Struct PromiseRecord 

pub struct PromiseRecord {
    pub id: PromiseId,
    pub state: PromiseState,
    pub waiters: u32,
    pub lane: u64,
}

Provider-side record of one promise.

Fields

id: PromiseId

Kernel-assigned identifier.

state: PromiseState

Current state (pending until the producing call settles).

waiters: u32

Calls waiting on this promise (derived, informational).

lane: u64

Lane that issued the producing call.

Implementations

impl PromiseRecord

pub fn new(id: PromiseId, lane: u64) -> Self

Create a pending record for id, owned by lane.

pub fn resolve(&mut self, value: Value) -> Result<()>

Resolve once.

pub fn reject(&mut self, error: Error) -> Result<()>

Reject once.

pub fn cancel(&mut self) -> Result<()>

Cancel a pending promise.

pub fn value(&self) -> Result<Value>

The settled value, or an error describing why it is not available.

Trait Implementations

impl Clone for PromiseRecord

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PromiseRecord

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for PromiseRecord

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for PromiseRecord