yoo2.2,9

yoo2.2,9

UnityProject/Packages/YooAsset/Runtime/ResourceManager/Operation/UnloadUnusedAssetsOperation.cs

@@ -0,0 +1,80 @@
+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+namespace YooAsset
+{
+    public sealed class UnloadUnusedAssetsOperation : AsyncOperationBase
+    {
+        private enum ESteps
+        {
+            None,
+            UnloadUnused,
+            Done,
+        }
+
+        private readonly ResourceManager _resManager;
+        private ESteps _steps = ESteps.None;
+
+        internal UnloadUnusedAssetsOperation(ResourceManager resourceManager)
+        {
+            _resManager = resourceManager;
+        }
+        internal override void InternalOnStart()
+        {
+            _steps = ESteps.UnloadUnused;
+        }
+        internal override void InternalOnUpdate()
+        {
+            if (_steps == ESteps.None || _steps == ESteps.Done)
+                return;
+
+            if (_steps == ESteps.UnloadUnused)
+            {
+                var loaderDic = _resManager._loaderDic;
+                var removeList = new List<LoadBundleFileOperation>(loaderDic.Count);
+
+                // 注意：优先销毁资源提供者
+                foreach (var loader in loaderDic.Values)
+                {
+                    loader.TryDestroyProviders();
+                }
+
+                // 获取销毁列表
+                foreach (var loader in loaderDic.Values)
+                {
+                    if (loader.CanDestroyLoader())
+                    {
+                        removeList.Add(loader);
+                    }
+                }
+
+                // 销毁文件加载器
+                foreach (var loader in removeList)
+                {
+                    string bundleName = loader.LoadBundleInfo.Bundle.BundleName;
+                    loader.DestroyLoader();
+                    _resManager._loaderDic.Remove(bundleName);
+                }
+
+                // 注意：调用底层接口释放所有资源
+                if (removeList.Count > 0)
+                    Resources.UnloadUnusedAssets();
+
+                _steps = ESteps.Done;
+                Status = EOperationStatus.Succeed;
+            }
+        }
+        internal override void InternalWaitForAsyncComplete()
+        {
+            while (true)
+            {
+                if (ExecuteWhileDone())
+                {
+                    _steps = ESteps.Done;
+                    break;
+                }
+            }
+        }
+    }
+}