src/java.base/share/classes/java/lang/BaseVirtualThread.java - master - githubmirror/jdk22

src/java.base/share/classes/java/lang/BaseVirtualThread.java

66 строк2 KB

Alan Bateman

8287496: Alternative virtual thread implementation that maps to OS thread

02 июн 2022, 12:02

02 июн 2022, 12:026ff2d89

/*
 * Copyright (c) 2022, 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 java.lang;

/**
 * Base class for virtual thread implementations.
 */
sealed abstract class BaseVirtualThread extends Thread
        permits VirtualThread, ThreadBuilders.BoundVirtualThread {

    /**
     * Initializes a virtual Thread.
     *
     * @param name thread name, can be null
     * @param characteristics thread characteristics
     * @param bound true when bound to an OS thread
     */
    BaseVirtualThread(String name, int characteristics, boolean bound) {
        super(name, characteristics, bound);
    }

    /**
     * Parks the current virtual thread until the parking permit is available or
     * the thread is interrupted.
     *
     * The behavior of this method when the current thread is not this thread
     * is not defined.
     */
    abstract void park();

    /**
     * Parks current virtual thread up to the given waiting time until the parking
     * permit is available or the thread is interrupted.
     *
     * The behavior of this method when the current thread is not this thread
     * is not defined.
     */
    abstract void parkNanos(long nanos);

    /**
     * Makes available the parking permit to the given this virtual thread.
     */
    abstract void unpark();
}