Struct AllowStdIo

pub struct AllowStdIo<T>(/* private fields */);

A simple wrapper type which allows types that only implement std::io::Read or std::io::Write to be used in contexts which expect an AsyncRead or AsyncWrite.

If these types issue an error with the kind io::ErrorKind::WouldBlock, it is expected that they will notify the current task on readiness. Synchronous std types should not issue errors of this kind and are safe to use in this context. However, using these types with AllowStdIo will cause the event loop to block, so they should be used with care.

Implementations

impl<T> AllowStdIo<T>

pub fn new(io: T) -> Self

Creates a new AllowStdIo from an existing IO object.

pub fn get_ref(&self) -> &T

Returns a reference to the contained IO object.

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

Returns a mutable reference to the contained IO object.

pub fn into_inner(self) -> T

Consumes self and returns the contained IO object.

Trait Implementations

impl<T> AsyncRead for AllowStdIo<T>

where T: Read,

unsafe fn prepare_uninitialized_buffer(&self, buf: &mut [u8]) -> bool

Prepares an uninitialized buffer to be safe to pass to read. Returns true if the supplied buffer was zeroed out.

fn poll_read(&mut self, buf: &mut [u8]) -> Poll<usize, Error>

Attempt to read from the AsyncRead into buf.

fn read_buf<B: BufMut>(&mut self, buf: &mut B) -> Poll<usize, Error>

where Self: Sized,

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

fn framed<T: Encoder + Decoder>(self, codec: T) -> Framed<Self, T>

where Self: AsyncWrite + Sized,

👎Deprecated since 0.1.7: Use tokio_codec::Decoder::framed instead

Provides a Stream and Sink interface for reading and writing to this I/O object, using Decode and Encode to read and write the raw data.

fn split(self) -> (ReadHalf<Self>, WriteHalf<Self>)

where Self: AsyncWrite + Sized,

Helper method for splitting this read/write object into two halves.

impl<T> AsyncWrite for AllowStdIo<T>

where T: Write,

fn shutdown(&mut self) -> Poll<(), Error>

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

fn poll_write(&mut self, buf: &[u8]) -> Poll<usize, Error>

Attempt to write bytes from buf into the object.

fn poll_flush(&mut self) -> Poll<(), Error>

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

fn write_buf<B: Buf>(&mut self, buf: &mut B) -> Poll<usize, Error>

where Self: Sized,

Write a Buf into this value, returning how many bytes were written.

impl<T: Clone> Clone for AllowStdIo<T>

fn clone(&self) -> AllowStdIo<T>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<T: Debug> Debug for AllowStdIo<T>

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

Formats the value using the given formatter.

impl<T: Hash> Hash for AllowStdIo<T>

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl<T: Ord> Ord for AllowStdIo<T>

fn cmp(&self, other: &AllowStdIo<T>) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl<T: PartialEq> PartialEq for AllowStdIo<T>

fn eq(&self, other: &AllowStdIo<T>) -> 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<T: PartialOrd> PartialOrd for AllowStdIo<T>

fn partial_cmp(&self, other: &AllowStdIo<T>) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl<T> Read for AllowStdIo<T>

where T: Read,

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

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

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

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

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

Reads the exact number of bytes required to fill buf.

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

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

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.

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.

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.

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

where Self: Sized,

Creates a “by reference” adaptor for this instance of Read.

fn bytes(self) -> Bytes<Self>

where Self: Sized,

Transforms this Read instance to an Iterator over its bytes.

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

where R: Read, Self: Sized,

Creates an adapter which will chain this stream with another.

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

where Self: Sized,

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

impl<T> Write for AllowStdIo<T>

where T: Write,

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

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

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

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

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

Attempts to write an entire buffer into this writer.

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

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

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

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

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.

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.

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

where Self: Sized,

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

impl<T: Copy> Copy for AllowStdIo<T>

impl<T: Eq> Eq for AllowStdIo<T>

impl<T> StructuralPartialEq for AllowStdIo<T>