Struct MessageHeader 

#[repr(C)]
pub struct MessageHeader {
    pub txid: Uint32,
    pub flags_0: MessageHeaderFlags0,
    pub flags_1: MessageHeaderFlags1,
    pub flags_2: MessageHeaderFlags2,
    pub magic_number: u8,
    pub ordinal: Uint64,
}

A FIDL protocol message header

Fields

txid: Uint32

The transaction ID of the message header

flags_0: MessageHeaderFlags0

Flags byte 0

flags_1: MessageHeaderFlags1

Flags byte 1

flags_2: MessageHeaderFlags2

Flags byte 2

magic_number: u8

Magic number

ordinal: Uint64

The ordinal of the message following this header

Implementations

impl MessageHeader

pub fn new(txid: u32, ordinal: u64, flexibility: Flexibility) -> MessageHeader

Returns a new message header with the given transaction ID, ordinal, and flexibility.

pub fn flexibility(&self) -> Flexibility

Returns the flexibility of the message header.

Trait Implementations

impl Clone for MessageHeader

fn clone(&self) -> MessageHeader

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Constrained for MessageHeader

type Constraint = ()

Type of constraint information for this type.

fn validate( _: Slot<'_, MessageHeader>, _: <MessageHeader 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 MessageHeader

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

Formats the value using the given formatter.

impl<D> Decode<D> for MessageHeader

where D: ?Sized,

fn decode( _: Slot<'_, MessageHeader>, _: &mut D, _: (), ) -> Result<(), DecodeError>

Decodes a value into a slot using a decoder.

impl<E> Encode<MessageHeader, E> for &MessageHeader

where E: ?Sized,

fn encode( self, encoder: &mut E, out: &mut MaybeUninit<MessageHeader>, constraint: (), ) -> Result<(), EncodeError>

Encodes this value into an encoder and output.

const COPY_OPTIMIZATION: CopyOptimization<Self, W> = _

Whether the conversion from Self to W is equivalent to copying the raw bytes of Self.

impl<E> Encode<MessageHeader, E> for MessageHeader

where E: ?Sized,

fn encode( self, _: &mut E, out: &mut MaybeUninit<MessageHeader>, _: (), ) -> Result<(), EncodeError>

Encodes this value into an encoder and output.

const COPY_OPTIMIZATION: CopyOptimization<Self, W> = _

Whether the conversion from Self to W is equivalent to copying the raw bytes of Self.

impl IntoBytes for MessageHeader

where Uint32: IntoBytes, MessageHeaderFlags0: IntoBytes, MessageHeaderFlags1: IntoBytes, MessageHeaderFlags2: IntoBytes, u8: IntoBytes, Uint64: IntoBytes, (): PaddingFree<MessageHeader, fidl_next_protocol::::wire::message_header::_#6::_::{impl#0}::{constant#0}>,

fn as_bytes(&self) -> &[u8]

where Self: Immutable,

Gets the bytes of this value.

fn as_mut_bytes(&mut self) -> &mut [u8]

where Self: FromBytes,

Gets the bytes of this value mutably.

fn write_to(&self, dst: &mut [u8]) -> Result<(), SizeError<&Self, &mut [u8]>>

where Self: Immutable,

Writes a copy of self to dst.

fn write_to_prefix( &self, dst: &mut [u8], ) -> Result<(), SizeError<&Self, &mut [u8]>>

where Self: Immutable,

Writes a copy of self to the prefix of dst.

fn write_to_suffix( &self, dst: &mut [u8], ) -> Result<(), SizeError<&Self, &mut [u8]>>

where Self: Immutable,

Writes a copy of self to the suffix of dst.

impl Wire for MessageHeader

type Narrowed<'de> = MessageHeader

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

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

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

impl Copy for MessageHeader