src/java.base/windows/classes/sun/nio/ch/NativeThread.java - master - githubmirror/panama-vector

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

53 строки2 KB

Alan Bateman

8374170: I/O Poller updates

06 фев 2026, 18:19

06 фев 2026, 18:19cd5256d

/*
 * Copyright (c) 2002, 2025, 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
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

package sun.nio.ch;

import java.util.concurrent.locks.LockSupport;

public class NativeThread {
    private NativeThread() { }

    /**
     * Returns the Thread to signal the current thread or {@code null} if the current
     * thread cannot be signalled.
     */
    public static Thread threadToSignal() {
        Thread thread = Thread.currentThread();
        return thread.isVirtual() ? thread : null;
    }

    /**
     * Signals the given thread.
     * @throws UnsupportedOperationException is not supported
     */
    public static void signal(Thread thread) {
        if (thread.isVirtual()) {
            LockSupport.unpark(thread);
        } else {
            throw new UnsupportedOperationException();
        }
    }
}