use async-lock for RwLock and Barrier

Cargo.toml

@@ -52,8 +52,8 @@ std = [
   "slab",
   "wasm-bindgen-futures",
   "futures-channel",
-  "async-mutex",
   "async-channel",
+  "async-lock",
 ]
 alloc = [
   "futures-core/alloc",
@@ -64,7 +64,7 @@ tokio03 = ["async-global-executor/tokio03"]
 
 [dependencies]
 async-attributes = { version = "1.1.1", optional = true }
-async-mutex = { version = "1.1.3", optional = true }
+async-lock = { version = "2.3.0", optional = true }
 crossbeam-utils = { version = "0.8.0", optional = true }
 futures-core = { version = "0.3.4", optional = true, default-features = false }
 futures-io = { version = "0.3.4", optional = true }

src/sync/mod.rs

@@ -177,22 +177,20 @@
 pub use std::sync::{Arc, Weak};
 
 #[doc(inline)]
-pub use async_mutex::{Mutex, MutexGuard};
+pub use async_lock::{Mutex, MutexGuard, MutexGuardArc};
 
-pub use rwlock::{RwLock, RwLockReadGuard, RwLockWriteGuard};
-
-mod rwlock;
+#[doc(inline)]
+pub use async_lock::{RwLock, RwLockReadGuard, RwLockUpgradableReadGuard, RwLockWriteGuard};
 
 cfg_unstable! {
-    pub use barrier::{Barrier, BarrierWaitResult};
+    pub use async_lock::{Barrier, BarrierWaitResult};
     #[allow(deprecated)]
     pub use channel::{channel, Sender, Receiver, RecvError, TryRecvError, TrySendError};
     pub use condvar::Condvar;
+    pub(crate) use waker_set::WakerSet;
 
-    mod barrier;
     mod condvar;
     mod channel;
-}
 
-pub(crate) mod waker_set;
-pub(crate) use waker_set::WakerSet;
+    pub(crate) mod waker_set;
+}