Enum DataTransfer 

pub enum DataTransfer {
    VmoTransfer(VmoTransfer),
    InlineData(Vec<u8>),
    // some variants omitted
}

Data to be transferred. There are two supported ways data may be conveyed, corresponding to the two members of the DataTransfer union:

1. vmo_transfer: A region within a VMO previously known to the driver. This VMO must have been established via PacketStreamControl.RegisterVmos (if client-allocated) or PacketStreamControl.AllocateVmos (if driver-allocated). Future requests refer to this buffer by the unique vmo_id. Because VMOs are reused across requests, the one-time cost of pinning/mapping is amortized.

2. data: The payload is provided directly within the message. This mode is intended for small transfers or control information, not high-throughput streaming.

Variants

VmoTransfer(VmoTransfer)

Data is stored in a region of a registered VMO. Requires PacketStreamProperties.supported_buffer_types to include CLIENT_OWNED or DRIVER_OWNED.

InlineData(Vec<u8>)

Embedded data buffer. Requires PacketStreamProperties.supported_buffer_types to include INLINE.

Implementations

impl DataTransfer

pub fn ordinal(&self) -> u64

pub fn unknown_variant_for_testing() -> Self

pub fn is_unknown(&self) -> bool

Trait Implementations

impl Debug for DataTransfer

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

Formats the value using the given formatter.

impl Decode<DataTransfer, DefaultFuchsiaResourceDialect> for DataTransfer

fn new_empty() -> Self

Creates a valid instance of Self. The specific value does not matter, since it will be overwritten by decode.

unsafe fn decode( &mut self, decoder: &mut Decoder<'_, DefaultFuchsiaResourceDialect>, offset: usize, depth: Depth, ) -> Result<()>

Decodes an object of type T from the decoder’s buffers into self.

impl Encode<DataTransfer, DefaultFuchsiaResourceDialect> for &mut DataTransfer

unsafe fn encode( self, encoder: &mut Encoder<'_, DefaultFuchsiaResourceDialect>, offset: usize, _depth: Depth, ) -> Result<()>

Encodes the object into the encoder’s buffers. Any handles stored in the object are swapped for Handle::INVALID.

impl PartialEq for DataTransfer

fn eq(&self, other: &Self) -> 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 ResourceTypeMarker for DataTransfer

type Borrowed<'a> = &'a mut DataTransfer

The Rust type to use for encoding. This is a particular Encode<Self> type cheaply obtainable from &mut Self::Owned. There are three cases:

fn take_or_borrow<'a>( value: &'a mut <Self as TypeMarker>::Owned, ) -> Self::Borrowed<'a>

Cheaply converts from &mut Self::Owned to Self::Borrowed. For HandleBased types this is “take” (it returns an owned handle and replaces value with Handle::invalid), and for all other types it is “borrow” (just converts from one reference to another).

impl TypeMarker for DataTransfer

type Owned = DataTransfer

The owned Rust type which this FIDL type decodes into.

fn inline_align(_context: Context) -> usize

Returns the minimum required alignment of the inline portion of the encoded object. It must be a (nonzero) power of two.

fn inline_size(_context: Context) -> usize

Returns the size of the inline portion of the encoded object, including padding for alignment. Must be a multiple of inline_align.

fn encode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and encoding requires no validation. When true, we can optimize encoding arrays and vectors of Self::Owned to a single memcpy.

fn decode_is_copy() -> bool

Returns true if the memory layout of Self::Owned matches the FIDL wire format and decoding requires no validation. When true, we can optimize decoding arrays and vectors of Self::Owned to a single memcpy.

impl Standalone<DefaultFuchsiaResourceDialect> for DataTransfer