Trait WeakKeepalive 

pub trait WeakKeepalive: Send + Sync {
    // Required method
    fn upgrade(&self) -> Option<Arc<dyn Keepalive>>;
}

Counterpart to Keepalive: a non-pinning reference to the same underlying resource that can be re-promoted to a Keepalive as long as the resource is still alive.

Required Methods

fn upgrade(&self) -> Option<Arc<dyn Keepalive>>

Re-acquire a strong Keepalive for the underlying resource, or None if the referent has gone away.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors