| /* |
| * Copyright (c) 1999, 2012, 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; |
| |
| import jdk.internal.misc.Signal; |
| |
| |
| /** |
| * Package-private utility class for setting up and tearing down |
| * platform-specific support for termination-triggered shutdowns. |
| * |
| * @author Mark Reinhold |
| * @since 1.3 |
| */ |
| |
| class Terminator { |
| |
| private static Signal.Handler handler = null; |
| |
| /* Invocations of setup and teardown are already synchronized |
| * on the shutdown lock, so no further synchronization is needed here |
| */ |
| |
| static void setup() { |
| if (handler != null) return; |
| Signal.Handler sh = new Signal.Handler() { |
| public void handle(Signal sig) { |
| Shutdown.exit(sig.getNumber() + 0200); |
| } |
| }; |
| handler = sh; |
| |
| // When -Xrs is specified the user is responsible for |
| // ensuring that shutdown hooks are run by calling |
| // System.exit() |
| try { |
| Signal.handle(new Signal("INT"), sh); |
| } catch (IllegalArgumentException e) { |
| } |
| try { |
| Signal.handle(new Signal("TERM"), sh); |
| } catch (IllegalArgumentException e) { |
| } |
| } |
| |
| static void teardown() { |
| /* The current sun.misc.Signal class does not support |
| * the cancellation of handlers |
| */ |
| } |
| |
| } |