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

tokio-threadpool/Cargo.toml

@@ -25,6 +25,7 @@ publish = false
 [dependencies]
 tokio-executor = { version = "0.2.0", path = "../tokio-executor" }
 tokio-sync = { version = "0.2.0", path = "../tokio-sync" }
+futures-core-preview = "0.3.0-alpha.17"
 
 arc-waker = { git = "https://github.com/tokio-rs/async" }
 crossbeam-deque = "0.7.0"

tokio-threadpool/src/blocking.rs

@@ -1,5 +1,6 @@
 use crate::worker::Worker;
 
+use futures_core::ready;
 use std::error::Error;
 use std::fmt;
 use std::task::Poll;

tokio-threadpool/src/lib.rs

@@ -131,15 +131,6 @@
 
 pub mod park;
 
-macro_rules! ready {
-    ($e:expr) => {
-        match $e {
-            ::std::task::Poll::Ready(t) => t,
-            ::std::task::Poll::Pending => return ::std::task::Poll::Pending,
-        }
-    };
-}
-
 mod blocking;
 mod builder;
 mod callback;

tokio-threadpool/tests/blocking.rs

@@ -5,6 +5,7 @@ use tokio_test::*;
 use tokio_threadpool::*;
 
 use async_util::future::poll_fn;
+use futures_core::ready;
 use rand::*;
 use std::sync::atomic::Ordering::*;
 use std::sync::atomic::*;
@@ -13,15 +14,6 @@ use std::task::{Poll, Waker};
 use std::thread;
 use std::time::Duration;
 
-macro_rules! ready {
-    ($e:expr) => {
-        match $e {
-            ::std::task::Poll::Ready(t) => t,
-            ::std::task::Poll::Pending => return ::std::task::Poll::Pending,
-        }
-    };
-}
-
 #[test]
 fn basic() {
     let _ = ::env_logger::try_init();