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TryLockError

headless_lms_server::prelude::tokio::sync

Struct TryLockError

pub struct TryLockError(pub(super) ());

Expand description

Error returned from the Mutex::try_lock, RwLock::try_read and RwLock::try_write functions.

Mutex::try_lock operation will only fail if the mutex is already locked.

RwLock::try_read operation will only fail if the lock is currently held by an exclusive writer.

RwLock::try_write operation will only fail if the lock is currently held by any reader or by an exclusive writer.

Tuple Fields§

§0: ()

Trait Implementations§

impl Debug for TryLockError

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

Formats the value using the given formatter. Read more

impl Display for TryLockError

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

Formats the value using the given formatter. Read more

impl Error for TryLockError

1.30.0 · Source§

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any. Read more

1.0.0 · Source§

fn description(&self) -> &str

👎Deprecated since 1.42.0: use the Display impl or to_string()

1.0.0 · Source§

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0: replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

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

Provides type-based access to context intended for error reports. Read more

Auto Trait Implementations§

impl Freeze for TryLockError

impl RefUnwindSafe for TryLockError

impl Send for TryLockError

impl Sync for TryLockError

impl Unpin for TryLockError

impl UnsafeUnpin for TryLockError

impl UnwindSafe for TryLockError

Blanket Implementations§

impl<T> Any for T
where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more

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where T: ?Sized,

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Immutably borrows from an owned value. Read more

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more

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fn from(t: T) -> T

Returns the argument unchanged.

impl<T> FutureExt for T

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fn instrument(self, span: Span) -> Instrumented<Self> ⓘ

Instruments this type with the provided [Span], returning an Instrumented wrapper. Read more

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Instruments this type with the current Span, returning an Instrumented wrapper. Read more

impl<E> InstrumentError for E
where TracedError<E>: From<E>,

type Instrumented = TracedError<E>

The type of the wrapped error after instrumentation

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Instrument an Error by bundling it with a SpanTrace Read more

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where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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fn into_either(self, into_left: bool) -> Either<Self, Self> ⓘ

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

fn into_either_with<F>(self, into_left: F) -> Either<Self, Self> ⓘ
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

impl<T> IntoRequest<T> for T

fn into_request(self) -> Request<T>

Wrap the input message T in a tonic::Request

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fn named_layer<S>(&self, service: S) -> Layered<<L as Layer<S>>::Service, S>
where L: Layer<S>,

Applies the layer to a service and wraps it in [Layered].

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const ALIGN: usize

The alignment of pointer.

type Init = T

The type for initializers.

unsafe fn init(init: <T as Pointable>::Init) -> usize

Initializes a with the given initializer. Read more

unsafe fn deref<'a>(ptr: usize) -> &'a T

Dereferences the given pointer. Read more

unsafe fn deref_mut<'a>(ptr: usize) -> &'a mut T

Mutably dereferences the given pointer. Read more

unsafe fn drop(ptr: usize)

Drops the object pointed to by the given pointer. Read more

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where T: ?Sized,

fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns [Action::Follow] only if self and other return Action::Follow. Read more

fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns [Action::Follow] if either self or other returns Action::Follow. Read more

impl<T> Same for T

type Output = T

Should always be Self

impl<T> ServiceExt for T

fn map_response_body<F>(self, f: F) -> MapResponseBody<Self, F>
where Self: Sized,

Apply a transformation to the response body. Read more

fn decompression(self) -> Decompression<Self>
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Decompress response bodies. Read more

fn trace_for_http(self) -> Trace<Self, SharedClassifier<ServerErrorsAsFailures>>
where Self: Sized,

High level tracing that classifies responses using HTTP status codes. Read more

fn trace_for_grpc(self) -> Trace<Self, SharedClassifier<GrpcErrorsAsFailures>>
where Self: Sized,

High level tracing that classifies responses using gRPC headers. Read more

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where Self: Sized,

Follow redirect resposes using the Standard policy. Read more

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fn to_string(&self) -> String

Converts the given value to a String. Read more

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ToString::to_string, but without panic on OOM.

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type Error = Infallible

The type returned in the event of a conversion error.

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Performs the conversion.

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.

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where T: 'static,