83     void postAt(nsecs_t time, F&& func) {  in postAt()  argument
84         enqueue(WorkItem{time, std::function<void()>(std::forward<F>(func))});  in postAt()
88     void postDelayed(nsecs_t delay, F&& func) {  in postDelayed()  argument
89         enqueue(WorkItem{clock::now() + delay, std::function<void()>(std::forward<F>(func))});  in postDelayed()
93     void post(F&& func) {  in post()  argument
94         postAt(0, std::forward<F>(func));  in post()
98     auto async(F&& func) -> std::future<decltype(func())> {
99         typedef std::packaged_task<decltype(func())()> task_t;
100         auto task = std::make_shared<task_t>(std::forward<F>(func));
106     auto runSync(F&& func) -> decltype(func()) {
107         std::packaged_task<decltype(func())()> task{std::forward<F>(func)};