1 /* 2 * Copyright (c) 2022, 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 package java.lang; 26 27 /** 28 * Base class for virtual thread implementations. 29 */ 30 // Android-changed: TODO(b/346542404): Import the permitted subclasses. 31 /* sealed */ abstract class BaseVirtualThread extends Thread { 32 // permits VirtualThread, ThreadBuilders.BoundVirtualThread { 33 34 /** 35 * Initializes a virtual Thread. 36 * 37 * @param name thread name, can be null 38 * @param characteristics thread characteristics 39 * @param bound true when bound to an OS thread 40 */ BaseVirtualThread(String name, int characteristics, boolean bound)41 BaseVirtualThread(String name, int characteristics, boolean bound) { 42 super(name, characteristics, bound); 43 } 44 45 /** 46 * Parks the current virtual thread until the parking permit is available or 47 * the thread is interrupted. 48 * 49 * The behavior of this method when the current thread is not this thread 50 * is not defined. 51 */ park()52 abstract void park(); 53 54 /** 55 * Parks current virtual thread up to the given waiting time until the parking 56 * permit is available or the thread is interrupted. 57 * 58 * The behavior of this method when the current thread is not this thread 59 * is not defined. 60 */ parkNanos(long nanos)61 abstract void parkNanos(long nanos); 62 63 /** 64 * Makes available the parking permit to the given this virtual thread. 65 */ unpark()66 abstract void unpark(); 67 } 68 69