Struct SegmentId 

pub struct SegmentId(/* private fields */);

Monotonic identifier for a WAL segment file.

Allocation policy: ids start at 1 (SegmentId(0) is reserved as a “no segment” sentinel that callers should never encounter for a live WAL), and rotation simply does id + 1. Ids are stable: a truncated segment retains its id even after every preceding segment has been deleted.

Implementations

impl SegmentId

pub const FIRST: SegmentId

pub const fn new(value: u64) -> Self

pub const fn raw(self) -> u64

pub fn next(self) -> Self

pub fn saturating_prev(self) -> Self

Predecessor id, saturating at zero. Used for the “active and the segment immediately preceding it” tombstone-retention rule in crate::wal::Wal::truncate_up_to.

Trait Implementations

impl Clone for SegmentId

fn clone(&self) -> SegmentId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SegmentId

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

Formats the value using the given formatter.

impl Display for SegmentId

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

Formats the value using the given formatter.

impl Hash for SegmentId

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 Ord for SegmentId

fn cmp(&self, other: &SegmentId) -> 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 SegmentId

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

fn partial_cmp(&self, other: &SegmentId) -> 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 Copy for SegmentId

impl Eq for SegmentId

impl StructuralPartialEq for SegmentId