Struct rama::graceful::ShutdownGuard

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

A guard, linked to a Shutdown struct, prevents the Shutdown::shutdown future from completing.

Can be cloned to create multiple ShutdownGuards and can be downgraded to a WeakShutdownGuard to no longer prevent the Shutdown::shutdown future from completing.

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impl ShutdownGuard

pub async fn cancelled(&self)

Returns a Future that gets fulfilled when cancellation (shutdown) is requested.

The future will complete immediately if the token is already cancelled when this method is called.

§Cancel safety

This method is cancel safe.

§Panics

This method panics if the iternal mutex is poisoned while being used.

pub fn spawn_task<T>(&self, task: T) -> JoinHandle<<T as Future>::Output>
where T: Future + Send + 'static, <T as Future>::Output: Send + 'static,

Returns a [crate::sync::JoinHandle] that can be awaited on to wait for the spawned task to complete. See [crate::sync::spawn] for more information.

pub fn into_spawn_task<T>(self, task: T) -> JoinHandle<<T as Future>::Output>
where T: Future + Send + 'static, <T as Future>::Output: Send + 'static,

Returns a Tokio [crate::sync::JoinHandle] that can be awaited on to wait for the spawned task (future) to complete. See [crate::sync::spawn] for more information.

In contrast to ShutdownGuard::spawn_task this method consumes the guard, ensuring the guard is dropped once the task future is fulfilled. ShutdownGuard::spawn_task: crate::ShutdownGuard::spawn_task

pub fn spawn_task_fn<F, T>(&self, task: F) -> JoinHandle<<T as Future>::Output>
where F: FnOnce(ShutdownGuard) -> T + Send + 'static, T: Future + Send + 'static, <T as Future>::Output: Send + 'static,

Returns a Tokio [crate::sync::JoinHandle] that can be awaited on to wait for the spawned task (fn) to complete. See [crate::sync::spawn] for more information.

pub fn into_spawn_task_fn<F, T>( self, task: F, ) -> JoinHandle<<T as Future>::Output>
where F: FnOnce(ShutdownGuard) -> T + Send + 'static, T: Future + Send + 'static, <T as Future>::Output: Send + 'static,

Returns a Tokio [crate::sync::JoinHandle] that can be awaited on to wait for the spawned task (fn) to complete. See [crate::sync::spawn] for more information.

In contrast to ShutdownGuard::spawn_task_fn this method consumes the guard, ensuring the guard is dropped once the task future is fulfilled. ShutdownGuard::spawn_task_fn: crate::ShutdownGuard::spawn_task_fn

pub fn downgrade(self) -> WeakShutdownGuard

Downgrades the guard to a WeakShutdownGuard, ensuring that the guard no longer prevents the Shutdown::shutdown future from completing.

pub fn clone_weak(&self) -> WeakShutdownGuard

Clones the guard as a WeakShutdownGuard, ensuring that the cloned guard does not prevent the Shutdown::shutdown future from completing.

Trait Implementations§

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impl Clone for ShutdownGuard

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fn clone(&self) -> ShutdownGuard

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

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

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

Formats the value using the given formatter. Read more
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impl Drop for ShutdownGuard

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fn drop(&mut self)

Executes the destructor for this type. Read more
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impl From<WeakShutdownGuard> for ShutdownGuard

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fn from(weak_guard: WeakShutdownGuard) -> ShutdownGuard

Converts to this type from the input type.

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🔬This is a nightly-only experimental API. (clone_to_uninit)
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