Enum Liveness 

pub enum Liveness {
    Live,
    Dead,
    Unknown,
}

Whether a process is provably still driving a run, provably not, or neither — see RunState::liveness. Serialized as a lowercase string ("live" / "dead" / "unknown") rather than a bool: a bool has no room for “could not tell”, and folding that case into either true or false is exactly the wrong call for a display an operator uses to decide whether to wait or to act — see the schema-10 field doc on RunState::driver_pid for the report it used to produce instead.

Variants

Live

Proven: a daemon’s heartbeat claims the run, or driver_pid answers alive under the same identity (driver_started_at) this run recorded for it.

Dead

Proven: no daemon claim, and either driver_pid answers dead outright or it answers alive under a different identity than recorded — a pid the OS has since handed to an unrelated process is exactly as good as proof the original driver is gone (see RunState::driver_started_at’s own doc).

Unknown

Neither proven — no daemon claim, and either no driver_pid to ask, the platform could not answer for it, or a live pid with nothing (or nothing queryable) to corroborate its identity against. Never treated as Dead: see RunState::liveness_with.

Trait Implementations

impl Clone for Liveness

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Liveness

impl Debug for Liveness

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Liveness

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

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Eq for Liveness

impl PartialEq for Liveness

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

Equality operator ==.

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

Inequality operator !=.

impl Serialize for Liveness

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 Liveness