BEGIN LICENSE BLOCK *****
Version: EPL 2.0/GPL 2.0/LGPL 2.1
The contents of this file are subject to the Eclipse Public
License Version 2.0 (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-v20.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 Charles O Nutter 
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 /***** BEGIN LICENSE BLOCK *****
 * Version: EPL 2.0/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Eclipse Public
 * License Version 2.0 (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-v20.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 Charles O Nutter <headius@headius.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.internal.runtime;

import org.jruby.Ruby;
import org.jruby.RubyModule;
import org.jruby.RubyProc;
import org.jruby.RubyThread;
import org.jruby.exceptions.JumpException;
import org.jruby.exceptions.MainExitException;
import org.jruby.exceptions.ThreadKill;
import org.jruby.runtime.Block;
import org.jruby.runtime.RubyEvent;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.util.log.Logger;
import org.jruby.util.log.LoggerFactory;

public class RubyRunnable implements ThreadedRunnable {

    private static final Logger LOG = LoggerFactory.getLogger(RubyRunnable.class);

    private final Ruby runtime;
    private final RubyProc proc;
    private final IRubyObject[] arguments;
    private final RubyThread rubyThread;

    private Thread javaThread;
    private static boolean warnedAboutTC = false;

    public RubyRunnable(RubyThread rubyThread, IRubyObject[] args, Block currentBlock) {
        this.rubyThread = rubyThread;
        this.runtime = rubyThread.getRuntime();

        proc = runtime.newProc(Block.Type.THREAD, currentBlock);
        this.arguments = args;
    }

    @Deprecated
    public RubyThread getRubyThread() {
        return rubyThread;
    }

    public Thread getJavaThread() {
        return javaThread;
    }

    @Override
    public void run() {
        javaThread = Thread.currentThread();
        ThreadContext context = runtime.getThreadService().registerNewThread(rubyThread);

        // set thread context JRuby classloader here, for Ruby-owned thread
        ClassLoader oldContextClassLoader = null;
        try {
            oldContextClassLoader = javaThread.getContextClassLoader();
            javaThread.setContextClassLoader(runtime.getJRubyClassLoader());
        } catch (SecurityException se) {
            // can't set TC classloader
            if (!warnedAboutTC && runtime.getInstanceConfig().isVerbose()) {
                warnedAboutTC = true;
                LOG.info("WARNING: Security restrictions disallowed setting context classloader for Ruby threads.");
            }
        }

        rubyThread.beforeStart();

        // uber-ThreadKill catcher, since it should always just mean "be dead"
        try {
            // Push a frame for the toplevel of the thread

            // Call the thread's code
            Block threadBlock = proc.getBlock();
            RubyModule frameClass = threadBlock.getFrame().getKlazz();
            String file = threadBlock.getBinding().getFile();
            int line = threadBlock.getBinding().getLine();
            try {
                if (runtime.hasEventHooks()) context.trace(RubyEvent.THREAD_BEGIN, null, frameClass, file, line);
                IRubyObject result = proc.call(context, arguments);
                if (runtime.hasEventHooks()) context.trace(RubyEvent.THREAD_END, null, frameClass, file, line);
                rubyThread.cleanTerminate(result);
            } catch (MainExitException mee) {
                // Someone called exit!, so we need to kill the main thread
                runtime.getThreadService().getMainThread().kill();
            } catch (Throwable t) {
                rubyThread.exceptionRaised(t);
            } finally {
                rubyThread.dispose();

                // restore context classloader, in case we're using a thread pool
                try {
                    javaThread.setContextClassLoader(oldContextClassLoader);
                } catch (SecurityException se) {
                    // can't set TC classloader
                    if (!warnedAboutTC && runtime.getInstanceConfig().isVerbose()) {
                        warnedAboutTC = true;
                        LOG.info("WARNING: Security restrictions disallowed setting context classloader for Ruby threads.");
                    }
                }

                // dump profile, if any
                if (runtime.getInstanceConfig().isProfilingEntireRun()) {
                    runtime.printProfileData(context.getProfileCollection());
                }
            }
        } catch (ThreadKill tk) {
            // be dead
        }
    }
}