include time include signal int main sigevent event event sigev_notify

#include <time.h>
#include <signal.h>

int main()
{
sigevent event;
event.sigev_notify = SIGEV_SIGNAL;
event.sigev_signo = SIGUSR1;
timer_t tid;
timer_create(clock_id, &event, &tid);
itime.it_value.tv_sec = 0;
itime.it_value.tv_nsec = 500000000;
itime.it_interval.tv_sec = 0;
itime.it_interval.tv_nsec = 500000000;
timer_settime(tid, 0, &itime, NULL)

}

void signal_handler(int signo, siginfo_t* info, void* other)
{
    if (signo != SIGUSR1) return;
    switch(info->si_code)
    {
        case SI_TIMER:
            std::cout << "Handler!" << std::endl;
            return;
    }
    std::cout << "How i did occure here?" << std::endl;
}