stack = new Stack<AsyncOperationBase>();
+            var visited = new HashSet<AsyncOperationBase>();
+            stack.Push(child);
+
+            while (stack.Count > 0)
+            {
+                var node = stack.Pop();
+                if (node == null)
+                    continue;
+
+                if (visited.Add(node) == false)
+                    continue;
+
+                if (visited.Count > maxVisited)
+                    throw new YooInternalException("Child operation graph is too large, cycle check aborted !");
+
+                if (ReferenceEquals(node, this))
+                    return true;
+
+                if (node._childs == null)
+                    continue;
+
+                for (int i = 0; i < node._childs.Count; i++)
+                {
+                    stack.Push(node._childs[i]);
+                }
+            }
+
+            return false;
+        }
 
         internal DebugOperationInfo GetDebugOperationInfo()
         {

Assets/YooAsset/Runtime/OperationSystem/OperationSystem.cs

@@ -97,6 +97,8 @@ namespace YooAsset
         /// </summary>
         public static void DestroyAll()
         {
+            YooLogger.Log("Operation system destroy all !");
+
             // 清空所有调度器
             foreach (var scheduler in _schedulerList)
             {
@@ -177,7 +179,7 @@ namespace YooAsset
             }
 
             // 严格模式：非默认包裹必须先创建调度器
-            throw new YooInternalException($"Package scheduler not found: {packageName}. Please call YooAssets.CreatePackage() first!");
+            throw new YooInternalException($"Operation scheduler not found: {packageName}. Please call YooAssets.CreatePackage() first!");
         }
 
         #region 调试信息

Assets/YooAsset/Runtime/YooAssets.cs

@@ -59,6 +59,7 @@ namespace YooAsset
                 _driver.AddComponent<RemoteDebuggerInRuntime>();
 #endif
 
+                // 初始化异步操作系统
                 OperationSystem.Initialize();
             }
         }
@@ -75,8 +76,8 @@ namespace YooAsset
                 if (_driver != null)
                     GameObject.Destroy(_driver);
 
-                // 终止并清空所有包裹的异步操作
-                ClearAllPackageOperation();
+                // 销毁异步操作系统
+                OperationSystem.DestroyAll();
 
                 // 卸载所有AssetBundle
                 AssetBundle.UnloadAllAssetBundles(true);
@@ -97,18 +98,6 @@ namespace YooAsset
             }
         }
 
-        /// <summary>
-        /// 终止并清空所有包裹的异步操作
-        /// </summary>
-        internal static void ClearAllPackageOperation()
-        {
-            foreach (var package in _packages)
-            {
-                OperationSystem.ClearPackageOperation(package.PackageName);
-            }
-            OperationSystem.DestroyAll();
-        }
-
         /// <summary>
         /// 创建资源包裹
         /// </summary>

Assets/YooAsset/Runtime/YooAssetsDriver.cs

@@ -25,7 +25,7 @@ namespace YooAsset
         void OnApplicationQuit()
         {
             // 说明：在编辑器下确保播放被停止时IO类操作被终止。
-            YooAssets.ClearAllPackageOperation();
+            YooAssets.Destroy();
         }
 #endif