Struct tokio_eventfd::EventFd

pub struct EventFd(_);

Implementations

impl EventFd

pub fn new(init: u32, is_semaphore: bool) -> Result<Self>

Create new Eventfd. init is the initial value of the counter is_semaphore determines eventfd behaviour:

• if true and counter has non-zero value read returns 8 bytes containing the value 1, and the counter’s value is decremented by 1
• if false and counter has non-zero value read returns the value and the counter’s value is reset to 0.

pub fn try_clone(&self) -> Result<Self>

Trait Implementations

impl AsRawFd for EventFd

fn as_raw_fd(&self) -> RawFd

Extracts the raw file descriptor.

impl AsyncRead for EventFd

fn poll_read(
    self: Pin<&mut Self>,
    cx: &mut Context<'_>,
    buf: &mut ReadBuf<'_>
) -> Poll<Result<()>>

Attempts to read from the AsyncRead into buf.

impl AsyncWrite for EventFd

fn poll_write(
    self: Pin<&mut Self>,
    cx: &mut Context<'_>,
    buf: &[u8]
) -> Poll<Result<usize>>

Attempt to write bytes from buf into the object.

fn poll_flush(self: Pin<&mut Self>, _cx: &mut Context<'_>) -> Poll<Result<()>>

Attempts to flush the object, ensuring that any buffered data reach their destination.

fn poll_shutdown(
    self: Pin<&mut Self>,
    _cx: &mut Context<'_>
) -> Poll<Result<()>>

Initiates or attempts to shut down this writer, returning success when the I/O connection has completely shut down.

pub fn poll_write_vectored(
    self: Pin<&mut Self>,
    cx: &mut Context<'_>,
    bufs: &[IoSlice<'_>]
) -> Poll<Result<usize, Error>>

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

pub fn is_write_vectored(&self) -> bool

Determines if this writer has an efficient poll_write_vectored implementation.

impl FromRawFd for EventFd

unsafe fn from_raw_fd(fd: RawFd) -> Self

Constructs a new instance of Self from the given raw file descriptor.