pub unsafe fn alarm(seconds: u32) -> u32
Expand description
Set an alarm clock for delivery of a signal.
§Example
use core::mem::size_of;
fn handle_alarm(signum: i32) {
assert_eq!(signum, nc::SIGALRM);
}
let sa = nc::sigaction_t {
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(nc::SIGALRM, &sa, &mut old_sa, size_of::<nc::sigset_t>()) };
assert!(ret.is_ok());
let remaining = unsafe { nc::alarm(1) };
let mask = nc::sigset_t::default();
let ret = unsafe { nc::rt_sigsuspend(&mask, size_of::<nc::sigset_t>()) };
assert_eq!(ret, Err(nc::EINTR));
assert_eq!(remaining, 0);