template< typename Service> Service & use_service( io_service & ios);
This function is used to locate a service object that corresponds to the
given service type. If there is no existing implementation of the service,
then the io_service
will create a new instance of the service.
The io_service
object that owns the service.
The service interface implementing the specified service type. Ownership of the service interface is not transferred to the caller.
Header: asio/io_service.hpp
Convenience header: asio.hpp