Struct AdmissionLease 

pub struct AdmissionLease {
    owner: Option<Arc<dyn AdmissionRelease>>,
    slot: usize,
}

Proof that a request is being served by a resident model, and that the runtime must not evict that model until the request is done.

Dropping the lease releases the slot. Every exit path a request has — normal completion, ?, client disconnect, panic unwind — runs Drop, so there is no path that leaks a reference and wedges the scheduler. This is the same guarantee, for the same reason, that the proxy’s connection registry gets from its own guard.

Not Clone: two owners would mean two releases for one acquisition.

Fields

owner: Option<Arc<dyn AdmissionRelease>>

slot: usize

Implementations

impl AdmissionLease

pub fn new(owner: Arc<dyn AdmissionRelease>, slot: usize) -> Self

Create a lease that releases slot on owner when dropped.

pub const fn detached() -> Self

A lease that owns nothing and releases nothing.

For runtimes with no resident set to account for — test doubles and the NoopModelRuntime — so they are not forced to implement a scheduler to satisfy the signature.

pub const fn slot(&self) -> usize

Which resident slot this lease is holding.

Trait Implementations

impl Debug for AdmissionLease

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

Formats the value using the given formatter.

impl Drop for AdmissionLease

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.