8337124: (fs) sun.nio.fs.WindowsSecurity.enablePrivilege should pin when continuations supported

Reviewed-by: jpai, alanb

Author: Brian Burkhalter

src/java.base/windows/classes/sun/nio/fs/WindowsSecurity.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2008, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -25,8 +25,8 @@
 
 package sun.nio.fs;
 
-import jdk.internal.misc.PreviewFeatures;
 import jdk.internal.vm.Continuation;
+import jdk.internal.vm.ContinuationSupport;
 
 import static sun.nio.fs.WindowsNativeDispatcher.*;
 import static sun.nio.fs.WindowsConstants.*;
@@ -106,7 +106,7 @@ static Privilege enablePrivilege(String priv) {
         final boolean needToRevert = elevated;
 
         // prevent yielding with privileges
-        if (PreviewFeatures.isEnabled())
+        if (ContinuationSupport.isSupported())
             Continuation.pin();
 
         return () -> {
@@ -126,7 +126,7 @@ else if (needToRevert)
                 }
             } finally {
                 LocalFree(pLuid);
-                if (PreviewFeatures.isEnabled())
+                if (ContinuationSupport.isSupported())
                     Continuation.unpin();
             }
         };