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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_dc1ak7d9kv06p3pifb37hju05v, O_RDWR) failed: No space left on device (28) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
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<b>Warning</b>:  session_start(): Failed to read session data: files (path: /var/lib/php/sessions) in <b>/var/www/tb-usercake/models/config.php</b> on line <b>51</b><br />
static class Q implements AutoCloseable {
  S name = "Unnamed Queue";
  L<Runnable> q = synchroLinkedList();
  new SingleThread st;
  BlockingQueue<Runnable> q = new LinkedBlockingQueue;
  volatile bool retired;
  
  *() {}
  *(S *name) {}
  
  void add(Runnable r) {
    q.add(r);
    st.go(r { _run() });
  }
  
  void add(O r) {
    add(toRunnable(r));
  }
  
  void _run() {
    L<Runnable> l = cloneAndClearList(q);
    for (Runnable r : l) {
      if (!licensed() || retired) ret;
      pcall { r.run(); }
    }
  }
  
  // end after current items have been processed
  void done() {
    add(r { throw new Done; });
  }
  
  public void close() { retired = true; } // TODO: interrupt thread
  
  bool isEmpty() { ret q.isEmpty(); }
}