1 /* 2 * Copyright (c) 1998, 2016, 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 jdk.internal.misc; 26 27 /** 28 * Internal interface implemented by private extension of {@link java.util.Signal}. 29 */ 30 public interface NativeSignal { 31 32 /** 33 * Register a native handler of the Signal. 34 * Given handler replaces current signal handler. 35 * 36 * @param nativeHandler a native signal handler 37 * @throws UnsupportedOperationException if handling of the signal is 38 * not supported by the implementation 39 */ 40 void register(long nativeHandler); 41 42 /** 43 * Unregister a native handler of the Signal. 44 * If given nativeHandler is the most recently registered handler for the signal, 45 * signal handling is restored to the state prior to registering given nativeHandler 46 * and the method returns {@code true}; otherwise the currently registered 47 * handler is left unchanged and {@code false} is returned. 48 * 49 * @param nativeHandler a native signal handler 50 * @return {@code true} if given nativeHandler was the most recently registered handler 51 * and was unregistered, otherwise {@code false} 52 */ 53 boolean unregister(long nativeHandler); 54 }