新增analysis用于分析游戏缺陷

source/src/Utils/LockUtils.ts

@@ -0,0 +1,51 @@
+const THREAD_ID = `${Math.floor(Math.random() * 1000)}-${Date.now()}`;
+const setItem = egret.localStorage.setItem.bind(localStorage);
+const getItem = egret.localStorage.getItem.bind(localStorage);
+const removeItem = egret.localStorage.removeItem.bind(localStorage);
+
+const nextTick = fn => {
+    setTimeout(fn, 0);
+};
+
+/**
+ * 利用共享区域实现快速锁
+ */
+class LockUtils {
+    private _keyX: string;
+    private _keyY: string;
+    constructor(key){
+        this._keyX = `mutex_key_${key}_X`;
+        this._keyY = `mutex_key_${key}_Y`;
+    }
+
+    public lock(){
+        return new Promise((resolve, reject) => {
+            const fn = () => {
+                setItem(this._keyX, THREAD_ID);
+                if (!getItem(this._keyY) === null){
+                    // restart
+                    nextTick(fn);
+                }
+                setItem(this._keyY, THREAD_ID);
+                if (getItem(this._keyX) !== THREAD_ID){
+                    // delay
+                    setTimeout(()=>{
+                        if (getItem(this._keyY) !== THREAD_ID){
+                            // restart
+                            nextTick(fn);
+                            return;
+                        }
+                        // critical section
+                        resolve();
+                        removeItem(this._keyY);
+                    }, 10);
+                } else {
+                    resolve();
+                    removeItem(this._keyY);
+                }
+            };
+
+            fn();
+        });
+    }
+}