Construct a signal set and add three signals.
template< typename ExecutionContext> basic_signal_set( ExecutionContext & context, int signal_number_1, int signal_number_2, int signal_number_3, typename enable_if< is_convertible< ExecutionContext &, execution_context & >::value >::type * = 0);
This constructor creates a signal set and registers for three signals.
An execution context which provides the I/O executor that the signal set will use, by default, to dispatch handlers for any asynchronous operations performed on the signal set.
The first signal number to be added.
The second signal number to be added.
The third signal number to be added.
This constructor is equivalent to performing:
boost::asio::signal_set signals(context); signals.add(signal_number_1); signals.add(signal_number_2); signals.add(signal_number_3);