Boost C++ Libraries

...one of the most highly regarded and expertly designed C++ library projects in the world. Herb Sutter and Andrei Alexandrescu, C++ Coding Standards

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SSL shutdown handler requirements

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.

Examples

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));

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