view src/goodjava/lucene/logging/SemaphoreLock.java @ 1544:35601f15ecc3

add lucene log tag and restore_from_log
author Franklin Schmidt <fschmidt@gmail.com>
date Sun, 20 Sep 2020 20:36:55 -0600
parents 634f6765830e
children
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package goodjava.lucene.logging;

import java.util.concurrent.Semaphore;
import java.util.concurrent.TimeUnit;


public final class SemaphoreLock {
	private final Semaphore semaphore = new Semaphore(1);

	public void unlock() {
		semaphore.release();
	}

	public boolean isLocked() {
		return semaphore.availablePermits() == 0;
	}

	public boolean tryLock(long time,TimeUnit unit) throws InterruptedException {
		return semaphore.tryAcquire(time,unit);
	}
}