Queues.swift

public  struct Queues {
  static var GlobalMainQueue: dispatch_queue_t {
    return dispatch_get_main_queue()
  }
  
  static var GlobalUserInteractiveQueue: dispatch_queue_t {
    return dispatch_get_global_queue(QOS_CLASS_USER_INTERACTIVE, 0)
  }
  
  static var GlobalUserInitiatedQueue: dispatch_queue_t {
    return dispatch_get_global_queue(QOS_CLASS_USER_INITIATED, 0)
  }
  
  static var GlobalDefaultQueue: dispatch_queue_t {
    return dispatch_get_global_queue(QOS_CLASS_DEFAULT, 0)
  }
  
  static var GlobalUtilityQueue: dispatch_queue_t {
    return dispatch_get_global_queue(QOS_CLASS_UTILITY, 0)
  }
  
  static var GlobalBackgroundQueue: dispatch_queue_t {
    return dispatch_get_global_queue(QOS_CLASS_BACKGROUND, 0)
  }
}