/*
 * The MIT License (MIT)
 *
 * Copyright (c) 2011-2020 Broad Institute, Aiden Lab, Rice University, Baylor College of Medicine
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 *  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 *  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 *  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 *  THE SOFTWARE.
 */

package juicebox.tools.dev;

import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

public class ParallelizedJuicerTools {

    public static void launchParallelizedCode(Runnable runnable) {
        launchParallelizedCode(Runtime.getRuntime().availableProcessors(), runnable);
    }

    public static void launchParallelizedCode(int numCPUThreads, Runnable runnable) {
        ExecutorService executor = Executors.newFixedThreadPool(numCPUThreads);
        for (int l = 0; l < numCPUThreads; l++) {
            Runnable worker = new Runnable() {
                @Override
                public void run() {
                    runnable.run();
                }
            };
            executor.execute(worker);
        }
        executor.shutdown();

        // Wait until all threads finish
        while (!executor.isTerminated()) {
        }
    }
}
