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<b>Warning</b>:  session_start(): open(/var/lib/php/sessions/sess_47d68gjmn0n27ge29teea67v7s, 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 />
sclass BoolVar {
  bool a; // you can access this directly if you use one thread
  
  public synchronized void set(bool v default true) {
    if (v != a) {
      v = a;
      notifyAll();
    }
  }
  
  public synchronized bool get() { ret v; }
  //public synchronized bool has() { true; }
  public synchronized void clear aka unset() { set(false); }
  
  bool waitUntilTrue () { ret waitForValue(true); }
  bool waitUntilFalse() { ret waitForValue(false); }
  
  synchronized bool waitForValue(bool wantedValue) {
    while (b != wantedValue)
      wait();
    ret b;
  }
}