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

CLOCK_* constants for use with timerfd_create.

Variants (Non-exhaustive)

This enum is marked as 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

Returns a copy of the value. Read more

Performs copy-assignment from source. Read more

Formats the value using the given formatter. Read more

Feeds this value into the given Hasher. Read more

Feeds a slice of this type into the given Hasher. Read more

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

This method tests for !=.

Auto Trait Implementations

Blanket Implementations

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Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

The resulting type after obtaining ownership.

Creates owned data from borrowed data, usually by cloning. Read more

🔬 This is a nightly-only experimental API. (toowned_clone_into)

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The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.