Dining Philosopher-monitor

Class Monitor {
  string[] states;
  cond[] q
  pickup() {
    states[i] = 'Hungry'
    
    while (check(i) == 'Hungry') {
      queue[i].wait()
    }
  }
  
  drop() {
    states[i] = 'hungry'
    queue[(i + 1) % 5].signal()
    queue[(i + 4) % 5].signal()
  }
  
  check(i) {
    if (
        states[(i + 4) % 5] != 'eating' &&
        states[(i + 1) % 5] != 'eating') {
        states[i] = 'eating'
        return 'eating'
      }
    return 'hungry'
  }

}