Struct tokio_util::io::SyncIoBridge

source ·
pub struct SyncIoBridge<T> { /* private fields */ }
Available on crate features io-util and io only.
Expand description

Implementations§

source§

impl<T: AsyncWrite> SyncIoBridge<T>

source

pub fn is_write_vectored(&self) -> bool

Determines if the underlying tokio::io::AsyncWrite target supports efficient vectored writes.

See tokio::io::AsyncWrite::is_write_vectored.

source§

impl<T: AsyncWrite + Unpin> SyncIoBridge<T>

source

pub fn shutdown(&mut self) -> Result<()>

Shutdown this writer. This method provides a way to call the AsyncWriteExt::shutdown function of the inner tokio::io::AsyncWrite instance.

§Errors

This method returns the same errors as AsyncWriteExt::shutdown.

source§

impl<T: Unpin> SyncIoBridge<T>

source

pub fn new(src: T) -> Self

Use a tokio::io::AsyncRead synchronously as a std::io::Read or a tokio::io::AsyncWrite as a std::io::Write.

When this struct is created, it captures a handle to the current thread’s runtime with tokio::runtime::Handle::current. It is hence OK to move this struct into a separate thread outside the runtime, as created by e.g. tokio::task::spawn_blocking.

Stated even more strongly: to make use of this bridge, you must move it into a separate thread outside the runtime. The synchronous I/O will use the underlying handle to block on the backing asynchronous source, via tokio::runtime::Handle::block_on. As noted in the documentation for that function, an attempt to block_on from an asynchronous execution context will panic.

§Wrapping !Unpin types

Use e.g. SyncIoBridge::new(Box::pin(src)).

§Panics

This will panic if called outside the context of a Tokio runtime.

source

pub fn new_with_handle(src: T, rt: Handle) -> Self

Use a tokio::io::AsyncRead synchronously as a std::io::Read or a tokio::io::AsyncWrite as a std::io::Write.

This is the same as SyncIoBridge::new, but allows passing an arbitrary handle and hence may be initially invoked outside of an asynchronous context.

source

pub fn into_inner(self) -> T

Consume this bridge, returning the underlying stream.

Trait Implementations§

source§

impl<T: AsyncBufRead + Unpin> BufRead for SyncIoBridge<T>

source§

fn fill_buf(&mut self) -> Result<&[u8]>

Returns the contents of the internal buffer, filling it with more data from the inner reader if it is empty. Read more
source§

fn consume(&mut self, amt: usize)

Tells this buffer that amt bytes have been consumed from the buffer, so they should no longer be returned in calls to read. Read more
source§

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

Reads all bytes into buf until the delimiter byte or EOF is reached. Read more
source§

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

Reads all bytes until a newline (the 0xA byte) is reached, and append them to the provided String buffer. Read more
source§

fn has_data_left(&mut self) -> Result<bool, Error>

🔬This is a nightly-only experimental API. (buf_read_has_data_left)
Checks if the underlying Read has any data left to be read. Read more
source§

fn skip_until(&mut self, byte: u8) -> Result<usize, Error>

🔬This is a nightly-only experimental API. (bufread_skip_until)
Skips all bytes until the delimiter byte or EOF is reached. Read more
1.0.0 · source§

fn split(self, byte: u8) -> Split<Self>
where Self: Sized,

Returns an iterator over the contents of this reader split on the byte byte. Read more
1.0.0 · source§

fn lines(self) -> Lines<Self>
where Self: Sized,

Returns an iterator over the lines of this reader. Read more
source§

impl<T: Debug> Debug for SyncIoBridge<T>

source§

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

Formats the value using the given formatter. Read more
source§

impl<T: AsyncRead + Unpin> Read for SyncIoBridge<T>

source§

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. Read more
source§

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

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

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

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

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

Reads the exact number of bytes required to fill buf. Read more
1.36.0 · source§

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

Like read, except that it reads into a slice of buffers. Read more
source§

fn is_read_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)
Determines if this Reader has an efficient read_vectored implementation. Read more
source§

fn read_buf(&mut self, buf: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)
Pull some bytes from this source into the specified buffer. Read more
source§

fn read_buf_exact(&mut self, cursor: BorrowedCursor<'_>) -> Result<(), Error>

🔬This is a nightly-only experimental API. (read_buf)
Reads the exact number of bytes required to fill cursor. Read more
1.0.0 · source§

fn by_ref(&mut self) -> &mut Self
where Self: Sized,

Creates a “by reference” adaptor for this instance of Read. Read more
1.0.0 · source§

fn bytes(self) -> Bytes<Self>
where Self: Sized,

Transforms this Read instance to an Iterator over its bytes. Read more
1.0.0 · source§

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

Creates an adapter which will chain this stream with another. Read more
1.0.0 · source§

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

Creates an adapter which will read at most limit bytes from it. Read more
source§

impl<T: AsyncSeek + Unpin> Seek for SyncIoBridge<T>

source§

fn seek(&mut self, pos: SeekFrom) -> Result<u64>

Seek to an offset, in bytes, in a stream. Read more
1.55.0 · source§

fn rewind(&mut self) -> Result<(), Error>

Rewind to the beginning of a stream. Read more
source§

fn stream_len(&mut self) -> Result<u64, Error>

🔬This is a nightly-only experimental API. (seek_stream_len)
Returns the length of this stream (in bytes). Read more
1.51.0 · source§

fn stream_position(&mut self) -> Result<u64, Error>

Returns the current seek position from the start of the stream. Read more
1.80.0 · source§

fn seek_relative(&mut self, offset: i64) -> Result<(), Error>

Seeks relative to the current position. Read more
source§

impl<T: AsyncWrite + Unpin> Write for SyncIoBridge<T>

source§

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

Writes a buffer into this writer, returning how many bytes were written. Read more
source§

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

Flushes this output stream, ensuring that all intermediately buffered contents reach their destination. Read more
source§

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

Attempts to write an entire buffer into this writer. Read more
source§

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

Like write, except that it writes from a slice of buffers. Read more
source§

fn is_write_vectored(&self) -> bool

🔬This is a nightly-only experimental API. (can_vector)
Determines if this Writer has an efficient write_vectored implementation. Read more
source§

fn write_all_vectored(&mut self, bufs: &mut [IoSlice<'_>]) -> Result<(), Error>

🔬This is a nightly-only experimental API. (write_all_vectored)
Attempts to write multiple buffers into this writer. Read more
1.0.0 · source§

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

Writes a formatted string into this writer, returning any error encountered. Read more
1.0.0 · source§

fn by_ref(&mut self) -> &mut Self
where Self: Sized,

Creates a “by reference” adapter for this instance of Write. Read more

Auto Trait Implementations§

§

impl<T> Freeze for SyncIoBridge<T>
where T: Freeze,

§

impl<T> !RefUnwindSafe for SyncIoBridge<T>

§

impl<T> Send for SyncIoBridge<T>
where T: Send,

§

impl<T> Sync for SyncIoBridge<T>
where T: Sync,

§

impl<T> Unpin for SyncIoBridge<T>
where T: Unpin,

§

impl<T> !UnwindSafe for SyncIoBridge<T>

Blanket Implementations§

source§

impl<T> Any for T
where T: 'static + ?Sized,

source§

fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
source§

impl<T> Borrow<T> for T
where T: ?Sized,

source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
source§

impl<T> BorrowMut<T> for T
where T: ?Sized,

source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
source§

impl<T> From<T> for T

source§

fn from(t: T) -> T

Returns the argument unchanged.

source§

impl<T> Instrument for T

source§

fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
source§

fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
source§

impl<T, U> Into<U> for T
where U: From<T>,

source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

source§

impl<T, U> TryFrom<U> for T
where U: Into<T>,

source§

type Error = Infallible

The type returned in the event of a conversion error.
source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
source§

impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

source§

type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
source§

impl<T> WithSubscriber for T

source§

fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
source§

fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more