Boost Asio总结（13） 信号

Posted 2022-03-22 thefist11

1.1

eg.

typedef basic_signal_set signal_set;

void handler(
    const boost::system::error_code& error,
    int signal_number)

  if (!error)
  
    // A signal occurred.
  


...

// Construct a signal set registered for process termination.
boost::asio::signal_set signals(my_context, SIGINT, SIGTERM);

// Start an asynchronous wait for one of the signals to occur.
signals.async_wait(handler);

1.2

template <typename Executor = executor>
class basic_signal_set

  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");
  

  void remove(int signal_number)
  
    boost::system::error_code ec;
    impl_.get_service().remove(impl_.get_implementation(), signal_number, ec);
    boost::asio::detail::throw_error(ec, "remove");
  

  void clear()
  
    boost::system::error_code ec;
    impl_.get_service().clear(impl_.get_implementation(), ec);
    boost::asio::detail::throw_error(ec, "clear");
  

  void cancel()
  
    boost::system::error_code ec;
    impl_.get_service().cancel(impl_.get_implementation(), ec);
    boost::asio::detail::throw_error(ec, "cancel");
  

  template <typename SignalHandler>
  BOOST_ASIO_INITFN_RESULT_TYPE(SignalHandler,
      void (boost::system::error_code, int))
  async_wait(BOOST_ASIO_MOVE_ARG(SignalHandler) handler)
  
    return async_initiate<SignalHandler, void (boost::system::error_code, int)>(
        initiate_async_wait(), handler, this);
  

...