[+] 接入ET8服务端

[+] 接入ET8服务端

Assets/GameScripts/ThirdParty/ETTask/ETCancellationToken.cs

@@ -0,0 +1,54 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+
+namespace ET
+{
+    public class ETCancellationToken
+    {
+        private HashSet<Action> actions = new HashSet<Action>();
+
+        public void Add(Action callback)
+        {
+            // 如果action是null，绝对不能添加,要抛异常，说明有协程泄漏
+            this.actions.Add(callback);
+        }
+        
+        public void Remove(Action callback)
+        {
+            this.actions?.Remove(callback);
+        }
+
+        public bool IsDispose()
+        {
+            return this.actions == null;
+        }
+
+        public void Cancel()
+        {
+            if (this.actions == null)
+            {
+                return;
+            }
+
+            this.Invoke();
+        }
+
+        private void Invoke()
+        {
+            HashSet<Action> runActions = this.actions;
+            this.actions = null;
+            try
+            {
+                foreach (Action action in runActions)
+                {
+                    action.Invoke();
+                }
+            }
+            catch (Exception e)
+            {
+                ETTask.ExceptionHandler.Invoke(e);
+            }
+        }
+    }
+}