1 #include <chrono> 2 #include <cstdio> 3 #include <sdeventplus/clock.hpp> 4 #include <sdeventplus/event.hpp> 5 #include <sdeventplus/source/signal.hpp> 6 #include <sdeventplus/source/time.hpp> 7 #include <stdplus/signal.hpp> 8 #include <string> 9 #include <utility> 10 11 using sdeventplus::Event; 12 using sdeventplus::source::Enabled; 13 using sdeventplus::source::Signal; 14 15 constexpr auto clockId = sdeventplus::ClockId::RealTime; 16 using Clock = sdeventplus::Clock<clockId>; 17 using Time = sdeventplus::source::Time<clockId>; 18 19 void intCb(Signal& signal, const struct signalfd_siginfo*) 20 { 21 printf("Exiting\n"); 22 signal.get_event().exit(0); 23 } 24 25 int main(int argc, char* argv[]) 26 { 27 if (argc != 2) 28 { 29 fprintf(stderr, "Usage: %s [seconds]\n", argv[0]); 30 return 1; 31 } 32 33 unsigned interval = std::stoul(argv[1]); 34 fprintf(stderr, "Beating every %u seconds\n", interval); 35 36 auto event = Event::get_default(); 37 auto hbFunc = [interval](Time& source, Time::TimePoint time) { 38 printf("Beat\n"); 39 40 // Time sources are oneshot and are based on an absolute time 41 // we need to reconfigure the time source to go off again after the 42 // configured interval and re-enable it. 43 source.set_time(time + std::chrono::seconds{interval}); 44 source.set_enabled(Enabled::OneShot); 45 }; 46 Time time(event, Clock(event).now(), std::chrono::seconds{1}, 47 std::move(hbFunc)); 48 stdplus::signal::block(SIGINT); 49 Signal signal(event, SIGINT, intCb); 50 return event.loop(); 51 } 52