/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache 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.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.jena.shared;
import java.util.concurrent.locks.ReentrantLock;
/**
* A multiple-reader plus single-writer lock. This lock permits readers to obtain their locks under any condition, but
* allows only one writer at a time. Writers can acquire a read lock, and readers can acquire the write lock.
*
*/
public class LockMRPlusSW extends ReentrantLock implements Lock {
@Override
public void enterCriticalSection(final boolean readLockRequested) {
if (!readLockRequested) lock();
}
@Override
public void leaveCriticalSection() {
if (isHeldByCurrentThread()) unlock();
}
}