signal: move into tokio-net (#1463)

tokio-net/tests/signal_drop_multi_loop.rs

@@ -0,0 +1,36 @@
+#![cfg(unix)]
+#![cfg(feature = "signal")]
+#![warn(rust_2018_idioms)]
+
+pub mod signal_support;
+use crate::signal_support::*;
+
+#[test]
+fn dropping_loops_does_not_cause_starvation() {
+    let (mut rt, signal) = {
+        let kind = SignalKind::user_defined1();
+
+        let mut first_rt = CurrentThreadRuntime::new().expect("failed to init first runtime");
+        let mut first_signal = Signal::new(kind).expect("failed to register first signal");
+
+        let mut second_rt = CurrentThreadRuntime::new().expect("failed to init second runtime");
+        let mut second_signal = Signal::new(kind).expect("failed to register second signal");
+
+        send_signal(libc::SIGUSR1);
+
+        let _ = run_with_timeout(&mut first_rt, first_signal.next())
+            .expect("failed to await first signal");
+
+        let _ = run_with_timeout(&mut second_rt, second_signal.next())
+            .expect("failed to await second signal");
+
+        drop(first_rt);
+        drop(first_signal);
+
+        (second_rt, second_signal)
+    };
+
+    send_signal(libc::SIGUSR1);
+
+    let _ = run_with_timeout(&mut rt, signal.into_future());
+}