| [/ |
| / Copyright (c) 2003-2013 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:WaitHandler Wait handler requirements] |
| |
| A wait handler must meet the requirements for a [link |
| asio.reference.Handler handler]. A value `h` of a wait 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 wait handler: |
| |
| void wait_handler( |
| const asio::error_code& ec) |
| { |
| ... |
| } |
| |
| A wait handler function object: |
| |
| struct wait_handler |
| { |
| ... |
| void operator()( |
| const asio::error_code& ec) |
| { |
| ... |
| } |
| ... |
| }; |
| |
| A non-static class member function adapted to a wait handler using `bind()`: |
| |
| void my_class::wait_handler( |
| const asio::error_code& ec) |
| { |
| ... |
| } |
| ... |
| socket.async_wait(..., |
| boost::bind(&my_class::wait_handler, |
| this, asio::placeholders::error)); |
| |
| [endsect] |