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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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* 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).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
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*
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*/
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;
// When -Xrs is specified the user is responsible for
// ensuring that shutdown hooks are run by calling
// System.exit()
try {
Signal.handle(new Signal("HUP"), sh);
} catch (IllegalArgumentException e) {
}
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
*/
}
}