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native: Move from usleep() to nanosleep()

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Using nanosleep() allows us to gracefully recover from EINTR because on error it
fills in the second parameter with the remaining time to sleep.

Closes #12689
This commit is contained in:
Alex Crichton 2014-03-04 17:40:45 -08:00
parent 8334dd445f
commit d8bd8de82e
3 changed files with 22 additions and 6 deletions
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15
src/libnative/io/timer_timerfd.rs
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@ -23,8 +23,8 @@
//! why).
//!
//! As with timer_other, timers just using sleep() do not use the timerfd at
//! all. They remove the timerfd from the worker thread and then invoke usleep()
//! to block the calling thread.
//! all. They remove the timerfd from the worker thread and then invoke
//! nanosleep() to block the calling thread.
//!
//! As with timer_other, all units in this file are in units of millseconds.
@ -183,8 +183,15 @@ impl Timer {
}
pub fn sleep(ms: u64) {
// FIXME: this can fail because of EINTR, what do do?
let _ = unsafe { libc::usleep((ms * 1000) as libc::c_uint) };
let mut to_sleep = libc::timespec {
tv_sec: (ms / 1000) as libc::time_t,
tv_nsec: ((ms % 1000) * 1000000) as libc::c_long,
};
while unsafe { libc::nanosleep(&to_sleep, &mut to_sleep) } != 0 {
if os::errno() as int != libc::EINTR as int {
fail!("failed to sleep, but not because of EINTR?");
}
}
}
fn remove(&mut self) {