shared reference to mutable static

Author: kennykerr

crates/tests/misc/implement/tests/identity.rs

@@ -1,26 +1,23 @@
 #![allow(non_snake_case)]
 
+use std::sync::atomic::*;
 use windows::{core::*, Foundation::*};
 
-static mut COUNTER: isize = 0;
+static COUNTER: AtomicIsize = AtomicIsize::new(0);
 
 #[implement(IStringable, IClosable)]
 struct Test(String);
 
 impl Test {
     fn new(value: &str) -> Self {
-        unsafe {
-            COUNTER += 1;
-        }
+        COUNTER.fetch_add(1, Ordering::Relaxed);
         Self(value.to_string())
     }
 }
 
 impl Drop for Test {
     fn drop(&mut self) {
-        unsafe {
-            COUNTER -= 1;
-        }
+        COUNTER.fetch_sub(1, Ordering::Release);
     }
 }
 
@@ -38,48 +35,47 @@ impl IClosable_Impl for Test_Impl {
 
 #[test]
 fn identity() -> Result<()> {
-    unsafe {
-        assert_eq!(COUNTER, 0);
-        {
-            let a: IStringable = Test::new("test").into();
-            assert!(a.ToString()? == "test");
+    assert_eq!(COUNTER.load(Ordering::Acquire), 0);
+    {
+        let a: IStringable = Test::new("test").into();
+        assert_eq!(COUNTER.load(Ordering::Acquire), 1);
+        assert!(a.ToString()? == "test");
 
-            let b: IClosable = a.cast()?;
-            b.Close()?;
+        let b: IClosable = a.cast()?;
+        b.Close()?;
 
-            let c: IUnknown = b.cast()?;
+        let c: IUnknown = b.cast()?;
 
-            let d: IInspectable = c.cast()?;
+        let d: IInspectable = c.cast()?;
 
-            assert!(a == d.cast()?);
-        }
-        {
-            let a: IUnknown = Test::new("test").into();
-            let b: IClosable = a.cast()?;
-            let c: IStringable = b.cast()?;
-            assert!(c.ToString()? == "test");
-        }
-        {
-            let a: IInspectable = Test::new("test").into();
-            let b: IStringable = a.cast()?;
-            assert!(b.ToString()? == "test");
-        }
-        {
-            let a: IInspectable = Test::new("test").into();
-            assert_eq!(a.GetRuntimeClassName()?, "Windows.Foundation.IStringable");
+        assert!(a == d.cast()?);
+    }
+    {
+        let a: IUnknown = Test::new("test").into();
+        let b: IClosable = a.cast()?;
+        let c: IStringable = b.cast()?;
+        assert!(c.ToString()? == "test");
+    }
+    {
+        let a: IInspectable = Test::new("test").into();
+        let b: IStringable = a.cast()?;
+        assert!(b.ToString()? == "test");
+    }
+    {
+        let a: IInspectable = Test::new("test").into();
+        assert_eq!(a.GetRuntimeClassName()?, "Windows.Foundation.IStringable");
 
-            let b: IStringable = a.cast()?;
-            let c: &IInspectable = &b.cast()?;
-            assert_eq!(c.GetRuntimeClassName()?, "Windows.Foundation.IStringable");
+        let b: IStringable = a.cast()?;
+        let c: &IInspectable = &b.cast()?;
+        assert_eq!(c.GetRuntimeClassName()?, "Windows.Foundation.IStringable");
 
-            let d: IClosable = a.cast()?;
-            let e: &IInspectable = (&d).into();
-            assert_eq!(e.GetRuntimeClassName()?, "Windows.Foundation.IClosable");
+        let d: IClosable = a.cast()?;
+        let e: &IInspectable = (&d).into();
+        assert_eq!(e.GetRuntimeClassName()?, "Windows.Foundation.IClosable");
 
-            let f: IInspectable = e.cast()?;
-            assert_eq!(f.GetRuntimeClassName()?, "Windows.Foundation.IStringable");
-        }
-        assert_eq!(COUNTER, 0);
-        Ok(())
+        let f: IInspectable = e.cast()?;
+        assert_eq!(f.GetRuntimeClassName()?, "Windows.Foundation.IStringable");
     }
+    assert_eq!(COUNTER.load(Ordering::Acquire), 0);
+    Ok(())
 }