io.logspace.agent.shaded.mchange.v2.lang.ThreadUtils Maven / Gradle / Ivy
/*
* Distributed as part of c3p0 v.0.9.1.1
*
* Copyright (C) 2005 Machinery For Change, Inc.
*
* Author: Steve Waldman
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1, as
* published by the Free Software Foundation.
*
* This software 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 software; see the file LICENSE. If not, write to the
* Free Software Foundation, Inc., 59 Temple Place, Suite 330,
* Boston, MA 02111-1307, USA.
*/
package io.logspace.agent.shaded.mchange.v2.lang;
import io.logspace.agent.shaded.mchange.v2.log.*;
import java.lang.reflect.Method;
public final class ThreadUtils
{
private final static MLogger logger = MLog.getLogger( ThreadUtils.class );
final static Method holdsLock;
static
{
Method _holdsLock;
try
{ _holdsLock = Thread.class.getMethod("holdsLock", new Class[] { Object.class }); }
catch (NoSuchMethodException e)
{ _holdsLock = null; }
holdsLock = _holdsLock;
}
public static void enumerateAll( Thread[] threads )
{ ThreadGroupUtils.rootThreadGroup().enumerate( threads ); }
/**
* @returns null if cannot be determined, otherwise true or false
*/
public static Boolean reflectiveHoldsLock( Object o )
{
try
{
if (holdsLock == null)
return null;
else
return (Boolean) holdsLock.invoke( null, new Object[] { o } );
}
catch (Exception e)
{
if ( logger.isLoggable( MLevel.FINER ) )
logger.log( MLevel.FINER, "An Exception occurred while trying to call Thread.holdsLock( ... ) reflectively.", e);
return null;
}
}
private ThreadUtils()
{}
}