Struct LockerGuard 

pub struct LockerGuard { /* private fields */ }

RAII guard over a set of acquired locks. Drop releases every acquired resource in reverse-acquire order, so the common Global → Collection path releases Collection first then Global.

Implementations

impl LockerGuard

pub fn new(manager: Arc<LockManager>) -> LockerGuard

Start a new guard bound to the given manager. No locks are acquired yet — callers chain acquire calls.

pub fn acquire( &mut self, resource: Resource, mode: LockMode, ) -> Result<(), AcquireError>

Acquire a lock on resource with mode. Records the acquisition so drop can reverse it. Rejects illegal upgrades (already holding Exclusive, requesting Shared) with IncompatibleEscalation so bugs in the dispatch layer don’t silently downgrade.

pub fn held_count(&self) -> usize

Number of currently-held resources. Useful for lock-stats assertions in tests.

pub fn txn_id(&self) -> u64

The txn id this guard uses for underlying LockManager acquisitions. Exposed for lock-stats inspection in tests.

Trait Implementations

impl Drop for LockerGuard

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.