Struct state_store::SSCached

pub struct SSCached<S: Any>(/* private fields */);

A thread-safe cached reference to a system-wide state. Internally, this contains a Weak pointer to S, which is upgraded / updated whenenver the caller invokes get().

Implementations

impl<S: Any> SSCached<S>

pub fn get(&self) -> Option<Arc<S>>

Tries to upgrade the internal Weak pointer to a Strong (Arc) pointer. If successful, the weak pointer is still valid, so we return the Arc<S>. If not, the current internal Weak reference is None, so we try to reaquire it. If it cannot be reacquired, there is currently not a system-wide state of type S, so we return None.