Struct fidl_fuchsia_io::WritableProxy

pub struct WritableProxy { /* private fields */ }

Implementations

impl WritableProxy

pub fn new(channel: AsyncChannel) -> Self

Create a new Proxy for Writable

pub fn take_event_stream(&self) -> WritableEventStream

Get a Stream of events from the remote end of the Writable protocol

Panics

Panics if the event stream was already taken.

pub fn write(&self, data: &[u8]) -> QueryResponseFut<WritableWriteResult>

Writes data at the seek offset. The seek offset is moved forward by the number of bytes written. If the file is in append mode, the seek offset is first set to the end of the file, followed by the write, in one atomic step.

The file size may grow if the seek offset plus data.length is beyond the current end of file.

• request data the byte buffer to write to the file.

• response actual_count the number of bytes written.

Invariants

• The returned actual_count will never be greater than data.length.
• If the server is unable to write all the data due to e.g. not enough space, actual_count may be less than data.length. If no bytes could be written, an error is returned.
• If data.length is zero, the server should perform all the checks ensuring write access without mutating the file and return a successful write of zero bytes. The seek offset is still updated if in append mode.

This method requires the [Rights.WRITE_BYTES] right.

Trait Implementations

impl Clone for WritableProxy

fn clone(&self) -> WritableProxy

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for WritableProxy

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

Formats the value using the given formatter.

impl Proxy for WritableProxy

type Protocol = WritableMarker

The protocol which this Proxy controls.

fn from_channel(inner: AsyncChannel) -> Self

Create a proxy over the given channel.

fn into_channel(self) -> Result<AsyncChannel, Self>

Attempt to convert the proxy back into a channel.

fn as_channel(&self) -> &AsyncChannel

Get a reference to the proxy’s underlying channel.

fn is_closed(&self) -> bool

Returns true if the proxy has received the PEER_CLOSED signal.

fn on_closed<'a>(&'a self) -> OnSignals<'a>

Returns a future that completes when the proxy receives the PEER_CLOSED signal.

impl WritableProxyInterface for WritableProxy

type WriteResponseFut = QueryResponseFut<Result<u64, i32>>

fn write(&self, data: &[u8]) -> Self::WriteResponseFut