Realm IO

Realm's high performance IO collections.

Example

use tokio::net::TcpStream;
use realm_io::{bidi_copy, bidi_zero_copy, bidi_copy_buf};
use realm_io::{Pipe, CopyBuffer};

let mut left = TcpStream::connect("abc").await.unwrap();
let mut right = TcpStream::connect("def").await.unwrap();

// direct copy     
bidi_copy(&mut left, &mut right).await;

// zero copy
bidi_zero_copy(&mut left, &mut right).await;

// use custom buffer(vector)
let buf1 = CopyBuffer::new(vec![0; 0x2000]);
let buf2 = CopyBuffer::new(vec![0; 0x2000]);
bidi_copy_buf(&mut left, &mut right, buf1, buf2).await;

// use custom buffer(pipe)
let buf1 = CopyBuffer::new(Pipe::new().unwrap());
let buf2 = CopyBuffer::new(Pipe::new().unwrap());
bidi_copy_buf(&mut left, &mut right, buf1, buf2).await;

About Brutal Shutdown

By default, bidi_copy_buf and other IO functions perform a graceful shutdown.

With the feature brutal-shutdown enabled, these IO functions will decide to perform a brutal shutdown once a FIN packet reaches, which will forcefully close two connections on both sides without waiting for a reply packet.

This is helpful when handling connections from a poorly implemented client or server, which may never shutdown its write side nor close the underlying socket.