/***** BEGIN LICENSE BLOCK *****

* Version: EPL 1.0/GPL 2.0/LGPL 2.1

*

* The contents of this file are subject to the Eclipse 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/epl-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@ologix.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

* of those above. If you wish to allow use of your version of this file only

* under the terms of either the GPL or the LGPL, and not to allow others to

* use your version of this file under the terms of the EPL, indicate your

* decision by deleting the provisions above and replace them with the notice

* and other provisions required by the GPL or the LGPL. If you do not delete

* the provisions above, a recipient may use your version of this file under

* the terms of any one of the EPL, the GPL or the LGPL.

***** END LICENSE BLOCK *****/

package org.jruby;

import jnr.constants.platform.Signal;

import org.jruby.anno.JRubyMethod;

import org.jruby.anno.JRubyModule;

import org.jruby.internal.runtime.ThreadService;

import org.jruby.javasupport.util.RuntimeHelpers;

import org.jruby.runtime.Block;

import org.jruby.runtime.BlockCallback;

import org.jruby.runtime.ThreadContext;

import org.jruby.runtime.backtrace.BacktraceData;

import org.jruby.runtime.backtrace.TraceType.Gather;

import org.jruby.runtime.builtin.IRubyObject;

import org.jruby.util.SignalFacade;

import org.jruby.util.NoFunctionalitySignalFacade;

import java.util.*;

@JRubyModule(name="Signal")

public class RubySignal {

private final static SignalFacade SIGNALS = getSignalFacade();

private final static SignalFacade getSignalFacade() {

try {

Class realFacadeClass = Class.forName("org.jruby.util.SunSignalFacade");

return (SignalFacade)realFacadeClass.newInstance();

} catch(Throwable e) {

return new NoFunctionalitySignalFacade();

}

}

public static void createSignal(Ruby runtime) {

RubyModule mSignal = runtime.defineModule("Signal");

mSignal.defineAnnotatedMethods(RubySignal.class);

//registerThreadDumpSignalHandler(runtime);

}

@JRubyMethod(module = true)

public static IRubyObject list(ThreadContext context, IRubyObject recv) {

Ruby runtime = recv.getRuntime();

RubyHash names = RubyHash.newHash(runtime);

for (Signal s : Signal.values()) {

if (!s.description().startsWith("SIG")) continue;

if (!RUBY_18_SIGNALS.contains(s.description().substring(3))) continue;

// replace CLD with CHLD value

long longValue = s.longValue();

if (s == Signal.SIGCLD) longValue = Signal.SIGCHLD.longValue();

// omit unsupported signals

if (longValue >= 20000) continue;

names.op_aset(context, runtime.newString(s.description().substring("SIG".length())), runtime.newFixnum(longValue));

}

names.op_aset(context, runtime.newString("EXIT"), runtime.newFixnum(0));

return names;

}

@JRubyMethod(name = "__jtrap_kernel", required = 2, module = true)

public static IRubyObject __jtrap_kernel(final IRubyObject recv, IRubyObject block, IRubyObject sig) {

return SIGNALS.trap(recv, block, sig);

}

@JRubyMethod(name = "__jtrap_platform_kernel", required = 1, module = true)

public static IRubyObject __jtrap_platform_kernel(final IRubyObject recv, IRubyObject sig) {

return SIGNALS.restorePlatformDefault(recv, sig);

}

@JRubyMethod(name = "__jtrap_osdefault_kernel", required = 1, module = true)

public static IRubyObject __jtrap_osdefault_kernel(final IRubyObject recv, IRubyObject sig) {

return SIGNALS.restoreOSDefault(recv, sig);

}

@JRubyMethod(name = "__jtrap_ignore_kernel", required = 1, module = true)

public static IRubyObject __jtrap_restore_kernel(final IRubyObject recv, IRubyObject sig) {

return SIGNALS.ignore(recv, sig);

}

private static final Set<String> RUBY_18_SIGNALS;

static {

RUBY_18_SIGNALS = new HashSet<String>();

for (String name : new String[] {

"EXIT",

"HUP",

"INT",

"QUIT",

"ILL",

"TRAP",

"IOT",

"ABRT",

"EMT",

"FPE",

"KILL",

"BUS",

"SEGV",

"SYS",

"PIPE",

"ALRM",

"TERM",

"URG",

"STOP",

"TSTP",

"CONT",

"CHLD",

"CLD",

"TTIN",

"TTOU",

"IO",

"XCPU",

"XFSZ",

"VTALRM",

"PROF",

"WINCH",

"USR1",

"USR2",

"LOST",

"MSG",

"PWR",

"POLL",

"DANGER",

"MIGRATE",

"PRE",

"GRANT",

"RETRACT",

"SOUND",

"INFO",

}) {

RUBY_18_SIGNALS.add(name);

}

}

}// RubySignal