signal: move into tokio-net (#1463)

tokio-net/tests/signal_multi_loop.rs

@@ -0,0 +1,40 @@
+#![cfg(unix)]
+#![cfg(feature = "signal")]
+#![warn(rust_2018_idioms)]
+
+pub mod signal_support;
+use crate::signal_support::*;
+
+use std::sync::mpsc::channel;
+use std::thread;
+
+#[test]
+fn multi_loop() {
+    // An "ordinary" (non-future) channel
+    let (sender, receiver) = channel();
+    // Run multiple times, to make sure there are no race conditions
+    for _ in 0..10 {
+        // Run multiple event loops, each one in its own thread
+        let threads: Vec<_> = (0..4)
+            .map(|_| {
+                let sender = sender.clone();
+                thread::spawn(move || {
+                    let mut rt = CurrentThreadRuntime::new().unwrap();
+                    let signal = Signal::new(SignalKind::hangup()).unwrap();
+                    sender.send(()).unwrap();
+                    let _ = run_with_timeout(&mut rt, signal.into_future());
+                })
+            })
+            .collect();
+        // Wait for them to declare they're ready
+        for &_ in threads.iter() {
+            receiver.recv().unwrap();
+        }
+        // Send a signal
+        send_signal(libc::SIGHUP);
+        // Make sure the threads terminated correctly
+        for t in threads {
+            t.join().unwrap();
+        }
+    }
+}