Assert state in sys/unsupported's RwLock::write_unlock.

m-ou-se · Joshua Nelson · web-flow · commit f1c3edbfaba6 · 2020-10-09T00:39:03.000+02:00
Co-authored-by: Joshua Nelson &lt;joshua@yottadb.com&gt;
diff --git a/library/std/src/sys/unsupported/rwlock.rs b/library/std/src/sys/unsupported/rwlock.rs
@@ -57,7 +57,7 @@ impl RWLock {
 
     #[inline]
     pub unsafe fn write_unlock(&self) {
-        self.mode.set(0);
+        assert_eq!(self.mode.replace(0), -1);
     }
 
     #[inline]

Original file line number	Diff line number	Diff line change
`@@ -57,7 +57,7 @@ impl RWLock {`
`57`	`57`
`58`	`58`	`#[inline]`
`59`	`59`	`pub unsafe fn write_unlock(&self) {`
`60`		`- self.mode.set(0);`
	`60`	`+ assert_eq!(self.mode.replace(0), -1);`
`61`	`61`	`}`
`62`	`62`
`63`	`63`	`#[inline]`