Struct BackendSlot 

pub struct BackendSlot(/* private fields */);

An opaque, session-scoped name for one entry of the worker’s backend registry.

It is an index into Mux::backend_registry and nothing else: the core can carry it, compare it and hand it back, and cannot turn it into a Backend. Only the embedder resolves it, which is what keeps Rc<RefCell<Backend>> out of the core (#1340, Question 12).

Session-scoped rather than derived from (cluster_id, backend_id) on purpose. A reload that replaces a registry entry mid-session builds a NEW Rc, which takes a NEW slot, so connections opened before it keep charging the handle they were dialled against — exactly what holding the Rc inside Position::Client used to do. Keying on the backend’s name instead would split a balanced start/end pair across two Backend values: the superseded one would keep a charge forever and the fresh one would saturate at zero.

Trait Implementations

impl Clone for BackendSlot

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BackendSlot

impl Debug for BackendSlot

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

Formats the value using the given formatter.

impl Eq for BackendSlot

impl Hash for BackendSlot

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for BackendSlot

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

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

Restrict a value to a certain range.

impl PartialEq for BackendSlot

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for BackendSlot

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for BackendSlot