1 /*
 2  * Copyright (c) 2002, 2023, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.  Oracle designates this
 8  * particular file as subject to the "Classpath" exception as provided
 9  * by Oracle in the LICENSE file that accompanied this code.
10  *
11  * This code is distributed in the hope that it will be useful, but WITHOUT
12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
14  * version 2 for more details (a copy is included in the LICENSE file that
15  * accompanied this code).
16  *
17  * You should have received a copy of the GNU General Public License version
18  * 2 along with this work; if not, write to the Free Software Foundation,
19  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
20  *
21  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
22  * or visit www.oracle.com if you need additional information or have any
23  * questions.
24  */
25 
26 package sun.nio.ch;
27 
28 public class NativeThread {
29     private final Thread thread;
30 
31     private NativeThread(Thread thread) {
32         this.thread = thread;
33     }
34 
35     Thread thread() {
36         return thread;
37     }
38 
39     static NativeThread current() {
40         Thread t = Thread.currentThread();
41         if (t.isVirtual()) {
42             return new NativeThread(t);
43         } else {
44             return null;
45         }
46     }
47 
48     static NativeThread currentNativeThread() {
49         return null;
50     }
51 
52     void signal() {
53         throw new UnsupportedOperationException();
54     }
55 
56     static boolean isVirtualThread(NativeThread nt) {
57         return nt != null;
58     }
59 
60     static boolean isNativeThread(NativeThread nt) {
61         return false;
62     }
63 }