新增 FlowScope Git 包雏形

Packages/com.flowscope.gamecore/Addressables/AddressablesResourceBackend.cs

@@ -0,0 +1,70 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using FlowScope.Resources;
+using UnityEngine.ResourceManagement.AsyncOperations;
+using UnityAddressables = UnityEngine.AddressableAssets.Addressables;
+
+namespace FlowScope.Addressables
+{
+    public sealed class AddressablesResourceBackend : IResourceBackend
+    {
+        public string Name => "Addressables";
+
+        public async Task<T> LoadAsync<T>(string key, CancellationToken cancellationToken)
+            where T : class
+        {
+            cancellationToken.ThrowIfCancellationRequested();
+
+            var handle = UnityAddressables.LoadAssetAsync<T>(key);
+            try
+            {
+                await WaitWithCancellation(handle.Task, cancellationToken);
+            }
+            catch (OperationCanceledException)
+            {
+                UnityAddressables.Release(handle);
+                throw;
+            }
+
+            if (handle.OperationException != null ||
+                handle.Status != AsyncOperationStatus.Succeeded ||
+                handle.Result == null)
+            {
+                var exception = new InvalidOperationException(
+                    $"Failed to load Addressables resource '{key}' as {typeof(T).Name} from backend '{Name}'.",
+                    handle.OperationException);
+                UnityAddressables.Release(handle);
+                throw exception;
+            }
+
+            return handle.Result;
+        }
+
+        public void Release<T>(string key, T asset)
+            where T : class
+        {
+            UnityAddressables.Release(asset);
+        }
+
+        private static async Task WaitWithCancellation(Task task, CancellationToken cancellationToken)
+        {
+            if (!cancellationToken.CanBeCanceled)
+            {
+                await task;
+                return;
+            }
+
+            var cancellation = new TaskCompletionSource<bool>();
+            using (cancellationToken.Register(() => cancellation.TrySetResult(true)))
+            {
+                if (await Task.WhenAny(task, cancellation.Task) == cancellation.Task)
+                {
+                    throw new OperationCanceledException(cancellationToken);
+                }
+            }
+
+            await task;
+        }
+    }
+}