zephyr: sync: Add methods to PinWeak

Add some missing methods to `PinWeak`, notably forwarding
`strong_count`, `weak_count`, and `ptr_eq` through to the inner type.

Signed-off-by: David Brown <[email protected]>

Author: d3zd3z

zephyr/src/sync.rs

@@ -57,6 +57,21 @@ mod pinweak {
                 .upgrade()
                 .map(|arc| unsafe { Pin::new_unchecked(arc) })
         }
+
+        /// Equivalent to [`Weak::strong_count`]
+        pub fn strong_count(&self) -> usize {
+            self.0.strong_count()
+        }
+
+        /// Equivalent to [`Weak::weak_count`]
+        pub fn weak_count(&self) -> usize {
+            self.0.weak_count()
+        }
+
+        /// Equivalent to [`Weak::ptr_eq`]
+        pub fn ptr_eq(&self, other: &Self) -> bool {
+            self.0.ptr_eq(&other.0)
+        }
     }
 }