src/java.base/windows/classes/sun/nio/ch/NativeThread.java

@@ -23,49 +23,41 @@
   * questions.
   */
  
  package sun.nio.ch;
  
+ public class NativeThread {
+     private final Thread thread;
  
- // Signalling operations on native threads
+     private NativeThread(Thread thread) {
+         this.thread = thread;
+     }
  
- public class NativeThread {
-     private static final long VIRTUAL_THREAD_ID = -1L;
+     Thread thread() {
+         return thread;
+     }
  
-     /**
-      * Returns the id of the current native thread if the platform can signal
-      * native threads, 0 if the platform can not signal native threads, or
-      * -1L if the current thread is a virtual thread.
-      */
-     public static long current() {
-         if (Thread.currentThread().isVirtual()) {
-             return VIRTUAL_THREAD_ID;
+     static NativeThread current() {
+         Thread t = Thread.currentThread();
+         if (t.isVirtual()) {
+             return new NativeThread(t);
          } else {
-             // no support for signalling threads on Windows
-             return 0;
+             return null;
          }
      }
  
-     /**
-      * Signals the given native thread.
-      *
-      * @throws IllegalArgumentException if tid is not a token to a native thread
-      */
-     static void signal(long tid) {
+     static NativeThread currentNativeThread() {
+         return null;
+     }
+ 
+     void signal() {
          throw new UnsupportedOperationException();
      }
  
-     /**
-      * Returns true the tid is the id of a native thread.
-      */
-     static boolean isNativeThread(long tid) {
-         return false;
+     static boolean isVirtualThread(NativeThread nt) {
+         return nt != null;
      }
  
-     /**
-      * Returns true if tid is -1L.
-      * @see #current()
-      */
-     static boolean isVirtualThread(long tid) {
-         return (tid == VIRTUAL_THREAD_ID);
+     static boolean isNativeThread(NativeThread nt) {
+         return false;
      }
  }