Struct LockManager 

pub struct LockManager { /* private fields */ }

The key and predicate lock manager. Cheap to share: all state lives behind one mutex and one condition variable.

Implementations

impl LockManager

pub fn new() -> Self

pub fn acquire( &self, key: LockKey, request: LockRequest, ) -> Result<(), LockError>

Acquires key for request.txn_id, blocking until granted, doomed, cancelled, or past the deadline. See the module docs for the re-entrancy, upgrade, fairness, and deadlock rules.

pub fn release(&self, txn_id: u64, key: &LockKey)

Releases every hold txn_id has on key, granting queued waiters. Releasing a key the transaction does not hold is a no-op.

pub fn release_all(&self, txn_id: u64)

Releases every hold and pending wait of txn_id; called exactly once when the transaction ends, including on abort as a deadlock victim.

pub fn holds(&self, txn_id: u64, key: &LockKey) -> bool

Whether txn_id currently holds any mode on key.

Trait Implementations

impl Debug for LockManager

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

Formats the value using the given formatter.

impl Default for LockManager

fn default() -> Self

Returns the “default value” for a type.