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* as indicated by the @author tags. See the copyright.txt file in the
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*
* This 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 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; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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*/
package org.infinispan.util.concurrent.locks.containers;
import net.jcip.annotations.ThreadSafe;
import org.infinispan.context.InvocationContextContainer;
import org.infinispan.util.concurrent.locks.OwnableReentrantLock;
import java.util.Arrays;
/**
* A LockContainer that holds {@link org.infinispan.util.concurrent.locks.OwnableReentrantLock}s.
*
* @author Manik Surtani (<a href="mailto:manik@jboss.org">manik@jboss.org</a>)
* @see ReentrantStripedLockContainer
* @see org.infinispan.util.concurrent.locks.OwnableReentrantLock
* @since 4.0
*/
@ThreadSafe
public class OwnableReentrantStripedLockContainer extends AbstractStripedLockContainer {
OwnableReentrantLock[] sharedLocks;
InvocationContextContainer icc;
/**
* Creates a new LockContainer which uses a certain number of shared locks across all elements that need to be
* locked.
*
* @param concurrencyLevel concurrency level for number of stripes to create. Stripes are created in powers of two,
* with a minimum of concurrencyLevel created.
* @param icc invocation context container to use
*/
public OwnableReentrantStripedLockContainer(int concurrencyLevel, InvocationContextContainer icc) {
this.icc = icc;
initLocks(calculateNumberOfSegments(concurrencyLevel));
}
protected void initLocks(int numLocks) {
sharedLocks = new OwnableReentrantLock[numLocks];
for (int i = 0; i < numLocks; i++) sharedLocks[i] = new OwnableReentrantLock(icc);
}
public final OwnableReentrantLock getLock(Object object) {
return sharedLocks[hashToIndex(object)];
}
public final boolean ownsLock(Object object, Object owner) {
OwnableReentrantLock lock = getLock(object);
return owner.equals(lock.getOwner());
}
public final boolean isLocked(Object object) {
OwnableReentrantLock lock = getLock(object);
return lock.isLocked();
}
public final int getNumLocksHeld() {
int i = 0;
for (OwnableReentrantLock l : sharedLocks) if (l.isLocked()) i++;
return i;
}
public String toString() {
return "OwnableReentrantStripedLockContainer{" +
"sharedLocks=" + (sharedLocks == null ? null : Arrays.asList(sharedLocks)) +
'}';
}
public int size() {
return sharedLocks.length;
}
}