Struct tokio::task::AbortHandle

pub struct AbortHandle {
    raw: RawTask,
}

An owned permission to abort a spawned task, without awaiting its completion.

Unlike a JoinHandle, an AbortHandle does not represent the permission to await the task’s completion, only to terminate it.

The task may be aborted by calling the AbortHandle::abort method. Dropping an AbortHandle releases the permission to terminate the task — it does not abort the task.

Be aware that tasks spawned using spawn_blocking cannot be aborted because they are not async. If you call abort on a spawn_blocking task, then this will not have any effect, and the task will continue running normally. The exception is if the task has not started running yet; in that case, calling abort may prevent the task from starting.

Fields

raw: RawTask

Implementations

impl AbortHandle

pub(super) fn new(raw: RawTask) -> Self

pub fn abort(&self)

Abort the task associated with the handle.

Awaiting a cancelled task might complete as usual if the task was already completed at the time it was cancelled, but most likely it will fail with a cancelled JoinError.

If the task was already cancelled, such as by JoinHandle::abort, this method will do nothing.

Be aware that tasks spawned using spawn_blocking cannot be aborted because they are not async. If you call abort on a spawn_blocking task, then this will not have any effect, and the task will continue running normally. The exception is if the task has not started running yet; in that case, calling abort may prevent the task from starting.

See also the module level docs for more information on cancellation.

pub fn is_finished(&self) -> bool

Checks if the task associated with this AbortHandle has finished.

Please note that this method can return false even if abort has been called on the task. This is because the cancellation process may take some time, and this method does not return true until it has completed.

pub fn id(&self) -> Id

Returns a task ID that uniquely identifies this task relative to other currently spawned tasks.

Trait Implementations

impl Clone for AbortHandle

fn clone(&self) -> Self

Returns a cloned AbortHandle that can be used to remotely abort this task.

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

Performs copy-assignment from source.

impl Debug for AbortHandle

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

Formats the value using the given formatter.

impl Drop for AbortHandle

fn drop(&mut self)

Executes the destructor for this type.

impl RefUnwindSafe for AbortHandle

impl Send for AbortHandle

impl Sync for AbortHandle

impl UnwindSafe for AbortHandle