Union OptionalDriverChannel 

pub union OptionalDriverChannel {
    /* private fields */
}

The FIDL wire type for optional DriverChannels.

This type follows the FIDL wire format for handles, and is separate from the Zircon handle optional wire type. This ensures that we never confuse the two types when using FIDL.

Implementations

impl OptionalDriverChannel

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

Encodes a driver handle as present in a slot.

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

Encodes a driver handle as absent in an output.

pub fn is_some(&self) -> bool

Returns whether a handle is present.

pub fn is_none(&self) -> bool

Returns whether a handle is absent.

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

Returns the underlying fdf_handle_t, if any.

Trait Implementations

impl Constrained for OptionalDriverChannel

type Constraint = ()

Type of constraint information for this type.

fn validate( _: Slot<'_, Self>, _: Self::Constraint, ) -> Result<(), ValidationError>

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

impl<D: HandleDecoder + ?Sized> Decode<D> for OptionalDriverChannel

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

Decodes a value into a slot using a decoder.

impl Drop for OptionalDriverChannel

fn drop(&mut self)

Executes the destructor for this type.

impl<E: HandleEncoder + ?Sized> EncodeOption<OptionalDriverChannel, E> for DriverChannel

fn encode_option( this: Option<Self>, encoder: &mut E, out: &mut MaybeUninit<OptionalDriverChannel>, _: (), ) -> Result<(), EncodeError>

Encodes this optional value into an encoder and output.

impl FromWireOption<OptionalDriverChannel> for DriverChannel

fn from_wire_option(wire: OptionalDriverChannel) -> Option<Self>

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

impl IntoNatural for OptionalDriverChannel

type Natural = Option<DriverChannel>

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 OptionalDriverChannel

type Narrowed<'de> = OptionalDriverChannel

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

fn zero_padding(_: &mut MaybeUninit<Self>)

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