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#[cfg(feature = "thread")]
use rustix::thread::nanosleep;
use rustix::time::{clock_gettime, ClockId, Timespec};
/// Attempt to test that the monotonic clock is monotonic. Time may or may not
/// advance, but it shouldn't regress.
#[test]
fn test_monotonic_clock() {
let a = clock_gettime(ClockId::Monotonic);
let b = clock_gettime(ClockId::Monotonic);
if b.tv_sec == a.tv_sec {
assert!(b.tv_nsec >= a.tv_nsec);
} else {
assert!(b.tv_sec > a.tv_sec);
}
}
/// With the "thread" feature, we can sleep so that we're guaranteed that time
/// has advanced.
#[cfg(feature = "thread")]
#[test]
fn test_monotonic_clock_with_sleep_1s() {
let a = clock_gettime(ClockId::Monotonic);
let _rem = nanosleep(&Timespec {
tv_sec: 1,
tv_nsec: 0,
});
let b = clock_gettime(ClockId::Monotonic);
assert!(b.tv_sec > a.tv_sec);
}
/// With the "thread" feature, we can sleep so that we're guaranteed that time
/// has advanced.
#[cfg(feature = "thread")]
#[test]
fn test_monotonic_clock_with_sleep_1ms() {
let a = clock_gettime(ClockId::Monotonic);
let _rem = nanosleep(&Timespec {
tv_sec: 0,
tv_nsec: 1_000_000,
});
let b = clock_gettime(ClockId::Monotonic);
assert!(b.tv_sec >= a.tv_sec);
assert!(b.tv_sec != a.tv_sec || b.tv_nsec > a.tv_nsec);
}
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