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

* Version: CPL 1.0/GPL 2.0/LGPL 2.1

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* License Version 1.0 (the "License"); you may not use this file

* except in compliance with the License. You may obtain a copy of

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* Software distributed under the License is distributed on an "AS

* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or

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* Copyright (C) 2007 Ola Bini <ola@ologix.com>

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* either of the GNU General Public License Version 2 or later (the "GPL"),

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package org.jruby;

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;

@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();

}

}

// NOTE: The indicies here match exactly the signal values; do not reorder

public static final String[] NAMES = {

"EXIT", "HUP", "INT", "QUIT", "ILL", "TRAP", "ABRT", "EMT",

"FPE", "KILL", "BUS", "SEGV", "SYS", "PIPE", "ALRM", "TERM", "URG",

"STOP", "TSTP", "CONT", "CHLD", "TTIN", "TTOU", "IO", "XCPU",

"XFSZ", "VTALRM", "PROF", "WINCH", "INFO", "USR1", "USR2"};

public static void createSignal(Ruby runtime) {

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

mSignal.defineAnnotatedMethods(RubySignal.class);

//registerThreadDumpSignalHandler(runtime);

}

@JRubyMethod(required = 1, optional = 1, module = true)

public static IRubyObject trap(ThreadContext context, IRubyObject recv, IRubyObject[] args, Block block) {

Ruby runtime = recv.getRuntime();

runtime.getLoadService().require("jsignal_internal");

return RuntimeHelpers.invoke(context, runtime.getKernel(), "__jtrap", args, block);

}

@JRubyMethod(module = true)

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

Ruby runtime = recv.getRuntime();

RubyHash names = RubyHash.newHash(runtime);

for (int i = 0; i < NAMES.length; i++) {

names.op_aset(context, runtime.newString(NAMES[i]), runtime.newFixnum(i));

}

// IOT is also 6

names.op_aset(context, runtime.newString("IOT"), runtime.newFixnum(6));

// CLD is also 20

names.op_aset(context, runtime.newString("CLD"), runtime.newFixnum(20));

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);

}

private static void registerThreadDumpSignalHandler(final Ruby runtime) {

final String threadDumpSignal = runtime.getInstanceConfig().getThreadDumpSignal();

if (threadDumpSignal != null && threadDumpSignal.length() > 0) {

SIGNALS.trap(runtime, new BlockCallback() {

public IRubyObject call(ThreadContext context, IRubyObject[] args, Block block) {

System.err.println("Ruby Thread Dump");

final ThreadService threadService = runtime.getThreadService();

RubyThread[] thrs = threadService.getActiveRubyThreads();

for (RubyThread th : thrs) {

System.err.println("\n" + th);

RubyException exc = new RubyException(runtime, runtime.getRuntimeError(), "");

ThreadContext tc = threadService.getThreadContextForThread(th);

if (tc != null) {

exc.setBacktraceData(new BacktraceData(th.javaBacktrace(), tc.createBacktrace2(0, false), false, false, Gather.NORMAL));

exc.printBacktrace(System.err);

} else {

System.err.println(" [no longer alive]");

}

}

return runtime.getNil();

}

}, threadDumpSignal);

}

}

}// RubySignal