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/**
* Copyright 2011 JogAmp Community. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without modification, are
* permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice, this list of
* conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice, this list
* of conditions and the following disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
* FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* The views and conclusions contained in the software and documentation are those of the
* authors and should not be interpreted as representing official policies, either expressed
* or implied, of JogAmp Community.
*/
package jogamp.common.util.locks;
import java.io.PrintStream;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import com.jogamp.common.util.locks.Lock;
/**
* Functionality enabled if {@link Lock#DEBUG} is <code>true</code>.
*/
public class LockDebugUtil {
private static final ThreadLocal<ArrayList<Throwable>> tlsLockedStacks;
private static final List<Throwable> dummy;
static {
if(Lock.DEBUG) {
tlsLockedStacks = new ThreadLocal<ArrayList<Throwable>>();
dummy = null;
} else {
tlsLockedStacks = null;
dummy = new ArrayList<Throwable>(0);
}
}
public static List<Throwable> getRecursiveLockTrace() {
if(Lock.DEBUG) {
ArrayList<Throwable> ls = tlsLockedStacks.get();
if(null == ls) {
ls = new ArrayList<Throwable>();
tlsLockedStacks.set(ls);
}
return ls;
} else {
return dummy;
}
}
public static void dumpRecursiveLockTrace(final PrintStream out) {
if(Lock.DEBUG) {
final List<Throwable> ls = getRecursiveLockTrace();
if(null!=ls && ls.size()>0) {
int j=0;
out.println("TLSLockedStacks: locks "+ls.size());
for(final Iterator<Throwable> i=ls.iterator(); i.hasNext(); j++) {
out.print(j+": ");
i.next().printStackTrace(out);
}
}
}
}
}
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