package scala.actors.threadpool;

/**
 * Compilation stub for pre-1.4.2 JREs. Thanks to it, the whole backport
 * package compiles and works with 1.4.2 as well as wih earlier JREs, and takes
 * advantage of native Perf class when running on 1.4.2 while seamlessly
 * falling back to System.currentTimeMillis() on previous JREs. This class
 * should NOT be included in the binary distribution of backport.
 *
 * @author Dawid Kurzyniec
 * @version 1.0
 */
public final class Perf {

    private static final Perf perf = new Perf();

    public static Perf getPerf() { return perf; }

    private Perf() {}

    public long highResCounter() {
        return System.currentTimeMillis();
    }

    public long highResFrequency() {
        return 1000L;
    }
}