/***** BEGIN LICENSE BLOCK *****
* Version: CPL 1.0/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Common Public
* License Version 1.0 (the "License"); you may not use this file
* except in compliance with the License. You may obtain a copy of
* the License at http://www.eclipse.org/legal/cpl-v10.html
*
* Software distributed under the License is distributed on an "AS
* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
* implied. See the License for the specific language governing
* rights and limitations under the License.
*
* Copyright (C) 2007 Ola Bini <ola.bini@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
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package org.jruby.util;
import org.jruby.Ruby;
import org.jruby.RubyModule;
import org.jruby.RubyProc;
import org.jruby.exceptions.MainExitException;
import org.jruby.exceptions.RaiseException;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.runtime.CallBlock;
import org.jruby.runtime.Arity;
import org.jruby.runtime.Block;
import org.jruby.runtime.BlockCallback;
import org.jruby.runtime.ThreadContext;
import sun.misc.Signal;
import sun.misc.SignalHandler;
/**
* @author <a href="mailto:ola.bini@gmail.com">Ola Bini</a>
*/
public class SunSignalFacade implements SignalFacade {
private final static class JRubySignalHandler implements SignalHandler {
private final Ruby runtime;
private final IRubyObject block;
private final IRubyObject signal_object;
private final String signal;
public JRubySignalHandler(Ruby runtime, IRubyObject block, IRubyObject signal_object, String signal) {
this.runtime = runtime;
this.block = block;
this.signal_object = signal_object;
this.signal = signal;
}
public void handle(Signal signal) {
ThreadContext context = runtime.getCurrentContext();
try {
block.callMethod(context, "call");
} catch(RaiseException e) {
try {
runtime.getThread().callMethod(context, "main")
.callMethod(context, "raise", e.getException());
} catch(Exception ignored) {}
} catch (MainExitException mee) {
runtime.getThreadService().getMainThread().kill();
} finally {
Signal.handle(new Signal(this.signal), this);
}
}
}
public IRubyObject trap(final IRubyObject recv, IRubyObject arg1, IRubyObject arg2, IRubyObject arg3) {
final JRubySignalHandler handler = new JRubySignalHandler(recv.getRuntime(), arg1, arg2, arg3.toString());
final SignalHandler oldHandler;
try {
oldHandler = Signal.handle(new Signal(handler.signal), handler);
} catch (Exception e) {
throw recv.getRuntime().newArgumentError(e.getMessage());
}
if(oldHandler instanceof JRubySignalHandler) {
return ((JRubySignalHandler)oldHandler).block;
} else {
return RubyProc.newProc(recv.getRuntime(), CallBlock.newCallClosure(recv, (RubyModule)recv,
Arity.noArguments(), new BlockCallback(){
public IRubyObject call(ThreadContext context, IRubyObject[] args, Block block) {
oldHandler.handle(new Signal(handler.signal));
return recv.getRuntime().getNil();
}
}, recv.getRuntime().getCurrentContext()), Block.Type.NORMAL);
}
}
}// SunSignalFacade