/*
* Concept profile generation tool suite
* Copyright (C) 2015 Biosemantics Group, Erasmus University Medical Center,
* Rotterdam, The Netherlands
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published
* by the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>
*/
package org.erasmusmc.concurrency;
import java.util.LinkedList;
import java.util.Queue;
public class QueueSemaphore<T> {
private Queue<T> queue = new LinkedList<T>();
public synchronized void take(T value) {
queue.offer(value);
this.notify();
}
public synchronized T release() {
while(queue.isEmpty())
try {
wait();
} catch (InterruptedException e) {
e.printStackTrace();
}
return queue.poll();
}
}