Struct PinWeak

pub struct PinWeak<T>(/* private fields */);

Safe Pinned Weak references.

Pin<Arc<T>> can’t be converted to/from Weak safely, because there is know way to know if a given weak reference came from a pinned Arc. This wraps the weak reference in a new type so we know that it came from a pinned Arc.

There is a pin-weak crate that provides this for std::sync::Arc, but not for the one in the portable-atomic-utils crate.

Implementations

impl<T> PinWeak<T>

pub fn downgrade(this: Pin<Arc<T>>) -> Self

Downgrade an Pin<Arc<T>> into a PinWeak.

This would be easier to use if it could be added to Arc.

pub fn upgrade(&self) -> Option<Pin<Arc<T>>>

Upgrade back to a Pin<Arc<T>>.