/*
* $Id$
*
* Copyright (C) 2003-2014 JNode.org
*
* This library is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This library 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this library; If not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
package org.jnode.fs.jifs.directories;
import java.io.IOException;
import java.security.AccessController;
import java.security.PrivilegedAction;
import org.jnode.fs.FSDirectory;
import org.jnode.fs.FSEntry;
import org.jnode.fs.jifs.JIFSDirectory;
import org.jnode.fs.jifs.JIFSFile;
import org.jnode.fs.jifs.files.JIFSFthread;
/**
* Directory containing one file for each java.lang.thread. Based on the thread
* command.
*
* @author Andreas H\u00e4nel
*/
public class JIFSDthreads extends JIFSDirectory {
public JIFSDthreads() throws IOException {
super("threads");
refresh();
}
public JIFSDthreads(FSDirectory parent) throws IOException {
this();
setParent(parent);
}
public void refresh() {
super.clear();
AccessController.doPrivileged(new PrivilegedAction<Object>() {
@Override
public Object run() {
ThreadGroup grp = Thread.currentThread().getThreadGroup();
while (grp.getParent() != null) {
grp = grp.getParent();
}
addGroup(grp);
return null;
}
});
}
private void addGroup(final ThreadGroup grp) {
final int max = grp.activeCount() * 2;
final Thread[] ts = new Thread[max];
AccessController.doPrivileged(new PrivilegedAction<Object>() {
public Object run() {
grp.enumerate(ts, false);
return null;
}
});
for (int i = 0; i < max; i++) {
final Thread t = ts[i];
if (t != null) {
JIFSFile F = new JIFSFthread(t.getName(), t, this);
addFSE(F);
}
}
final int gmax = grp.activeGroupCount() * 2;
final ThreadGroup[] tgs = new ThreadGroup[gmax];
AccessController.doPrivileged(new PrivilegedAction<Object>() {
public Object run() {
grp.enumerate(tgs, false);
return null;
}
});
for (int i = 0; i < gmax; i++) {
final ThreadGroup tg = tgs[i];
if (tg != null) {
addGroup(tg);
}
}
}
public FSEntry getEntry(String name) {
return super.getEntry(name);
}
}