Enum PidLiveness 

pub enum PidLiveness {
    Running,
    NotRunning,
    Indeterminate,
}

Tri-state PID liveness result.

Used to distinguish between definitive running/not-running states and indeterminate cases where we cannot determine the process status (e.g., permission errors, unsupported platforms).

Safety principle: Indeterminate liveness is treated conservatively as lock-owned to prevent concurrent supervisors and unsafe state cleanup.

Variants

Running

Process is definitely running.

NotRunning

Process is definitely not running (dead/zombie).

Indeterminate

Process status cannot be determined (permission error, unsupported platform).

Implementations

impl PidLiveness

pub fn is_definitely_not_running(self) -> bool

Returns true if the process is definitely not running.

Use this for stale detection: only treat a lock as stale when we have definitive evidence the owner is dead.

pub fn is_running_or_indeterminate(self) -> bool

Returns true if the process is running or status is indeterminate.

Use this for lock ownership checks: preserve locks when we cannot definitively prove the owner is dead.

Trait Implementations

impl Clone for PidLiveness

fn clone(&self) -> PidLiveness

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PidLiveness

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

Formats the value using the given formatter.

impl PartialEq for PidLiveness

fn eq(&self, other: &PidLiveness) -> 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 Copy for PidLiveness

impl Eq for PidLiveness

impl StructuralPartialEq for PidLiveness