1 files changed, 58 insertions, 0 deletions
diff --git a/third_party/rust/tokio/src/process/unix/driver.rs b/third_party/rust/tokio/src/process/unix/driver.rs
new file mode 100644
index 0000000000..84dc8fbd02
--- /dev/null
+++ b/third_party/rust/tokio/src/process/unix/driver.rs
@@ -0,0 +1,58 @@
+#![cfg_attr(not(feature = "rt"), allow(dead_code))]
+
+//! Process driver.
+
+use crate::park::Park;
+use crate::process::unix::GlobalOrphanQueue;
+use crate::signal::unix::driver::{Driver as SignalDriver, Handle as SignalHandle};
+
+use std::io;
+use std::time::Duration;
+
+/// Responsible for cleaning up orphaned child processes on Unix platforms.
+#[derive(Debug)]
+pub(crate) struct Driver {
+    park: SignalDriver,
+    signal_handle: SignalHandle,
+}
+
+// ===== impl Driver =====
+
+impl Driver {
+    /// Creates a new signal `Driver` instance that delegates wakeups to `park`.
+    pub(crate) fn new(park: SignalDriver) -> Self {
+        let signal_handle = park.handle();
+
+        Self {
+            park,
+            signal_handle,
+        }
+    }
+}
+
+// ===== impl Park for Driver =====
+
+impl Park for Driver {
+    type Unpark = <SignalDriver as Park>::Unpark;
+    type Error = io::Error;
+
+    fn unpark(&self) -> Self::Unpark {
+        self.park.unpark()
+    }
+
+    fn park(&mut self) -> Result<(), Self::Error> {
+        self.park.park()?;
+        GlobalOrphanQueue::reap_orphans(&self.signal_handle);
+        Ok(())
+    }
+
+    fn park_timeout(&mut self, duration: Duration) -> Result<(), Self::Error> {
+        self.park.park_timeout(duration)?;
+        GlobalOrphanQueue::reap_orphans(&self.signal_handle);
+        Ok(())
+    }
+
+    fn shutdown(&mut self) {
+        self.park.shutdown()
+    }
+}