1 #include <chrono> 2 #include <cstdio> 3 #include <sdeventplus/clock.hpp> 4 #include <sdeventplus/event.hpp> 5 #include <sdeventplus/source/time.hpp> 6 #include <string> 7 #include <utility> 8 9 using sdeventplus::Event; 10 using sdeventplus::source::Enabled; 11 12 constexpr auto clockId = sdeventplus::ClockId::RealTime; 13 using Clock = sdeventplus::Clock<clockId>; 14 using Time = sdeventplus::source::Time<clockId>; 15 16 int main(int argc, char* argv[]) 17 { 18 if (argc != 2) 19 { 20 fprintf(stderr, "Usage: %s [seconds]\n", argv[0]); 21 return 1; 22 } 23 24 unsigned interval = std::stoul(argv[1]); 25 fprintf(stderr, "Beating every %u seconds\n", interval); 26 27 auto event = Event::get_default(); 28 auto hbFunc = [interval](Time& source, Time::TimePoint time) { 29 printf("Beat\n"); 30 31 // Time sources are oneshot and are based on an absolute time 32 // we need to reconfigure the time source to go off again after the 33 // configured interval and re-enable it. 34 source.set_time(time + std::chrono::seconds{interval}); 35 source.set_enabled(Enabled::OneShot); 36 }; 37 Time time(event, Clock(event).now(), std::chrono::seconds{1}, 38 std::move(hbFunc)); 39 return event.loop(); 40 } 41