projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| 92f5a8d4 TL |
1 | // |
| 2 | // co_spawn.hpp | |
| 3 | // ~~~~~~~~~~~~ | |
| 4 | // | |
| 5 | // Copyright (c) 2003-2019 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_CO_SPAWN_HPP | |
| 12 | #define BOOST_ASIO_CO_SPAWN_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 | ||
| 20 | #if defined(BOOST_ASIO_HAS_CO_AWAIT) || defined(GENERATING_DOCUMENTATION) | |
| 21 | ||
| 22 | #include <boost/asio/awaitable.hpp> | |
| 23 | #include <boost/asio/execution_context.hpp> | |
| 24 | #include <boost/asio/is_executor.hpp> | |
| 25 | ||
| 26 | #include <boost/asio/detail/push_options.hpp> | |
| 27 | ||
| 28 | namespace boost { | |
| 29 | namespace asio { | |
| 30 | namespace detail { | |
| 31 | ||
| 32 | template <typename T> | |
| 33 | struct awaitable_signature; | |
| 34 | ||
| 35 | template <typename T, typename Executor> | |
| 36 | struct awaitable_signature<awaitable<T, Executor>> | |
| 37 | { | |
| 38 | typedef void type(std::exception_ptr, T); | |
| 39 | }; | |
| 40 | ||
| 41 | template <typename Executor> | |
| 42 | struct awaitable_signature<awaitable<void, Executor>> | |
| 43 | { | |
| 44 | typedef void type(std::exception_ptr); | |
| 45 | }; | |
| 46 | ||
| 47 | } // namespace detail | |
| 48 | ||
| 49 | /// Spawn a new thread of execution. | |
| 50 | /** | |
| 51 | * The entry point function object @c f must have the signature: | |
| 52 | * | |
| 53 | * @code awaitable<void, E> f(); @endcode | |
| 54 | * | |
| 55 | * where @c E is convertible from @c Executor. | |
| 56 | */ | |
| 57 | template <typename Executor, typename F, | |
| 58 | BOOST_ASIO_COMPLETION_TOKEN_FOR(typename detail::awaitable_signature< | |
| 59 | typename result_of<F()>::type>::type) CompletionToken | |
| 60 | BOOST_ASIO_DEFAULT_COMPLETION_TOKEN_TYPE(Executor)> | |
| 61 | BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, | |
| 62 | typename detail::awaitable_signature<typename result_of<F()>::type>::type) | |
| 63 | co_spawn(const Executor& ex, F&& f, | |
| 64 | CompletionToken&& token | |
| 65 | BOOST_ASIO_DEFAULT_COMPLETION_TOKEN(Executor), | |
| 66 | typename enable_if< | |
| 67 | is_executor<Executor>::value | |
| 68 | >::type* = 0); | |
| 69 | ||
| 70 | /// Spawn a new thread of execution. | |
| 71 | /** | |
| 72 | * The entry point function object @c f must have the signature: | |
| 73 | * | |
| 74 | * @code awaitable<void, E> f(); @endcode | |
| 75 | * | |
| 76 | * where @c E is convertible from @c ExecutionContext::executor_type. | |
| 77 | */ | |
| 78 | template <typename ExecutionContext, typename F, | |
| 79 | BOOST_ASIO_COMPLETION_TOKEN_FOR(typename detail::awaitable_signature< | |
| 80 | typename result_of<F()>::type>::type) CompletionToken | |
| 81 | BOOST_ASIO_DEFAULT_COMPLETION_TOKEN_TYPE( | |
| 82 | typename ExecutionContext::executor_type)> | |
| 83 | BOOST_ASIO_INITFN_AUTO_RESULT_TYPE(CompletionToken, | |
| 84 | typename detail::awaitable_signature<typename result_of<F()>::type>::type) | |
| 85 | co_spawn(ExecutionContext& ctx, F&& f, | |
| 86 | CompletionToken&& token | |
| 87 | BOOST_ASIO_DEFAULT_COMPLETION_TOKEN( | |
| 88 | typename ExecutionContext::executor_type), | |
| 89 | typename enable_if< | |
| 90 | is_convertible<ExecutionContext&, execution_context&>::value | |
| 91 | >::type* = 0); | |
| 92 | ||
| 93 | } // namespace asio | |
| 94 | } // namespace boost | |
| 95 | ||
| 96 | #include <boost/asio/detail/pop_options.hpp> | |
| 97 | ||
| 98 | #include <boost/asio/impl/co_spawn.hpp> | |
| 99 | ||
| 100 | #endif // defined(BOOST_ASIO_HAS_CO_AWAIT) || defined(GENERATING_DOCUMENTATION) | |
| 101 | ||
| 102 | #endif // BOOST_ASIO_CO_SPAWN_HPP |