Struct HlcTimestamp 

#[repr(C, align(8))]
pub struct HlcTimestamp {
    pub physical: u64,
    pub logical: u64,
    pub node_id: u64,
}

Hybrid Logical Clock timestamp.

Composed of:

• Physical time (wall clock in microseconds since epoch)
• Logical counter (for events at same physical time)
• Node ID (for tie-breaking across nodes)

This struct is 24 bytes and cache-line friendly.

Fields

physical: u64

Physical time component (microseconds since UNIX epoch).

logical: u64

Logical counter for events at the same physical time.

node_id: u64

Node identifier for tie-breaking.

Implementations

impl HlcTimestamp

pub const fn new(physical: u64, logical: u64, node_id: u64) -> HlcTimestamp

Create a new HLC timestamp.

pub const fn zero() -> HlcTimestamp

Create a zero timestamp (minimum value).

pub fn now(node_id: u64) -> HlcTimestamp

Create a timestamp from the current wall clock.

pub const fn is_zero(&self) -> bool

Check if this timestamp is zero/uninitialized.

pub const fn as_micros(&self) -> u64

Get physical time as microseconds since epoch.

pub const fn as_millis(&self) -> u64

Get physical time as milliseconds since epoch.

pub const fn pack(&self) -> u128

Pack timestamp into a single u128 for atomic comparison. Format: [physical:64][logical:48][node_id:16]

pub const fn unpack(packed: u128) -> HlcTimestamp

Unpack timestamp from u128.

Trait Implementations

impl Archive for HlcTimestamp

where u64: Archive,

type Archived = ArchivedHlcTimestamp

The archived representation of this type.

type Resolver = HlcTimestampResolver

The resolver for this type. It must contain all the additional information from serializing needed to make the archived type from the normal type.

unsafe fn resolve( &self, pos: usize, resolver: <HlcTimestamp as Archive>::Resolver, out: *mut <HlcTimestamp as Archive>::Archived, )

Creates the archived version of this value at the given position and writes it to the given output.

impl AsBytes for HlcTimestamp

where u64: AsBytes, HasPadding<HlcTimestamp, ringkernel_core::::hlc::{impl#16}::{constant#0}>: ShouldBe<false>,

fn as_bytes(&self) -> &[u8]

Gets the bytes of this value.

fn as_bytes_mut(&mut self) -> &mut [u8]

where Self: FromBytes,

Gets the bytes of this value mutably.

fn write_to(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to bytes.

fn write_to_prefix(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to the prefix of bytes.

fn write_to_suffix(&self, bytes: &mut [u8]) -> Option<()>

Writes a copy of self to the suffix of bytes.

impl Clone for HlcTimestamp

fn clone(&self) -> HlcTimestamp

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for HlcTimestamp

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

Formats the value using the given formatter.

impl Default for HlcTimestamp

fn default() -> HlcTimestamp

Returns the “default value” for a type.

impl<__D> Deserialize<HlcTimestamp, __D> for <HlcTimestamp as Archive>::Archived

where __D: Fallible + ?Sized, u64: Archive, <u64 as Archive>::Archived: Deserialize<u64, __D>,

fn deserialize( &self, deserializer: &mut __D, ) -> Result<HlcTimestamp, <__D as Fallible>::Error>

Deserializes using the given deserializer

impl Display for HlcTimestamp

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

Formats the value using the given formatter.

impl FromBytes for HlcTimestamp

where u64: FromBytes,

fn ref_from(bytes: &[u8]) -> Option<&Self>

where Self: Sized,

Interprets the given bytes as a &Self without copying.

fn ref_from_prefix(bytes: &[u8]) -> Option<&Self>

where Self: Sized,

Interprets the prefix of the given bytes as a &Self without copying.

fn ref_from_suffix(bytes: &[u8]) -> Option<&Self>

where Self: Sized,

Interprets the suffix of the given bytes as a &Self without copying.

fn mut_from(bytes: &mut [u8]) -> Option<&mut Self>

where Self: Sized + AsBytes,

Interprets the given bytes as a &mut Self without copying.

fn mut_from_prefix(bytes: &mut [u8]) -> Option<&mut Self>

where Self: Sized + AsBytes,

Interprets the prefix of the given bytes as a &mut Self without copying.

fn mut_from_suffix(bytes: &mut [u8]) -> Option<&mut Self>

where Self: Sized + AsBytes,

Interprets the suffix of the given bytes as a &mut Self without copying.

fn slice_from(bytes: &[u8]) -> Option<&[Self]>

where Self: Sized,

Interprets the given bytes as a &[Self] without copying.

fn slice_from_prefix(bytes: &[u8], count: usize) -> Option<(&[Self], &[u8])>

where Self: Sized,

Interprets the prefix of the given bytes as a &[Self] with length equal to count without copying.

fn slice_from_suffix(bytes: &[u8], count: usize) -> Option<(&[u8], &[Self])>

where Self: Sized,

Interprets the suffix of the given bytes as a &[Self] with length equal to count without copying.

fn mut_slice_from(bytes: &mut [u8]) -> Option<&mut [Self]>

where Self: Sized + AsBytes,

Interprets the given bytes as a &mut [Self] without copying.

fn mut_slice_from_prefix( bytes: &mut [u8], count: usize, ) -> Option<(&mut [Self], &mut [u8])>

where Self: Sized + AsBytes,

Interprets the prefix of the given bytes as a &mut [Self] with length equal to count without copying.

fn mut_slice_from_suffix( bytes: &mut [u8], count: usize, ) -> Option<(&mut [u8], &mut [Self])>

where Self: Sized + AsBytes,

Interprets the suffix of the given bytes as a &mut [Self] with length equal to count without copying.

fn read_from(bytes: &[u8]) -> Option<Self>

where Self: Sized,

Reads a copy of Self from bytes.

fn read_from_prefix(bytes: &[u8]) -> Option<Self>

where Self: Sized,

Reads a copy of Self from the prefix of bytes.

fn read_from_suffix(bytes: &[u8]) -> Option<Self>

where Self: Sized,

Reads a copy of Self from the suffix of bytes.

impl FromZeroes for HlcTimestamp

where u64: FromZeroes,

fn zero(&mut self)

Overwrites self with zeroes.

fn new_zeroed() -> Self

where Self: Sized,

Creates an instance of Self from zeroed bytes.

impl Hash for HlcTimestamp

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

where __H: Hasher,

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 Ord for HlcTimestamp

fn cmp(&self, other: &HlcTimestamp) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq<ArchivedHlcTimestamp> for HlcTimestamp

where u64: Archive, <u64 as Archive>::Archived: PartialEq<u64>,

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialEq<HlcTimestamp> for ArchivedHlcTimestamp

where u64: Archive, <u64 as Archive>::Archived: PartialEq<u64>,

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialEq for HlcTimestamp

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl PartialOrd for HlcTimestamp

fn partial_cmp(&self, other: &HlcTimestamp) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

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

Tests less than (for self and other) and is used by the < operator.

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

Tests less than or equal to (for self and other) and is used by the <= operator.

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

Tests greater than (for self and other) and is used by the > operator.

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

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<__S> Serialize<__S> for HlcTimestamp

where __S: Fallible + ?Sized, u64: Serialize<__S>,

fn serialize( &self, serializer: &mut __S, ) -> Result<<HlcTimestamp as Archive>::Resolver, <__S as Fallible>::Error>

Writes the dependencies for the object and returns a resolver that can create the archived type.

impl Zeroable for HlcTimestamp

fn zeroed() -> Self

Calls zeroed.

impl Copy for HlcTimestamp

impl Eq for HlcTimestamp

impl Pod for HlcTimestamp

impl StructuralPartialEq for HlcTimestamp