Add a macro for usage

src/lib.rs

@@ -7,12 +7,14 @@
 extern crate alloc;
 extern crate smallvec;
 
+
+pub use cursor::*;
+pub use entry::*;
+pub use mark::*;
+pub use xarray::*;
+
 use cow::*;
-use cursor::*;
-use entry::*;
-use mark::*;
 use node::*;
-pub use xarray::*;
 
 mod cow;
 mod cursor;
@@ -47,9 +49,5 @@ mod std_specific {
         }
     }
 
-    pub struct StdMutex;
-
-    impl XLock for StdMutex {
-        type Lock<T> = Mutex<T>;
-    }
+    abstract_lock_to!(Mutex, StdMutex);
 }

src/xarray.rs

@@ -236,6 +236,17 @@ pub trait XLock {
     }
 }
 
+#[macro_export]
+macro_rules! abstract_lock_to {
+    ($lock_type:ident, $name:ident) => {
+        pub struct $name;
+
+        impl XLock for $name {
+            type Lock<T> = $lock_type<T>;
+        }
+    };
+}
+
 pub struct Range<'a, I, L, M>
 where
     I: ItemEntry,