Struct Snapshot 

pub struct Snapshot<T> { /* private fields */ }

Lock-light snapshot container.

Implementations

impl<T> Snapshot<T>

pub fn new(value: T) -> Self

pub fn load(&self) -> Arc<T>

Cheap clone of the current snapshot. Holds the read lock only long enough to clone the Arc.

pub fn store(&self, value: T)

Replace the snapshot wholesale. Existing readers keep their old Arc until they drop it.

pub fn rcu<F>(&self, f: F)

where F: FnOnce(&T) -> T,

Compute a new value from the current and store it. Equivalent to store(f(load())) but holds the write lock for the whole duration so readers see a consistent transition.

Trait Implementations

impl<T: Default> Default for Snapshot<T>

fn default() -> Self

Returns the “default value” for a type.