Struct CapRef 

pub struct CapRef { /* private fields */ }

Cache-local lifetime handle to a working Cap::Instance in CacheDirectory.instances.

Clone bumps an inner Arc refcount; Drop decrements it. The directory owns one CapRef per live entry alongside the data; when external holders all drop their clones, CacheDirectory::sweep_instances finds entries whose stored handle has strong_count == 1 and removes them. No callback-on-drop, no deadlock discipline.

Two separate CacheDirectory instances produce independent id namespaces — CapRefs must not cross caches.

The constructor is module-private: every handle in production traces back to CacheDirectory::put_instance.

Implementations

impl CapRef

pub fn id(&self) -> u64

The id this handle resolves to inside CacheDirectory.instances.

pub fn strong_count(&self) -> usize

Number of live CapRef clones for this id, including the directory’s own self-reference. sweep_instances reclaims entries whose stored handle has strong_count == 1.

Trait Implementations

impl Clone for CapRef

fn clone(&self) -> CapRef

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for CapRef

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

Formats the value using the given formatter.

impl Hash for CapRef

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 PartialEq for CapRef

fn eq(&self, other: &Self) -> 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 Eq for CapRef