Method registerAsyncServerFunc

web/src/runtime.ts:1808–1829

* Register an asyncfunction to be global function in the server. * * @param name The name of the function. * @param func function to be registered. * @param override Whether overwrite function in existing registry. * * Note: The async function will only be used for serving remote

(
    name: string,
    func: Function,
    override = false
  )

   * These functions contains explicit continuation
   */
  registerAsyncServerFunc(
    name: string,
    func: Function,
    override = false
  ): void {
    const asyncVariant = (...args: Array<any>): void => {
      const fargs = args.slice(0, args.length - 1);
      // need to keep it alive until callback is fulfilled.
      const callback = this.detachFromCurrentScope(args[args.length - 1] as PackedFunc);
      const promise: Promise<any> = func(...fargs);
      const onFulfilled = (rv: any) => {
        callback(this.scalar(AsyncCallbackCode.kReturn, "int32"), rv);
        callback.dispose();
      };
      const onRejected = (reason: any) => {
        callback(this.scalar(AsyncCallbackCode.kException, "int32"), reason.toString());
        callback.dispose();
      };
      promise.then(onFulfilled, onRejected);
    };
    this.registerFunc("__async." + name, asyncVariant, override);
  }

  /**
   * Asynchronously load webgpu pipelines when possible.