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1 | [/ |
2 | / Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com) | |
3 | / | |
4 | / Distributed under the Boost Software License, Version 1.0. (See accompanying | |
5 | / file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
6 | /] | |
7 | ||
8 | [section:BufferedHandshakeHandler Buffered handshake handler requirements] | |
9 | ||
10 | A buffered handshake handler must meet the requirements for a [link | |
11 | boost_asio.reference.Handler handler]. A value `h` of a buffered handshake handler | |
12 | class should work correctly in the expression `h(ec, s)`, where `ec` is an | |
13 | lvalue of type `const error_code` and `s` is an lvalue of type `const size_t`. | |
14 | ||
15 | [heading Examples] | |
16 | ||
17 | A free function as a buffered handshake handler: | |
18 | ||
19 | void handshake_handler( | |
20 | const boost::system::error_code& ec, | |
21 | std::size_t bytes_transferred) | |
22 | { | |
23 | ... | |
24 | } | |
25 | ||
26 | A buffered handshake handler function object: | |
27 | ||
28 | struct handshake_handler | |
29 | { | |
30 | ... | |
31 | void operator()( | |
32 | const boost::system::error_code& ec, | |
33 | std::size_t bytes_transferred) | |
34 | { | |
35 | ... | |
36 | } | |
37 | ... | |
38 | }; | |
39 | ||
40 | A non-static class member function adapted to a buffered handshake handler using `bind()`: | |
41 | ||
42 | void my_class::handshake_handler( | |
43 | const boost::system::error_code& ec, | |
44 | std::size_t bytes_transferred) | |
45 | { | |
46 | ... | |
47 | } | |
48 | ... | |
49 | socket.async_handshake(..., | |
50 | boost::bind(&my_class::handshake_handler, | |
51 | this, boost::asio::placeholders::error, | |
52 | boost::asio::placeholders::bytes_transferred)); | |
53 | ||
54 | [endsect] |