Struct SharedData

pub struct SharedData<T: AsRef<str>>(/* private fields */);

A VM ID local atomic field. Any WASM VM in the same VM ID can read or write to any key in it’s VM ID. SharedData cannot cross VM IDs.

Implementations

impl<T: AsRef<str>> SharedData<T>

pub fn from_key(key: T) -> Self

Create a new/reference an existing SharedData.

pub fn get(&self) -> Option<Vec<u8>>

Gets the value of the SharedData. Doesn’t return the check-and-set (CAS) number.

pub fn get_with_cas(&self) -> (Option<Vec<u8>>, Option<u32>)

Gets the value and the check-and-set (CAS) number of the SharedData. CAS is None when the value has never been set before.

pub fn set(&self, value: impl AsRef<[u8]>)

Unconditionally sets the value of this SharedData.

pub fn set_with_cas(&self, value: impl AsRef<[u8]>, cas: u32) -> bool

Sets the value of this SharedData only when the given cas number matches the one returned by a previous get_with_cas.

Trait Implementations

impl<T: Clone + AsRef<str>> Clone for SharedData<T>

fn clone(&self) -> SharedData<T>

Returns a copy of the value.

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

Performs copy-assignment from source.