/*
* Copyright 2012-2015 org.opencloudb.
*
* Licensed 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.opencloudb.util;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.locks.ReentrantLock;
/**
* @author mycat
*/
public class LockPerfMain {
public void tReentrantLock() {
System.currentTimeMillis();
ReentrantLock lock = new ReentrantLock();
long t1 = System.currentTimeMillis();
for (int i = 0; i < 10000000; i++) {
if (lock.tryLock())
try {
// ...
} finally {
lock.unlock();
}
}
long t2 = System.currentTimeMillis();
System.out.println("take time:" + (t2 - t1) + " ms.");
}
public void tAtomicBoolean() {
System.currentTimeMillis();
AtomicBoolean atomic = new AtomicBoolean();
long t1 = System.currentTimeMillis();
for (int i = 0; i < 10000000; i++) {
if (atomic.compareAndSet(false, true)) {
try {
// ...
} finally {
atomic.set(false);
}
}
}
long t2 = System.currentTimeMillis();
System.out.println("take time:" + (t2 - t1) + " ms.");
}
}