pub struct JobCancellation { /* private fields */ }Expand description
Cooperative cancellation for one cancellable executor job.
One atomic state machine (pending → running → committed | cancelled) is
shared by the executor, the canceller, and the job. cancel and
try_seal_committed race through compare-exchange on the same cell, so
exactly one wins: a cancel that lands first makes the seal fail (the job
must abort before mutating), and a seal that lands first makes the cancel
report RunningCommitted (the mutation tail finishes normally). A job
observes cancellation only at its own checkpoints
(JobCancellation::cancel_requested_before_commit).
Implementations§
Source§impl JobCancellation
impl JobCancellation
Sourcepub fn try_seal_committed(&self) -> bool
pub fn try_seal_committed(&self) -> bool
Seal the job as committed. Returns false when a cancel already won
the race: the job must return early WITHOUT mutating, because the
canceller was told RunningSignalled and will discard its completion.
Sourcepub fn cancel_requested_before_commit(&self) -> bool
pub fn cancel_requested_before_commit(&self) -> bool
True when a cancel won the state race and the job must abort.
Trait Implementations§
Source§impl Clone for JobCancellation
impl Clone for JobCancellation
Source§fn clone(&self) -> JobCancellation
fn clone(&self) -> JobCancellation
Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source. Read moreAuto Trait Implementations§
impl Freeze for JobCancellation
impl RefUnwindSafe for JobCancellation
impl Send for JobCancellation
impl Sync for JobCancellation
impl Unpin for JobCancellation
impl UnsafeUnpin for JobCancellation
impl UnwindSafe for JobCancellation
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