Method do_loop

tee/cocoon/FwdProxy.cpp:198–206

  }

  td::Status do_loop() {
    TRY_STATUS(td::loop_read("left", pipe_));
    auto status = run();
    if (status.code() != WaitCode) {
      return status;
    }
    TRY_STATUS(td::loop_write("left", pipe_));
    return td::Status::OK();
  }

  td::actor::Task<Action> task_loop_once() override {
    co_await do_loop();