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{"files":{"Cargo.toml":"188f8e22dfa9a88f5e59b163bbeae30b950d8af1a2873116d1542a1d3fc7890b","LICENSE-APACHE":"a60eea817514531668d7e00765731449fe14d059d3249e0bc93b36de45f759f2","LICENSE-MIT":"503558bfefe66ca15e4e3f7955b3cb0ec87fd52f29bf24b336af7bd00e946d5c","README.md":"e2ac8dfcddf8dec4565f2cd2ee4e4b0aeeeace01fefa857645795083853e2d3f","src/lib.rs":"5ecc2d8a2c3048bd69c2c49b24202f02ada92b13a931a84039823f9b02478aa2","tests/mio_0_6.rs":"82b9a6b48836584abd2a9bd4f8474e357495c952b8fc84c681fa22494341a9dd","tests/mio_0_7.rs":"f5df7c8f3d0d9dee21b51d69a016adc677a8725e64b8de07146bc64270d09b92","tests/mio_0_8.rs":"ae978cda62548259e4a311554d07e2c745c5e9526cc7719bb3a3dc69fcdd1de2"},"package":"29ad2e15f37ec9a6cc544097b78a1ec90001e9f71b81338ca39f430adaca99af"}

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# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies.
#
# If you are reading this file be aware that the original Cargo.toml
# will likely look very different (and much more reasonable).
# See Cargo.toml.orig for the original contents.
[package]
edition = "2018"
name = "signal-hook-mio"
version = "0.2.3"
authors = [
"Michal 'vorner' Vaner <vorner@vorner.cz>",
"Thomas Himmelstoss <thimm@posteo.de>",
]
description = "MIO support for signal-hook"
documentation = "https://docs.rs/signal-hook-mio"
readme = "README.md"
keywords = [
"signal",
"unix",
"mio",
]
license = "Apache-2.0/MIT"
repository = "https://github.com/vorner/signal-hook"
[package.metadata.docs.rs]
all-features = true
rustdoc-args = [
"--cfg",
"docsrs",
]
[dependencies.libc]
version = "~0.2"
[dependencies.mio-0_6]
version = "~0.6"
optional = true
package = "mio"
[dependencies.mio-0_7]
version = "~0.7"
features = [
"os-util",
"uds",
]
optional = true
package = "mio"
[dependencies.mio-0_8]
version = "~0.8"
features = [
"net",
"os-ext",
]
optional = true
package = "mio"
[dependencies.mio-uds]
version = "~0.6"
optional = true
[dependencies.signal-hook]
version = "~0.3"
[dev-dependencies.mio-0_7]
version = "~0.7"
features = [
"os-util",
"os-poll",
"uds",
]
package = "mio"
[dev-dependencies.serial_test]
version = "~0.5"
[features]
support-v0_6 = [
"mio-0_6",
"mio-uds",
]
support-v0_7 = ["mio-0_7"]
support-v0_8 = ["mio-0_8"]
[badges.maintenance]
status = "actively-developed"
[badges.travis-ci]
repository = "vorner/signal-hook"

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Copyright (c) 2017 tokio-jsonrpc developers
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# signal-hook-mio
[![Travis Build Status](https://api.travis-ci.org/vorner/signal-hook.svg?branch=master)](https://travis-ci.org/vorner/signal-hook)
This is a mio adapter crate for the
[signal-hook](https://crates.io/crates/signal-hook) crate. See the
[documentation](https://docs.rs/signal-hook-mio) for further details.
## License
Licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0)
* MIT license ([LICENSE-MIT](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.

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#![doc(test(attr(deny(warnings))))]
#![warn(missing_docs)]
#![cfg_attr(docsrs, feature(doc_cfg))]
//! A crate offering integration with the MIO runtime.
//!
//! There are different sub modules for supporting different MIO
//! versions. The support for a version must be activated by a
//! feature flag:
//!
//! * `support-v0_6` for sub module [`v0_6`]
//! * `support-v0_7` for sub module [`v0_7`]
//! * `support-v0_8` for sub module [`v0_8`]
//!
//! See the specific sub modules for usage examples.
#[cfg(any(
feature = "support-v0_6",
feature = "support-v0_7",
feature = "support-v0_8"
))]
macro_rules! implement_signals_with_pipe {
($pipe:path) => {
use std::borrow::Borrow;
use std::io::Error;
use signal_hook::iterator::backend::{self, SignalDelivery};
use signal_hook::iterator::exfiltrator::{Exfiltrator, SignalOnly};
use $pipe as Pipe;
use libc::c_int;
/// A struct which mimics [`signal_hook::iterator::SignalsInfo`]
/// but also allows usage together with MIO runtime.
pub struct SignalsInfo<E: Exfiltrator = SignalOnly>(SignalDelivery<Pipe, E>);
pub use backend::Pending;
impl<E: Exfiltrator> SignalsInfo<E> {
/// Create a `Signals` instance.
///
/// This registers all the signals listed. The same restrictions (panics, errors) apply
/// as with [`Handle::add_signal`][backend::Handle::add_signal].
pub fn new<I, S>(signals: I) -> Result<Self, Error>
where
I: IntoIterator<Item = S>,
S: Borrow<c_int>,
E: Default,
{
Self::with_exfiltrator(signals, E::default())
}
/// A constructor with specifying an exfiltrator to pass information out of the signal
/// handlers.
pub fn with_exfiltrator<I, S>(signals: I, exfiltrator: E) -> Result<Self, Error>
where
I: IntoIterator<Item = S>,
S: Borrow<c_int>,
{
let (read, write) = Pipe::pair()?;
let delivery = SignalDelivery::with_pipe(read, write, exfiltrator, signals)?;
Ok(Self(delivery))
}
/// Registers another signal to the set watched by this [`Signals`] instance.
///
/// The same restrictions (panics, errors) apply as with
/// [`Handle::add_signal`][backend::Handle::add_signal].
pub fn add_signal(&self, signal: c_int) -> Result<(), Error> {
self.0.handle().add_signal(signal)
}
/// Returns an iterator of already received signals.
///
/// This returns an iterator over all the signal numbers of the signals received since last
/// time they were read (out of the set registered by this `Signals` instance). Note that they
/// are returned in arbitrary order and a signal number is returned only once even if it was
/// received multiple times.
///
/// This method returns immediately (does not block) and may produce an empty iterator if there
/// are no signals ready. So you should register an instance of this struct at an instance of
/// [`mio::Poll`] to query for readability of the underlying self pipe.
pub fn pending(&mut self) -> Pending<E> {
self.0.pending()
}
}
/// A simplified signal iterator.
///
/// This is the [`SignalsInfo`], but returning only the signal numbers. This is likely the
/// one you want to use.
pub type Signals = SignalsInfo<SignalOnly>;
};
}
/// A module for integrating signal handling with the MIO 0.8 runtime.
///
/// This provides the [`Signals`][v0_8::Signals] struct as an abstraction
/// which can be used with [`mio::Poll`][mio_0_8::Poll].
///
/// # Examples
///
/// ```rust
/// # use mio_0_8 as mio;
/// use std::io::{Error, ErrorKind};
///
/// use signal_hook::consts::signal::*;
/// use signal_hook_mio::v0_8::Signals;
///
/// use mio::{Events, Poll, Interest, Token};
///
/// fn main() -> Result<(), Error> {
/// let mut poll = Poll::new()?;
///
/// let mut signals = Signals::new(&[
/// SIGTERM,
/// # SIGUSR1,
/// ])?;
///
/// let signal_token = Token(0);
///
/// poll.registry().register(&mut signals, signal_token, Interest::READABLE)?;
/// # signal_hook::low_level::raise(SIGUSR1).unwrap(); // Just for terminating the example
///
/// let mut events = Events::with_capacity(10);
/// 'outer: loop {
/// poll.poll(&mut events, None)
/// .or_else(|e| if e.kind() == ErrorKind::Interrupted {
/// // We get interrupt when a signal happens inside poll. That's non-fatal, just
/// // retry.
/// events.clear();
/// Ok(())
/// } else {
/// Err(e)
/// })?;
/// for event in events.iter() {
/// match event.token() {
/// Token(0) => {
/// for signal in signals.pending() {
/// match signal {
/// SIGTERM => break 'outer,
/// # SIGUSR1 => return Ok(()),
/// _ => unreachable!(),
/// }
/// }
/// },
/// _ => unreachable!("Register other sources and match for their tokens here"),
/// }
/// }
/// }
///
/// Ok(())
/// }
/// ```
#[cfg(feature = "support-v0_8")]
pub mod v0_8 {
use mio::event::Source;
use mio::{Interest, Registry, Token};
use mio_0_8 as mio;
implement_signals_with_pipe!(mio::net::UnixStream);
impl Source for Signals {
fn register(
&mut self,
registry: &Registry,
token: Token,
interest: Interest,
) -> Result<(), Error> {
self.0.get_read_mut().register(registry, token, interest)
}
fn reregister(
&mut self,
registry: &Registry,
token: Token,
interest: Interest,
) -> Result<(), Error> {
self.0.get_read_mut().reregister(registry, token, interest)
}
fn deregister(&mut self, registry: &Registry) -> Result<(), Error> {
self.0.get_read_mut().deregister(registry)
}
}
}
/// A module for integrating signal handling with the MIO 0.7 runtime.
///
/// This provides the [`Signals`][v0_7::Signals] struct as an abstraction
/// which can be used with [`mio::Poll`][mio_0_7::Poll].
///
/// # Examples
///
/// ```rust
/// # use mio_0_7 as mio;
/// use std::io::{Error, ErrorKind};
///
/// use signal_hook::consts::signal::*;
/// use signal_hook_mio::v0_7::Signals;
///
/// use mio::{Events, Poll, Interest, Token};
///
/// fn main() -> Result<(), Error> {
/// let mut poll = Poll::new()?;
///
/// let mut signals = Signals::new(&[
/// SIGTERM,
/// # SIGUSR1,
/// ])?;
///
/// let signal_token = Token(0);
///
/// poll.registry().register(&mut signals, signal_token, Interest::READABLE)?;
/// # signal_hook::low_level::raise(SIGUSR1).unwrap(); // Just for terminating the example
///
/// let mut events = Events::with_capacity(10);
/// 'outer: loop {
/// poll.poll(&mut events, None)
/// .or_else(|e| if e.kind() == ErrorKind::Interrupted {
/// // We get interrupt when a signal happens inside poll. That's non-fatal, just
/// // retry.
/// events.clear();
/// Ok(())
/// } else {
/// Err(e)
/// })?;
/// for event in events.iter() {
/// match event.token() {
/// Token(0) => {
/// for signal in signals.pending() {
/// match signal {
/// SIGTERM => break 'outer,
/// # SIGUSR1 => return Ok(()),
/// _ => unreachable!(),
/// }
/// }
/// },
/// _ => unreachable!("Register other sources and match for their tokens here"),
/// }
/// }
/// }
///
/// Ok(())
/// }
/// ```
#[cfg(feature = "support-v0_7")]
pub mod v0_7 {
use mio::event::Source;
use mio::{Interest, Registry, Token};
use mio_0_7 as mio;
implement_signals_with_pipe!(mio::net::UnixStream);
impl Source for Signals {
fn register(
&mut self,
registry: &Registry,
token: Token,
interest: Interest,
) -> Result<(), Error> {
self.0.get_read_mut().register(registry, token, interest)
}
fn reregister(
&mut self,
registry: &Registry,
token: Token,
interest: Interest,
) -> Result<(), Error> {
self.0.get_read_mut().reregister(registry, token, interest)
}
fn deregister(&mut self, registry: &Registry) -> Result<(), Error> {
self.0.get_read_mut().deregister(registry)
}
}
}
/// A module for integrating signal handling with the MIO 0.6 runtime.
///
/// This provides the [`Signals`][v0_6::Signals] struct as an abstraction
/// which can be used with [`mio::Poll`][mio_0_6::Poll].
///
/// # Examples
///
/// ```rust
/// # use mio_0_6 as mio;
/// use std::io::{Error, ErrorKind};
///
/// use signal_hook::consts::signal::*;
/// use signal_hook_mio::v0_6::Signals;
///
/// use mio::{Events, Poll, PollOpt, Ready, Token};
///
/// fn main() -> Result<(), Error> {
/// let poll = Poll::new()?;
///
/// let mut signals = Signals::new(&[
/// SIGTERM,
/// # SIGUSR1,
/// ])?;
///
/// let signal_token = Token(0);
///
/// poll.register(&mut signals, signal_token, Ready::readable(), PollOpt::level())?;
/// # signal_hook::low_level::raise(SIGUSR1).unwrap(); // Just for terminating the example
///
/// let mut events = Events::with_capacity(10);
/// 'outer: loop {
/// poll.poll(&mut events, None)
/// .or_else(|e| if e.kind() == ErrorKind::Interrupted {
/// // We get interrupt when a signal happens inside poll. That's non-fatal, just
/// // retry.
/// events.clear();
/// Ok(0)
/// } else {
/// Err(e)
/// })?;
/// for event in events.iter() {
/// match event.token() {
/// Token(0) => {
/// for signal in signals.pending() {
/// match signal {
/// SIGTERM => break 'outer,
/// # SIGUSR1 => return Ok(()),
/// _ => unreachable!(),
/// }
/// }
/// },
/// _ => unreachable!("Register other sources and match for their tokens here"),
/// }
/// }
/// }
///
/// Ok(())
/// }
/// ```
#[cfg(feature = "support-v0_6")]
pub mod v0_6 {
use mio::event::Evented;
use mio::{Poll, PollOpt, Ready, Token};
use mio_0_6 as mio;
implement_signals_with_pipe!(mio_uds::UnixStream);
impl Evented for Signals {
fn register(
&self,
poll: &Poll,
token: Token,
interest: Ready,
opts: PollOpt,
) -> Result<(), Error> {
self.0.get_read().register(poll, token, interest, opts)
}
fn reregister(
&self,
poll: &Poll,
token: Token,
interest: Ready,
opts: PollOpt,
) -> Result<(), Error> {
self.0.get_read().reregister(poll, token, interest, opts)
}
fn deregister(&self, poll: &Poll) -> Result<(), Error> {
self.0.get_read().deregister(poll)
}
}
}

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#![cfg(feature = "support-v0_6")]
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::Arc;
use std::thread;
use std::time::Duration;
use mio_0_6::{Events, Poll, PollOpt, Ready, Token};
use signal_hook::consts::{SIGUSR1, SIGUSR2};
use signal_hook::low_level::raise;
use signal_hook_mio::v0_6::Signals;
use serial_test::serial;
use libc::c_int;
#[test]
#[serial]
fn mio_wakeup() {
let mut signals = Signals::new(&[SIGUSR1]).unwrap();
let token = Token(0);
let poll = Poll::new().unwrap();
poll.register(&signals, token, Ready::readable(), PollOpt::level())
.unwrap();
let mut events = Events::with_capacity(10);
// The self pipe shouldn't be readable yet
poll.poll(&mut events, Some(Duration::from_secs(0)))
.unwrap();
assert!(events.is_empty());
raise(SIGUSR1).unwrap();
poll.poll(&mut events, Some(Duration::from_secs(10)))
.unwrap();
let event = events.iter().next().unwrap();
assert!(event.readiness().is_readable());
assert_eq!(token, event.token());
let sig = signals.pending().next().unwrap();
assert_eq!(SIGUSR1, sig);
// The self pipe shouldn't be readable after consuming signals
poll.poll(&mut events, Some(Duration::from_secs(0)))
.unwrap();
assert!(events.is_empty());
}
#[test]
#[serial]
fn mio_multiple_signals() {
let mut signals = Signals::new(&[SIGUSR1, SIGUSR2]).unwrap();
let poll = Poll::new().unwrap();
let token = Token(0);
poll.register(&signals, token, Ready::readable(), PollOpt::level())
.unwrap();
let mut events = Events::with_capacity(10);
raise(SIGUSR1).unwrap();
raise(SIGUSR2).unwrap();
poll.poll(&mut events, Some(Duration::from_secs(10)))
.unwrap();
let event = events.iter().next().unwrap();
assert!(event.readiness().is_readable());
let sigs: Vec<c_int> = signals.pending().collect();
assert_eq!(2, sigs.len());
assert!(sigs.contains(&SIGUSR1));
assert!(sigs.contains(&SIGUSR2));
// The self pipe shouldn't be completely empty after calling pending()
poll.poll(&mut events, Some(Duration::from_secs(0)))
.unwrap();
assert!(events.is_empty());
}
#[test]
#[serial]
fn mio_parallel_multiple() {
let mut signals = Signals::new(&[SIGUSR1]).unwrap();
let poll = Poll::new().unwrap();
let token = Token(0);
poll.register(&signals, token, Ready::readable(), PollOpt::level())
.unwrap();
let mut events = Events::with_capacity(10);
let thread_done = Arc::new(AtomicBool::new(false));
let done = Arc::clone(&thread_done);
thread::spawn(move || {
for _ in 0..10 {
// Wait some time to allow main thread to poll
thread::sleep(Duration::from_millis(25));
raise(SIGUSR1).unwrap();
}
done.store(true, Ordering::SeqCst);
// Raise a final signal so the main thread wakes up
// if it already called poll.
raise(SIGUSR1).unwrap();
});
while !thread_done.load(Ordering::SeqCst) {
poll.poll(&mut events, Some(Duration::from_secs(10)))
.unwrap();
let event = events.iter().next().unwrap();
assert!(event.readiness().is_readable());
assert_eq!(SIGUSR1, signals.pending().next().unwrap());
}
}

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#![cfg(feature = "support-v0_7")]
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::Arc;
use std::thread;
use std::time::Duration;
use mio_0_7::{Events, Interest, Poll, Token};
use signal_hook::consts::{SIGUSR1, SIGUSR2};
use signal_hook::low_level::raise;
use signal_hook_mio::v0_7::Signals;
use serial_test::serial;
use libc::c_int;
#[test]
#[serial]
fn mio_wakeup() {
let mut signals = Signals::new(&[SIGUSR1]).unwrap();
let mut poll = Poll::new().unwrap();
let token = Token(0);
poll.registry()
.register(&mut signals, token, Interest::READABLE)
.unwrap();
let mut events = Events::with_capacity(10);
// The self pipe shouldn't be readable yet
poll.poll(&mut events, Some(Duration::from_secs(0)))
.unwrap();
assert!(events.is_empty());
raise(SIGUSR1).unwrap();
poll.poll(&mut events, Some(Duration::from_secs(10)))
.unwrap();
let event = events.iter().next().unwrap();
assert!(event.is_readable());
assert_eq!(token, event.token());
let sig = signals.pending().next().unwrap();
assert_eq!(SIGUSR1, sig);
// The self pipe shouldn't be readable after consuming signals
poll.poll(&mut events, Some(Duration::from_secs(0)))
.unwrap();
assert!(events.is_empty());
}
#[test]
#[serial]
fn mio_multiple_signals() {
let mut signals = Signals::new(&[SIGUSR1, SIGUSR2]).unwrap();
let mut poll = Poll::new().unwrap();
let token = Token(0);
poll.registry()
.register(&mut signals, token, Interest::READABLE)
.unwrap();
let mut events = Events::with_capacity(10);
raise(SIGUSR1).unwrap();
raise(SIGUSR2).unwrap();
poll.poll(&mut events, Some(Duration::from_secs(10)))
.unwrap();
let event = events.iter().next().unwrap();
assert!(event.is_readable());
let sigs: Vec<c_int> = signals.pending().collect();
assert_eq!(2, sigs.len());
assert!(sigs.contains(&SIGUSR1));
assert!(sigs.contains(&SIGUSR2));
// The self pipe shouldn't be completely empty after calling pending()
poll.poll(&mut events, Some(Duration::from_secs(0)))
.unwrap();
assert!(events.is_empty());
}
#[test]
#[serial]
fn mio_parallel_multiple() {
let mut signals = Signals::new(&[SIGUSR1]).unwrap();
let mut poll = Poll::new().unwrap();
let token = Token(0);
poll.registry()
.register(&mut signals, token, Interest::READABLE)
.unwrap();
let mut events = Events::with_capacity(10);
let thread_done = Arc::new(AtomicBool::new(false));
let done = Arc::clone(&thread_done);
thread::spawn(move || {
for _ in 0..10 {
// Wait some time to allow main thread to poll
thread::sleep(Duration::from_millis(25));
raise(SIGUSR1).unwrap();
}
done.store(true, Ordering::SeqCst);
// Raise a final signal so the main thread wakes up
// if it already called poll.
raise(SIGUSR1).unwrap();
});
while !thread_done.load(Ordering::SeqCst) {
poll.poll(&mut events, Some(Duration::from_secs(10)))
.unwrap();
let event = events.iter().next().unwrap();
assert!(event.is_readable());
assert_eq!(SIGUSR1, signals.pending().next().unwrap());
}
}

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#![cfg(feature = "support-v0_8")]
use std::sync::atomic::{AtomicBool, Ordering};
use std::sync::Arc;
use std::thread;
use std::time::Duration;
use mio_0_8::{Events, Interest, Poll, Token};
use signal_hook::consts::{SIGUSR1, SIGUSR2};
use signal_hook::low_level::raise;
use signal_hook_mio::v0_8::Signals;
use serial_test::serial;
use libc::c_int;
#[test]
#[serial]
fn mio_wakeup() {
let mut signals = Signals::new(&[SIGUSR1]).unwrap();
let mut poll = Poll::new().unwrap();
let token = Token(0);
poll.registry()
.register(&mut signals, token, Interest::READABLE)
.unwrap();
let mut events = Events::with_capacity(10);
// The self pipe shouldn't be readable yet
poll.poll(&mut events, Some(Duration::from_secs(0)))
.unwrap();
assert!(events.is_empty());
raise(SIGUSR1).unwrap();
poll.poll(&mut events, Some(Duration::from_secs(10)))
.unwrap();
let event = events.iter().next().unwrap();
assert!(event.is_readable());
assert_eq!(token, event.token());
let sig = signals.pending().next().unwrap();
assert_eq!(SIGUSR1, sig);
// The self pipe shouldn't be readable after consuming signals
poll.poll(&mut events, Some(Duration::from_secs(0)))
.unwrap();
assert!(events.is_empty());
}
#[test]
#[serial]
fn mio_multiple_signals() {
let mut signals = Signals::new(&[SIGUSR1, SIGUSR2]).unwrap();
let mut poll = Poll::new().unwrap();
let token = Token(0);
poll.registry()
.register(&mut signals, token, Interest::READABLE)
.unwrap();
let mut events = Events::with_capacity(10);
raise(SIGUSR1).unwrap();
raise(SIGUSR2).unwrap();
poll.poll(&mut events, Some(Duration::from_secs(10)))
.unwrap();
let event = events.iter().next().unwrap();
assert!(event.is_readable());
let sigs: Vec<c_int> = signals.pending().collect();
assert_eq!(2, sigs.len());
assert!(sigs.contains(&SIGUSR1));
assert!(sigs.contains(&SIGUSR2));
// The self pipe shouldn't be completely empty after calling pending()
poll.poll(&mut events, Some(Duration::from_secs(0)))
.unwrap();
assert!(events.is_empty());
}
#[test]
#[serial]
fn mio_parallel_multiple() {
let mut signals = Signals::new(&[SIGUSR1]).unwrap();
let mut poll = Poll::new().unwrap();
let token = Token(0);
poll.registry()
.register(&mut signals, token, Interest::READABLE)
.unwrap();
let mut events = Events::with_capacity(10);
let thread_done = Arc::new(AtomicBool::new(false));
let done = Arc::clone(&thread_done);
thread::spawn(move || {
for _ in 0..10 {
// Wait some time to allow main thread to poll
thread::sleep(Duration::from_millis(25));
raise(SIGUSR1).unwrap();
}
done.store(true, Ordering::SeqCst);
// Raise a final signal so the main thread wakes up
// if it already called poll.
raise(SIGUSR1).unwrap();
});
while !thread_done.load(Ordering::SeqCst) {
poll.poll(&mut events, Some(Duration::from_secs(10)))
.unwrap();
let event = events.iter().next().unwrap();
assert!(event.is_readable());
assert_eq!(SIGUSR1, signals.pending().next().unwrap());
}
}