Struct ReadonlySnapshot 

pub struct ReadonlySnapshot { /* private fields */ }

A read-only snapshot of state at a specific point in time.

This snapshot cannot be used to modify state. Any attempts to write to state objects while this snapshot is active will fail.

Thread Safety

Contains Cell<T> and RefCell<T> which are not Send/Sync. This is safe because snapshots are stored in thread-local storage and never shared across threads. The Arc is used for cheap cloning within a single thread, not for cross-thread sharing.

Implementations

impl ReadonlySnapshot

pub fn new( id: SnapshotId, invalid: SnapshotIdSet, read_observer: Option<ReadObserver>, ) -> Arc<Self>

Create a new read-only snapshot.

pub fn snapshot_id(&self) -> SnapshotId

pub fn invalid(&self) -> SnapshotIdSet

pub fn read_only(&self) -> bool

pub fn root_readonly(&self) -> Arc<Self>

pub fn enter<T>(&self, f: impl FnOnce() -> T) -> T

pub fn take_nested_snapshot( &self, read_observer: Option<ReadObserver>, ) -> Arc<Self>

pub fn has_pending_changes(&self) -> bool

pub fn dispose(&self)

pub fn record_read(&self, state: &dyn StateObject)

pub fn record_write(&self, _state: Arc<dyn StateObject>)

pub fn is_disposed(&self) -> bool