|  | 
        The signal_set_base
        class is used as a base for the basic_signal_set class templates
        so that we have a common place to define the flags enum.
      
class signal_set_base
| Name | Description | 
|---|---|
| Enumeration representing the different types of flags that may specified when adding a signal to a set. | |
| Portability typedef. | 
| Name | Description | 
|---|---|
| ~signal_set_base [destructor] | Protected destructor to prevent deletion through this type. | 
        Header: asio/signal_set_base.hpp
      
        Convenience header: asio.hpp