使用 Futures/async/await 简单实现 Linux AIO.

示例

使用 aiofut 计划对文件的写入操作

use futures::{executor::LocalPool, future::FutureExt, task::LocalSpawnExt};
use aiofut::AIOBuilder;
use std::os::unix::io::AsRawFd;
let mut aiomgr = AIOBuilder::default().build().unwrap();
let file = std::fs::OpenOptions::new()
    .read(true)
    .write(true)
    .create(true)
    .truncate(true)
    .open("test")
    .unwrap();
let fd = file.as_raw_fd();
// keep all returned futures in a vector
let ws = vec![(0, "hello"), (5, "world"), (2, "xxxx")]
    .into_iter()
    .map(|(off, s)| aiomgr.write(fd, off, s.as_bytes().into(), None))
    .collect::<Vec<_>>();
// here we use futures::executor::LocalPool to poll all futures
let mut pool = LocalPool::new();
let spawner = pool.spawner();
for w in ws.into_iter() {
    let h = spawner.spawn_local_with_handle(w).unwrap().map(|r| {
        println!("wrote {} bytes", r.0.unwrap());
    });
    spawner.spawn_local(h).unwrap();
}
pool.run();