7 releases
0.2.5 | Oct 29, 2023 |
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0.2.4 | Oct 9, 2023 |
0.2.2 | Sep 28, 2023 |
0.2.0 | Feb 8, 2023 |
0.1.0 | Jun 10, 2019 |
#1448 in Asynchronous
472,397 downloads per month
Used in 1,507 crates
(2 directly)
30KB
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async-signal
Asynchronous signal handling.
This crate provides the Signals
type, which can be used to listen for POSIX signals asynchronously. It can be seen as an asynchronous version of signal_hook::iterator::Signals
.
Implementation
On unix
, this crate uses the signal_hook_registry
crate to register a listener for each signal. That listener will then send a message through a Unix socket to the Signals
type, which will receive it and notify the user. Asynchronous notification is done through the async-io
crate.
Note that the internal pipe has a limited capacity. Once it has reached capacity, additional signals will be dropped.
On Windows, a different implementation that only supports SIGINT
is used. This implementation uses a channel to notify the user.
Examples
use async_signal::{Signal, Signals};
use futures_lite::prelude::*;
use signal_hook::low_level;
// Register the signals we want to receive.
let signals = Signals::new(&[
Signal::Term,
Signal::Quit,
Signal::Int,
])?;
// Wait for a signal to be received.
while let Some(signal) = signals.next().await {
// Print the signal.
eprintln!("Received signal {:?}", signal);
// After printing it, do whatever the signal was supposed to do in the first place.
low_level::emulate_default_handler(signal.unwrap() as i32).unwrap();
}
License
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.
Dependencies
~3–15MB
~169K SLoC