chore: use ready macro from futures-core (#1300)

tokio-sync/src/lib.rs

@@ -21,19 +21,6 @@ macro_rules! debug {
     }
 }
 
-/// Unwrap a ready value or propagate `Poll::Pending`.
-#[macro_export]
-macro_rules! ready {
-    ($e:expr) => {{
-        use std::task::Poll::{Pending, Ready};
-
-        match $e {
-            Ready(v) => v,
-            Pending => return Pending,
-        }
-    }};
-}
-
 macro_rules! if_fuzz {
     ($($t:tt)*) => {{
         if false { $($t)* }

tokio-sync/src/lock.rs

@@ -42,6 +42,7 @@
 
 use crate::semaphore;
 
+use futures_core::ready;
 use std::cell::UnsafeCell;
 use std::fmt;
 use std::future::Future;

tokio-sync/src/oneshot.rs

@@ -2,6 +2,7 @@
 
 use crate::loom::{sync::atomic::AtomicUsize, sync::CausalCell};
 
+use futures_core::ready;
 use std::fmt;
 use std::future::Future;
 use std::mem::{self, ManuallyDrop};

tokio-sync/src/watch.rs

@@ -58,6 +58,7 @@ use crate::task::AtomicWaker;
 use core::task::Poll::{Pending, Ready};
 use core::task::{Context, Poll};
 use fnv::FnvHashMap;
+use futures_core::ready;
 use std::ops;
 use std::sync::atomic::AtomicUsize;
 use std::sync::atomic::Ordering::SeqCst;