Function timer_settime

pub unsafe fn timer_settime(
    timer_id: i32,
    flags: i32,
    new_value: &itimerspec_t,
    old_value: Option<&mut itimerspec_t>,
) -> Result<(), i32> 

Available on crate feature dep_nc only.

Arm/disarm state of per-process timer.

Examples

const TIMER_SIG: i32 = nc::SIGRTMAX;

fn handle_alarm(signum: i32) {
    assert_eq!(signum, TIMER_SIG);
}

fn main() {
    #[cfg(nc_has_sa_restorer)]
    let sa = nc::sigaction_t {
        sa_handler: handle_alarm as nc::sighandler_t,
        sa_flags: nc::SA_RESTORER | nc::SA_RESTART,
        sa_restorer: nc::restore::get_sa_restorer(),
        ..nc::sigaction_t::default()
    };
    #[cfg(not(nc_has_sa_restorer))]
    let sa = nc::sigaction_t {
        sa_handler: handle_alarm as nc::sighandler_t,
        sa_flags: nc::SA_RESTART,
        ..nc::sigaction_t::default()
    };
    let ret = unsafe { nc::rt_sigaction(TIMER_SIG, Some(&sa), None) };
    assert!(ret.is_ok());

    let tid = nc::itimerspec_t {
        it_interval: nc::timespec_t::default(),
        it_value: nc::timespec_t {
            tv_sec: 1,
            tv_nsec: 0,
        },
    };
    let mut ev = nc::sigevent_t {
        sigev_value: nc::sigval_t {
            sival_ptr: &tid as *const nc::itimerspec_t as usize,
        },
        sigev_signo: TIMER_SIG,
        sigev_notify: nc::SIGEV_SIGNAL,
        sigev_un: nc::sigev_un_t::default(),
    };
    let mut timer_id = nc::timer_t::default();
    let ret = unsafe { nc::timer_create(nc::CLOCK_MONOTONIC, Some(&mut ev), &mut timer_id) };
    assert!(ret.is_ok());
    println!("timer id: {:?}", timer_id);

    let flags = 0;
    let time = nc::itimerspec_t {
        it_interval: nc::timespec_t::default(),
        it_value: nc::timespec_t {
            tv_sec: 1,
            tv_nsec: 0,
        },
    };
    let ret = unsafe { nc::timer_settime(timer_id, flags, &time, None) };
    assert!(ret.is_ok());

    let mut cur_time = nc::itimerspec_t::default();
    let ret = unsafe { nc::timer_gettime(timer_id, &mut cur_time) };
    assert!(ret.is_ok());
    println!("cur time: {:?}", cur_time);

    let mask = nc::sigset_t::default();
    let _ret = unsafe { nc::rt_sigsuspend(&mask) };

    let ret = unsafe { nc::timer_delete(timer_id) };
    assert!(ret.is_ok());
}