Struct Hlc 

pub struct Hlc {
    pub physical_ms: u64,
    pub logical: u16,
    pub replica_id: ReplicaId,
}

A Hybrid Logical Clock timestamp.

Total order: (physical_ms, logical, replica_id.0) lexicographic. This order is also the byte order produced by Hlc::to_bytes.

Fields

physical_ms: u64

Wall-clock milliseconds since Unix epoch at the originating replica. Valid range: 0..=MAX_PHYSICAL_MS.

logical: u16

Monotonic counter within a single millisecond on one replica.

replica_id: ReplicaId

Stable identity of the replica that generated this timestamp.

Implementations

impl Hlc

pub const ZERO: Self

The bottom of the total order; useful as a “no ops seen yet” sentinel.

pub fn new( physical_ms: u64, logical: u16, replica_id: ReplicaId, ) -> ArrayResult<Self>

Construct a new Hlc, returning an error if physical_ms exceeds MAX_PHYSICAL_MS.

pub fn to_bytes(&self) -> [u8; 18]

Encode as 18 bytes in big-endian order for stable byte-comparable sort.

Layout: physical_ms (8 bytes) | logical (2 bytes) | replica_id (8 bytes).

pub fn from_bytes(b: &[u8; 18]) -> Self

Decode from a 18-byte big-endian slice produced by Hlc::to_bytes.

No range validation is performed; the caller should use Hlc::new if validation is required.

Trait Implementations

impl Clone for Hlc

fn clone(&self) -> Hlc

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Hlc

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Hlc

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl<'__msgpack_de> FromMessagePack<'__msgpack_de> for Hlc

fn read<R: Read<'__msgpack_de>>(reader: &mut R) -> Result<Self, Error>

where Self: Sized,

Reads the MessagePack representation of this value from the provided reader.

impl Ord for Hlc

fn cmp(&self, other: &Self) -> 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 for Hlc

fn eq(&self, other: &Hlc) -> 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 Hlc

fn partial_cmp(&self, other: &Self) -> 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 Serialize for Hlc

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl ToMessagePack for Hlc

fn write<W: Write>(&self, writer: &mut W) -> Result<(), Error>

Writes the MessagePack representation of this value into the provided writer.

impl Copy for Hlc

impl Eq for Hlc

impl StructuralPartialEq for Hlc