Enum PollRequestError 

#[non_exhaustive]
pub enum PollRequestError {
    WrongOwner,
    WrongKind,
    AlreadyCompleted,
    StaleGeneration,
    RecoveryFailed,
}

Error returned when a request is polled through the wrong handle or after its terminal state.

Unlike RequestPoll::Ready, this is not a transfer terminal state for the request payload. Implementations must not report a terminal RequestPoll::Ready error until the controller is no longer accessing the transaction buffer.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

WrongOwner

WrongKind

AlreadyCompleted

StaleGeneration

RecoveryFailed

Recovery could not be reported through the requested handle.

Safe host implementations must still quiesce the hardware before any request object that borrows caller memory can be dropped. This variant is diagnostic only; it must not mean DMA is still active.

Trait Implementations

impl Clone for PollRequestError

fn clone(&self) -> PollRequestError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for PollRequestError

impl Debug for PollRequestError

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

Formats the value using the given formatter.

impl Display for PollRequestError

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

Formats the value using the given formatter.

impl Eq for PollRequestError

impl Error for PollRequestError

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

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

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

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.

impl PartialEq for PollRequestError

fn eq(&self, other: &PollRequestError) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for PollRequestError