projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| b32b8144 FG |
1 | // |
| 2 | // detail/is_executor.hpp | |
| 3 | // ~~~~~~~~~~~~~~~~~~~~~~ | |
| 4 | // | |
| 92f5a8d4 | 5 | // Copyright (c) 2003-2019 Christopher M. Kohlhoff (chris at kohlhoff dot com) |
| b32b8144 FG |
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_IS_EXECUTOR_HPP | |
| 12 | #define BOOST_ASIO_DETAIL_IS_EXECUTOR_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/asio/detail/config.hpp> | |
| 19 | #include <boost/asio/detail/type_traits.hpp> | |
| 20 | ||
| 21 | #include <boost/asio/detail/push_options.hpp> | |
| 22 | ||
| 23 | namespace boost { | |
| 24 | namespace asio { | |
| 25 | namespace detail { | |
| 26 | ||
| 27 | struct executor_memfns_base | |
| 28 | { | |
| 29 | void context(); | |
| 30 | void on_work_started(); | |
| 31 | void on_work_finished(); | |
| 32 | void dispatch(); | |
| 33 | void post(); | |
| 34 | void defer(); | |
| 35 | }; | |
| 36 | ||
| 37 | template <typename T> | |
| 38 | struct executor_memfns_derived | |
| 39 | : T, executor_memfns_base | |
| 40 | { | |
| 41 | }; | |
| 42 | ||
| 43 | template <typename T, T> | |
| 44 | struct executor_memfns_check | |
| 45 | { | |
| 46 | }; | |
| 47 | ||
| 48 | template <typename> | |
| 49 | char (&context_memfn_helper(...))[2]; | |
| 50 | ||
| 51 | template <typename T> | |
| 52 | char context_memfn_helper( | |
| 53 | executor_memfns_check< | |
| 54 | void (executor_memfns_base::*)(), | |
| 55 | &executor_memfns_derived<T>::context>*); | |
| 56 | ||
| 57 | template <typename> | |
| 58 | char (&on_work_started_memfn_helper(...))[2]; | |
| 59 | ||
| 60 | template <typename T> | |
| 61 | char on_work_started_memfn_helper( | |
| 62 | executor_memfns_check< | |
| 63 | void (executor_memfns_base::*)(), | |
| 64 | &executor_memfns_derived<T>::on_work_started>*); | |
| 65 | ||
| 66 | template <typename> | |
| 67 | char (&on_work_finished_memfn_helper(...))[2]; | |
| 68 | ||
| 69 | template <typename T> | |
| 70 | char on_work_finished_memfn_helper( | |
| 71 | executor_memfns_check< | |
| 72 | void (executor_memfns_base::*)(), | |
| 73 | &executor_memfns_derived<T>::on_work_finished>*); | |
| 74 | ||
| 75 | template <typename> | |
| 76 | char (&dispatch_memfn_helper(...))[2]; | |
| 77 | ||
| 78 | template <typename T> | |
| 79 | char dispatch_memfn_helper( | |
| 80 | executor_memfns_check< | |
| 81 | void (executor_memfns_base::*)(), | |
| 82 | &executor_memfns_derived<T>::dispatch>*); | |
| 83 | ||
| 84 | template <typename> | |
| 85 | char (&post_memfn_helper(...))[2]; | |
| 86 | ||
| 87 | template <typename T> | |
| 88 | char post_memfn_helper( | |
| 89 | executor_memfns_check< | |
| 90 | void (executor_memfns_base::*)(), | |
| 91 | &executor_memfns_derived<T>::post>*); | |
| 92 | ||
| 93 | template <typename> | |
| 94 | char (&defer_memfn_helper(...))[2]; | |
| 95 | ||
| 96 | template <typename T> | |
| 97 | char defer_memfn_helper( | |
| 98 | executor_memfns_check< | |
| 99 | void (executor_memfns_base::*)(), | |
| 100 | &executor_memfns_derived<T>::defer>*); | |
| 101 | ||
| 102 | template <typename T> | |
| 103 | struct is_executor_class | |
| 104 | : integral_constant<bool, | |
| 105 | sizeof(context_memfn_helper<T>(0)) != 1 && | |
| 106 | sizeof(on_work_started_memfn_helper<T>(0)) != 1 && | |
| 107 | sizeof(on_work_finished_memfn_helper<T>(0)) != 1 && | |
| 108 | sizeof(dispatch_memfn_helper<T>(0)) != 1 && | |
| 109 | sizeof(post_memfn_helper<T>(0)) != 1 && | |
| 110 | sizeof(defer_memfn_helper<T>(0)) != 1> | |
| 111 | { | |
| 112 | }; | |
| 113 | ||
| 114 | template <typename T> | |
| 115 | struct is_executor | |
| 116 | : conditional<is_class<T>::value, | |
| 117 | is_executor_class<T>, | |
| 118 | false_type>::type | |
| 119 | { | |
| 120 | }; | |
| 121 | ||
| 122 | } // namespace detail | |
| 123 | } // namespace asio | |
| 124 | } // namespace boost | |
| 125 | ||
| 126 | #include <boost/asio/detail/pop_options.hpp> | |
| 127 | ||
| 128 | #endif // BOOST_ASIO_DETAIL_IS_EXECUTOR_HPP |