Proper ctrl+c handling in Windows (fix #508)

src/ctrlc/unix.rs

@@ -1,27 +1,10 @@
 //! SIGINT handling in Unix systems.
-use lazy_static::lazy_static;
+use crate::ctrlc::interrupted::set_interrupted;
 use nix::sys::signal;
-use std::sync::atomic::{AtomicBool, Ordering};
-
-lazy_static! {
-    /// A global variable telling whether the application has been interrupted.
-    static ref INTERRUPTED: AtomicBool = AtomicBool::new(false);
-}
-
-/// Tells whether the program has been interrupted
-pub fn interrupted() -> bool {
-    INTERRUPTED.load(Ordering::SeqCst)
-}
-
-/// Clears the interrupted flag
-pub fn unset_interrupted() {
-    debug_assert!(INTERRUPTED.load(Ordering::SeqCst));
-    INTERRUPTED.store(false, Ordering::SeqCst)
-}
 
 /// Handle SIGINT. Set the interruption flag.
 extern "C" fn handle_sigint(_: i32) {
-    INTERRUPTED.store(true, Ordering::SeqCst)
+    set_interrupted()
 }
 
 /// Set the necessary signal handlers.