pub struct DuplexStream { /* private fields */ }
Expand description

A bidirectional pipe to read and write bytes in memory.

A pair of DuplexStreams are created together, and they act as a “channel” that can be used as in-memory IO types. Writing to one of the pairs will allow that data to be read from the other, and vice versa.

Closing a DuplexStream

If one end of the DuplexStream channel is dropped, any pending reads on the other side will continue to read data until the buffer is drained, then they will signal EOF by returning 0 bytes. Any writes to the other side, including pending ones (that are waiting for free space in the buffer) will return Err(BrokenPipe) immediately.

Example

let (mut client, mut server) = tokio::io::duplex(64);

client.write_all(b"ping").await?;

let mut buf = [0u8; 4];
server.read_exact(&mut buf).await?;
assert_eq!(&buf, b"ping");

server.write_all(b"pong").await?;

client.read_exact(&mut buf).await?;
assert_eq!(&buf, b"pong");

Trait Implementations

Attempts to read from the AsyncRead into buf. Read more

Attempt to write bytes from buf into the object. Read more

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

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

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

Determines if this writer has an efficient poll_write_vectored implementation. Read more

Formats the value using the given formatter. Read more

Executes the destructor for this type. Read more

Auto Trait Implementations

Blanket Implementations

Gets the TypeId of self. Read more

Immutably borrows from an owned value. Read more

Mutably borrows from an owned value. Read more

Returns the argument unchanged.

Calls U::from(self).

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

The type returned in the event of a conversion error.

Performs the conversion.

The type returned in the event of a conversion error.

Performs the conversion.