/*
* Copyright 1999-2001 Sun Microsystems, Inc. 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. Sun designates this
* particular file as subject to the "Classpath" exception as provided
* by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*/
package java.lang;
import sun.misc.Signal;
import sun.misc.SignalHandler;
/**
* 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 SignalHandler 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;
SignalHandler sh = new SignalHandler() {
public void handle(Signal sig) {
Shutdown.exit(sig.getNumber() + 0200);
}
};
handler = sh;
try {
Signal.handle(new Signal("HUP"), sh);
Signal.handle(new Signal("INT"), sh);
Signal.handle(new Signal("TERM"), sh);
} catch (IllegalArgumentException e) {
// When -Xrs is specified the user is responsible for
// ensuring that shutdown hooks are run by calling
// System.exit()
}
}
static void teardown() {
/* The current sun.misc.Signal class does not support
* the cancellation of handlers
*/
}
}