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The core random number generators

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package prng.collector;

import prng.config.Config;

/**
 * Use the amount of time between calls as a source of entropy
 *
 * @author Simon Greatrix
 */
public class SchedulingEntropy extends EntropyCollector {

  /** Last time this was called */
  private long lastTime = System.nanoTime();


  /**
   * Create a collector that uses scheduling accuracy to produce entropy
   *
   * @param config configuration for this
   */
  public SchedulingEntropy(Config config) {
    super(config, 50);
  }


  @Override
  protected boolean initialise() {
    return true;
  }


  @Override
  protected void runImpl() {
    long now = System.nanoTime();
    long diff = now - lastTime;
    lastTime = now;
    setEvent((short) diff);
  }
}