...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
A shutdown handler must meet the requirements for a handler.
A value h
of a shutdown handler
class should work correctly in the expression h(ec)
,
where ec
is an lvalue of
type const error_code
.
A free function as a shutdown handler:
void shutdown_handler( const boost::system::error_code& ec) { ... }
A shutdown handler function object:
struct shutdown_handler { ... void operator()( const boost::system::error_code& ec) { ... } ... };
A non-static class member function adapted to a shutdown handler using bind()
:
void my_class::shutdown_handler( const boost::system::error_code& ec) { ... } ... ssl_stream.async_shutdown( boost::bind(&my_class::shutdown_handler, this, boost::asio::placeholders::error));