zeitstempel/
linux.rs

1const NS_PER_S: u64 = 1_000_000_000;
2
3fn timespec_to_ns(ts: libc::timespec) -> u64 {
4    (ts.tv_sec as u64) * NS_PER_S + (ts.tv_nsec as u64)
5}
6
7/// The time from a clock that cannot be set
8/// and represents monotonic time since some unspecified starting point,
9/// that also includes any time that the system is suspended.
10///
11/// See [`clock_gettime`].
12///
13/// [`clock_gettime`]: https://manpages.debian.org/buster/manpages-dev/clock_gettime.3.en.html
14pub fn now_including_suspend() -> u64 {
15    let mut ts = libc::timespec {
16        tv_sec: 0,
17        tv_nsec: 0,
18    };
19    unsafe {
20        libc::clock_gettime(libc::CLOCK_BOOTTIME, &mut ts);
21    }
22
23    timespec_to_ns(ts)
24}