[adapters] 增加资源管线的多线程支持

adapters/common/cache-manager-proxy.js

@@ -0,0 +1,144 @@
+const { getUserDataPath, readJsonSync, makeDirSync, writeFileSync, copyFile, downloadFile, writeFile, deleteFile, rmdirSync, unzip, isOutOfStorage } = window.fsUtils;
+
+var cacheManager = {
+
+    // 以下为单向属性，修改会同步到 Worker 中
+    _cacheDir: 'gamecaches',
+    get cacheDir() {
+        return this._cacheDir;
+    },
+    set cacheDir(v) {
+        worker.cacheManager.set_cacheDir([this._cacheDir = v]);
+    },
+
+    _cachedFileName: 'cacheList.json',
+    get cachedFileName() {
+        return this._cachedFileName;
+    },
+    set cachedFileName(v) {
+        worker.cacheManager.set_cachedFileName([this._cachedFileName = v]);
+    },
+
+    _cacheEnabled: true,
+    get cacheEnabled() {
+        return this._cacheEnabled;
+    },
+    set cacheEnabled(v) {
+        worker.cacheManager.set_cacheEnabled([this._cacheEnabled = v]);
+    },
+
+    _autoClear: true,
+    get autoClear() {
+        return this._autoClear;
+    },
+    set autoClear(v) {
+        worker.cacheManager.set_autoClear([this._autoClear = v]);
+    },
+
+    _cacheInterval: 500,
+    get cacheInterval() {
+        return this._cacheInterval;
+    },
+    set cacheInterval(v) {
+        worker.cacheManager.set_cacheInterval([this._cacheInterval = v]);
+    },
+
+    _deleteInterval: 500,
+    get deleteInterval() {
+        return this._deleteInterval;
+    },
+    set deleteInterval(v) {
+        worker.cacheManager.set_deleteInterval([this._deleteInterval = v]);
+    },
+
+    // 以下属性未暴露，仅在 Worker 中保留
+    // writeFileInterval: 2000,
+    // outOfStorage: false,
+    // tempFiles: null,
+    // cacheQueue: {},
+
+    // 以下为只读属性，并且在变动时从 Worker 中同步，需注意 lastTime 可能不是最新的
+    cachedFiles: null,
+
+    // 以下为只读属性
+    version: '1.0',
+
+    // 增加 download 函数以在 Worker 执行下载逻辑
+    download(url, func, options, onFileProgress, onComplete) {
+        // 暂未实现 onFileProgress 回调
+        worker.cacheManager.download(
+            [url, options.reload, options.header, options.cacheEnabled, options.__cacheBundleRoot__],
+            ([errMsg, path]) => {
+                if (errMsg) {
+                    onComplete(new Error(errMsg), null);
+                    return;
+                }
+                func(path, options, (err, data) => {
+                    if (err) {
+                        this.removeCache(url);
+                    }
+                    onComplete(err, data);
+                });
+            },
+        );
+    },
+
+    // 增加 handleZip 函数以在 Worker 执行处理逻辑
+    handleZip(url, options, onComplete) {
+        // 暂未实现 options.onFileProgress 回调
+        worker.cacheManager.handleZip(
+            [url, options.header, options.__cacheBundleRoot__],
+            ([errMsg, path]) => {
+                if (errMsg) {
+                    onComplete(new Error(errMsg), null);
+                } else {
+                    onComplete(null, path);
+                }
+            },
+        );
+    },
+
+    getCache(url) {
+        return this.cachedFiles.has(url) ? this.cachedFiles.get(url).url : '';
+    },
+
+    // getTemp 改为异步函数
+    getTempAsync(url, callback) {
+        worker.cacheManager.getTemp([url], ([url]) => {
+            callback(url);
+        });
+    },
+
+    init() {
+        this._cacheDir = getUserDataPath() + '/' + this.cacheDir;
+        worker.cacheManager.init(null, ([cachedFiles]) => {
+            this.cachedFiles = new cc.AssetManager.Cache(cachedFiles);
+        });
+    },
+
+    clearCache() {
+        worker.cacheManager.clearCache(null, () => {
+            this.cachedFiles.clear();
+        });
+    },
+
+    clearLRU() {
+        worker.cacheManager.clearLRU(null, ([deletedFiles]) => {
+            for (let i = 0, l = deletedFiles.length; i < l; i++) {
+                this.cachedFiles.remove(deletedFiles[i]);
+            }
+        });
+    },
+
+    removeCache(url) {
+        worker.cacheManager.removeCache([url], () => {
+            this.cachedFiles.remove(url);
+        });
+    },
+
+    makeBundleFolder(bundleName) {
+        makeDirSync(this.cacheDir + '/' + bundleName, true);
+    },
+};
+
+cc.assetManager.cacheManager = module.exports = cacheManager;

adapters/common/engine/AssetManager.js

@@ -1,4 +1,4 @@
-const cacheManager = require('../cache-manager');
+const cacheManager = CC_WORKER_ASSET_PIPELINE ? require('../cache-manager-proxy') : require('../cache-manager');
 const { fs, downloadFile, readText, readArrayBuffer, readJson, loadSubpackage, getUserDataPath, exists } = window.fsUtils;
 
 const REGEX = /^https?:\/\/.*/;
@@ -29,7 +29,11 @@ function downloadScript (url, options, onComplete) {
     }
 }
 
-function handleZip (url, options, onComplete) {
+var handleZip = CC_WORKER_ASSET_PIPELINE
+    ? function handleZip(url, options, onComplete) {
+        cacheManager.handleZip(url, options, onComplete);
+    }
+    : function handleZip(url, options, onComplete) {
         let cachedUnzip = cacheManager.cachedFiles.get(url);
         if (cachedUnzip) {
             cacheManager.updateLastTime(url);
@@ -68,7 +72,11 @@ function downloadDomAudio (url, options, onComplete) {
     onComplete && onComplete(null, dom);
 }
 
-function download (url, func, options, onFileProgress, onComplete) {
+var download = CC_WORKER_ASSET_PIPELINE
+    ? function download(url, func, options, onFileProgress, onComplete) {
+        cacheManager.download(url, func, options, onFileProgress, onComplete);
+    }
+    : function download(url, func, options, onFileProgress, onComplete) {
         var result = transformUrl(url, options);
         if (result.inLocal) {
             func(result.url, options, onComplete);
@@ -132,6 +140,10 @@ var loadFont = !isSubDomain ? function (url, options, onComplete) {
 }
 
 function doNothing(content, options, onComplete) {
+    if (CC_WORKER_ASSET_PIPELINE) {
+        onComplete(null, content); 
+        return;
+    }
     exists(content, (existence) => {
         if (existence) {
             onComplete(null, content); 
@@ -402,6 +414,9 @@ parser.register({
 });
 
 var transformUrl = !isSubDomain ? function (url, options) {
+    if (CC_WORKER_ASSET_PIPELINE) {
+        console.error('transformUrl should not be called when the macro CC_WORKER_ASSET_PIPELINE is enabled.');
+    }
     var inLocal = false;
     var inCache = false;
     var isInUserDataPath = url.startsWith(getUserDataPath());

adapters/platforms/wechat/res/game.js

@@ -1,3 +1,4 @@
+const initWorker = require('./worker_adapter/index.js');
 require('adapter-js-path');
 __globalAdapter.init();
 require('cocos2d-js-path');
@@ -17,4 +18,6 @@ if (cc.sys.platform !== cc.sys.WECHAT_GAME_SUB) {
     cc.macro.CLEANUP_IMAGE_CACHE = true;
 }
 
+initWorker(() => {
     window.boot();
+});

adapters/platforms/wechat/res/game.json

@@ -13,5 +13,9 @@
       "version": "2.4.15",
       "path": "cocos"
     }
+  },
+  "workers": {
+    "path": "workers",
+    "isSubpackage": false
   }
 }

adapters/platforms/wechat/res/worker_adapter/asset-manager.js

@@ -0,0 +1,27 @@
+var assetManagerWorkerAdapter = {
+    // 返回当前 cc.assetManager.bundles 的 [name, base]
+    getAllBundles(args, cmdId, callback) {
+        var bundles = [];
+        cc.assetManager.bundles.forEach((v, k) => {
+            bundles.push([v.name, v.base]);
+        });
+        callback(cmdId, [bundles]);
+    },
+    // 删除缓存文件记录
+    removeCachedFiles(args, cmdId, callback) {
+        const deletedFiles = args[0];
+        for (let i = 0, l = deletedFiles.length; i < l; i++) {
+            cc.assetManager.cacheManager.cachedFiles.remove(deletedFiles[i]);
+        }
+    },
+    // 添加缓存文件记录
+    addCachedFiles(args, cmdId, callback) {
+        const addedFiles = args[0];
+        for (let i = 0, l = addedFiles.length; i < l; i++) {
+            const [id, cacheBundleRoot, localPath, time] = addedFiles[i];
+            cc.assetManager.cacheManager.cachedFiles.add(id, { bundle: cacheBundleRoot, url: localPath, lastTime: time });
+        }
+    },
+};
+
+module.exports = assetManagerWorkerAdapter;

adapters/platforms/wechat/res/worker_adapter/handlers.js

@@ -0,0 +1,4 @@
+if (CC_WORKER_ASSET_PIPELINE) {
+    const assetManagerWorkerAdapter = require("./asset-manager.js");
+    ipcMain.registerHandler("assetManager", assetManagerWorkerAdapter);
+}

adapters/platforms/wechat/res/worker_adapter/index.js

@@ -0,0 +1,15 @@
+require("./macro.js");
+require("./ipc-main.js");
+require("./handlers.js");
+
+module.exports = function init(callback) {
+    if (CC_USE_WORKER) {
+        var t = Date.now();
+        ipcMain.init(() => {
+            console.log("worker init cost:", Date.now() - t);
+            callback();
+        });
+    } else {
+        callback();
+    }
+}

adapters/platforms/wechat/res/worker_adapter/ipc-main.js

@@ -0,0 +1,220 @@
+const ipcMain = {
+    worker: null,
+
+    cmdId: 0,
+
+    callbacks: {},
+
+    _cmd: 0,
+
+    handlers: {},
+
+    _inited: false,
+
+    _initCallback: null,
+
+    init(callback) {
+        this._initCallback = callback;
+
+        this.worker = wx.createWorker("workers/index.js", { useExperimentalWorker: true });
+
+        this.worker.onProcessKilled(() => {
+            console.warn("worker has been killed");
+            this.worker.terminate();
+            this.worker = null;
+            // TODO 这里还未正确处理，还需要重新 init cacheManager 等等，把这边对属性的修改同步过来
+        });
+
+        this.worker.onMessage(
+            CC_WORKER_SCHEDULER
+                ? msgs => {
+                    for (let index = 0; index < msgs.length; index++) {
+                        const msg = msgs[index];
+                        this._handleWorkerMessage(msg);
+                    }
+                }
+                : this._handleWorkerMessage.bind(this)
+        );
+
+        if (CC_WORKER_SCHEDULER) {
+            sendScheduler.init(this);
+        }
+
+        this._init();
+    },
+
+    _handleWorkerMessage(msg) {
+        // 格式：[id, cmd, [args] | null]
+        // 如果 cmd 是正数，则是返回到主线程的 Callback
+        // 反之，是 Worker 的调用
+
+        // [-, 0, handlers] 为初始化调用
+
+        const id = msg[0];
+        const cmd = msg[1];
+        const args = msg[2];
+
+        if (cmd > 0) {
+            if (CC_WORKER_DEBUG) {
+                console.log("main thread recv callback:", msg);
+            }
+            const callback = this.callbacks[id];
+            if (callback) {
+                callback(args);
+                delete this.callbacks[id];
+            }
+        } else if (cmd < 0) {
+            const handler = this.handlers[cmd];
+
+            if (handler) {
+                const { func, name, key, callback } = handler;
+
+                if (CC_WORKER_DEBUG) {
+                    console.log(`main thread recv call (${name}.${key}):`, msg);
+                }
+
+                func(args, id, callback);
+            } else {
+                console.error("main thread recv unknown call:", msg);
+            }
+        } else {
+            if (CC_WORKER_DEBUG) {
+                console.log("main thread recv init:", msg);
+            }
+            this._initFromWorker(args);
+        }
+    },
+
+    _init() {
+        const _handlers = [];
+        for (const cmd in this.handlers) {
+            const { name, key } = this.handlers[cmd];
+            _handlers.push({ name, cmd: Number(cmd), key });
+        }
+
+        this.callToWorker(0, [
+            _handlers,
+            CC_WORKER_FS_SYNC,
+            CC_WORKER_ASSET_PIPELINE,
+        ]);
+    },
+
+    _initFromWorker(wrappers) {
+        for (const wrapper of wrappers) {
+            const { name, key, cmd } = wrapper;
+            if (!worker[name]) {
+                worker[name] = {};
+            }
+            worker[name][key] = (args, callback) => {
+                this.callToWorker(cmd, args, callback);
+            };
+        }
+
+        this._inited = true;
+        if (this._initCallback) this._initCallback();
+    },
+
+    callbackToWorker(id, cmd, args) {
+        const msg = [id, cmd, args];
+
+        if (CC_WORKER_DEBUG) {
+            console.log("main thread send callback:", msg);
+        }
+
+        if (CC_WORKER_SCHEDULER) {
+            sendScheduler.send(msg);
+        } else {
+            this.worker.postMessage(msg);
+        }
+    },
+
+    callToWorker(cmd, args, callback) {
+        const id = ++this.cmdId;
+
+        if (callback) {
+            this.callbacks[id] = callback;
+        }
+
+        const msg = [id, cmd, args];
+
+        if (CC_WORKER_DEBUG) {
+            console.log("main thread send call:", msg);
+        }
+
+        if (CC_WORKER_SCHEDULER) {
+            sendScheduler.send(msg);
+        } else {
+            this.worker.postMessage(msg);
+        }
+    },
+
+    registerHandler(name, obj) {
+        const descs = Object.getOwnPropertyDescriptors(obj);
+
+        for (const key in descs) {
+            const desc = descs[key];
+
+            if (typeof desc.value === "function") {
+                const cmd = ++this._cmd;
+                this.handlers[cmd] = {
+                    name,
+                    key,
+                    func: obj[key].bind(obj),
+                    callback: (id, args) => this.callbackToWorker(id, cmd, args),
+                };
+            } else {
+                // getter/setter
+                const cmd1 = ++this._cmd;
+                this.handlers[cmd1] = {
+                    name,
+                    key: "get_" + key,
+                    func: (args, id, callback) => {
+                        this.callbackToWorker(id, cmd1, [obj[key]]);
+                    },
+                    callback: null,
+                };
+                const cmd2 = ++this._cmd;
+                this.handlers[cmd2] = {
+                    name,
+                    key: "set_" + key,
+                    func: (args, id, callback) => {
+                        obj[key] = args[0];
+                    }
+                };
+                const cmd3 = ++this._cmd;
+                this.handlers[cmd3] = {
+                    name,
+                    key: "write_" + key,
+                    func: (args, id, callback) => {
+                        obj[key] = args[0];
+                        this.callbackToWorker(id, cmd3, null);
+                    }
+                };
+            }
+        }
+    },
+};
+
+const sendScheduler = {
+    queue: [],
+    ipc: null,
+
+    init(ipc) {
+        this.ipc = ipc;
+        setInterval(() => {
+            if (this.queue.length > 0) {
+                this.ipc.worker.postMessage(this.queue);
+                this.queue = [];
+            }
+        }, 0);
+    },
+
+    send(msg) {
+        this.queue.push(msg);
+    },
+};
+
+const worker = {};
+
+globalThis.ipcMain = ipcMain;
+globalThis.worker = worker;

adapters/platforms/wechat/res/worker_adapter/macro.js

@@ -0,0 +1,23 @@
+const isSubContext = wx.getOpenDataContext === undefined;
+const sysinfo = wx.getSystemInfoSync();
+const platform = sysinfo.platform.toLowerCase();
+const isIOS = platform === "ios";
+const sdkVersion = sysinfo.SDKVersion.split('.').map(Number);
+// >= 2.20.2
+const hasWorker = sdkVersion[0] > 2 || (sdkVersion[0] === 2 && (sdkVersion[1] > 20 || (sdkVersion[1] === 20 && sdkVersion[2] >= 2)));
+
+// 是否启用 Worker 驱动资源管线（下载、缓存）
+globalThis.CC_WORKER_ASSET_PIPELINE = false;
+
+// 是否启用 Worker
+globalThis.CC_USE_WORKER = (CC_WORKER_ASSET_PIPELINE) && hasWorker && !isSubContext;
+
+// 是否启用 Worker 调试模式
+globalThis.CC_WORKER_DEBUG = true;
+
+// 是否启用 Worker 调度模式，这也许能减少通信次数带来的性能消耗（必须一致）
+globalThis.CC_WORKER_SCHEDULER = true;
+
+// 是否启用 Worker 使用同步版本的文件系统 API
+// NOTE: IOS 不支持 async 文件系统 API，Android 不支持部分 sync 文件系统 API
+globalThis.CC_WORKER_FS_SYNC = isIOS;

adapters/platforms/wechat/res/workers/cache-manager-worker.js

@@ -0,0 +1,347 @@
+const { getUserDataPath, readJsonSync, deleteFileSync, makeDirSync, writeFileSync, copyFile, downloadFile, writeFile, deleteFile, rmdirSync, unzip, isOutOfStorage } = require("./fs-utils.js");
+const { extname } = require("./path.js");
+const { main } = require("./ipc-worker.js");
+
+var checkNextPeriod = false;
+var writeCacheFileTimer = null;
+var suffix = 0;
+const REGEX = /^https?:\/\/.*/;
+
+function isEmptyObject(obj) {
+    for (var key in obj) {
+        return false;
+    }
+    return true;
+}
+
+var cacheManager_worker = {
+
+    cacheDir: 'gamecaches',
+
+    cachedFileName: 'cacheList.json',
+
+    // whether or not cache asset into user's storage space
+    cacheEnabled: true,
+
+    // whether or not auto clear cache when storage ran out
+    autoClear: true,
+
+    // cache one per cycle
+    cacheInterval: 500,
+
+    deleteInterval: 500,
+
+    writeFileInterval: 2000,
+
+    // whether or not storage space has run out
+    outOfStorage: false,
+
+    tempFiles: null,
+
+    cachedFiles: null,
+
+    cacheQueue: {},
+
+    version: '1.0',
+
+    init(callback) {
+        this.cacheDir = getUserDataPath() + '/' + this.cacheDir;
+        var cacheFilePath = this.cacheDir + '/' + this.cachedFileName;
+        var result = readJsonSync(cacheFilePath);
+        if (result instanceof Error || !result.version) {
+            if (!(result instanceof Error)) rmdirSync(this.cacheDir, true);
+            this.cachedFiles = {};
+            makeDirSync(this.cacheDir, true);
+            writeFileSync(cacheFilePath, JSON.stringify({ files: this.cachedFiles, version: this.version }), 'utf8');
+        }
+        else {
+            this.cachedFiles = result.files;
+        }
+        this.tempFiles = {};
+        callback(this.cachedFiles);
+    },
+
+    transformUrl(url, reload) {
+        var inLocal = false;
+        var inCache = false;
+        var isInUserDataPath = url.startsWith(getUserDataPath());
+        if (isInUserDataPath) {
+            inLocal = true;
+        } else if (REGEX.test(url)) {
+            if (!reload) {
+                var cache = this.cachedFiles[url];
+                if (cache) {
+                    inCache = true;
+                    url = cache.url;
+                } else {
+                    var tempUrl = this.tempFiles[url];
+                    if (tempUrl) {
+                        inLocal = true;
+                        url = tempUrl;
+                    }
+                }
+            }
+        } else {
+            inLocal = true;
+        }
+        return { url, inLocal, inCache };
+    },
+
+    download(
+        callback,
+        url,
+        options_reload,
+        options_header,
+        options_cacheEnabled,
+        options___cacheBundleRoot__,
+    ) {
+        var result = this.transformUrl(url, options_reload);
+        if (result.inLocal) {
+            callback(null, result.url);
+        } else if (result.inCache) {
+            this.updateLastTime(url);
+            callback(null, result.url);
+        }
+        else {
+            downloadFile(url, null, options_header, null, (err, path) => {
+                if (err) {
+                    callback(err.message, null);
+                    return;
+                }
+                this.tempFiles[url] = path;
+                this.cacheFile(null, url, path, options_cacheEnabled, options___cacheBundleRoot__, true);
+                callback(null, path);
+            });
+        }
+    },
+
+    handleZip(
+        callback,
+        url,
+        options_header,
+        options___cacheBundleRoot__,
+    ) {
+        let cachedUnzip = this.cachedFiles[url];
+        if (cachedUnzip) {
+            this.updateLastTime(url);
+            callback(null, cachedUnzip.url);
+        } else if (REGEX.test(url)) {
+            downloadFile(url, null, options_header, null, (err, downloadedZipPath) => {
+                if (err) {
+                    callback(err.message, null);
+                    return;
+                }
+                this.unzipAndCacheBundle(url, downloadedZipPath, options___cacheBundleRoot__, callback);
+            });
+        } else {
+            this.unzipAndCacheBundle(url, url, options___cacheBundleRoot__, callback);
+        }
+    },
+
+    getTemp(callback, url) {
+        callback(this.tempFiles.has(url) ? this.tempFiles.get(url) : '');
+    },
+
+    updateLastTime(url) {
+        if (this.cachedFiles[url]) {
+            var cache = this.cachedFiles[url];
+            cache.lastTime = Date.now();
+        }
+    },
+
+    writeCacheFile() {
+        if (!writeCacheFileTimer) {
+            writeCacheFileTimer = setTimeout(() => {
+                writeCacheFileTimer = null;
+                writeFile(this.cacheDir + '/' + this.cachedFileName, JSON.stringify({ files: this.cachedFiles, version: this.version }), "utf8", () => { });
+            }, this.writeFileInterval);
+        }
+    },
+
+    writeCacheFileSync() {
+        writeFileSync(this.cacheDir + '/' + this.cachedFileName, JSON.stringify({ files: this.cachedFiles, version: this.version }), "utf8");
+    },
+
+    _cache() {
+        var self = this;
+        for (var id in this.cacheQueue) {
+            var { srcUrl, isCopy, cacheBundleRoot, callback: _callback } = this.cacheQueue[id];
+            var time = Date.now().toString();
+
+            var localPath = '';
+
+            if (cacheBundleRoot) {
+                localPath = `${this.cacheDir}/${cacheBundleRoot}/${time}${suffix++}${extname(id)}`;
+            }
+            else {
+                localPath = `${this.cacheDir}/${time}${suffix++}${extname(id)}`;
+            }
+
+            function callback(err) {
+                checkNextPeriod = false;
+                if (err) {
+                    if (isOutOfStorage(err.message)) {
+                        self.outOfStorage = true;
+                        self.autoClear && self.clearLRU();
+                        return;
+                    }
+                } else {
+                    self.cachedFiles[id] = { bundle: cacheBundleRoot, url: localPath, lastTime: time };
+                    delete self.cacheQueue[id];
+                    self.writeCacheFile();
+                    // TODO             main.assetManager.addCachedFiles([[id, cacheBundleRoot, localPath, time]]);
+                    if (_callback) _callback(id, cacheBundleRoot, localPath, time);
+                }
+                if (!isEmptyObject(self.cacheQueue)) {
+                    checkNextPeriod = true;
+                    setTimeout(self._cache.bind(self), self.cacheInterval);
+                }
+            }
+            if (!isCopy) {
+                downloadFile(srcUrl, localPath, null, callback);
+            }
+            else {
+                copyFile(srcUrl, localPath, callback);
+            }
+            return;
+        }
+        checkNextPeriod = false;
+    },
+
+    cacheFile(callback, id, srcUrl, cacheEnabled, cacheBundleRoot, isCopy) {
+        cacheEnabled = cacheEnabled !== undefined ? cacheEnabled : this.cacheEnabled;
+        if (!cacheEnabled || this.cacheQueue[id] || this.cachedFiles[id]) {
+            if (callback) callback(null);
+            return;
+        }
+
+        this.cacheQueue[id] = { srcUrl, cacheBundleRoot, isCopy, callback };
+        if (!checkNextPeriod) {
+            checkNextPeriod = true;
+            if (!this.outOfStorage) {
+                setTimeout(this._cache.bind(this), this.cacheInterval);
+            }
+            else {
+                checkNextPeriod = false;
+            }
+        }
+    },
+
+    clearCache(callback) {
+        main.assetManager.getAllBundles(bundles => {
+            this.cachedFiles = {};
+            this.writeCacheFileSync();
+
+            rmdirSync(this.cacheDir, true);
+            makeDirSync(this.cacheDir, true);
+
+            this.outOfStorage = false;
+
+            bundles.forEach(bundle => {
+                const [name, base] = bundle;
+                if (REGEX.test(base)) this.makeBundleFolder(name);
+            });
+
+            callback();
+        });
+    },
+
+    clearLRU(callback) {
+        main.assetManager.getAllBundles(bundles => {
+            var caches = [];
+            var self = this;
+
+            for (const key in this.cachedFiles) {
+                const val = this.cachedFiles[key];
+                if (val.bundle === 'internal') continue;
+                if (self._isZipFile(key) && bundles.find(bundle => bundle[1].indexOf(val.url) !== -1)) continue;
+                caches.push({ originUrl: key, url: val.url, lastTime: val.lastTime });
+            }
+
+            caches.sort(function (a, b) {
+                return a.lastTime - b.lastTime;
+            });
+
+            caches.length = Math.floor(caches.length / 3);
+
+            if (caches.length === 0) {
+                if (callback) {
+                    callback([]);
+                }
+                return;
+            }
+
+            for (var i = 0, l = caches.length; i < l; i++) {
+                const item = caches[i];
+                delete this.cachedFiles[item.originUrl];
+                if (self._isZipFile(item.originUrl)) {
+                    rmdirSync(item.url, true);
+                } else {
+                    deleteFileSync(item.url);
+                }
+            }
+
+            this.outOfStorage = false;
+
+            self.writeCacheFileSync();
+
+            if (callback) {
+                callback(caches.map(v => v.originUrl));
+            } else {
+                main.assetManager.removeCachedFiles(caches.map(v => v.originUrl));
+            }
+        });
+    },
+
+    removeCache(callback, url) {
+        if (this.cachedFiles[url]) {
+            var self = this;
+            var path = this.cachedFiles[url].url;
+
+            delete this.cachedFiles[url];
+
+            if (self._isZipFile(url)) {
+                rmdirSync(path, true);
+            } else {
+                deleteFileSync(path);
+            }
+
+            this.outOfStorage = false;
+
+            self.writeCacheFileSync();
+        }
+        if (callback) callback();
+    },
+
+    makeBundleFolder(bundleName) {
+        makeDirSync(this.cacheDir + '/' + bundleName, true);
+    },
+
+    unzipAndCacheBundle(id, zipFilePath, cacheBundleRoot, onComplete) {
+        let time = Date.now().toString();
+        let targetPath = `${this.cacheDir}/${cacheBundleRoot}/${time}${suffix++}`;
+        let self = this;
+        makeDirSync(targetPath, true);
+        unzip(zipFilePath, targetPath, function (err) {
+            if (err) {
+                rmdirSync(targetPath, true);
+                if (isOutOfStorage(err.message)) {
+                    self.outOfStorage = true;
+                    self.autoClear && self.clearLRU();
+                }
+                onComplete && onComplete(err);
+                return;
+            }
+            self.cachedFiles[id] = { bundle: cacheBundleRoot, url: targetPath, lastTime: time };
+            self.writeCacheFile();
+            main.assetManager.addCachedFiles([[id, cacheBundleRoot, targetPath, time]]);
+            onComplete && onComplete(null, targetPath);
+        });
+    },
+
+    _isZipFile(url) {
+        return url.slice(-4) === '.zip';
+    },
+};
+
+module.exports = cacheManager_worker;

adapters/platforms/wechat/res/workers/fs-utils-async.js

@@ -0,0 +1,261 @@
+/****************************************************************************
+ Copyright (c) 2017-2019 Xiamen Yaji Software Co., Ltd.
+
+ https://www.cocos.com/
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of fsUtils software and associated engine source code (the "Software"), a limited,
+  worldwide, royalty-free, non-assignable, revocable and non-exclusive license
+ to use Cocos Creator solely to develop games on your target platforms. You shall
+  not use Cocos Creator software for developing other software or tools that's
+  used for developing games. You are not granted to publish, distribute,
+  sublicense, and/or sell copies of Cocos Creator.
+
+ The software or tools in fsUtils License Agreement are licensed, not sold.
+ Xiamen Yaji Software Co., Ltd. reserves all rights not expressly granted to you.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+ ****************************************************************************/
+var fs = worker.getFileSystemManager();
+var outOfStorageRegExp = /the maximum size of the file storage/;
+
+var fsUtils = {
+
+    fs,
+
+    isOutOfStorage(errMsg) {
+        return outOfStorageRegExp.test(errMsg);
+    },
+
+    getUserDataPath() {
+        return worker.env.USER_DATA_PATH;
+    },
+
+    checkFsValid() {
+        if (!fs) {
+            console.warn('can not get the file system!');
+            return false;
+        }
+        return true;
+    },
+
+    deleteFile(filePath, onComplete) {
+        fs.unlink({
+            filePath: filePath,
+            success: function () {
+                onComplete && onComplete(null);
+            },
+            fail: function (res) {
+                console.warn(`Delete file failed: path: ${filePath} message: ${res.errMsg}`);
+                onComplete && onComplete(new Error(res.errMsg));
+            }
+        });
+    },
+
+    deleteFileSync(filePath, onComplete) {
+        try {
+            fs.unlinkSync(filePath);
+            onComplete && onComplete(null);
+        } catch (error) {
+            console.warn(`Delete file failed: path: ${filePath} message: ${error.message}`);
+            onComplete && onComplete(error);
+        }
+    },
+
+    downloadFile(remoteUrl, filePath, header, onProgress, onComplete) {
+        var options = {
+            url: remoteUrl,
+            success: function (res) {
+                if (res.statusCode === 200) {
+                    onComplete && onComplete(null, res.tempFilePath || res.filePath);
+                }
+                else {
+                    if (res.filePath) {
+                        fsUtils.deleteFile(res.filePath);
+                    }
+                    console.warn(`Download file failed: path: ${remoteUrl} message: ${res.statusCode}`);
+                    onComplete && onComplete(new Error(res.statusCode), null);
+                }
+            },
+            fail: function (res) {
+                console.warn(`Download file failed: path: ${remoteUrl} message: ${res.errMsg}`);
+                onComplete && onComplete(new Error(res.errMsg), null);
+            }
+        }
+        if (filePath) options.filePath = filePath;
+        if (header) options.header = header;
+        var task = worker.downloadFile(options);
+        onProgress && task.onProgressUpdate(onProgress);
+    },
+
+    saveFile(srcPath, destPath, onComplete) {
+        fs.saveFile({
+            tempFilePath: srcPath,
+            filePath: destPath,
+            success: function (res) {
+                onComplete && onComplete(null);
+            },
+            fail: function (res) {
+                console.warn(`Save file failed: path: ${srcPath} message: ${res.errMsg}`);
+                onComplete && onComplete(new Error(res.errMsg));
+            }
+        });
+    },
+
+    copyFile(srcPath, destPath, onComplete) {
+        fs.copyFile({
+            srcPath: srcPath,
+            destPath: destPath,
+            success: function () {
+                onComplete && onComplete(null);
+            },
+            fail: function (res) {
+                console.warn(`Copy file failed: path: ${srcPath} message: ${res.errMsg}`);
+                onComplete && onComplete(new Error(res.errMsg));
+            }
+        });
+    },
+
+    writeFile(path, data, encoding, onComplete) {
+        fs.writeFile({
+            filePath: path,
+            encoding: encoding,
+            data: data,
+            success: function () {
+                onComplete && onComplete(null);
+            },
+            fail: function (res) {
+                console.warn(`Write file failed: path: ${path} message: ${res.errMsg}`);
+                onComplete && onComplete(new Error(res.errMsg));
+            }
+        });
+    },
+
+    writeFileSync(path, data, encoding) {
+        try {
+            fs.writeFileSync(path, data, encoding);
+            return null;
+        }
+        catch (e) {
+            console.warn(`Write file failed: path: ${path} message: ${e.message}`);
+            return new Error(e.message);
+        }
+    },
+
+    readFile(filePath, encoding, onComplete) {
+        fs.readFile({
+            filePath: filePath,
+            encoding: encoding,
+            success: function (res) {
+                onComplete && onComplete(null, res.data);
+            },
+            fail: function (res) {
+                console.warn(`Read file failed: path: ${filePath} message: ${res.errMsg}`);
+                onComplete && onComplete(new Error(res.errMsg), null);
+            }
+        });
+    },
+
+    readDir(filePath, onComplete) {
+        fs.readdir({
+            dirPath: filePath,
+            success: function (res) {
+                onComplete && onComplete(null, res.files);
+            },
+            fail: function (res) {
+                console.warn(`Read directory failed: path: ${filePath} message: ${res.errMsg}`);
+                onComplete && onComplete(new Error(res.errMsg), null);
+            }
+        });
+    },
+
+    readText(filePath, onComplete) {
+        fsUtils.readFile(filePath, 'utf8', onComplete);
+    },
+
+    readArrayBuffer(filePath, onComplete) {
+        fsUtils.readFile(filePath, '', onComplete);
+    },
+
+    readJson(filePath, onComplete) {
+        fsUtils.readFile(filePath, 'utf8', function (err, text) {
+            var out = null;
+            if (!err) {
+                try {
+                    out = JSON.parse(text);
+                }
+                catch (e) {
+                    console.warn(`Read json failed: path: ${filePath} message: ${e.message}`);
+                    err = new Error(e.message);
+                }
+            }
+            onComplete && onComplete(err, out);
+        });
+    },
+
+    readJsonSync(path) {
+        try {
+            var str = fs.readFileSync(path, 'utf8');
+            return JSON.parse(str);
+        }
+        catch (e) {
+            console.warn(`Read json failed: path: ${path} message: ${e.message}`);
+            return new Error(e.message);
+        }
+    },
+
+    makeDirSync(path, recursive) {
+        try {
+            fs.mkdirSync(path, recursive);
+            return null;
+        }
+        catch (e) {
+            console.warn(`Make directory failed: path: ${path} message: ${e.message}`);
+            return new Error(e.message);
+        }
+    },
+
+    rmdirSync(dirPath, recursive) {
+        try {
+            fs.rmdirSync(dirPath, recursive);
+        }
+        catch (e) {
+            console.warn(`rm directory failed: path: ${dirPath} message: ${e.message}`);
+            return new Error(e.message);
+        }
+    },
+
+    exists(filePath, onComplete) {
+        fs.access({
+            path: filePath,
+            success: function () {
+                onComplete && onComplete(true);
+            },
+            fail: function () {
+                onComplete && onComplete(false);
+            }
+        });
+    },
+
+    unzip(zipFilePath, targetPath, onComplete) {
+        fs.unzip({
+            zipFilePath,
+            targetPath,
+            success() {
+                onComplete && onComplete(null);
+            },
+            fail(res) {
+                console.warn(`unzip failed: path: ${zipFilePath} message: ${res.errMsg}`);
+                onComplete && onComplete(new Error('unzip failed: ' + res.errMsg));
+            },
+        })
+    },
+};
+
+module.exports = fsUtils;

adapters/platforms/wechat/res/workers/fs-utils-sync.js

@@ -0,0 +1,235 @@
+/****************************************************************************
+ Copyright (c) 2017-2019 Xiamen Yaji Software Co., Ltd.
+
+ https://www.cocos.com/
+
+ Permission is hereby granted, free of charge, to any person obtaining a copy
+ of fsUtils software and associated engine source code (the "Software"), a limited,
+  worldwide, royalty-free, non-assignable, revocable and non-exclusive license
+ to use Cocos Creator solely to develop games on your target platforms. You shall
+  not use Cocos Creator software for developing other software or tools that's
+  used for developing games. You are not granted to publish, distribute,
+  sublicense, and/or sell copies of Cocos Creator.
+
+ The software or tools in fsUtils License Agreement are licensed, not sold.
+ Xiamen Yaji Software Co., Ltd. reserves all rights not expressly granted to you.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ THE SOFTWARE.
+ ****************************************************************************/
+var fs = worker.getFileSystemManager();
+var outOfStorageRegExp = /the maximum size of the file storage/;
+
+var fsUtils = {
+
+    fs,
+
+    isOutOfStorage(errMsg) {
+        return outOfStorageRegExp.test(errMsg);
+    },
+
+    getUserDataPath() {
+        return worker.env.USER_DATA_PATH;
+    },
+
+    checkFsValid() {
+        if (!fs) {
+            console.warn('can not get the file system!');
+            return false;
+        }
+        return true;
+    },
+
+    deleteFile(filePath, onComplete) {
+        try {
+            fs.unlinkSync(filePath);
+            onComplete && onComplete(null);
+        } catch (error) {
+            console.warn(`Delete file failed: path: ${filePath} message: ${error.message}`);
+            onComplete && onComplete(error);
+        }
+    },
+
+    deleteFileSync(filePath, onComplete) {
+        try {
+            fs.unlinkSync(filePath);
+            onComplete && onComplete(null);
+        } catch (error) {
+            console.warn(`Delete file failed: path: ${filePath} message: ${error.message}`);
+            onComplete && onComplete(error);
+        }
+    },
+
+    downloadFile(remoteUrl, filePath, header, onProgress, onComplete) {
+        var options = {
+            url: remoteUrl,
+            success: function (res) {
+                if (res.statusCode === 200) {
+                    onComplete && onComplete(null, res.tempFilePath || res.filePath);
+                }
+                else {
+                    if (res.filePath) {
+                        fsUtils.deleteFile(res.filePath);
+                    }
+                    console.warn(`Download file failed: path: ${remoteUrl} message: ${res.statusCode}`);
+                    onComplete && onComplete(new Error(res.statusCode), null);
+                }
+            },
+            fail: function (res) {
+                console.warn(`Download file failed: path: ${remoteUrl} message: ${res.errMsg}`);
+                onComplete && onComplete(new Error(res.errMsg), null);
+            }
+        }
+        if (filePath) options.filePath = filePath;
+        if (header) options.header = header;
+        var task = worker.downloadFile(options);
+        onProgress && task.onProgressUpdate(onProgress);
+    },
+
+    saveFile(srcPath, destPath, onComplete) {
+        try {
+            fs.saveFileSync(srcPath, destPath);
+            onComplete && onComplete(null);
+        } catch (error) {
+            console.warn(`Save file failed: path: ${srcPath} message: ${error.message}`);
+            onComplete && onComplete(error);
+        }
+    },
+
+    copyFile(srcPath, destPath, onComplete) {
+        try {
+            fs.copyFileSync(srcPath, destPath);
+            onComplete && onComplete(null);
+        } catch (error) {
+            console.warn(`Copy file failed: path: ${srcPath} message: ${error.message}`);
+            onComplete && onComplete(error);
+        }
+    },
+
+    writeFile(path, data, encoding, onComplete) {
+        try {
+            fs.writeFileSync(path, data, encoding);
+            onComplete && onComplete(null);
+        } catch (error) {
+            console.warn(`Write file failed: path: ${path} message: ${error.message}`);
+            onComplete && onComplete(error);
+        }
+    },
+
+    writeFileSync(path, data, encoding) {
+        try {
+            fs.writeFileSync(path, data, encoding);
+            return null;
+        }
+        catch (e) {
+            console.warn(`Write file failed: path: ${path} message: ${e.message}`);
+            return new Error(e.message);
+        }
+    },
+
+    readFile(filePath, encoding, onComplete) {
+        try {
+            var data = fs.readFileSync(filePath, encoding);
+            onComplete && onComplete(null, data);
+        } catch (error) {
+            console.warn(`Read file failed: path: ${filePath} message: ${error.message}`);
+            onComplete && onComplete(error, null);
+        }
+    },
+
+    readDir(filePath, onComplete) {
+        try {
+            var files = fs.readdirSync(filePath);
+            onComplete && onComplete(null, files);
+        } catch (error) {
+            console.warn(`Read directory failed: path: ${filePath} message: ${error.message}`);
+            onComplete && onComplete(error, null);
+        }
+    },
+
+    readText(filePath, onComplete) {
+        fsUtils.readFile(filePath, 'utf8', onComplete);
+    },
+
+    readArrayBuffer(filePath, onComplete) {
+        fsUtils.readFile(filePath, '', onComplete);
+    },
+
+    readJson(filePath, onComplete) {
+        fsUtils.readFile(filePath, 'utf8', function (err, text) {
+            var out = null;
+            if (!err) {
+                try {
+                    out = JSON.parse(text);
+                }
+                catch (e) {
+                    console.warn(`Read json failed: path: ${filePath} message: ${e.message}`);
+                    err = new Error(e.message);
+                }
+            }
+            onComplete && onComplete(err, out);
+        });
+    },
+
+    readJsonSync(path) {
+        try {
+            var str = fs.readFileSync(path, 'utf8');
+            return JSON.parse(str);
+        }
+        catch (e) {
+            console.warn(`Read json failed: path: ${path} message: ${e.message}`);
+            return new Error(e.message);
+        }
+    },
+
+    makeDirSync(path, recursive) {
+        try {
+            fs.mkdirSync(path, recursive);
+            return null;
+        }
+        catch (e) {
+            console.warn(`Make directory failed: path: ${path} message: ${e.message}`);
+            return new Error(e.message);
+        }
+    },
+
+    rmdirSync(dirPath, recursive) {
+        try {
+            fs.rmdirSync(dirPath, recursive);
+        }
+        catch (e) {
+            console.warn(`rm directory failed: path: ${dirPath} message: ${e.message}`);
+            return new Error(e.message);
+        }
+    },
+
+    exists(filePath, onComplete) {
+        try {
+            fs.accessSync(filePath);
+            onComplete && onComplete(true);
+        } catch (error) {
+            onComplete && onComplete(false);
+        }
+    },
+
+    unzip(zipFilePath, targetPath, onComplete) {
+        fs.unzip({
+            zipFilePath,
+            targetPath,
+            success() {
+                onComplete && onComplete(null);
+            },
+            fail(res) {
+                console.warn(`unzip failed: path: ${zipFilePath} message: ${res.errMsg}`);
+                onComplete && onComplete(new Error('unzip failed: ' + res.errMsg));
+            },
+        })
+    },
+};
+
+module.exports = fsUtils;

adapters/platforms/wechat/res/workers/fs-utils.js

@@ -0,0 +1 @@
+module.exports = globalThis.CC_WORKER_FS_SYNC ? require("./fs-utils-sync.js") : require("./fs-utils-async.js");

adapters/platforms/wechat/res/workers/handlers.js

@@ -0,0 +1,6 @@
+const { registerHandler } = require("./ipc-worker.js");
+
+if (globalThis.CC_WORKER_ASSET_PIPELINE) {
+    const cacheManager = require("./cache-manager-worker.js");
+    registerHandler("cacheManager", cacheManager);
+}

adapters/platforms/wechat/res/workers/index.js

@@ -0,0 +1,6 @@
+require("./macro.js");
+const { init } = require("./ipc-worker.js");
+
+init(() => {
+    require("./handlers.js");
+});

adapters/platforms/wechat/res/workers/ipc-worker.js

@@ -0,0 +1,232 @@
+//
+// IPC 说明
+//
+// - 从主线程调用 Worker：
+//
+//      注册：
+//      1.在 worker 端调用 registerHandler(name, obj) 注册处理对象。
+//      2.所有非函数属性会生成 `get_xxx()`、`set_xxx(v)`、`write_xxx(v)` 三个函数，
+//        其中，`write_` 函数会在设置完毕后回调到主线程。
+//      3.所有函数属性请确保第一个参数是 callback，用于回调到主线程，
+//        用法是 callback(...args)。
+//      
+//      注册好函数后，在主线程通过 worker.name.key(args | null, (args)=>{}) 调用。
+//      注意在主线程调用时传入和返回的都是参数数组。
+//
+// - 从 Worker 调用 主线程：
+//
+//      注册：
+//      1.在 main 端调用 registerHandler(name, obj) 注册处理对象。
+//      2.所有非函数属性会生成 `get_xxx()`、`set_xxx(v)`、`write_xxx(v)` 三个函数，
+//        其中，`write_` 函数会在设置完毕后回调到 Worker。
+//      3.所有函数属性请确保参数是 [args, cmdId, callback]，用于回调到 Worker，
+//        用法是 callback(cmdId, args)。
+//        注意在主线程回调时传入的是参数数组。
+//      
+//      注册好函数后，在 Worker 通过 main.name.key(...args, (...args)=>{}) 调用。
+//      最后一个参数如果是函数的话则会当作 callback 处理。
+//
+
+const { CC_WORKER_SCHEDULER, CC_WORKER_DEBUG } = globalThis;
+
+
+var _inited = false;
+var _initCallback = null;
+
+var _cmdId = 0;
+var callbacks = {};
+
+var _cmd = 0;
+var handlers = {};
+
+function callToMain(cmd, args) {
+    const id = ++_cmdId;
+    args.unshift(id, cmd);
+
+    if (typeof args[args.length - 1] === "function") {
+        const callback = args.pop();
+        callbacks[id] = callback;
+    }
+
+    if (CC_WORKER_DEBUG) {
+        console.log("worker send call:", args);
+    }
+
+    if (CC_WORKER_SCHEDULER) {
+        sendScheduler.send(args);
+    } else {
+        worker.postMessage(args);
+    }
+}
+
+function callbackToMain(id, cmd, args) {
+    const msg = [id, cmd, args];
+    if (CC_WORKER_DEBUG) {
+        console.log("worker send callback:", msg);
+    }
+    if (CC_WORKER_SCHEDULER) {
+        sendScheduler.send(msg);
+    } else {
+        worker.postMessage(msg);
+    }
+}
+
+function registerHandler(name, obj) {
+    const descs = Object.getOwnPropertyDescriptors(obj);
+    for (const key in descs) {
+        const desc = descs[key];
+
+        if (typeof desc.value === "function") {
+            const cmd = ++_cmd;
+            handlers[cmd] = {
+                name,
+                key,
+                func: (id, cmd, args) => {
+                    obj[key](
+                        (...args) => {
+                            callbackToMain(id, cmd, args);
+                        },
+                        ...(args ? args : []),
+                    );
+                },
+            };
+        } else {
+            // getter/setter
+            let cmd = ++_cmd;
+            handlers[cmd] = {
+                name,
+                key: "get_" + key,
+                func: (id, cmd, args) => {
+                    callbackToMain(id, cmd, [obj[key]]);
+                }
+            };
+            cmd = ++_cmd;
+            handlers[cmd] = {
+                name,
+                key: "set_" + key,
+                func: (id, cmd, args) => {
+                    obj[key] = args ? args[0] : undefined;
+                }
+            };
+            cmd = ++_cmd;
+            handlers[cmd] = {
+                name,
+                key: "write_" + key,
+                func: (id, cmd, args) => {
+                    obj[key] = args ? args[0] : undefined;
+                    callbackToMain(id, cmd, null);
+                }
+            };
+        }
+    }
+}
+
+function init(callback) {
+    _initCallback = callback;
+
+    if (CC_WORKER_SCHEDULER) {
+        sendScheduler.init();
+    }
+
+    worker.onMessage(CC_WORKER_SCHEDULER
+        ? msgs => {
+            for (let index = 0; index < msgs.length; index++) {
+                const msg = msgs[index];
+                handleMainMessage(msg);
+            }
+        }
+        : handleMainMessage
+    );
+}
+
+function _initFromWorker(id, meta) {
+    const [
+        wrappers,
+        CC_WORKER_FS_SYNC,
+        CC_WORKER_ASSET_PIPELINE,
+    ] = meta;
+
+    for (const wrapper of wrappers) {
+        const { name, key, cmd } = wrapper;
+        if (!main[name]) {
+            main[name] = {};
+        }
+        main[name][key] = (...args) => {
+            callToMain(cmd, args);
+        };
+    }
+
+    globalThis.CC_WORKER_FS_SYNC = CC_WORKER_FS_SYNC;
+    globalThis.CC_WORKER_ASSET_PIPELINE = CC_WORKER_ASSET_PIPELINE;
+
+    _inited = true;
+    if (_initCallback) _initCallback();
+
+    const _handlers = [];
+    for (const cmd in handlers) {
+        const { name, key } = handlers[cmd];
+        _handlers.push({ name, cmd: Number(cmd), key });
+    }
+
+    callbackToMain(id, 0, _handlers);
+}
+
+function handleMainMessage(msg) {
+    // 格式：[id, cmd, [args]]
+    // 如果 cmd 是正数，则是主线程的调用
+    // 反之，是返回到 Worker 的 Callback
+
+    // [0, 0, meta] 为初始化调用
+
+    const id = msg[0];
+    const cmd = msg[1];
+    const args = msg[2];
+
+    if (cmd > 0) {
+        const handler = handlers[cmd];
+
+        if (handler) {
+            const { func, name, key } = handler;
+            if (CC_WORKER_DEBUG) {
+                console.log(`worker recv call (${name}.${key}):`, msg);
+            }
+            func(id, cmd, args);
+        } else {
+            console.error("worker recv unknown call:", msg);
+        }
+    } else if (cmd < 0) {
+        if (CC_WORKER_DEBUG) {
+            console.log("worker recv callback:", msg);
+        }
+        if (callbacks[id]) {
+            callbacks[id](msg.slice(2));
+            delete callbacks[id];
+        }
+    } else {
+        if (CC_WORKER_DEBUG) {
+            console.log("worker recv init:", msg);
+        }
+        _initFromWorker(id, args);
+    }
+}
+
+const sendScheduler = {
+    queue: [],
+
+    init() {
+        setInterval(() => {
+            if (this.queue.length > 0) {
+                worker.postMessage(this.queue);
+                this.queue = [];
+            }
+        }, 0);
+    },
+
+    send(msg) {
+        this.queue.push(msg);
+    },
+};
+
+const main = {};
+
+module.exports = { init, registerHandler, main };

adapters/platforms/wechat/res/workers/macro.js

@@ -0,0 +1,13 @@
+// 是否启用 Worker 调度模式，这会减少通信次数（必须一致）
+globalThis.CC_WORKER_SCHEDULER = true;
+
+// 是否启用 Worker 调试模式
+globalThis.CC_WORKER_DEBUG = true;
+
+// --- 以下从主线程同步值 ---
+
+// 是否启用 Worker 使用同步版本的文件系统 API
+globalThis.CC_WORKER_FS_SYNC = null;
+
+// 是否启用 Worker 驱动资源管线（下载、缓存）
+globalThis.CC_WORKER_ASSET_PIPELINE = null;

adapters/platforms/wechat/res/workers/path.js

@@ -0,0 +1,156 @@
+var EXTNAME_RE = /(\.[^\.\/\?\\]*)(\?.*)?$/;
+var DIRNAME_RE = /((.*)(\/|\\|\\\\))?(.*?\..*$)?/;
+var NORMALIZE_RE = /[^\.\/]+\/\.\.\//;
+
+/**
+ * !#en The module provides utilities for working with file and directory paths
+ * !#zh 用于处理文件与目录的路径的模块
+ * @class path
+ * @static
+ */
+var path = /** @lends cc.path# */{
+    /**
+     * !#en Join strings to be a path.
+     * !#zh 拼接字符串为 Path
+     * @method join
+     * @example {@link cocos2d/core/utils/CCPath/join.js}
+     * @returns {String}
+     */
+    join: function () {
+        var l = arguments.length;
+        var result = "";
+        for (var i = 0; i < l; i++) {
+            result = (result + (result === "" ? "" : "/") + arguments[i]).replace(/(\/|\\\\)$/, "");
+        }
+        return result;
+    },
+
+    /**
+     * !#en Get the ext name of a path including '.', like '.png'.
+     * !#zh 返回 Path 的扩展名，包括 '.'，例如 '.png'。
+     * @method extname
+     * @example {@link cocos2d/core/utils/CCPath/extname.js}
+     * @param {String} pathStr
+     * @returns {*}
+     */
+    extname: function (pathStr) {
+        var temp = EXTNAME_RE.exec(pathStr);
+        return temp ? temp[1] : '';
+    },
+
+    /**
+     * !#en Get the main name of a file name
+     * !#zh 获取文件名的主名称
+     * @method mainFileName
+     * @param {String} fileName
+     * @returns {String}
+     * @deprecated
+     */
+    mainFileName: function (fileName) {
+        if (fileName) {
+            var idx = fileName.lastIndexOf(".");
+            if (idx !== -1)
+                return fileName.substring(0, idx);
+        }
+        return fileName;
+    },
+
+    /**
+     * !#en Get the file name of a file path.
+     * !#zh 获取文件路径的文件名。
+     * @method basename
+     * @example {@link cocos2d/core/utils/CCPath/basename.js}
+     * @param {String} pathStr
+     * @param {String} [extname]
+     * @returns {*}
+     */
+    basename: function (pathStr, extname) {
+        var index = pathStr.indexOf("?");
+        if (index > 0) pathStr = pathStr.substring(0, index);
+        var reg = /(\/|\\)([^\/\\]+)$/g;
+        var result = reg.exec(pathStr.replace(/(\/|\\)$/, ""));
+        if (!result) return pathStr;
+        var baseName = result[2];
+        if (extname && pathStr.substring(pathStr.length - extname.length).toLowerCase() === extname.toLowerCase())
+            return baseName.substring(0, baseName.length - extname.length);
+        return baseName;
+    },
+
+    /**
+     * !#en Get dirname of a file path.
+     * !#zh 获取文件路径的目录名。
+     * @method dirname
+     * @example {@link cocos2d/core/utils/CCPath/dirname.js}
+     * @param {String} pathStr
+     * @returns {*}
+     */
+    dirname: function (pathStr) {
+        var temp = DIRNAME_RE.exec(pathStr);
+        return temp ? temp[2] : '';
+    },
+
+    /**
+     * !#en Change extname of a file path.
+     * !#zh 更改文件路径的扩展名。
+     * @method changeExtname
+     * @example {@link cocos2d/core/utils/CCPath/changeExtname.js}
+     * @param {String} pathStr
+     * @param {String} [extname]
+     * @returns {String}
+     */
+    changeExtname: function (pathStr, extname) {
+        extname = extname || "";
+        var index = pathStr.indexOf("?");
+        var tempStr = "";
+        if (index > 0) {
+            tempStr = pathStr.substring(index);
+            pathStr = pathStr.substring(0, index);
+        }
+        index = pathStr.lastIndexOf(".");
+        if (index < 0) return pathStr + extname + tempStr;
+        return pathStr.substring(0, index) + extname + tempStr;
+    },
+    /**
+     * !#en Change file name of a file path.
+     * !#zh 更改文件路径的文件名。
+     * @example {@link cocos2d/core/utils/CCPath/changeBasename.js}
+     * @param {String} pathStr
+     * @param {String} basename
+     * @param {Boolean} [isSameExt]
+     * @returns {String}
+     */
+    changeBasename: function (pathStr, basename, isSameExt) {
+        if (basename.indexOf(".") === 0) return this.changeExtname(pathStr, basename);
+        var index = pathStr.indexOf("?");
+        var tempStr = "";
+        var ext = isSameExt ? this.extname(pathStr) : "";
+        if (index > 0) {
+            tempStr = pathStr.substring(index);
+            pathStr = pathStr.substring(0, index);
+        }
+        index = pathStr.lastIndexOf("/");
+        index = index <= 0 ? 0 : index + 1;
+        return pathStr.substring(0, index) + basename + ext + tempStr;
+    },
+    //todo make public after verification
+    _normalize: function (url) {
+        var oldUrl = url = String(url);
+
+        //removing all ../
+        do {
+            oldUrl = url;
+            url = url.replace(NORMALIZE_RE, "");
+        } while (oldUrl.length !== url.length);
+        return url;
+    },
+
+    // The platform-specific file separator. '\\' or '/'.
+    sep: '/',
+
+    // @param {string} path
+    stripSep(path) {
+        return path.replace(/[\/\\]$/, '');
+    }
+};
+
+module.exports = path;