Function nc::call::timer_settime
source · pub unsafe fn timer_settime(
timer_id: timer_t,
flags: i32,
new_value: &itimerspec_t,
old_value: Option<&mut itimerspec_t>
) -> Result<(), Errno>
Expand description
Arm/disarm state of per-process timer.
§Example
use core::mem::size_of;
fn handle_alarm(signum: i32) {
assert_eq!(signum, nc::SIGALRM);
}
fn main() {
const TIMER_SIG: i32 = nc::SIGRTMAX;
let sa = nc::sigaction_t {
sa_flags: nc::SA_SIGINFO,
sa_handler: handle_alarm as nc::sighandler_t,
..nc::sigaction_t::default()
};
let mut old_sa = nc::sigaction_t::default();
let ret = unsafe { nc::rt_sigaction(TIMER_SIG, &sa, &mut old_sa, size_of::<nc::sigset_t>()) };
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, size_of::<nc::sigset_t>()) };
let ret = unsafe { nc::timer_delete(timer_id) };
assert!(ret.is_ok());
}