From b2e528b5758bf852c2092dd5da9e680e66c8c1dd Mon Sep 17 00:00:00 2001
From: Zach Reizner <zachr@google.com>
Date: Wed, 28 Mar 2018 17:34:40 -0700
Subject: [PATCH] sys_util: impl Pollable for File

Files are Pollable because they have an FD. Whether this makes sense for
any specific `File` is not enforced, but it will never be unsafe or
undefined when used with Poller.

BUG=chromium:793688
TEST=None

Change-Id: I2ce7ffd1b408bcee5ffbb3738d26339aa0c466e0
Reviewed-on: https://chromium-review.googlesource.com/985617
Commit-Ready: Zach Reizner <zachr@chromium.org>
Tested-by: Zach Reizner <zachr@chromium.org>
Reviewed-by: Stephen Barber <smbarber@chromium.org>
---
 sys_util/src/poll.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sys_util/src/poll.rs b/sys_util/src/poll.rs
index d8ea45d877..96ab22d921 100644
--- a/sys_util/src/poll.rs
+++ b/sys_util/src/poll.rs
@@ -55,6 +55,12 @@ unsafe impl Pollable for UnixDatagram {
     }
 }
 
+unsafe impl Pollable for File {
+    fn pollable_fd(&self) -> RawFd {
+        self.as_raw_fd()
+    }
+}
+
 /// Used to poll multiple `Pollable` objects at once.
 ///
 /// # Example