| J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1999-2001 Sun Microsystems, Inc. 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. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package java.lang; |
| 27 | |
| 28 | import sun.misc.Signal; |
| 29 | import sun.misc.SignalHandler; |
| 30 | |
| 31 | |
| 32 | /** |
| 33 | * Package-private utility class for setting up and tearing down |
| 34 | * platform-specific support for termination-triggered shutdowns. |
| 35 | * |
| 36 | * @author Mark Reinhold |
| 37 | * @since 1.3 |
| 38 | */ |
| 39 | |
| 40 | class Terminator { |
| 41 | |
| 42 | private static SignalHandler handler = null; |
| 43 | |
| 44 | /* Invocations of setup and teardown are already synchronized |
| 45 | * on the shutdown lock, so no further synchronization is needed here |
| 46 | */ |
| 47 | |
| 48 | static void setup() { |
| 49 | if (handler != null) return; |
| 50 | SignalHandler sh = new SignalHandler() { |
| 51 | public void handle(Signal sig) { |
| 52 | Shutdown.exit(sig.getNumber() + 0200); |
| 53 | } |
| 54 | }; |
| 55 | handler = sh; |
| 56 | try { |
| 57 | Signal.handle(new Signal("HUP"), sh); |
| 58 | Signal.handle(new Signal("INT"), sh); |
| 59 | Signal.handle(new Signal("TERM"), sh); |
| 60 | } catch (IllegalArgumentException e) { |
| 61 | // When -Xrs is specified the user is responsible for |
| 62 | // ensuring that shutdown hooks are run by calling |
| 63 | // System.exit() |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | static void teardown() { |
| 68 | /* The current sun.misc.Signal class does not support |
| 69 | * the cancellation of handlers |
| 70 | */ |
| 71 | } |
| 72 | |
| 73 | } |