[libc] fix unlock detection

SchrodingerZhu · SchrodingerZhu · commit f1cf11d9b5b9 · 2024-05-23T23:38:56.000-04:00
diff --git a/libc/src/__support/threads/linux/raw_mutex.h b/libc/src/__support/threads/linux/raw_mutex.h
@@ -107,7 +107,7 @@ class RawMutex {
     if (prev == CONTENTED)
       wake(is_pshared);
     // Detect invalid unlock operation.
-    return prev == LOCKED;
+    return prev != UNLOCKED;
   }
 };
 } // namespace internal

Original file line number	Diff line number	Diff line change
`@@ -107,7 +107,7 @@ class RawMutex {`
`107`	`107`	`if (prev == CONTENTED)`
`108`	`108`	`wake(is_pshared);`
`109`	`109`	`// Detect invalid unlock operation.`
`110`		`- return prev == LOCKED;`
	`110`	`+ return prev != UNLOCKED;`
`111`	`111`	`}`
`112`	`112`	`};`
`113`	`113`	`} // namespace internal`