Enum BeginFailure 

#[non_exhaustive]
pub enum BeginFailure {
    SubmissionRingFull,
    CompletionRingFull,
    Abandoned,
    TokenCapture,
    BufferAllocation,
}

Why an enumeration was not admitted.

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.

SubmissionRingFull

The submission ring had no room for ordinary traffic.

Reserved cancellation and abandonment messages are unaffected: this is backpressure on starting work, applied where a caller can respond to it.

CompletionRingFull

The completion ring could not reserve the terminal slot this enumeration would owe.

Reservations never take the ring’s last slot, so this is reached when the session is already carrying as many enumerations as its completion ring can account for.

Abandoned

The receiver is gone, so the session no longer starts anything.

TokenCapture

The caller’s security context could not be captured.

BufferAllocation

The enumeration’s fixed native buffer could not be allocated.

Reported rather than aborting the process, which is what the ordinary growable-vector path would do.

Trait Implementations

impl Clone for BeginFailure

fn clone(&self) -> BeginFailure

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for BeginFailure

impl Debug for BeginFailure

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

Formats the value using the given formatter.

impl Eq for BeginFailure

impl Hash for BeginFailure

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for BeginFailure

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for BeginFailure