Struct OptionalCounter 

pub struct OptionalCounter { /* private fields */ }

An optional Zircon Counter.

Implementations

impl OptionalCounter

pub fn set_encoded_present(out: &mut MaybeUninit<OptionalCounter>)

Encodes a Counter as present in an output.

pub fn set_encoded_absent(out: &mut MaybeUninit<OptionalCounter>)

Encodes a Counter as absent in an output.

pub fn is_some(&self) -> bool

Returns whether a Counter is present.

pub fn is_none(&self) -> bool

Returns whether a Counter is absent.

pub fn as_raw_handle(&self) -> Option<u32>

Returns the underlying zx_handle_t, if any.

Trait Implementations

impl Constrained for OptionalCounter

type Constraint = ()

Type of constraint information for this type.

fn validate( _: Slot<'_, OptionalCounter>, _: <OptionalCounter as Constrained>::Constraint, ) -> Result<(), ValidationError>

Validate a slot of this type against a constraint. Can be called when pointers/envelopes are just presence markers.

impl Debug for OptionalCounter

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

Formats the value using the given formatter.

impl<D> Decode<D> for OptionalCounter

where D: HandleDecoder + ?Sized,

fn decode( slot: Slot<'_, OptionalCounter>, decoder: &mut D, constraint: <OptionalCounter as Constrained>::Constraint, ) -> Result<(), DecodeError>

Decodes a value into a slot using a decoder.

impl<E> EncodeOption<OptionalCounter, E> for Counter

where E: HandleEncoder + ?Sized,

fn encode_option( this: Option<Counter>, encoder: &mut E, out: &mut MaybeUninit<OptionalCounter>, constraint: (), ) -> Result<(), EncodeError>

Encodes this optional value into an encoder and output.

impl FromWireOption<OptionalCounter> for Counter

fn from_wire_option(wire: OptionalCounter) -> Option<Counter>

Converts the given owned value to an option of this type.

impl IntoNatural for OptionalCounter

type Natural = Option<Counter>

A good default type for this wire type to convert into.

fn into_natural(self) -> Self::Natural

Converts this type into its natural equivalent.

impl Wire for OptionalCounter

type Narrowed<'de> = OptionalCounter

The narrowed wire type, restricted to the 'de lifetime.

fn zero_padding(out: &mut MaybeUninit<OptionalCounter>)

Writes zeroes to the padding for this type, if any.