Method submit

future-java/src/main/java/io/trane/future/Tailrec.java:77–85

(final Runnable r, final int batchSize)

  }

  private final void submit(final Runnable r, final int batchSize) {
    syncPermits = batchSize;
    tasks = new ArrayList<>(1);
    tasks.add(r);
    if (!running) {
      run();
      syncPermits = 0;
    }
  }

  private final void run() {
    running = true;