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use crate::Session;
use libc::c_int;
use nix::sys::signal::*;
use std::sync::*;
static SESSION: Mutex<Option<Arc<Mutex<Session>>>> = Mutex::new(None);
fn handle() {
let Ok(mut se) = SESSION.lock() else { return };
let Some(se) = se.as_mut() else { return };
let Ok(mut se) = se.lock() else { return };
se.ctrlc.pressed = true;
}
extern "C" fn c_handle(_signal: c_int) {
// cannot propagate panic into C-land
let _ = std::panic::catch_unwind(|| {
if let Err(e) = std::panic::catch_unwind(handle) {
eprintln!("{e:?}"); // might panic
}
});
}
#[derive(Default)]
pub struct CtrlC {
pressed: bool,
}
struct Teardown;
impl Drop for Teardown {
fn drop(&mut self) {
teardown();
}
}
fn teardown() {
unsafe {
let _ = signal(Signal::SIGINT, SigHandler::SigDfl);
}
if let Ok(mut se) = SESSION.lock() {
*se = None;
}
}
#[must_use]
pub fn setup(session: Arc<Mutex<Session>>) -> impl Drop {
*SESSION.lock().unwrap() = Some(session);
unsafe {
signal(Signal::SIGINT, SigHandler::Handler(c_handle))
.expect("failed to set ctrl+c signal handler");
}
Teardown
}
pub fn peek(session: &Session) -> bool {
session.ctrlc.pressed
}
pub fn pop(session: &mut Session) -> bool {
let x = session.ctrlc.pressed;
session.ctrlc.pressed = false;
x
}
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