From d194a8972e00b4e970cf706cbec457de526e1242 Mon Sep 17 00:00:00 2001
From: Guillume DIDIER <guillaume.didier@inria.fr>
Date: Tue, 5 Jan 2021 11:49:50 +0100
Subject: [PATCH] Fix deprecation warning in turn_lock

---
 turn_lock/src/lib.rs | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/turn_lock/src/lib.rs b/turn_lock/src/lib.rs
index 124ad81..f00cef1 100644
--- a/turn_lock/src/lib.rs
+++ b/turn_lock/src/lib.rs
@@ -28,12 +28,13 @@ impl TurnLock {
     }
     pub fn next(&mut self) {
         assert_eq!(self.turn.load(Ordering::Relaxed), self.index);
-        let r = self.turn.compare_and_swap(
+        let r = self.turn.compare_exchange(
             self.index,
             (self.index + 1) % self.num_turns,
             Ordering::Release,
+            Ordering::Relaxed,
         );
-        if r != self.index {
+        if r.expect("Failed to release lock") != self.index {
             panic!("Released lock out of turn");
         }
     }