Enum IsolationKey 

pub enum IsolationKey {
    Thread(String),
    LocalHead {
        scope: String,
    },
    StateVisibility(StateId),
}

Logical key used by conditional transaction commits to detect intervening same-thread changes.

Variants

Thread(String)

LocalHead

Fields

scope: String

StateVisibility(StateId)

Per-state visibility key (heddle#317). Every StateVisibilitySet / StateVisibilityPromote record on a state contributes this key, so a visibility mutation on state S conflicts with an in-flight undo/redo of a visibility batch that also touched S. Without it a visibility record would contribute no isolation key, and an undo could restore an older prior_sidecar over a concurrently-committed newer visibility record, silently discarding it. Keyed by the state’s StateId, so visibility mutations on different states never spuriously conflict.

Trait Implementations

impl Clone for IsolationKey

fn clone(&self) -> IsolationKey

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IsolationKey

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for IsolationKey

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for IsolationKey

impl Ord for IsolationKey

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

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

Equality operator ==.

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

Inequality operator !=.

impl PartialOrd for IsolationKey

fn partial_cmp(&self, other: &IsolationKey) -> 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 IsolationKey

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl StructuralPartialEq for IsolationKey