Crate tokio_file

Asynchronous File I/O module for Tokio

This module provides methods for asynchronous file I/O. On BSD-based operating systems, it uses mio-aio. On Linux, it could use libaio, but that isn’t implemented yet.

Examples

use std::fs;
use std::io::Read;
use tempfile::TempDir;
use tokio::runtime;

let contents = b"abcdef";
let mut rbuf = Vec::new();

let dir = TempDir::new().unwrap();
let path = dir.path().join("foo");
let file = fs::OpenOptions::new()
    .create(true)
    .write(true)
    .open(&path)
    .map(tokio_file::File::new)
    .unwrap();
let rt = runtime::Builder::new_current_thread()
    .enable_io()
    .build()
    .unwrap();
let r = rt.block_on(async {
    file.write_at(contents, 0).unwrap().await
}).unwrap();
assert_eq!(r.value.unwrap() as usize, contents.len());
drop(file);

let mut file = fs::File::open(&path).unwrap();
assert_eq!(file.read_to_end(&mut rbuf).unwrap(), contents.len());
assert_eq!(&contents[..], &rbuf[..]);

Structs

AioFut

A Future representing an AIO operation.

AioResult

Holds the result of an individual aio operation

File

Basically a Tokio file handle. This is the starting point for tokio-file.

ReadvAt

The return value of File::readv_at

WritevAt

The return value of File::writev_at