Method get_time_us

src/platforms/stub/isr_stub.hpp:185–188

    TimerThreadManager& operator=(const TimerThreadManager&) = delete;

    static u64 get_time_us() FL_NOEXCEPT {
        auto tp = fl::chrono::steady_clock::now();
        return static_cast<u64>(tp.time_since_epoch().count());
    }

    void timer_thread_func() FL_NOEXCEPT {
        fl::unique_lock<fl::mutex> lock(mMutex) FL_NOEXCEPT;