| [/ |
| / Copyright (c) 2003-2021 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| / |
| / Distributed under the Boost Software License, Version 1.0. (See accompanying |
| / file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
| /] |
| |
| [section:ShutdownHandler SSL shutdown handler requirements] |
| |
| A shutdown handler must meet the requirements for a [link |
| asio.reference.Handler 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`. |
| |
| [heading Examples] |
| |
| A free function as a shutdown handler: |
| |
| void shutdown_handler( |
| const asio::error_code& ec) |
| { |
| ... |
| } |
| |
| A shutdown handler function object: |
| |
| struct shutdown_handler |
| { |
| ... |
| void operator()( |
| const asio::error_code& ec) |
| { |
| ... |
| } |
| ... |
| }; |
| |
| A lambda as a shutdown handler: |
| |
| ssl_stream.async_shutdown(..., |
| [](const asio::error_code& ec) |
| { |
| ... |
| }); |
| |
| A non-static class member function adapted to a shutdown handler using |
| `std::bind()`: |
| |
| void my_class::shutdown_handler( |
| const asio::error_code& ec) |
| { |
| ... |
| } |
| ... |
| ssl_stream.async_shutdown( |
| std::bind(&my_class::shutdown_handler, |
| this, std::placeholders::_1)); |
| |
| A non-static class member function adapted to a shutdown handler using |
| `boost::bind()`: |
| |
| void my_class::shutdown_handler( |
| const asio::error_code& ec) |
| { |
| ... |
| } |
| ... |
| ssl_stream.async_shutdown( |
| boost::bind(&my_class::shutdown_handler, |
| this, asio::placeholders::error)); |
| |
| [endsect] |