Function alarm

pub unsafe fn alarm(seconds: u32) -> Result<u32, i32> 

Available on crate feature dep_nc only.

Set an alarm clock for delivery of a signal.

Examples

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

#[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(nc::SIGALRM, Some(&sa), None) };
assert!(ret.is_ok());
let remaining = unsafe { nc::alarm(1) };
let mask = nc::sigset_t::default();
let ret = unsafe { nc::rt_sigsuspend(&mask) };
assert_eq!(ret, Err(nc::EINTR));
assert_eq!(remaining, Ok(0));