Struct threader::reactor::observer::Observer

pub struct Observer<R: Evented> { /* fields omitted */ }

A type that "observes" changes in a resource's state from the reactor, waking from the IoWaker if a change is detected.

Methods

impl<R: Evented> Observer<R>

pub fn new(resource: R, interest: Ready, opts: PollOpt) -> Result<Self>

Creates a new instance of Observer

pub fn with_handle(
    resource: R,
    interest: Ready,
    opts: PollOpt,
    handle: Handle
) -> Result<Self>

Creates a new instance of Observer with the given reactor handle.

pub fn from_other(resource: R, other: &Self) -> Self

Creates an Observer from another using a different resource but the same IoWaker and Handle.

pub fn get_ref(&self) -> &R

Returns a reference to the underlying resource.

pub fn get_mut(&mut self) -> &mut R

Returns a mutable reference to the underlying resource.

pub fn io_waker(&self) -> Arc<IoWaker>

Clones the internal IoWaker and returns it.

pub fn handle(&self) -> Handle

Clones the internal Handle and returns it.

pub fn reregister(&self, interest: Ready, opts: PollOpt) -> Result<()>

Reregisters the underlying resource with the internal Handle.

pub fn deregister(&self) -> Result<()>

Deregisters a resource from the reactor that drives it.

pub fn poll_readable(&self, cx: &mut Context) -> Poll<Ready>

Polls for read readiness.

pub fn poll_writable(&self, cx: &mut Context) -> Poll<Ready>

Polls for write readiness.

pub async fn await_readable<'_>(&'_ self) -> Ready

A convenience method for wrapping poll_readable in a future.

pub async fn await_writable<'_>(&'_ self) -> Ready

A convenience method for wrapping poll_writable in a future.

Trait Implementations

impl<E: Evented> Drop for Observer<E>

fn drop(&mut self)

Executes the destructor for this type.

impl<R: Debug + Evented> Debug for Observer<R>

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

Formats the value using the given formatter.

impl<E: Evented + Read> Read for Observer<E>

fn read(&mut self, buf: &mut [u8]) -> Result<usize>

Pull some bytes from this source into the specified buffer, returning how many bytes were read.

fn read_vectored(&mut self, bufs: &mut [IoSliceMut]) -> Result<usize, Error>

Like read, except that it reads into a slice of buffers.

unsafe fn initializer(&self) -> Initializer

🔬 This is a nightly-only experimental API. (read_initializer)

Determines if this Reader can work with buffers of uninitialized memory.

fn read_to_end(&mut self, buf: &mut Vec<u8>) -> Result<usize, Error>

Read all bytes until EOF in this source, placing them into buf.

fn read_to_string(&mut self, buf: &mut String) -> Result<usize, Error>

Read all bytes until EOF in this source, appending them to buf.

fn read_exact(&mut self, buf: &mut [u8]) -> Result<(), Error>

Read the exact number of bytes required to fill buf.

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

Transforms this Read instance to an [Iterator] over its bytes.

fn chain<R>(self, next: R) -> Chain<Self, R> where
    R: Read, 

Creates an adaptor which will chain this stream with another.

fn take(self, limit: u64) -> Take<Self>

Creates an adaptor which will read at most limit bytes from it.

impl<E: Evented + Write> Write for Observer<E>

fn write(&mut self, buf: &[u8]) -> Result<usize>

Write a buffer into this writer, returning how many bytes were written.

fn flush(&mut self) -> Result<()>

Flush this output stream, ensuring that all intermediately buffered contents reach their destination.

fn write_vectored(&mut self, bufs: &[IoSlice]) -> Result<usize, Error>

Like write, except that it writes from a slice of buffers.

fn write_all(&mut self, buf: &[u8]) -> Result<(), Error>

Attempts to write an entire buffer into this writer.

fn write_fmt(&mut self, fmt: Arguments) -> Result<(), Error>

Writes a formatted string into this writer, returning any error encountered.

fn by_ref(&mut self) -> &mut Self

Creates a "by reference" adaptor for this instance of Write.