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1 | // | |
2 | // detail/task_io_service_operation.hpp | |
3 | // ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
4 | // | |
5 | // Copyright (c) 2003-2016 Christopher M. Kohlhoff (chris at kohlhoff dot com) | |
6 | // | |
7 | // Distributed under the Boost Software License, Version 1.0. (See accompanying | |
8 | // file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) | |
9 | // | |
10 | ||
11 | #ifndef BOOST_ASIO_DETAIL_TASK_IO_SERVICE_OPERATION_HPP | |
12 | #define BOOST_ASIO_DETAIL_TASK_IO_SERVICE_OPERATION_HPP | |
13 | ||
14 | #if defined(_MSC_VER) && (_MSC_VER >= 1200) | |
15 | # pragma once | |
16 | #endif // defined(_MSC_VER) && (_MSC_VER >= 1200) | |
17 | ||
18 | #include <boost/system/error_code.hpp> | |
19 | #include <boost/asio/detail/handler_tracking.hpp> | |
20 | #include <boost/asio/detail/op_queue.hpp> | |
21 | ||
22 | #include <boost/asio/detail/push_options.hpp> | |
23 | ||
24 | namespace boost { | |
25 | namespace asio { | |
26 | namespace detail { | |
27 | ||
28 | class task_io_service; | |
29 | ||
30 | // Base class for all operations. A function pointer is used instead of virtual | |
31 | // functions to avoid the associated overhead. | |
32 | class task_io_service_operation BOOST_ASIO_INHERIT_TRACKED_HANDLER | |
33 | { | |
34 | public: | |
35 | void complete(task_io_service& owner, | |
36 | const boost::system::error_code& ec, std::size_t bytes_transferred) | |
37 | { | |
38 | func_(&owner, this, ec, bytes_transferred); | |
39 | } | |
40 | ||
41 | void destroy() | |
42 | { | |
43 | func_(0, this, boost::system::error_code(), 0); | |
44 | } | |
45 | ||
46 | protected: | |
47 | typedef void (*func_type)(task_io_service*, | |
48 | task_io_service_operation*, | |
49 | const boost::system::error_code&, std::size_t); | |
50 | ||
51 | task_io_service_operation(func_type func) | |
52 | : next_(0), | |
53 | func_(func), | |
54 | task_result_(0) | |
55 | { | |
56 | } | |
57 | ||
58 | // Prevents deletion through this type. | |
59 | ~task_io_service_operation() | |
60 | { | |
61 | } | |
62 | ||
63 | private: | |
64 | friend class op_queue_access; | |
65 | task_io_service_operation* next_; | |
66 | func_type func_; | |
67 | protected: | |
68 | friend class task_io_service; | |
69 | unsigned int task_result_; // Passed into bytes transferred. | |
70 | }; | |
71 | ||
72 | } // namespace detail | |
73 | } // namespace asio | |
74 | } // namespace boost | |
75 | ||
76 | #include <boost/asio/detail/pop_options.hpp> | |
77 | ||
78 | #endif // BOOST_ASIO_DETAIL_TASK_IO_SERVICE_OPERATION_HPP |