Enum rustix::time::TimerfdClockId

#[repr(u32)]
#[non_exhaustive]
pub enum TimerfdClockId {
    Realtime,
    Monotonic,
    Boottime,
    RealtimeAlarm,
    BoottimeAlarm,
}

Available on crate feature time only.

CLOCK_* constants for use with timerfd_create.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Realtime

CLOCK_REALTIME—A clock that tells the “real” time.

This is a clock that tells the amount of time elapsed since the Unix epoch, 1970-01-01T00:00:00Z. The clock is externally settable, so it is not monotonic. Successive reads may see decreasing times, so it isn’t reliable for measuring durations.

Monotonic

CLOCK_MONOTONIC—A clock that tells an abstract time.

Unlike Realtime, this clock is not based on a fixed known epoch, so individual times aren’t meaningful. However, since it isn’t settable, it is reliable for measuring durations.

This clock does not advance while the system is suspended; see Boottime for a clock that does.

Boottime

CLOCK_BOOTTIME—Like Monotonic, but advances while suspended.

This clock is similar to Monotonic, but does advance while the system is suspended.

RealtimeAlarm

CLOCK_REALTIME_ALARM—Like Realtime, but wakes a suspended system.

This clock is like Realtime, but can wake up a suspended system.

Use of this clock requires the CAP_WAKE_ALARM Linux capability.

BoottimeAlarm

CLOCK_BOOTTIME_ALARM—Like Boottime, but wakes a suspended system.

This clock is like Boottime, but can wake up a suspended system.

Use of this clock requires the CAP_WAKE_ALARM Linux capability.

Trait Implementations

impl Clone for TimerfdClockId

fn clone(&self) -> TimerfdClockId

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for TimerfdClockId

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Hash for TimerfdClockId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq<TimerfdClockId> for TimerfdClockId

fn eq(&self, other: &TimerfdClockId) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for TimerfdClockId

impl Eq for TimerfdClockId

impl StructuralEq for TimerfdClockId

impl StructuralPartialEq for TimerfdClockId