Struct EpochTracker 

pub struct EpochTracker { /* private fields */ }

Monotonic write-epoch tracker keyed by BlockKey.

Each call to record_write increments a global counter and associates the new epoch with the given key. Readers can later check whether their snapshot is stale via is_stale.

Implementations

impl EpochTracker

pub fn new() -> Self

Create a new tracker with epoch starting at 1.

pub fn record_write(&mut self, key: BlockKey) -> u64

Record a write for key, returning the new epoch number.

The epoch is strictly monotonically increasing across all keys.

pub fn check_epoch(&self, key: BlockKey) -> Option<u64>

Return the latest write epoch for key, if any write has been recorded.

pub fn is_stale(&self, key: BlockKey, read_epoch: u64) -> bool

Returns true if the block identified by key has been written after read_epoch, meaning the reader’s snapshot is stale.

Returns false if no write has been recorded for key (the key does not exist in the tracker).

Trait Implementations

impl Clone for EpochTracker

fn clone(&self) -> EpochTracker

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EpochTracker

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

Formats the value using the given formatter.

impl Default for EpochTracker

fn default() -> Self

Returns the “default value” for a type.