Class AsyncProgressWorkerBase

napi.h:3212–3260

};
template <typename DataType>
class AsyncProgressWorkerBase : public AsyncWorker {
 public:
  virtual void OnWorkProgress(DataType* data) = 0;
  class ThreadSafeData {
   public:
    ThreadSafeData(AsyncProgressWorkerBase* asyncprogressworker, DataType* data)
        : _asyncprogressworker(asyncprogressworker), _data(data) {}

    AsyncProgressWorkerBase* asyncprogressworker() {
      return _asyncprogressworker;
    }
    DataType* data() { return _data; }

   private:
    AsyncProgressWorkerBase* _asyncprogressworker;
    DataType* _data;
  };
  void OnWorkComplete(Napi::Env env, napi_status status) override;

 protected:
  explicit AsyncProgressWorkerBase(const Object& receiver,
                                   const Function& callback,
                                   const char* resource_name,
                                   const Object& resource,
                                   size_t queue_size = 1);
  virtual ~AsyncProgressWorkerBase();

// Optional callback of Napi::ThreadSafeFunction only available after
// NAPI_VERSION 4. Refs: https://github.com/nodejs/node/pull/27791
#if NAPI_VERSION > 4
  explicit AsyncProgressWorkerBase(Napi::Env env,
                                   const char* resource_name,
                                   const Object& resource,
                                   size_t queue_size = 1);
#endif

  static inline void OnAsyncWorkProgress(Napi::Env env,
                                         Napi::Function jsCallback,
                                         void* data);

  napi_status NonBlockingCall(DataType* data);

 private:
  ThreadSafeFunction _tsfn;
  bool _work_completed = false;
  napi_status _complete_status;
  static inline void OnThreadSafeFunctionFinalize(
      Napi::Env env, void* data, AsyncProgressWorkerBase* context);
};

template <class T>
class AsyncProgressWorker : public AsyncProgressWorkerBase<void> {