Enum LockKind 

pub enum LockKind {
    Writer,
    Reader,
    WriterInProcess,
}

Lock category for Error::Busy. Three variants because the three categories of contention produce different operator guidance: a contended cross-process WRITER_LOCK means another process is writing; a contended WriterInProcess means another thread of the same process is writing; a contended reader lock is unusual (31 slots, shared) and indicates either a saturated 31+-process workload or a stale lock left by a frozen process.

Variants

Writer

Cross-process WRITER_LOCK at byte 96 of the <db>.obj-lock sidecar file.

Reader

Cross-process READER_LOCK byte (any slot in 97..128 of the <db>.obj-lock sidecar file).

WriterInProcess

In-process write mutex (a sibling thread is mid-write).

Trait Implementations

impl Clone for LockKind

fn clone(&self) -> LockKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LockKind

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LockKind

fn deserialize<__D>( __deserializer: __D, ) -> Result<LockKind, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for LockKind

fn eq(&self, other: &LockKind) -> 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 Serialize for LockKind

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

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Copy for LockKind

impl Eq for LockKind

impl StructuralPartialEq for LockKind