<br />
<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_9t7d60vvvtvl9ht965sp19vq5u, 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 />
<br />
<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 ReliableSingleThread {
  O runnable;
  bool running, trigger;
  
  *(O *runnable) {}
  
  void trigger() { go(); }
  synchronized void go() {
    trigger = true;
    if (!running) {
      running = true;
      thread "Single Thread" { _run(); }
    }
  }
  
  synchronized bool running() { ret running; }
  
  // use only if this is the last time you trigger this
  void triggerAndWait() {
    trigger();
    while (running()) sleep(1);
  }
  
  void _run() {
    while licensed {
      synchronized(this) {
        if (!trigger) {
          running = false;
          break;
        }
        trigger = false;
      }
      pcallF(runnable);
    }
  }
}