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 *  Copyright (c) 2014-2019 Appsicle
 *  Copyright (c) 2019-2020 QuestDB
 *
 *  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
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 *  Unless required by applicable law or agreed to in writing, software
 *  distributed under the License is distributed on an "AS IS" BASIS,
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package io.questdb.mp;

import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;

public class BlockingWaitStrategy extends AbstractWaitStrategy {
    private final Lock lock = new ReentrantLock();
    private final Condition condition = lock.newCondition();

    @Override
    public boolean acceptSignal() {
        return true;
    }

    @Override
    public void await() {
        lock.lock();
        try {
            if (alerted) {
                throw AlertedException.INSTANCE;
            }
            condition.awaitUninterruptibly();
        } finally {
            lock.unlock();
        }
    }

    @Override
    public void signal() {
        lock.lock();
        try {
            condition.signalAll();
        } finally {
            lock.unlock();
        }

    }
}