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CancelOnDrop

reth_tasks::cancel

Struct CancelOnDrop 

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pub struct CancelOnDrop(/* private fields */);
Expand description

Cancels execution on drop and supports cooperative finalization.

If dropped, it will set the cancelled flag to true.

This is most useful when a spawned job should stop once its owner goes away, e.g. a payload job or a blocking RPC call whose caller disconnected.

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impl CancelOnDrop

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pub fn is_interrupted(&self) -> bool

Returns true if the current work should be interrupted.

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pub fn is_cancelled(&self) -> bool

Returns true if the job was cancelled.

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pub fn request_finalization(&self)

Requests that the current work be finalized without cancelling it.

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pub fn is_finalization_requested(&self) -> bool

Returns true if finalization was requested.

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pub fn scope<R>(&self, f: impl FnOnce() -> R) -> R

Runs f with this as the cancellation state of the current thread, see is_cancelled.

This lets code deep inside f, such as a loop over transactions, observe cancellation without threading the CancelOnDrop through every call. The previous state of the thread is restored once f returns or unwinds. Leaving the scope does not cancel.

Trait Implementations§

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impl Clone for CancelOnDrop

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fn clone(&self) -> Self

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Debug for CancelOnDrop

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

Formats the value using the given formatter. Read more
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impl Default for CancelOnDrop

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fn default() -> Self

Returns the “default value” for a type. Read more
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impl Drop for CancelOnDrop

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fn drop(&mut self)

Executes the destructor for this type. Read more
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fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics #130494)
Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned. Read more

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit #126799)
Performs copy-assignment from self to dest. Read more
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Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 8 bytes