Upgrade rust/crates/tokio to 1.2.0

Test: make
Change-Id: Ib0f6a5201b51e9d122b6e867388a3856e16f803a

2 files changed, 27 insertions, 9 deletions

diff --git a/src/loom/std/atomic_u64.rs b/src/loom/std/atomic_u64.rs
index 206954f..a86a195 100644
--- a/src/loom/std/atomic_u64.rs
+++ b/src/loom/std/atomic_u64.rs
@@ -24,8 +24,8 @@ mod imp {
     }
 
     impl AtomicU64 {
-        pub(crate) fn new(val: u64) -> AtomicU64 {
-            AtomicU64 {
+        pub(crate) fn new(val: u64) -> Self {
+            Self {
                 inner: Mutex::new(val),
             }
         }
@@ -45,16 +45,31 @@ mod imp {
             prev
         }
 
-        pub(crate) fn compare_and_swap(&self, old: u64, new: u64, _: Ordering) -> u64 {
+        pub(crate) fn compare_exchange(
+            &self,
+            current: u64,
+            new: u64,
+            _success: Ordering,
+            _failure: Ordering,
+        ) -> Result<u64, u64> {
             let mut lock = self.inner.lock().unwrap();
-            let prev = *lock;
 
-            if prev != old {
-                return prev;
+            if *lock == current {
+                *lock = new;
+                Ok(current)
+            } else {
+                Err(*lock)
             }
+        }
 
-            *lock = new;
-            prev
+        pub(crate) fn compare_exchange_weak(
+            &self,
+            current: u64,
+            new: u64,
+            success: Ordering,
+            failure: Ordering,
+        ) -> Result<u64, u64> {
+            self.compare_exchange(current, new, success, failure)
         }
     }
 }
diff --git a/src/loom/std/mod.rs b/src/loom/std/mod.rs
index c3f74ef..b29cbee 100644
--- a/src/loom/std/mod.rs
+++ b/src/loom/std/mod.rs
@@ -74,7 +74,10 @@ pub(crate) mod sync {
         pub(crate) use crate::loom::std::atomic_u8::AtomicU8;
         pub(crate) use crate::loom::std::atomic_usize::AtomicUsize;
 
-        pub(crate) use std::sync::atomic::{fence, spin_loop_hint, AtomicBool, Ordering};
+        pub(crate) use std::sync::atomic::{fence, AtomicBool, Ordering};
+        // TODO: once we bump MSRV to 1.49+, use `hint::spin_loop` instead.
+        #[allow(deprecated)]
+        pub(crate) use std::sync::atomic::spin_loop_hint;
     }
 }