Function from_timeval

crates/vm/src/stdlib/time.rs:1339–1346

(tv: libc::timeval, vm: &VirtualMachine)

    pub(super) fn get_process_time(vm: &VirtualMachine) -> PyResult<Duration> {
        use nix::sys::resource::{UsageWho, getrusage};
        fn from_timeval(tv: libc::timeval, vm: &VirtualMachine) -> PyResult<i64> {
            (|tv: libc::timeval| {
                let t = tv.tv_sec.checked_mul(SEC_TO_NS)?;
                let u = (tv.tv_usec as i64).checked_mul(US_TO_NS)?;
                t.checked_add(u)
            })(tv)
            .ok_or_else(|| vm.new_overflow_error("timestamp too large to convert to i64"))
        }
        let ru = getrusage(UsageWho::RUSAGE_SELF).map_err(|e| e.into_pyexception(vm))?;
        let utime = from_timeval(ru.user_time().into(), vm)?;
        let stime = from_timeval(ru.system_time().into(), vm)?;