Function add

include/boost/asio/basic_signal_set.hpp:353–358

Add a signal to a signal_set. * This function adds the specified signal to the set. It has no effect if the * signal is already in the set. * * @param signal_number The signal to be added to the set. * * @throws boost::system::system_error Thrown on failure. */

   * @throws boost::system::system_error Thrown on failure.
   */
  void add(int signal_number)
  {
    boost::system::error_code ec;
    impl_.get_service().add(impl_.get_implementation(), signal_number, ec);
    boost::asio::detail::throw_error(ec, "add");
  }

  /// Add a signal to a signal_set.
  /**