projects / ceph.git / blame
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1 | |
| 2 | // Copyright Oliver Kowalke 2013. | |
| 3 | // Distributed under the Boost Software License, Version 1.0. | |
| 4 | // (See accompanying file LICENSE_1_0.txt or copy at | |
| 5 | // http://www.boost.org/LICENSE_1_0.txt) | |
| 6 | ||
| 7 | #ifndef BOOST_FIBERS_ASYNC_HPP | |
| 8 | #define BOOST_FIBERS_ASYNC_HPP | |
| 9 | ||
| 10 | #include <algorithm> | |
| 11 | #include <memory> | |
| 12 | #include <type_traits> | |
| 13 | #include <utility> | |
| 14 | ||
| 15 | #include <boost/config.hpp> | |
| 16 | ||
| 17 | #include <boost/fiber/future/future.hpp> | |
| 18 | #include <boost/fiber/future/packaged_task.hpp> | |
| 19 | #include <boost/fiber/policy.hpp> | |
| 20 | ||
| 21 | namespace boost { | |
| 22 | namespace fibers { | |
| 23 | ||
| 20effc67 TL |
24 | #if defined(BOOST_MSVC) && (_MSC_VER >= 1911 && _MSVC_LANG >= 201703) |
| 25 | template <typename> | |
| 26 | struct result_of; | |
| 27 | template <typename F, typename... Args> | |
| 28 | struct result_of<F(Args...)> : std::invoke_result<F, Args...> {}; | |
| 29 | #else | |
| 30 | using std::result_of; | |
| 31 | #endif | |
| 32 | ||
| 33 | ||
| b32b8144 FG |
34 | template< typename Fn, typename ... Args > |
| 35 | future< | |
| 20effc67 | 36 | typename result_of< |
| b32b8144 FG |
37 | typename std::enable_if< |
| 38 | ! detail::is_launch_policy< typename std::decay< Fn >::type >::value, | |
| 39 | typename std::decay< Fn >::type | |
| 40 | >::type( typename std::decay< Args >::type ... ) | |
| 41 | >::type | |
| 42 | > | |
| 43 | async( Fn && fn, Args ... args) { | |
| 20effc67 | 44 | typedef typename result_of< |
| b32b8144 FG |
45 | typename std::decay< Fn >::type( typename std::decay< Args >::type ... ) |
| 46 | >::type result_type; | |
| 47 | ||
| 48 | packaged_task< result_type( typename std::decay< Args >::type ... ) > pt{ | |
| 49 | std::forward< Fn >( fn) }; | |
| 50 | future< result_type > f{ pt.get_future() }; | |
| 51 | fiber{ std::move( pt), std::forward< Args >( args) ... }.detach(); | |
| 52 | return f; | |
| 53 | } | |
| 54 | ||
| 55 | template< typename Policy, typename Fn, typename ... Args > | |
| 56 | future< | |
| 20effc67 | 57 | typename result_of< |
| b32b8144 FG |
58 | typename std::enable_if< |
| 59 | detail::is_launch_policy< Policy >::value, | |
| 60 | typename std::decay< Fn >::type | |
| 61 | >::type( typename std::decay< Args >::type ...) | |
| 62 | >::type | |
| 63 | > | |
| 64 | async( Policy policy, Fn && fn, Args ... args) { | |
| 20effc67 | 65 | typedef typename result_of< |
| b32b8144 FG |
66 | typename std::decay< Fn >::type( typename std::decay< Args >::type ... ) |
| 67 | >::type result_type; | |
| 68 | ||
| 69 | packaged_task< result_type( typename std::decay< Args >::type ... ) > pt{ | |
| 70 | std::forward< Fn >( fn) }; | |
| 71 | future< result_type > f{ pt.get_future() }; | |
| 72 | fiber{ policy, std::move( pt), std::forward< Args >( args) ... }.detach(); | |
| 73 | return f; | |
| 74 | } | |
| 75 | ||
| 76 | template< typename Policy, typename StackAllocator, typename Fn, typename ... Args > | |
| 77 | future< | |
| 20effc67 | 78 | typename result_of< |
| b32b8144 FG |
79 | typename std::enable_if< |
| 80 | detail::is_launch_policy< Policy >::value, | |
| 81 | typename std::decay< Fn >::type | |
| 82 | >::type( typename std::decay< Args >::type ... ) | |
| 83 | >::type | |
| 84 | > | |
| 85 | async( Policy policy, std::allocator_arg_t, StackAllocator salloc, Fn && fn, Args ... args) { | |
| 20effc67 | 86 | typedef typename result_of< |
| b32b8144 FG |
87 | typename std::decay< Fn >::type( typename std::decay< Args >::type ... ) |
| 88 | >::type result_type; | |
| 89 | ||
| 90 | packaged_task< result_type( typename std::decay< Args >::type ... ) > pt{ | |
| 91 | std::forward< Fn >( fn) }; | |
| 92 | future< result_type > f{ pt.get_future() }; | |
| 93 | fiber{ policy, std::allocator_arg, salloc, | |
| 94 | std::move( pt), std::forward< Args >( args) ... }.detach(); | |
| 95 | return f; | |
| 96 | } | |
| 97 | ||
| 98 | template< typename Policy, typename StackAllocator, typename Allocator, typename Fn, typename ... Args > | |
| 99 | future< | |
| 20effc67 | 100 | typename result_of< |
| b32b8144 FG |
101 | typename std::enable_if< |
| 102 | detail::is_launch_policy< Policy >::value, | |
| 103 | typename std::decay< Fn >::type | |
| 104 | >::type( typename std::decay< Args >::type ... ) | |
| 105 | >::type | |
| 106 | > | |
| 107 | async( Policy policy, std::allocator_arg_t, StackAllocator salloc, Allocator alloc, Fn && fn, Args ... args) { | |
| 20effc67 | 108 | typedef typename result_of< |
| b32b8144 FG |
109 | typename std::decay< Fn >::type( typename std::decay< Args >::type ... ) |
| 110 | >::type result_type; | |
| 111 | ||
| 112 | packaged_task< result_type( typename std::decay< Args >::type ... ) > pt{ | |
| 113 | std::allocator_arg, alloc, std::forward< Fn >( fn) }; | |
| 114 | future< result_type > f{ pt.get_future() }; | |
| 115 | fiber{ policy, std::allocator_arg, salloc, | |
| 116 | std::move( pt), std::forward< Args >( args) ... }.detach(); | |
| 117 | return f; | |
| 118 | } | |
| 119 | ||
| 120 | }} | |
| 121 | ||
| 122 | #endif // BOOST_FIBERS_ASYNC_HPP |