evdev-rs/examples/evtest_tokio.rs
Jeff Hiner cb2f5ef87a
Separate out sane blocking and async (nonblocking) implementations (#33)
* Default impl should block. Renaming it to avoid API confusion from previous users.

* Can't get rid of libc::read because we have MaybeUninit, but we can clean up the match

* Remove extra include

* Switch everything over to io::Error

* Add initial tokio impl+example

* Move evtest_tokio to normal example

* Add documentation and clarify

* Use a VecDeque (ring buffer) instead of repeatedly popping things off the front of a Vec

* Looks like we are not using thiserror anymore; removing

* Store read buf between calls

* Add nonblocking example with epoll

Co-authored-by: Jeff Hiner <jeff-hiner@users.noreply.github.com>
Co-authored-by: Noah <33094578+coolreader18@users.noreply.github.com>
2021-03-01 10:09:11 -07:00

29 lines
974 B
Rust

use tokio_1 as tokio;
use futures_util::TryStreamExt;
#[tokio::main]
async fn main() -> Result<(), Box<dyn std::error::Error>> {
let mut args = std::env::args_os();
let d = if args.len() > 1 {
evdev::Device::open(&args.nth(1).unwrap())?
} else {
let mut devices = evdev::enumerate().collect::<Vec<_>>();
for (i, d) in devices.iter().enumerate() {
println!("{}: {}", i, d.name().unwrap_or("Unnamed device"));
}
print!("Select the device [0-{}]: ", devices.len());
let _ = std::io::Write::flush(&mut std::io::stdout());
let mut chosen = String::new();
std::io::stdin().read_line(&mut chosen)?;
devices.swap_remove(chosen.trim().parse::<usize>()?)
};
println!("{}", d);
println!("Events:");
let mut events = d.into_event_stream_no_sync()?;
while let Some(ev) = events.try_next().await? {
println!("{:?}", ev);
}
println!("EOF!");
Ok(())
}