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| 1 | 13 | up20180614 | // -*- C++ -*- |
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| 2 | //===--------------------------- future -----------------------------------===// |
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| 3 | // |
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| 4 | // The LLVM Compiler Infrastructure |
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| 5 | // |
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| 6 | // This file is dual licensed under the MIT and the University of Illinois Open |
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| 7 | // Source Licenses. See LICENSE.TXT for details. |
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| 8 | // |
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| 9 | //===----------------------------------------------------------------------===// |
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| 10 | |||
| 11 | #ifndef _LIBCPP_FUTURE |
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| 12 | #define _LIBCPP_FUTURE |
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| 13 | |||
| 14 | /* |
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| 15 | future synopsis |
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| 16 | |||
| 17 | namespace std |
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| 18 | {
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| 19 | |||
| 20 | enum class future_errc |
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| 21 | {
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| 22 | future_already_retrieved = 1, |
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| 23 | promise_already_satisfied, |
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| 24 | no_state, |
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| 25 | broken_promise |
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| 26 | }; |
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| 27 | |||
| 28 | enum class launch |
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| 29 | {
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| 30 | async = 1, |
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| 31 | deferred = 2, |
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| 32 | any = async | deferred |
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| 33 | }; |
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| 34 | |||
| 35 | enum class future_status |
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| 36 | {
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| 37 | ready, |
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| 38 | timeout, |
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| 39 | deferred |
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| 40 | }; |
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| 41 | |||
| 42 | template <> struct is_error_code_enum<future_errc> : public true_type { };
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| 43 | error_code make_error_code(future_errc e) noexcept; |
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| 44 | error_condition make_error_condition(future_errc e) noexcept; |
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| 45 | |||
| 46 | const error_category& future_category() noexcept; |
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| 47 | |||
| 48 | class future_error |
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| 49 | : public logic_error |
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| 50 | {
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| 51 | public: |
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| 52 | future_error(error_code ec); // exposition only |
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| 53 | |||
| 54 | const error_code& code() const noexcept; |
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| 55 | const char* what() const noexcept; |
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| 56 | }; |
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| 57 | |||
| 58 | template <class R> |
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| 59 | class promise |
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| 60 | {
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| 61 | public: |
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| 62 | promise(); |
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| 63 | template <class Allocator> |
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| 64 | promise(allocator_arg_t, const Allocator& a); |
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| 65 | promise(promise&& rhs) noexcept; |
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| 66 | promise(const promise& rhs) = delete; |
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| 67 | ~promise(); |
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| 68 | |||
| 69 | // assignment |
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| 70 | promise& operator=(promise&& rhs) noexcept; |
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| 71 | promise& operator=(const promise& rhs) = delete; |
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| 72 | void swap(promise& other) noexcept; |
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| 73 | |||
| 74 | // retrieving the result |
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| 75 | future<R> get_future(); |
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| 76 | |||
| 77 | // setting the result |
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| 78 | void set_value(const R& r); |
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| 79 | void set_value(R&& r); |
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| 80 | void set_exception(exception_ptr p); |
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| 81 | |||
| 82 | // setting the result with deferred notification |
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| 83 | void set_value_at_thread_exit(const R& r); |
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| 84 | void set_value_at_thread_exit(R&& r); |
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| 85 | void set_exception_at_thread_exit(exception_ptr p); |
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| 86 | }; |
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| 87 | |||
| 88 | template <class R> |
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| 89 | class promise<R&> |
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| 90 | {
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| 91 | public: |
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| 92 | promise(); |
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| 93 | template <class Allocator> |
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| 94 | promise(allocator_arg_t, const Allocator& a); |
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| 95 | promise(promise&& rhs) noexcept; |
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| 96 | promise(const promise& rhs) = delete; |
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| 97 | ~promise(); |
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| 98 | |||
| 99 | // assignment |
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| 100 | promise& operator=(promise&& rhs) noexcept; |
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| 101 | promise& operator=(const promise& rhs) = delete; |
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| 102 | void swap(promise& other) noexcept; |
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| 103 | |||
| 104 | // retrieving the result |
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| 105 | future<R&> get_future(); |
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| 106 | |||
| 107 | // setting the result |
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| 108 | void set_value(R& r); |
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| 109 | void set_exception(exception_ptr p); |
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| 110 | |||
| 111 | // setting the result with deferred notification |
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| 112 | void set_value_at_thread_exit(R&); |
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| 113 | void set_exception_at_thread_exit(exception_ptr p); |
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| 114 | }; |
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| 115 | |||
| 116 | template <> |
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| 117 | class promise<void> |
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| 118 | {
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| 119 | public: |
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| 120 | promise(); |
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| 121 | template <class Allocator> |
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| 122 | promise(allocator_arg_t, const Allocator& a); |
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| 123 | promise(promise&& rhs) noexcept; |
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| 124 | promise(const promise& rhs) = delete; |
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| 125 | ~promise(); |
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| 126 | |||
| 127 | // assignment |
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| 128 | promise& operator=(promise&& rhs) noexcept; |
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| 129 | promise& operator=(const promise& rhs) = delete; |
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| 130 | void swap(promise& other) noexcept; |
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| 131 | |||
| 132 | // retrieving the result |
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| 133 | future<void> get_future(); |
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| 134 | |||
| 135 | // setting the result |
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| 136 | void set_value(); |
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| 137 | void set_exception(exception_ptr p); |
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| 138 | |||
| 139 | // setting the result with deferred notification |
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| 140 | void set_value_at_thread_exit(); |
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| 141 | void set_exception_at_thread_exit(exception_ptr p); |
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| 142 | }; |
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| 143 | |||
| 144 | template <class R> void swap(promise<R>& x, promise<R>& y) noexcept; |
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| 145 | |||
| 146 | template <class R, class Alloc> |
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| 147 | struct uses_allocator<promise<R>, Alloc> : public true_type {};
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| 148 | |||
| 149 | template <class R> |
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| 150 | class future |
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| 151 | {
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| 152 | public: |
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| 153 | future() noexcept; |
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| 154 | future(future&&) noexcept; |
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| 155 | future(const future& rhs) = delete; |
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| 156 | ~future(); |
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| 157 | future& operator=(const future& rhs) = delete; |
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| 158 | future& operator=(future&&) noexcept; |
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| 159 | shared_future<R> share(); |
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| 160 | |||
| 161 | // retrieving the value |
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| 162 | R get(); |
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| 163 | |||
| 164 | // functions to check state |
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| 165 | bool valid() const noexcept; |
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| 166 | |||
| 167 | void wait() const; |
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| 168 | template <class Rep, class Period> |
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| 169 | future_status |
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| 170 | wait_for(const chrono::duration<Rep, Period>& rel_time) const; |
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| 171 | template <class Clock, class Duration> |
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| 172 | future_status |
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| 173 | wait_until(const chrono::time_point<Clock, Duration>& abs_time) const; |
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| 174 | }; |
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| 175 | |||
| 176 | template <class R> |
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| 177 | class future<R&> |
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| 178 | {
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| 179 | public: |
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| 180 | future() noexcept; |
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| 181 | future(future&&) noexcept; |
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| 182 | future(const future& rhs) = delete; |
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| 183 | ~future(); |
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| 184 | future& operator=(const future& rhs) = delete; |
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| 185 | future& operator=(future&&) noexcept; |
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| 186 | shared_future<R&> share(); |
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| 187 | |||
| 188 | // retrieving the value |
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| 189 | R& get(); |
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| 190 | |||
| 191 | // functions to check state |
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| 192 | bool valid() const noexcept; |
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| 193 | |||
| 194 | void wait() const; |
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| 195 | template <class Rep, class Period> |
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| 196 | future_status |
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| 197 | wait_for(const chrono::duration<Rep, Period>& rel_time) const; |
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| 198 | template <class Clock, class Duration> |
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| 199 | future_status |
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| 200 | wait_until(const chrono::time_point<Clock, Duration>& abs_time) const; |
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| 201 | }; |
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| 202 | |||
| 203 | template <> |
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| 204 | class future<void> |
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| 205 | {
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| 206 | public: |
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| 207 | future() noexcept; |
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| 208 | future(future&&) noexcept; |
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| 209 | future(const future& rhs) = delete; |
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| 210 | ~future(); |
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| 211 | future& operator=(const future& rhs) = delete; |
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| 212 | future& operator=(future&&) noexcept; |
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| 213 | shared_future<void> share(); |
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| 214 | |||
| 215 | // retrieving the value |
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| 216 | void get(); |
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| 217 | |||
| 218 | // functions to check state |
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| 219 | bool valid() const noexcept; |
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| 220 | |||
| 221 | void wait() const; |
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| 222 | template <class Rep, class Period> |
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| 223 | future_status |
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| 224 | wait_for(const chrono::duration<Rep, Period>& rel_time) const; |
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| 225 | template <class Clock, class Duration> |
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| 226 | future_status |
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| 227 | wait_until(const chrono::time_point<Clock, Duration>& abs_time) const; |
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| 228 | }; |
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| 229 | |||
| 230 | template <class R> |
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| 231 | class shared_future |
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| 232 | {
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| 233 | public: |
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| 234 | shared_future() noexcept; |
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| 235 | shared_future(const shared_future& rhs); |
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| 236 | shared_future(future<R>&&) noexcept; |
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| 237 | shared_future(shared_future&& rhs) noexcept; |
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| 238 | ~shared_future(); |
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| 239 | shared_future& operator=(const shared_future& rhs); |
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| 240 | shared_future& operator=(shared_future&& rhs) noexcept; |
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| 241 | |||
| 242 | // retrieving the value |
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| 243 | const R& get() const; |
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| 244 | |||
| 245 | // functions to check state |
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| 246 | bool valid() const noexcept; |
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| 247 | |||
| 248 | void wait() const; |
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| 249 | template <class Rep, class Period> |
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| 250 | future_status |
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| 251 | wait_for(const chrono::duration<Rep, Period>& rel_time) const; |
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| 252 | template <class Clock, class Duration> |
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| 253 | future_status |
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| 254 | wait_until(const chrono::time_point<Clock, Duration>& abs_time) const; |
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| 255 | }; |
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| 256 | |||
| 257 | template <class R> |
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| 258 | class shared_future<R&> |
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| 259 | {
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| 260 | public: |
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| 261 | shared_future() noexcept; |
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| 262 | shared_future(const shared_future& rhs); |
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| 263 | shared_future(future<R&>&&) noexcept; |
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| 264 | shared_future(shared_future&& rhs) noexcept; |
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| 265 | ~shared_future(); |
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| 266 | shared_future& operator=(const shared_future& rhs); |
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| 267 | shared_future& operator=(shared_future&& rhs) noexcept; |
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| 268 | |||
| 269 | // retrieving the value |
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| 270 | R& get() const; |
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| 271 | |||
| 272 | // functions to check state |
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| 273 | bool valid() const noexcept; |
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| 274 | |||
| 275 | void wait() const; |
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| 276 | template <class Rep, class Period> |
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| 277 | future_status |
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| 278 | wait_for(const chrono::duration<Rep, Period>& rel_time) const; |
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| 279 | template <class Clock, class Duration> |
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| 280 | future_status |
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| 281 | wait_until(const chrono::time_point<Clock, Duration>& abs_time) const; |
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| 282 | }; |
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| 283 | |||
| 284 | template <> |
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| 285 | class shared_future<void> |
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| 286 | {
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| 287 | public: |
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| 288 | shared_future() noexcept; |
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| 289 | shared_future(const shared_future& rhs); |
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| 290 | shared_future(future<void>&&) noexcept; |
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| 291 | shared_future(shared_future&& rhs) noexcept; |
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| 292 | ~shared_future(); |
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| 293 | shared_future& operator=(const shared_future& rhs); |
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| 294 | shared_future& operator=(shared_future&& rhs) noexcept; |
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| 295 | |||
| 296 | // retrieving the value |
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| 297 | void get() const; |
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| 298 | |||
| 299 | // functions to check state |
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| 300 | bool valid() const noexcept; |
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| 301 | |||
| 302 | void wait() const; |
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| 303 | template <class Rep, class Period> |
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| 304 | future_status |
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| 305 | wait_for(const chrono::duration<Rep, Period>& rel_time) const; |
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| 306 | template <class Clock, class Duration> |
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| 307 | future_status |
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| 308 | wait_until(const chrono::time_point<Clock, Duration>& abs_time) const; |
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| 309 | }; |
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| 310 | |||
| 311 | template <class F, class... Args> |
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| 312 | future<typename result_of<typename decay<F>::type(typename decay<Args>::type...)>::type> |
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| 313 | async(F&& f, Args&&... args); |
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| 314 | |||
| 315 | template <class F, class... Args> |
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| 316 | future<typename result_of<typename decay<F>::type(typename decay<Args>::type...)>::type> |
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| 317 | async(launch policy, F&& f, Args&&... args); |
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| 318 | |||
| 319 | template <class> class packaged_task; // undefined |
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| 320 | |||
| 321 | template <class R, class... ArgTypes> |
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| 322 | class packaged_task<R(ArgTypes...)> |
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| 323 | {
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| 324 | public: |
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| 325 | typedef R result_type; |
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| 326 | |||
| 327 | // construction and destruction |
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| 328 | packaged_task() noexcept; |
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| 329 | template <class F> |
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| 330 | explicit packaged_task(F&& f); |
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| 331 | template <class F, class Allocator> |
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| 332 | packaged_task(allocator_arg_t, const Allocator& a, F&& f); |
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| 333 | ~packaged_task(); |
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| 334 | |||
| 335 | // no copy |
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| 336 | packaged_task(const packaged_task&) = delete; |
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| 337 | packaged_task& operator=(const packaged_task&) = delete; |
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| 338 | |||
| 339 | // move support |
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| 340 | packaged_task(packaged_task&& other) noexcept; |
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| 341 | packaged_task& operator=(packaged_task&& other) noexcept; |
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| 342 | void swap(packaged_task& other) noexcept; |
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| 343 | |||
| 344 | bool valid() const noexcept; |
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| 345 | |||
| 346 | // result retrieval |
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| 347 | future<R> get_future(); |
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| 348 | |||
| 349 | // execution |
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| 350 | void operator()(ArgTypes... ); |
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| 351 | void make_ready_at_thread_exit(ArgTypes...); |
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| 352 | |||
| 353 | void reset(); |
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| 354 | }; |
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| 355 | |||
| 356 | template <class R> |
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| 357 | void swap(packaged_task<R(ArgTypes...)&, packaged_task<R(ArgTypes...)>&) noexcept; |
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| 358 | |||
| 359 | template <class R, class Alloc> struct uses_allocator<packaged_task<R>, Alloc>; |
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| 360 | |||
| 361 | } // std |
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| 362 | |||
| 363 | */ |
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| 364 | |||
| 365 | #include <__config> |
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| 366 | #include <system_error> |
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| 367 | #include <memory> |
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| 368 | #include <chrono> |
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| 369 | #include <exception> |
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| 370 | #include <mutex> |
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| 371 | #include <thread> |
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| 372 | |||
| 373 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
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| 374 | #pragma GCC system_header |
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| 375 | #endif |
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| 376 | |||
| 377 | #ifdef _LIBCPP_HAS_NO_THREADS |
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| 378 | #error <future> is not supported on this single threaded system |
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| 379 | #else // !_LIBCPP_HAS_NO_THREADS |
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| 380 | |||
| 381 | _LIBCPP_BEGIN_NAMESPACE_STD |
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| 382 | |||
| 383 | //enum class future_errc |
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| 384 | _LIBCPP_DECLARE_STRONG_ENUM(future_errc) |
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| 385 | {
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| 386 | future_already_retrieved = 1, |
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| 387 | promise_already_satisfied, |
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| 388 | no_state, |
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| 389 | broken_promise |
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| 390 | }; |
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| 391 | _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(future_errc) |
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| 392 | |||
| 393 | template <> |
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| 394 | struct _LIBCPP_TYPE_VIS_ONLY is_error_code_enum<future_errc> : public true_type {};
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| 395 | |||
| 396 | #ifdef _LIBCPP_HAS_NO_STRONG_ENUMS |
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| 397 | template <> |
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| 398 | struct _LIBCPP_TYPE_VIS_ONLY is_error_code_enum<future_errc::__lx> : public true_type { };
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| 399 | #endif |
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| 400 | |||
| 401 | //enum class launch |
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| 402 | _LIBCPP_DECLARE_STRONG_ENUM(launch) |
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| 403 | {
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| 404 | async = 1, |
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| 405 | deferred = 2, |
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| 406 | any = async | deferred |
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| 407 | }; |
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| 408 | _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(launch) |
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| 409 | |||
| 410 | #ifndef _LIBCPP_HAS_NO_STRONG_ENUMS |
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| 411 | |||
| 412 | #ifdef _LIBCXX_UNDERLYING_TYPE |
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| 413 | typedef underlying_type<launch>::type __launch_underlying_type; |
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| 414 | #else |
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| 415 | typedef int __launch_underlying_type; |
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| 416 | #endif |
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| 417 | |||
| 418 | inline _LIBCPP_INLINE_VISIBILITY |
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| 419 | _LIBCPP_CONSTEXPR |
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| 420 | launch |
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| 421 | operator&(launch __x, launch __y) |
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| 422 | {
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| 423 | return static_cast<launch>(static_cast<__launch_underlying_type>(__x) & |
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| 424 | static_cast<__launch_underlying_type>(__y)); |
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| 425 | } |
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| 426 | |||
| 427 | inline _LIBCPP_INLINE_VISIBILITY |
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| 428 | _LIBCPP_CONSTEXPR |
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| 429 | launch |
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| 430 | operator|(launch __x, launch __y) |
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| 431 | {
|
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| 432 | return static_cast<launch>(static_cast<__launch_underlying_type>(__x) | |
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| 433 | static_cast<__launch_underlying_type>(__y)); |
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| 434 | } |
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| 435 | |||
| 436 | inline _LIBCPP_INLINE_VISIBILITY |
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| 437 | _LIBCPP_CONSTEXPR |
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| 438 | launch |
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| 439 | operator^(launch __x, launch __y) |
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| 440 | {
|
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| 441 | return static_cast<launch>(static_cast<__launch_underlying_type>(__x) ^ |
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| 442 | static_cast<__launch_underlying_type>(__y)); |
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| 443 | } |
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| 444 | |||
| 445 | inline _LIBCPP_INLINE_VISIBILITY |
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| 446 | _LIBCPP_CONSTEXPR |
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| 447 | launch |
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| 448 | operator~(launch __x) |
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| 449 | {
|
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| 450 | return static_cast<launch>(~static_cast<__launch_underlying_type>(__x) & 3); |
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| 451 | } |
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| 452 | |||
| 453 | inline _LIBCPP_INLINE_VISIBILITY |
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| 454 | launch& |
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| 455 | operator&=(launch& __x, launch __y) |
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| 456 | {
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| 457 | __x = __x & __y; return __x; |
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| 458 | } |
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| 459 | |||
| 460 | inline _LIBCPP_INLINE_VISIBILITY |
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| 461 | launch& |
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| 462 | operator|=(launch& __x, launch __y) |
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| 463 | {
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| 464 | __x = __x | __y; return __x; |
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| 465 | } |
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| 466 | |||
| 467 | inline _LIBCPP_INLINE_VISIBILITY |
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| 468 | launch& |
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| 469 | operator^=(launch& __x, launch __y) |
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| 470 | {
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| 471 | __x = __x ^ __y; return __x; |
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| 472 | } |
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| 473 | |||
| 474 | #endif // !_LIBCPP_HAS_NO_STRONG_ENUMS |
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| 475 | |||
| 476 | //enum class future_status |
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| 477 | _LIBCPP_DECLARE_STRONG_ENUM(future_status) |
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| 478 | {
|
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| 479 | ready, |
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| 480 | timeout, |
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| 481 | deferred |
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| 482 | }; |
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| 483 | _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(future_status) |
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| 484 | |||
| 485 | _LIBCPP_FUNC_VIS |
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| 486 | const error_category& future_category() _NOEXCEPT; |
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| 487 | |||
| 488 | inline _LIBCPP_INLINE_VISIBILITY |
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| 489 | error_code |
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| 490 | make_error_code(future_errc __e) _NOEXCEPT |
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| 491 | {
|
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| 492 | return error_code(static_cast<int>(__e), future_category()); |
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| 493 | } |
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| 494 | |||
| 495 | inline _LIBCPP_INLINE_VISIBILITY |
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| 496 | error_condition |
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| 497 | make_error_condition(future_errc __e) _NOEXCEPT |
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| 498 | {
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| 499 | return error_condition(static_cast<int>(__e), future_category()); |
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| 500 | } |
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| 501 | |||
| 502 | class _LIBCPP_EXCEPTION_ABI future_error |
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| 503 | : public logic_error |
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| 504 | {
|
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| 505 | error_code __ec_; |
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| 506 | public: |
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| 507 | future_error(error_code __ec); |
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| 508 | |||
| 509 | _LIBCPP_INLINE_VISIBILITY |
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| 510 | const error_code& code() const _NOEXCEPT {return __ec_;}
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| 511 | |||
| 512 | virtual ~future_error() _NOEXCEPT; |
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| 513 | }; |
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| 514 | |||
| 515 | class _LIBCPP_TYPE_VIS __assoc_sub_state |
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| 516 | : public __shared_count |
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| 517 | {
|
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| 518 | protected: |
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| 519 | exception_ptr __exception_; |
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| 520 | mutable mutex __mut_; |
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| 521 | mutable condition_variable __cv_; |
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| 522 | unsigned __state_; |
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| 523 | |||
| 524 | virtual void __on_zero_shared() _NOEXCEPT; |
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| 525 | void __sub_wait(unique_lock<mutex>& __lk); |
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| 526 | public: |
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| 527 | enum |
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| 528 | {
|
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| 529 | __constructed = 1, |
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| 530 | __future_attached = 2, |
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| 531 | ready = 4, |
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| 532 | deferred = 8 |
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| 533 | }; |
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| 534 | |||
| 535 | _LIBCPP_INLINE_VISIBILITY |
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| 536 | __assoc_sub_state() : __state_(0) {}
|
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| 537 | |||
| 538 | _LIBCPP_INLINE_VISIBILITY |
||
| 539 | bool __has_value() const |
||
| 540 | {return (__state_ & __constructed) || (__exception_ != nullptr);}
|
||
| 541 | |||
| 542 | _LIBCPP_INLINE_VISIBILITY |
||
| 543 | void __set_future_attached() |
||
| 544 | {
|
||
| 545 | lock_guard<mutex> __lk(__mut_); |
||
| 546 | __state_ |= __future_attached; |
||
| 547 | } |
||
| 548 | _LIBCPP_INLINE_VISIBILITY |
||
| 549 | bool __has_future_attached() const {return (__state_ & __future_attached) != 0;}
|
||
| 550 | |||
| 551 | _LIBCPP_INLINE_VISIBILITY |
||
| 552 | void __set_deferred() {__state_ |= deferred;}
|
||
| 553 | |||
| 554 | void __make_ready(); |
||
| 555 | _LIBCPP_INLINE_VISIBILITY |
||
| 556 | bool __is_ready() const {return (__state_ & ready) != 0;}
|
||
| 557 | |||
| 558 | void set_value(); |
||
| 559 | void set_value_at_thread_exit(); |
||
| 560 | |||
| 561 | void set_exception(exception_ptr __p); |
||
| 562 | void set_exception_at_thread_exit(exception_ptr __p); |
||
| 563 | |||
| 564 | void copy(); |
||
| 565 | |||
| 566 | void wait(); |
||
| 567 | template <class _Rep, class _Period> |
||
| 568 | future_status |
||
| 569 | wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const; |
||
| 570 | template <class _Clock, class _Duration> |
||
| 571 | future_status |
||
| 572 | wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const; |
||
| 573 | |||
| 574 | virtual void __execute(); |
||
| 575 | }; |
||
| 576 | |||
| 577 | template <class _Clock, class _Duration> |
||
| 578 | future_status |
||
| 579 | __assoc_sub_state::wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const |
||
| 580 | {
|
||
| 581 | unique_lock<mutex> __lk(__mut_); |
||
| 582 | if (__state_ & deferred) |
||
| 583 | return future_status::deferred; |
||
| 584 | while (!(__state_ & ready) && _Clock::now() < __abs_time) |
||
| 585 | __cv_.wait_until(__lk, __abs_time); |
||
| 586 | if (__state_ & ready) |
||
| 587 | return future_status::ready; |
||
| 588 | return future_status::timeout; |
||
| 589 | } |
||
| 590 | |||
| 591 | template <class _Rep, class _Period> |
||
| 592 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 593 | future_status |
||
| 594 | __assoc_sub_state::wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const |
||
| 595 | {
|
||
| 596 | return wait_until(chrono::steady_clock::now() + __rel_time); |
||
| 597 | } |
||
| 598 | |||
| 599 | template <class _Rp> |
||
| 600 | class __assoc_state |
||
| 601 | : public __assoc_sub_state |
||
| 602 | {
|
||
| 603 | typedef __assoc_sub_state base; |
||
| 604 | typedef typename aligned_storage<sizeof(_Rp), alignment_of<_Rp>::value>::type _Up; |
||
| 605 | protected: |
||
| 606 | _Up __value_; |
||
| 607 | |||
| 608 | virtual void __on_zero_shared() _NOEXCEPT; |
||
| 609 | public: |
||
| 610 | |||
| 611 | template <class _Arg> |
||
| 612 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 613 | void set_value(_Arg&& __arg); |
||
| 614 | #else |
||
| 615 | void set_value(_Arg& __arg); |
||
| 616 | #endif |
||
| 617 | |||
| 618 | template <class _Arg> |
||
| 619 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 620 | void set_value_at_thread_exit(_Arg&& __arg); |
||
| 621 | #else |
||
| 622 | void set_value_at_thread_exit(_Arg& __arg); |
||
| 623 | #endif |
||
| 624 | |||
| 625 | _Rp move(); |
||
| 626 | typename add_lvalue_reference<_Rp>::type copy(); |
||
| 627 | }; |
||
| 628 | |||
| 629 | template <class _Rp> |
||
| 630 | void |
||
| 631 | __assoc_state<_Rp>::__on_zero_shared() _NOEXCEPT |
||
| 632 | {
|
||
| 633 | if (this->__state_ & base::__constructed) |
||
| 634 | reinterpret_cast<_Rp*>(&__value_)->~_Rp(); |
||
| 635 | delete this; |
||
| 636 | } |
||
| 637 | |||
| 638 | template <class _Rp> |
||
| 639 | template <class _Arg> |
||
| 640 | void |
||
| 641 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 642 | __assoc_state<_Rp>::set_value(_Arg&& __arg) |
||
| 643 | #else |
||
| 644 | __assoc_state<_Rp>::set_value(_Arg& __arg) |
||
| 645 | #endif |
||
| 646 | {
|
||
| 647 | unique_lock<mutex> __lk(this->__mut_); |
||
| 648 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 649 | if (this->__has_value()) |
||
| 650 | throw future_error(make_error_code(future_errc::promise_already_satisfied)); |
||
| 651 | #endif |
||
| 652 | ::new(&__value_) _Rp(_VSTD::forward<_Arg>(__arg)); |
||
| 653 | this->__state_ |= base::__constructed | base::ready; |
||
| 654 | __cv_.notify_all(); |
||
| 655 | } |
||
| 656 | |||
| 657 | template <class _Rp> |
||
| 658 | template <class _Arg> |
||
| 659 | void |
||
| 660 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 661 | __assoc_state<_Rp>::set_value_at_thread_exit(_Arg&& __arg) |
||
| 662 | #else |
||
| 663 | __assoc_state<_Rp>::set_value_at_thread_exit(_Arg& __arg) |
||
| 664 | #endif |
||
| 665 | {
|
||
| 666 | unique_lock<mutex> __lk(this->__mut_); |
||
| 667 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 668 | if (this->__has_value()) |
||
| 669 | throw future_error(make_error_code(future_errc::promise_already_satisfied)); |
||
| 670 | #endif |
||
| 671 | ::new(&__value_) _Rp(_VSTD::forward<_Arg>(__arg)); |
||
| 672 | this->__state_ |= base::__constructed; |
||
| 673 | __thread_local_data()->__make_ready_at_thread_exit(this); |
||
| 674 | } |
||
| 675 | |||
| 676 | template <class _Rp> |
||
| 677 | _Rp |
||
| 678 | __assoc_state<_Rp>::move() |
||
| 679 | {
|
||
| 680 | unique_lock<mutex> __lk(this->__mut_); |
||
| 681 | this->__sub_wait(__lk); |
||
| 682 | if (this->__exception_ != nullptr) |
||
| 683 | rethrow_exception(this->__exception_); |
||
| 684 | return _VSTD::move(*reinterpret_cast<_Rp*>(&__value_)); |
||
| 685 | } |
||
| 686 | |||
| 687 | template <class _Rp> |
||
| 688 | typename add_lvalue_reference<_Rp>::type |
||
| 689 | __assoc_state<_Rp>::copy() |
||
| 690 | {
|
||
| 691 | unique_lock<mutex> __lk(this->__mut_); |
||
| 692 | this->__sub_wait(__lk); |
||
| 693 | if (this->__exception_ != nullptr) |
||
| 694 | rethrow_exception(this->__exception_); |
||
| 695 | return *reinterpret_cast<_Rp*>(&__value_); |
||
| 696 | } |
||
| 697 | |||
| 698 | template <class _Rp> |
||
| 699 | class __assoc_state<_Rp&> |
||
| 700 | : public __assoc_sub_state |
||
| 701 | {
|
||
| 702 | typedef __assoc_sub_state base; |
||
| 703 | typedef _Rp* _Up; |
||
| 704 | protected: |
||
| 705 | _Up __value_; |
||
| 706 | |||
| 707 | virtual void __on_zero_shared() _NOEXCEPT; |
||
| 708 | public: |
||
| 709 | |||
| 710 | void set_value(_Rp& __arg); |
||
| 711 | void set_value_at_thread_exit(_Rp& __arg); |
||
| 712 | |||
| 713 | _Rp& copy(); |
||
| 714 | }; |
||
| 715 | |||
| 716 | template <class _Rp> |
||
| 717 | void |
||
| 718 | __assoc_state<_Rp&>::__on_zero_shared() _NOEXCEPT |
||
| 719 | {
|
||
| 720 | delete this; |
||
| 721 | } |
||
| 722 | |||
| 723 | template <class _Rp> |
||
| 724 | void |
||
| 725 | __assoc_state<_Rp&>::set_value(_Rp& __arg) |
||
| 726 | {
|
||
| 727 | unique_lock<mutex> __lk(this->__mut_); |
||
| 728 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 729 | if (this->__has_value()) |
||
| 730 | throw future_error(make_error_code(future_errc::promise_already_satisfied)); |
||
| 731 | #endif |
||
| 732 | __value_ = _VSTD::addressof(__arg); |
||
| 733 | this->__state_ |= base::__constructed | base::ready; |
||
| 734 | __cv_.notify_all(); |
||
| 735 | } |
||
| 736 | |||
| 737 | template <class _Rp> |
||
| 738 | void |
||
| 739 | __assoc_state<_Rp&>::set_value_at_thread_exit(_Rp& __arg) |
||
| 740 | {
|
||
| 741 | unique_lock<mutex> __lk(this->__mut_); |
||
| 742 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 743 | if (this->__has_value()) |
||
| 744 | throw future_error(make_error_code(future_errc::promise_already_satisfied)); |
||
| 745 | #endif |
||
| 746 | __value_ = _VSTD::addressof(__arg); |
||
| 747 | this->__state_ |= base::__constructed; |
||
| 748 | __thread_local_data()->__make_ready_at_thread_exit(this); |
||
| 749 | } |
||
| 750 | |||
| 751 | template <class _Rp> |
||
| 752 | _Rp& |
||
| 753 | __assoc_state<_Rp&>::copy() |
||
| 754 | {
|
||
| 755 | unique_lock<mutex> __lk(this->__mut_); |
||
| 756 | this->__sub_wait(__lk); |
||
| 757 | if (this->__exception_ != nullptr) |
||
| 758 | rethrow_exception(this->__exception_); |
||
| 759 | return *__value_; |
||
| 760 | } |
||
| 761 | |||
| 762 | template <class _Rp, class _Alloc> |
||
| 763 | class __assoc_state_alloc |
||
| 764 | : public __assoc_state<_Rp> |
||
| 765 | {
|
||
| 766 | typedef __assoc_state<_Rp> base; |
||
| 767 | _Alloc __alloc_; |
||
| 768 | |||
| 769 | virtual void __on_zero_shared() _NOEXCEPT; |
||
| 770 | public: |
||
| 771 | _LIBCPP_INLINE_VISIBILITY |
||
| 772 | explicit __assoc_state_alloc(const _Alloc& __a) |
||
| 773 | : __alloc_(__a) {}
|
||
| 774 | }; |
||
| 775 | |||
| 776 | template <class _Rp, class _Alloc> |
||
| 777 | void |
||
| 778 | __assoc_state_alloc<_Rp, _Alloc>::__on_zero_shared() _NOEXCEPT |
||
| 779 | {
|
||
| 780 | if (this->__state_ & base::__constructed) |
||
| 781 | reinterpret_cast<_Rp*>(_VSTD::addressof(this->__value_))->~_Rp(); |
||
| 782 | typedef typename __allocator_traits_rebind<_Alloc, __assoc_state_alloc>::type _Al; |
||
| 783 | typedef allocator_traits<_Al> _ATraits; |
||
| 784 | typedef pointer_traits<typename _ATraits::pointer> _PTraits; |
||
| 785 | _Al __a(__alloc_); |
||
| 786 | this->~__assoc_state_alloc(); |
||
| 787 | __a.deallocate(_PTraits::pointer_to(*this), 1); |
||
| 788 | } |
||
| 789 | |||
| 790 | template <class _Rp, class _Alloc> |
||
| 791 | class __assoc_state_alloc<_Rp&, _Alloc> |
||
| 792 | : public __assoc_state<_Rp&> |
||
| 793 | {
|
||
| 794 | typedef __assoc_state<_Rp&> base; |
||
| 795 | _Alloc __alloc_; |
||
| 796 | |||
| 797 | virtual void __on_zero_shared() _NOEXCEPT; |
||
| 798 | public: |
||
| 799 | _LIBCPP_INLINE_VISIBILITY |
||
| 800 | explicit __assoc_state_alloc(const _Alloc& __a) |
||
| 801 | : __alloc_(__a) {}
|
||
| 802 | }; |
||
| 803 | |||
| 804 | template <class _Rp, class _Alloc> |
||
| 805 | void |
||
| 806 | __assoc_state_alloc<_Rp&, _Alloc>::__on_zero_shared() _NOEXCEPT |
||
| 807 | {
|
||
| 808 | typedef typename __allocator_traits_rebind<_Alloc, __assoc_state_alloc>::type _Al; |
||
| 809 | typedef allocator_traits<_Al> _ATraits; |
||
| 810 | typedef pointer_traits<typename _ATraits::pointer> _PTraits; |
||
| 811 | _Al __a(__alloc_); |
||
| 812 | this->~__assoc_state_alloc(); |
||
| 813 | __a.deallocate(_PTraits::pointer_to(*this), 1); |
||
| 814 | } |
||
| 815 | |||
| 816 | template <class _Alloc> |
||
| 817 | class __assoc_sub_state_alloc |
||
| 818 | : public __assoc_sub_state |
||
| 819 | {
|
||
| 820 | typedef __assoc_sub_state base; |
||
| 821 | _Alloc __alloc_; |
||
| 822 | |||
| 823 | virtual void __on_zero_shared() _NOEXCEPT; |
||
| 824 | public: |
||
| 825 | _LIBCPP_INLINE_VISIBILITY |
||
| 826 | explicit __assoc_sub_state_alloc(const _Alloc& __a) |
||
| 827 | : __alloc_(__a) {}
|
||
| 828 | }; |
||
| 829 | |||
| 830 | template <class _Alloc> |
||
| 831 | void |
||
| 832 | __assoc_sub_state_alloc<_Alloc>::__on_zero_shared() _NOEXCEPT |
||
| 833 | {
|
||
| 834 | typedef typename __allocator_traits_rebind<_Alloc, __assoc_sub_state_alloc>::type _Al; |
||
| 835 | typedef allocator_traits<_Al> _ATraits; |
||
| 836 | typedef pointer_traits<typename _ATraits::pointer> _PTraits; |
||
| 837 | _Al __a(__alloc_); |
||
| 838 | this->~__assoc_sub_state_alloc(); |
||
| 839 | __a.deallocate(_PTraits::pointer_to(*this), 1); |
||
| 840 | } |
||
| 841 | |||
| 842 | template <class _Rp, class _Fp> |
||
| 843 | class __deferred_assoc_state |
||
| 844 | : public __assoc_state<_Rp> |
||
| 845 | {
|
||
| 846 | typedef __assoc_state<_Rp> base; |
||
| 847 | |||
| 848 | _Fp __func_; |
||
| 849 | |||
| 850 | public: |
||
| 851 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 852 | explicit __deferred_assoc_state(_Fp&& __f); |
||
| 853 | #endif |
||
| 854 | |||
| 855 | virtual void __execute(); |
||
| 856 | }; |
||
| 857 | |||
| 858 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 859 | |||
| 860 | template <class _Rp, class _Fp> |
||
| 861 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 862 | __deferred_assoc_state<_Rp, _Fp>::__deferred_assoc_state(_Fp&& __f) |
||
| 863 | : __func_(_VSTD::forward<_Fp>(__f)) |
||
| 864 | {
|
||
| 865 | this->__set_deferred(); |
||
| 866 | } |
||
| 867 | |||
| 868 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 869 | |||
| 870 | template <class _Rp, class _Fp> |
||
| 871 | void |
||
| 872 | __deferred_assoc_state<_Rp, _Fp>::__execute() |
||
| 873 | {
|
||
| 874 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 875 | try |
||
| 876 | {
|
||
| 877 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 878 | this->set_value(__func_()); |
||
| 879 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 880 | } |
||
| 881 | catch (...) |
||
| 882 | {
|
||
| 883 | this->set_exception(current_exception()); |
||
| 884 | } |
||
| 885 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 886 | } |
||
| 887 | |||
| 888 | template <class _Fp> |
||
| 889 | class __deferred_assoc_state<void, _Fp> |
||
| 890 | : public __assoc_sub_state |
||
| 891 | {
|
||
| 892 | typedef __assoc_sub_state base; |
||
| 893 | |||
| 894 | _Fp __func_; |
||
| 895 | |||
| 896 | public: |
||
| 897 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 898 | explicit __deferred_assoc_state(_Fp&& __f); |
||
| 899 | #endif |
||
| 900 | |||
| 901 | virtual void __execute(); |
||
| 902 | }; |
||
| 903 | |||
| 904 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 905 | |||
| 906 | template <class _Fp> |
||
| 907 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 908 | __deferred_assoc_state<void, _Fp>::__deferred_assoc_state(_Fp&& __f) |
||
| 909 | : __func_(_VSTD::forward<_Fp>(__f)) |
||
| 910 | {
|
||
| 911 | this->__set_deferred(); |
||
| 912 | } |
||
| 913 | |||
| 914 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 915 | |||
| 916 | template <class _Fp> |
||
| 917 | void |
||
| 918 | __deferred_assoc_state<void, _Fp>::__execute() |
||
| 919 | {
|
||
| 920 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 921 | try |
||
| 922 | {
|
||
| 923 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 924 | __func_(); |
||
| 925 | this->set_value(); |
||
| 926 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 927 | } |
||
| 928 | catch (...) |
||
| 929 | {
|
||
| 930 | this->set_exception(current_exception()); |
||
| 931 | } |
||
| 932 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 933 | } |
||
| 934 | |||
| 935 | template <class _Rp, class _Fp> |
||
| 936 | class __async_assoc_state |
||
| 937 | : public __assoc_state<_Rp> |
||
| 938 | {
|
||
| 939 | typedef __assoc_state<_Rp> base; |
||
| 940 | |||
| 941 | _Fp __func_; |
||
| 942 | |||
| 943 | virtual void __on_zero_shared() _NOEXCEPT; |
||
| 944 | public: |
||
| 945 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 946 | explicit __async_assoc_state(_Fp&& __f); |
||
| 947 | #endif |
||
| 948 | |||
| 949 | virtual void __execute(); |
||
| 950 | }; |
||
| 951 | |||
| 952 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 953 | |||
| 954 | template <class _Rp, class _Fp> |
||
| 955 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 956 | __async_assoc_state<_Rp, _Fp>::__async_assoc_state(_Fp&& __f) |
||
| 957 | : __func_(_VSTD::forward<_Fp>(__f)) |
||
| 958 | {
|
||
| 959 | } |
||
| 960 | |||
| 961 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 962 | |||
| 963 | template <class _Rp, class _Fp> |
||
| 964 | void |
||
| 965 | __async_assoc_state<_Rp, _Fp>::__execute() |
||
| 966 | {
|
||
| 967 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 968 | try |
||
| 969 | {
|
||
| 970 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 971 | this->set_value(__func_()); |
||
| 972 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 973 | } |
||
| 974 | catch (...) |
||
| 975 | {
|
||
| 976 | this->set_exception(current_exception()); |
||
| 977 | } |
||
| 978 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 979 | } |
||
| 980 | |||
| 981 | template <class _Rp, class _Fp> |
||
| 982 | void |
||
| 983 | __async_assoc_state<_Rp, _Fp>::__on_zero_shared() _NOEXCEPT |
||
| 984 | {
|
||
| 985 | this->wait(); |
||
| 986 | base::__on_zero_shared(); |
||
| 987 | } |
||
| 988 | |||
| 989 | template <class _Fp> |
||
| 990 | class __async_assoc_state<void, _Fp> |
||
| 991 | : public __assoc_sub_state |
||
| 992 | {
|
||
| 993 | typedef __assoc_sub_state base; |
||
| 994 | |||
| 995 | _Fp __func_; |
||
| 996 | |||
| 997 | virtual void __on_zero_shared() _NOEXCEPT; |
||
| 998 | public: |
||
| 999 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1000 | explicit __async_assoc_state(_Fp&& __f); |
||
| 1001 | #endif |
||
| 1002 | |||
| 1003 | virtual void __execute(); |
||
| 1004 | }; |
||
| 1005 | |||
| 1006 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1007 | |||
| 1008 | template <class _Fp> |
||
| 1009 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 1010 | __async_assoc_state<void, _Fp>::__async_assoc_state(_Fp&& __f) |
||
| 1011 | : __func_(_VSTD::forward<_Fp>(__f)) |
||
| 1012 | {
|
||
| 1013 | } |
||
| 1014 | |||
| 1015 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1016 | |||
| 1017 | template <class _Fp> |
||
| 1018 | void |
||
| 1019 | __async_assoc_state<void, _Fp>::__execute() |
||
| 1020 | {
|
||
| 1021 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1022 | try |
||
| 1023 | {
|
||
| 1024 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 1025 | __func_(); |
||
| 1026 | this->set_value(); |
||
| 1027 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1028 | } |
||
| 1029 | catch (...) |
||
| 1030 | {
|
||
| 1031 | this->set_exception(current_exception()); |
||
| 1032 | } |
||
| 1033 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 1034 | } |
||
| 1035 | |||
| 1036 | template <class _Fp> |
||
| 1037 | void |
||
| 1038 | __async_assoc_state<void, _Fp>::__on_zero_shared() _NOEXCEPT |
||
| 1039 | {
|
||
| 1040 | this->wait(); |
||
| 1041 | base::__on_zero_shared(); |
||
| 1042 | } |
||
| 1043 | |||
| 1044 | template <class _Rp> class _LIBCPP_TYPE_VIS_ONLY promise; |
||
| 1045 | template <class _Rp> class _LIBCPP_TYPE_VIS_ONLY shared_future; |
||
| 1046 | |||
| 1047 | // future |
||
| 1048 | |||
| 1049 | template <class _Rp> class _LIBCPP_TYPE_VIS_ONLY future; |
||
| 1050 | |||
| 1051 | template <class _Rp, class _Fp> |
||
| 1052 | future<_Rp> |
||
| 1053 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1054 | __make_deferred_assoc_state(_Fp&& __f); |
||
| 1055 | #else |
||
| 1056 | __make_deferred_assoc_state(_Fp __f); |
||
| 1057 | #endif |
||
| 1058 | |||
| 1059 | template <class _Rp, class _Fp> |
||
| 1060 | future<_Rp> |
||
| 1061 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1062 | __make_async_assoc_state(_Fp&& __f); |
||
| 1063 | #else |
||
| 1064 | __make_async_assoc_state(_Fp __f); |
||
| 1065 | #endif |
||
| 1066 | |||
| 1067 | template <class _Rp> |
||
| 1068 | class _LIBCPP_TYPE_VIS_ONLY future |
||
| 1069 | {
|
||
| 1070 | __assoc_state<_Rp>* __state_; |
||
| 1071 | |||
| 1072 | explicit future(__assoc_state<_Rp>* __state); |
||
| 1073 | |||
| 1074 | template <class> friend class promise; |
||
| 1075 | template <class> friend class shared_future; |
||
| 1076 | |||
| 1077 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1078 | template <class _R1, class _Fp> |
||
| 1079 | friend future<_R1> __make_deferred_assoc_state(_Fp&& __f); |
||
| 1080 | template <class _R1, class _Fp> |
||
| 1081 | friend future<_R1> __make_async_assoc_state(_Fp&& __f); |
||
| 1082 | #else |
||
| 1083 | template <class _R1, class _Fp> |
||
| 1084 | friend future<_R1> __make_deferred_assoc_state(_Fp __f); |
||
| 1085 | template <class _R1, class _Fp> |
||
| 1086 | friend future<_R1> __make_async_assoc_state(_Fp __f); |
||
| 1087 | #endif |
||
| 1088 | |||
| 1089 | public: |
||
| 1090 | _LIBCPP_INLINE_VISIBILITY |
||
| 1091 | future() _NOEXCEPT : __state_(nullptr) {}
|
||
| 1092 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1093 | _LIBCPP_INLINE_VISIBILITY |
||
| 1094 | future(future&& __rhs) _NOEXCEPT |
||
| 1095 | : __state_(__rhs.__state_) {__rhs.__state_ = nullptr;}
|
||
| 1096 | future(const future&) = delete; |
||
| 1097 | future& operator=(const future&) = delete; |
||
| 1098 | _LIBCPP_INLINE_VISIBILITY |
||
| 1099 | future& operator=(future&& __rhs) _NOEXCEPT |
||
| 1100 | {
|
||
| 1101 | future(std::move(__rhs)).swap(*this); |
||
| 1102 | return *this; |
||
| 1103 | } |
||
| 1104 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1105 | private: |
||
| 1106 | future(const future&); |
||
| 1107 | future& operator=(const future&); |
||
| 1108 | public: |
||
| 1109 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1110 | ~future(); |
||
| 1111 | shared_future<_Rp> share(); |
||
| 1112 | |||
| 1113 | // retrieving the value |
||
| 1114 | _Rp get(); |
||
| 1115 | |||
| 1116 | _LIBCPP_INLINE_VISIBILITY |
||
| 1117 | void swap(future& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
||
| 1118 | |||
| 1119 | // functions to check state |
||
| 1120 | _LIBCPP_INLINE_VISIBILITY |
||
| 1121 | bool valid() const _NOEXCEPT {return __state_ != nullptr;}
|
||
| 1122 | |||
| 1123 | _LIBCPP_INLINE_VISIBILITY |
||
| 1124 | void wait() const {__state_->wait();}
|
||
| 1125 | template <class _Rep, class _Period> |
||
| 1126 | _LIBCPP_INLINE_VISIBILITY |
||
| 1127 | future_status |
||
| 1128 | wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const |
||
| 1129 | {return __state_->wait_for(__rel_time);}
|
||
| 1130 | template <class _Clock, class _Duration> |
||
| 1131 | _LIBCPP_INLINE_VISIBILITY |
||
| 1132 | future_status |
||
| 1133 | wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const |
||
| 1134 | {return __state_->wait_until(__abs_time);}
|
||
| 1135 | }; |
||
| 1136 | |||
| 1137 | template <class _Rp> |
||
| 1138 | future<_Rp>::future(__assoc_state<_Rp>* __state) |
||
| 1139 | : __state_(__state) |
||
| 1140 | {
|
||
| 1141 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1142 | if (__state_->__has_future_attached()) |
||
| 1143 | throw future_error(make_error_code(future_errc::future_already_retrieved)); |
||
| 1144 | #endif |
||
| 1145 | __state_->__add_shared(); |
||
| 1146 | __state_->__set_future_attached(); |
||
| 1147 | } |
||
| 1148 | |||
| 1149 | struct __release_shared_count |
||
| 1150 | {
|
||
| 1151 | void operator()(__shared_count* p) {p->__release_shared();}
|
||
| 1152 | }; |
||
| 1153 | |||
| 1154 | template <class _Rp> |
||
| 1155 | future<_Rp>::~future() |
||
| 1156 | {
|
||
| 1157 | if (__state_) |
||
| 1158 | __state_->__release_shared(); |
||
| 1159 | } |
||
| 1160 | |||
| 1161 | template <class _Rp> |
||
| 1162 | _Rp |
||
| 1163 | future<_Rp>::get() |
||
| 1164 | {
|
||
| 1165 | unique_ptr<__shared_count, __release_shared_count> __(__state_); |
||
| 1166 | __assoc_state<_Rp>* __s = __state_; |
||
| 1167 | __state_ = nullptr; |
||
| 1168 | return __s->move(); |
||
| 1169 | } |
||
| 1170 | |||
| 1171 | template <class _Rp> |
||
| 1172 | class _LIBCPP_TYPE_VIS_ONLY future<_Rp&> |
||
| 1173 | {
|
||
| 1174 | __assoc_state<_Rp&>* __state_; |
||
| 1175 | |||
| 1176 | explicit future(__assoc_state<_Rp&>* __state); |
||
| 1177 | |||
| 1178 | template <class> friend class promise; |
||
| 1179 | template <class> friend class shared_future; |
||
| 1180 | |||
| 1181 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1182 | template <class _R1, class _Fp> |
||
| 1183 | friend future<_R1> __make_deferred_assoc_state(_Fp&& __f); |
||
| 1184 | template <class _R1, class _Fp> |
||
| 1185 | friend future<_R1> __make_async_assoc_state(_Fp&& __f); |
||
| 1186 | #else |
||
| 1187 | template <class _R1, class _Fp> |
||
| 1188 | friend future<_R1> __make_deferred_assoc_state(_Fp __f); |
||
| 1189 | template <class _R1, class _Fp> |
||
| 1190 | friend future<_R1> __make_async_assoc_state(_Fp __f); |
||
| 1191 | #endif |
||
| 1192 | |||
| 1193 | public: |
||
| 1194 | _LIBCPP_INLINE_VISIBILITY |
||
| 1195 | future() _NOEXCEPT : __state_(nullptr) {}
|
||
| 1196 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1197 | _LIBCPP_INLINE_VISIBILITY |
||
| 1198 | future(future&& __rhs) _NOEXCEPT |
||
| 1199 | : __state_(__rhs.__state_) {__rhs.__state_ = nullptr;}
|
||
| 1200 | future(const future&) = delete; |
||
| 1201 | future& operator=(const future&) = delete; |
||
| 1202 | _LIBCPP_INLINE_VISIBILITY |
||
| 1203 | future& operator=(future&& __rhs) _NOEXCEPT |
||
| 1204 | {
|
||
| 1205 | future(std::move(__rhs)).swap(*this); |
||
| 1206 | return *this; |
||
| 1207 | } |
||
| 1208 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1209 | private: |
||
| 1210 | future(const future&); |
||
| 1211 | future& operator=(const future&); |
||
| 1212 | public: |
||
| 1213 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1214 | ~future(); |
||
| 1215 | shared_future<_Rp&> share(); |
||
| 1216 | |||
| 1217 | // retrieving the value |
||
| 1218 | _Rp& get(); |
||
| 1219 | |||
| 1220 | _LIBCPP_INLINE_VISIBILITY |
||
| 1221 | void swap(future& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
||
| 1222 | |||
| 1223 | // functions to check state |
||
| 1224 | _LIBCPP_INLINE_VISIBILITY |
||
| 1225 | bool valid() const _NOEXCEPT {return __state_ != nullptr;}
|
||
| 1226 | |||
| 1227 | _LIBCPP_INLINE_VISIBILITY |
||
| 1228 | void wait() const {__state_->wait();}
|
||
| 1229 | template <class _Rep, class _Period> |
||
| 1230 | _LIBCPP_INLINE_VISIBILITY |
||
| 1231 | future_status |
||
| 1232 | wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const |
||
| 1233 | {return __state_->wait_for(__rel_time);}
|
||
| 1234 | template <class _Clock, class _Duration> |
||
| 1235 | _LIBCPP_INLINE_VISIBILITY |
||
| 1236 | future_status |
||
| 1237 | wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const |
||
| 1238 | {return __state_->wait_until(__abs_time);}
|
||
| 1239 | }; |
||
| 1240 | |||
| 1241 | template <class _Rp> |
||
| 1242 | future<_Rp&>::future(__assoc_state<_Rp&>* __state) |
||
| 1243 | : __state_(__state) |
||
| 1244 | {
|
||
| 1245 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1246 | if (__state_->__has_future_attached()) |
||
| 1247 | throw future_error(make_error_code(future_errc::future_already_retrieved)); |
||
| 1248 | #endif |
||
| 1249 | __state_->__add_shared(); |
||
| 1250 | __state_->__set_future_attached(); |
||
| 1251 | } |
||
| 1252 | |||
| 1253 | template <class _Rp> |
||
| 1254 | future<_Rp&>::~future() |
||
| 1255 | {
|
||
| 1256 | if (__state_) |
||
| 1257 | __state_->__release_shared(); |
||
| 1258 | } |
||
| 1259 | |||
| 1260 | template <class _Rp> |
||
| 1261 | _Rp& |
||
| 1262 | future<_Rp&>::get() |
||
| 1263 | {
|
||
| 1264 | unique_ptr<__shared_count, __release_shared_count> __(__state_); |
||
| 1265 | __assoc_state<_Rp&>* __s = __state_; |
||
| 1266 | __state_ = nullptr; |
||
| 1267 | return __s->copy(); |
||
| 1268 | } |
||
| 1269 | |||
| 1270 | template <> |
||
| 1271 | class _LIBCPP_TYPE_VIS future<void> |
||
| 1272 | {
|
||
| 1273 | __assoc_sub_state* __state_; |
||
| 1274 | |||
| 1275 | explicit future(__assoc_sub_state* __state); |
||
| 1276 | |||
| 1277 | template <class> friend class promise; |
||
| 1278 | template <class> friend class shared_future; |
||
| 1279 | |||
| 1280 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1281 | template <class _R1, class _Fp> |
||
| 1282 | friend future<_R1> __make_deferred_assoc_state(_Fp&& __f); |
||
| 1283 | template <class _R1, class _Fp> |
||
| 1284 | friend future<_R1> __make_async_assoc_state(_Fp&& __f); |
||
| 1285 | #else |
||
| 1286 | template <class _R1, class _Fp> |
||
| 1287 | friend future<_R1> __make_deferred_assoc_state(_Fp __f); |
||
| 1288 | template <class _R1, class _Fp> |
||
| 1289 | friend future<_R1> __make_async_assoc_state(_Fp __f); |
||
| 1290 | #endif |
||
| 1291 | |||
| 1292 | public: |
||
| 1293 | _LIBCPP_INLINE_VISIBILITY |
||
| 1294 | future() _NOEXCEPT : __state_(nullptr) {}
|
||
| 1295 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1296 | _LIBCPP_INLINE_VISIBILITY |
||
| 1297 | future(future&& __rhs) _NOEXCEPT |
||
| 1298 | : __state_(__rhs.__state_) {__rhs.__state_ = nullptr;}
|
||
| 1299 | future(const future&) = delete; |
||
| 1300 | future& operator=(const future&) = delete; |
||
| 1301 | _LIBCPP_INLINE_VISIBILITY |
||
| 1302 | future& operator=(future&& __rhs) _NOEXCEPT |
||
| 1303 | {
|
||
| 1304 | future(std::move(__rhs)).swap(*this); |
||
| 1305 | return *this; |
||
| 1306 | } |
||
| 1307 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1308 | private: |
||
| 1309 | future(const future&); |
||
| 1310 | future& operator=(const future&); |
||
| 1311 | public: |
||
| 1312 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1313 | ~future(); |
||
| 1314 | shared_future<void> share(); |
||
| 1315 | |||
| 1316 | // retrieving the value |
||
| 1317 | void get(); |
||
| 1318 | |||
| 1319 | _LIBCPP_INLINE_VISIBILITY |
||
| 1320 | void swap(future& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
||
| 1321 | |||
| 1322 | // functions to check state |
||
| 1323 | _LIBCPP_INLINE_VISIBILITY |
||
| 1324 | bool valid() const _NOEXCEPT {return __state_ != nullptr;}
|
||
| 1325 | |||
| 1326 | _LIBCPP_INLINE_VISIBILITY |
||
| 1327 | void wait() const {__state_->wait();}
|
||
| 1328 | template <class _Rep, class _Period> |
||
| 1329 | _LIBCPP_INLINE_VISIBILITY |
||
| 1330 | future_status |
||
| 1331 | wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const |
||
| 1332 | {return __state_->wait_for(__rel_time);}
|
||
| 1333 | template <class _Clock, class _Duration> |
||
| 1334 | _LIBCPP_INLINE_VISIBILITY |
||
| 1335 | future_status |
||
| 1336 | wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const |
||
| 1337 | {return __state_->wait_until(__abs_time);}
|
||
| 1338 | }; |
||
| 1339 | |||
| 1340 | template <class _Rp> |
||
| 1341 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 1342 | void |
||
| 1343 | swap(future<_Rp>& __x, future<_Rp>& __y) _NOEXCEPT |
||
| 1344 | {
|
||
| 1345 | __x.swap(__y); |
||
| 1346 | } |
||
| 1347 | |||
| 1348 | // promise<R> |
||
| 1349 | |||
| 1350 | template <class _Callable> class packaged_task; |
||
| 1351 | |||
| 1352 | template <class _Rp> |
||
| 1353 | class _LIBCPP_TYPE_VIS_ONLY promise |
||
| 1354 | {
|
||
| 1355 | __assoc_state<_Rp>* __state_; |
||
| 1356 | |||
| 1357 | _LIBCPP_INLINE_VISIBILITY |
||
| 1358 | explicit promise(nullptr_t) _NOEXCEPT : __state_(nullptr) {}
|
||
| 1359 | |||
| 1360 | template <class> friend class packaged_task; |
||
| 1361 | public: |
||
| 1362 | promise(); |
||
| 1363 | template <class _Alloc> |
||
| 1364 | promise(allocator_arg_t, const _Alloc& __a); |
||
| 1365 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1366 | _LIBCPP_INLINE_VISIBILITY |
||
| 1367 | promise(promise&& __rhs) _NOEXCEPT |
||
| 1368 | : __state_(__rhs.__state_) {__rhs.__state_ = nullptr;}
|
||
| 1369 | promise(const promise& __rhs) = delete; |
||
| 1370 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1371 | private: |
||
| 1372 | promise(const promise& __rhs); |
||
| 1373 | public: |
||
| 1374 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1375 | ~promise(); |
||
| 1376 | |||
| 1377 | // assignment |
||
| 1378 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1379 | _LIBCPP_INLINE_VISIBILITY |
||
| 1380 | promise& operator=(promise&& __rhs) _NOEXCEPT |
||
| 1381 | {
|
||
| 1382 | promise(std::move(__rhs)).swap(*this); |
||
| 1383 | return *this; |
||
| 1384 | } |
||
| 1385 | promise& operator=(const promise& __rhs) = delete; |
||
| 1386 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1387 | private: |
||
| 1388 | promise& operator=(const promise& __rhs); |
||
| 1389 | public: |
||
| 1390 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1391 | _LIBCPP_INLINE_VISIBILITY |
||
| 1392 | void swap(promise& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
||
| 1393 | |||
| 1394 | // retrieving the result |
||
| 1395 | future<_Rp> get_future(); |
||
| 1396 | |||
| 1397 | // setting the result |
||
| 1398 | void set_value(const _Rp& __r); |
||
| 1399 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1400 | void set_value(_Rp&& __r); |
||
| 1401 | #endif |
||
| 1402 | void set_exception(exception_ptr __p); |
||
| 1403 | |||
| 1404 | // setting the result with deferred notification |
||
| 1405 | void set_value_at_thread_exit(const _Rp& __r); |
||
| 1406 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1407 | void set_value_at_thread_exit(_Rp&& __r); |
||
| 1408 | #endif |
||
| 1409 | void set_exception_at_thread_exit(exception_ptr __p); |
||
| 1410 | }; |
||
| 1411 | |||
| 1412 | template <class _Rp> |
||
| 1413 | promise<_Rp>::promise() |
||
| 1414 | : __state_(new __assoc_state<_Rp>) |
||
| 1415 | {
|
||
| 1416 | } |
||
| 1417 | |||
| 1418 | template <class _Rp> |
||
| 1419 | template <class _Alloc> |
||
| 1420 | promise<_Rp>::promise(allocator_arg_t, const _Alloc& __a0) |
||
| 1421 | {
|
||
| 1422 | typedef __assoc_state_alloc<_Rp, _Alloc> _State; |
||
| 1423 | typedef typename __allocator_traits_rebind<_Alloc, _State>::type _A2; |
||
| 1424 | typedef __allocator_destructor<_A2> _D2; |
||
| 1425 | _A2 __a(__a0); |
||
| 1426 | unique_ptr<_State, _D2> __hold(__a.allocate(1), _D2(__a, 1)); |
||
| 1427 | ::new(static_cast<void*>(_VSTD::addressof(*__hold.get()))) _State(__a0); |
||
| 1428 | __state_ = _VSTD::addressof(*__hold.release()); |
||
| 1429 | } |
||
| 1430 | |||
| 1431 | template <class _Rp> |
||
| 1432 | promise<_Rp>::~promise() |
||
| 1433 | {
|
||
| 1434 | if (__state_) |
||
| 1435 | {
|
||
| 1436 | if (!__state_->__has_value() && __state_->use_count() > 1) |
||
| 1437 | __state_->set_exception(make_exception_ptr( |
||
| 1438 | future_error(make_error_code(future_errc::broken_promise)) |
||
| 1439 | )); |
||
| 1440 | __state_->__release_shared(); |
||
| 1441 | } |
||
| 1442 | } |
||
| 1443 | |||
| 1444 | template <class _Rp> |
||
| 1445 | future<_Rp> |
||
| 1446 | promise<_Rp>::get_future() |
||
| 1447 | {
|
||
| 1448 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1449 | if (__state_ == nullptr) |
||
| 1450 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 1451 | #endif |
||
| 1452 | return future<_Rp>(__state_); |
||
| 1453 | } |
||
| 1454 | |||
| 1455 | template <class _Rp> |
||
| 1456 | void |
||
| 1457 | promise<_Rp>::set_value(const _Rp& __r) |
||
| 1458 | {
|
||
| 1459 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1460 | if (__state_ == nullptr) |
||
| 1461 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 1462 | #endif |
||
| 1463 | __state_->set_value(__r); |
||
| 1464 | } |
||
| 1465 | |||
| 1466 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1467 | |||
| 1468 | template <class _Rp> |
||
| 1469 | void |
||
| 1470 | promise<_Rp>::set_value(_Rp&& __r) |
||
| 1471 | {
|
||
| 1472 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1473 | if (__state_ == nullptr) |
||
| 1474 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 1475 | #endif |
||
| 1476 | __state_->set_value(_VSTD::move(__r)); |
||
| 1477 | } |
||
| 1478 | |||
| 1479 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1480 | |||
| 1481 | template <class _Rp> |
||
| 1482 | void |
||
| 1483 | promise<_Rp>::set_exception(exception_ptr __p) |
||
| 1484 | {
|
||
| 1485 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1486 | if (__state_ == nullptr) |
||
| 1487 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 1488 | #endif |
||
| 1489 | __state_->set_exception(__p); |
||
| 1490 | } |
||
| 1491 | |||
| 1492 | template <class _Rp> |
||
| 1493 | void |
||
| 1494 | promise<_Rp>::set_value_at_thread_exit(const _Rp& __r) |
||
| 1495 | {
|
||
| 1496 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1497 | if (__state_ == nullptr) |
||
| 1498 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 1499 | #endif |
||
| 1500 | __state_->set_value_at_thread_exit(__r); |
||
| 1501 | } |
||
| 1502 | |||
| 1503 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1504 | |||
| 1505 | template <class _Rp> |
||
| 1506 | void |
||
| 1507 | promise<_Rp>::set_value_at_thread_exit(_Rp&& __r) |
||
| 1508 | {
|
||
| 1509 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1510 | if (__state_ == nullptr) |
||
| 1511 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 1512 | #endif |
||
| 1513 | __state_->set_value_at_thread_exit(_VSTD::move(__r)); |
||
| 1514 | } |
||
| 1515 | |||
| 1516 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1517 | |||
| 1518 | template <class _Rp> |
||
| 1519 | void |
||
| 1520 | promise<_Rp>::set_exception_at_thread_exit(exception_ptr __p) |
||
| 1521 | {
|
||
| 1522 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1523 | if (__state_ == nullptr) |
||
| 1524 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 1525 | #endif |
||
| 1526 | __state_->set_exception_at_thread_exit(__p); |
||
| 1527 | } |
||
| 1528 | |||
| 1529 | // promise<R&> |
||
| 1530 | |||
| 1531 | template <class _Rp> |
||
| 1532 | class _LIBCPP_TYPE_VIS_ONLY promise<_Rp&> |
||
| 1533 | {
|
||
| 1534 | __assoc_state<_Rp&>* __state_; |
||
| 1535 | |||
| 1536 | _LIBCPP_INLINE_VISIBILITY |
||
| 1537 | explicit promise(nullptr_t) _NOEXCEPT : __state_(nullptr) {}
|
||
| 1538 | |||
| 1539 | template <class> friend class packaged_task; |
||
| 1540 | |||
| 1541 | public: |
||
| 1542 | promise(); |
||
| 1543 | template <class _Allocator> |
||
| 1544 | promise(allocator_arg_t, const _Allocator& __a); |
||
| 1545 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1546 | _LIBCPP_INLINE_VISIBILITY |
||
| 1547 | promise(promise&& __rhs) _NOEXCEPT |
||
| 1548 | : __state_(__rhs.__state_) {__rhs.__state_ = nullptr;}
|
||
| 1549 | promise(const promise& __rhs) = delete; |
||
| 1550 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1551 | private: |
||
| 1552 | promise(const promise& __rhs); |
||
| 1553 | public: |
||
| 1554 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1555 | ~promise(); |
||
| 1556 | |||
| 1557 | // assignment |
||
| 1558 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1559 | _LIBCPP_INLINE_VISIBILITY |
||
| 1560 | promise& operator=(promise&& __rhs) _NOEXCEPT |
||
| 1561 | {
|
||
| 1562 | promise(std::move(__rhs)).swap(*this); |
||
| 1563 | return *this; |
||
| 1564 | } |
||
| 1565 | promise& operator=(const promise& __rhs) = delete; |
||
| 1566 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1567 | private: |
||
| 1568 | promise& operator=(const promise& __rhs); |
||
| 1569 | public: |
||
| 1570 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1571 | _LIBCPP_INLINE_VISIBILITY |
||
| 1572 | void swap(promise& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
||
| 1573 | |||
| 1574 | // retrieving the result |
||
| 1575 | future<_Rp&> get_future(); |
||
| 1576 | |||
| 1577 | // setting the result |
||
| 1578 | void set_value(_Rp& __r); |
||
| 1579 | void set_exception(exception_ptr __p); |
||
| 1580 | |||
| 1581 | // setting the result with deferred notification |
||
| 1582 | void set_value_at_thread_exit(_Rp&); |
||
| 1583 | void set_exception_at_thread_exit(exception_ptr __p); |
||
| 1584 | }; |
||
| 1585 | |||
| 1586 | template <class _Rp> |
||
| 1587 | promise<_Rp&>::promise() |
||
| 1588 | : __state_(new __assoc_state<_Rp&>) |
||
| 1589 | {
|
||
| 1590 | } |
||
| 1591 | |||
| 1592 | template <class _Rp> |
||
| 1593 | template <class _Alloc> |
||
| 1594 | promise<_Rp&>::promise(allocator_arg_t, const _Alloc& __a0) |
||
| 1595 | {
|
||
| 1596 | typedef __assoc_state_alloc<_Rp&, _Alloc> _State; |
||
| 1597 | typedef typename __allocator_traits_rebind<_Alloc, _State>::type _A2; |
||
| 1598 | typedef __allocator_destructor<_A2> _D2; |
||
| 1599 | _A2 __a(__a0); |
||
| 1600 | unique_ptr<_State, _D2> __hold(__a.allocate(1), _D2(__a, 1)); |
||
| 1601 | ::new(static_cast<void*>(_VSTD::addressof(*__hold.get()))) _State(__a0); |
||
| 1602 | __state_ = _VSTD::addressof(*__hold.release()); |
||
| 1603 | } |
||
| 1604 | |||
| 1605 | template <class _Rp> |
||
| 1606 | promise<_Rp&>::~promise() |
||
| 1607 | {
|
||
| 1608 | if (__state_) |
||
| 1609 | {
|
||
| 1610 | if (!__state_->__has_value() && __state_->use_count() > 1) |
||
| 1611 | __state_->set_exception(make_exception_ptr( |
||
| 1612 | future_error(make_error_code(future_errc::broken_promise)) |
||
| 1613 | )); |
||
| 1614 | __state_->__release_shared(); |
||
| 1615 | } |
||
| 1616 | } |
||
| 1617 | |||
| 1618 | template <class _Rp> |
||
| 1619 | future<_Rp&> |
||
| 1620 | promise<_Rp&>::get_future() |
||
| 1621 | {
|
||
| 1622 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1623 | if (__state_ == nullptr) |
||
| 1624 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 1625 | #endif |
||
| 1626 | return future<_Rp&>(__state_); |
||
| 1627 | } |
||
| 1628 | |||
| 1629 | template <class _Rp> |
||
| 1630 | void |
||
| 1631 | promise<_Rp&>::set_value(_Rp& __r) |
||
| 1632 | {
|
||
| 1633 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1634 | if (__state_ == nullptr) |
||
| 1635 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 1636 | #endif |
||
| 1637 | __state_->set_value(__r); |
||
| 1638 | } |
||
| 1639 | |||
| 1640 | template <class _Rp> |
||
| 1641 | void |
||
| 1642 | promise<_Rp&>::set_exception(exception_ptr __p) |
||
| 1643 | {
|
||
| 1644 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1645 | if (__state_ == nullptr) |
||
| 1646 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 1647 | #endif |
||
| 1648 | __state_->set_exception(__p); |
||
| 1649 | } |
||
| 1650 | |||
| 1651 | template <class _Rp> |
||
| 1652 | void |
||
| 1653 | promise<_Rp&>::set_value_at_thread_exit(_Rp& __r) |
||
| 1654 | {
|
||
| 1655 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1656 | if (__state_ == nullptr) |
||
| 1657 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 1658 | #endif |
||
| 1659 | __state_->set_value_at_thread_exit(__r); |
||
| 1660 | } |
||
| 1661 | |||
| 1662 | template <class _Rp> |
||
| 1663 | void |
||
| 1664 | promise<_Rp&>::set_exception_at_thread_exit(exception_ptr __p) |
||
| 1665 | {
|
||
| 1666 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 1667 | if (__state_ == nullptr) |
||
| 1668 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 1669 | #endif |
||
| 1670 | __state_->set_exception_at_thread_exit(__p); |
||
| 1671 | } |
||
| 1672 | |||
| 1673 | // promise<void> |
||
| 1674 | |||
| 1675 | template <> |
||
| 1676 | class _LIBCPP_TYPE_VIS promise<void> |
||
| 1677 | {
|
||
| 1678 | __assoc_sub_state* __state_; |
||
| 1679 | |||
| 1680 | _LIBCPP_INLINE_VISIBILITY |
||
| 1681 | explicit promise(nullptr_t) _NOEXCEPT : __state_(nullptr) {}
|
||
| 1682 | |||
| 1683 | template <class> friend class packaged_task; |
||
| 1684 | |||
| 1685 | public: |
||
| 1686 | promise(); |
||
| 1687 | template <class _Allocator> |
||
| 1688 | promise(allocator_arg_t, const _Allocator& __a); |
||
| 1689 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1690 | _LIBCPP_INLINE_VISIBILITY |
||
| 1691 | promise(promise&& __rhs) _NOEXCEPT |
||
| 1692 | : __state_(__rhs.__state_) {__rhs.__state_ = nullptr;}
|
||
| 1693 | promise(const promise& __rhs) = delete; |
||
| 1694 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1695 | private: |
||
| 1696 | promise(const promise& __rhs); |
||
| 1697 | public: |
||
| 1698 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1699 | ~promise(); |
||
| 1700 | |||
| 1701 | // assignment |
||
| 1702 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1703 | _LIBCPP_INLINE_VISIBILITY |
||
| 1704 | promise& operator=(promise&& __rhs) _NOEXCEPT |
||
| 1705 | {
|
||
| 1706 | promise(std::move(__rhs)).swap(*this); |
||
| 1707 | return *this; |
||
| 1708 | } |
||
| 1709 | promise& operator=(const promise& __rhs) = delete; |
||
| 1710 | #else // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1711 | private: |
||
| 1712 | promise& operator=(const promise& __rhs); |
||
| 1713 | public: |
||
| 1714 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 1715 | _LIBCPP_INLINE_VISIBILITY |
||
| 1716 | void swap(promise& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
||
| 1717 | |||
| 1718 | // retrieving the result |
||
| 1719 | future<void> get_future(); |
||
| 1720 | |||
| 1721 | // setting the result |
||
| 1722 | void set_value(); |
||
| 1723 | void set_exception(exception_ptr __p); |
||
| 1724 | |||
| 1725 | // setting the result with deferred notification |
||
| 1726 | void set_value_at_thread_exit(); |
||
| 1727 | void set_exception_at_thread_exit(exception_ptr __p); |
||
| 1728 | }; |
||
| 1729 | |||
| 1730 | template <class _Alloc> |
||
| 1731 | promise<void>::promise(allocator_arg_t, const _Alloc& __a0) |
||
| 1732 | {
|
||
| 1733 | typedef __assoc_sub_state_alloc<_Alloc> _State; |
||
| 1734 | typedef typename __allocator_traits_rebind<_Alloc, _State>::type _A2; |
||
| 1735 | typedef __allocator_destructor<_A2> _D2; |
||
| 1736 | _A2 __a(__a0); |
||
| 1737 | unique_ptr<_State, _D2> __hold(__a.allocate(1), _D2(__a, 1)); |
||
| 1738 | ::new(static_cast<void*>(_VSTD::addressof(*__hold.get()))) _State(__a0); |
||
| 1739 | __state_ = _VSTD::addressof(*__hold.release()); |
||
| 1740 | } |
||
| 1741 | |||
| 1742 | template <class _Rp> |
||
| 1743 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 1744 | void |
||
| 1745 | swap(promise<_Rp>& __x, promise<_Rp>& __y) _NOEXCEPT |
||
| 1746 | {
|
||
| 1747 | __x.swap(__y); |
||
| 1748 | } |
||
| 1749 | |||
| 1750 | template <class _Rp, class _Alloc> |
||
| 1751 | struct _LIBCPP_TYPE_VIS_ONLY uses_allocator<promise<_Rp>, _Alloc> |
||
| 1752 | : public true_type {};
|
||
| 1753 | |||
| 1754 | #ifndef _LIBCPP_HAS_NO_VARIADICS |
||
| 1755 | |||
| 1756 | // packaged_task |
||
| 1757 | |||
| 1758 | template<class _Fp> class __packaged_task_base; |
||
| 1759 | |||
| 1760 | template<class _Rp, class ..._ArgTypes> |
||
| 1761 | class __packaged_task_base<_Rp(_ArgTypes...)> |
||
| 1762 | {
|
||
| 1763 | __packaged_task_base(const __packaged_task_base&); |
||
| 1764 | __packaged_task_base& operator=(const __packaged_task_base&); |
||
| 1765 | public: |
||
| 1766 | _LIBCPP_INLINE_VISIBILITY |
||
| 1767 | __packaged_task_base() {}
|
||
| 1768 | _LIBCPP_INLINE_VISIBILITY |
||
| 1769 | virtual ~__packaged_task_base() {}
|
||
| 1770 | virtual void __move_to(__packaged_task_base*) _NOEXCEPT = 0; |
||
| 1771 | virtual void destroy() = 0; |
||
| 1772 | virtual void destroy_deallocate() = 0; |
||
| 1773 | virtual _Rp operator()(_ArgTypes&& ...) = 0; |
||
| 1774 | }; |
||
| 1775 | |||
| 1776 | template<class _FD, class _Alloc, class _FB> class __packaged_task_func; |
||
| 1777 | |||
| 1778 | template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> |
||
| 1779 | class __packaged_task_func<_Fp, _Alloc, _Rp(_ArgTypes...)> |
||
| 1780 | : public __packaged_task_base<_Rp(_ArgTypes...)> |
||
| 1781 | {
|
||
| 1782 | __compressed_pair<_Fp, _Alloc> __f_; |
||
| 1783 | public: |
||
| 1784 | _LIBCPP_INLINE_VISIBILITY |
||
| 1785 | explicit __packaged_task_func(const _Fp& __f) : __f_(__f) {}
|
||
| 1786 | _LIBCPP_INLINE_VISIBILITY |
||
| 1787 | explicit __packaged_task_func(_Fp&& __f) : __f_(_VSTD::move(__f)) {}
|
||
| 1788 | _LIBCPP_INLINE_VISIBILITY |
||
| 1789 | __packaged_task_func(const _Fp& __f, const _Alloc& __a) |
||
| 1790 | : __f_(__f, __a) {}
|
||
| 1791 | _LIBCPP_INLINE_VISIBILITY |
||
| 1792 | __packaged_task_func(_Fp&& __f, const _Alloc& __a) |
||
| 1793 | : __f_(_VSTD::move(__f), __a) {}
|
||
| 1794 | virtual void __move_to(__packaged_task_base<_Rp(_ArgTypes...)>*) _NOEXCEPT; |
||
| 1795 | virtual void destroy(); |
||
| 1796 | virtual void destroy_deallocate(); |
||
| 1797 | virtual _Rp operator()(_ArgTypes&& ... __args); |
||
| 1798 | }; |
||
| 1799 | |||
| 1800 | template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> |
||
| 1801 | void |
||
| 1802 | __packaged_task_func<_Fp, _Alloc, _Rp(_ArgTypes...)>::__move_to( |
||
| 1803 | __packaged_task_base<_Rp(_ArgTypes...)>* __p) _NOEXCEPT |
||
| 1804 | {
|
||
| 1805 | ::new (__p) __packaged_task_func(_VSTD::move(__f_.first()), _VSTD::move(__f_.second())); |
||
| 1806 | } |
||
| 1807 | |||
| 1808 | template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> |
||
| 1809 | void |
||
| 1810 | __packaged_task_func<_Fp, _Alloc, _Rp(_ArgTypes...)>::destroy() |
||
| 1811 | {
|
||
| 1812 | __f_.~__compressed_pair<_Fp, _Alloc>(); |
||
| 1813 | } |
||
| 1814 | |||
| 1815 | template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> |
||
| 1816 | void |
||
| 1817 | __packaged_task_func<_Fp, _Alloc, _Rp(_ArgTypes...)>::destroy_deallocate() |
||
| 1818 | {
|
||
| 1819 | typedef typename __allocator_traits_rebind<_Alloc, __packaged_task_func>::type _Ap; |
||
| 1820 | typedef allocator_traits<_Ap> _ATraits; |
||
| 1821 | typedef pointer_traits<typename _ATraits::pointer> _PTraits; |
||
| 1822 | _Ap __a(__f_.second()); |
||
| 1823 | __f_.~__compressed_pair<_Fp, _Alloc>(); |
||
| 1824 | __a.deallocate(_PTraits::pointer_to(*this), 1); |
||
| 1825 | } |
||
| 1826 | |||
| 1827 | template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> |
||
| 1828 | _Rp |
||
| 1829 | __packaged_task_func<_Fp, _Alloc, _Rp(_ArgTypes...)>::operator()(_ArgTypes&& ... __arg) |
||
| 1830 | {
|
||
| 1831 | return __invoke(__f_.first(), _VSTD::forward<_ArgTypes>(__arg)...); |
||
| 1832 | } |
||
| 1833 | |||
| 1834 | template <class _Callable> class __packaged_task_function; |
||
| 1835 | |||
| 1836 | template<class _Rp, class ..._ArgTypes> |
||
| 1837 | class __packaged_task_function<_Rp(_ArgTypes...)> |
||
| 1838 | {
|
||
| 1839 | typedef __packaged_task_base<_Rp(_ArgTypes...)> __base; |
||
| 1840 | typename aligned_storage<3*sizeof(void*)>::type __buf_; |
||
| 1841 | __base* __f_; |
||
| 1842 | |||
| 1843 | public: |
||
| 1844 | typedef _Rp result_type; |
||
| 1845 | |||
| 1846 | // construct/copy/destroy: |
||
| 1847 | _LIBCPP_INLINE_VISIBILITY |
||
| 1848 | __packaged_task_function() _NOEXCEPT : __f_(nullptr) {}
|
||
| 1849 | template<class _Fp> |
||
| 1850 | __packaged_task_function(_Fp&& __f); |
||
| 1851 | template<class _Fp, class _Alloc> |
||
| 1852 | __packaged_task_function(allocator_arg_t, const _Alloc& __a, _Fp&& __f); |
||
| 1853 | |||
| 1854 | __packaged_task_function(__packaged_task_function&&) _NOEXCEPT; |
||
| 1855 | __packaged_task_function& operator=(__packaged_task_function&&) _NOEXCEPT; |
||
| 1856 | |||
| 1857 | __packaged_task_function(const __packaged_task_function&) = delete; |
||
| 1858 | __packaged_task_function& operator=(const __packaged_task_function&) = delete; |
||
| 1859 | |||
| 1860 | ~__packaged_task_function(); |
||
| 1861 | |||
| 1862 | void swap(__packaged_task_function&) _NOEXCEPT; |
||
| 1863 | |||
| 1864 | _Rp operator()(_ArgTypes...) const; |
||
| 1865 | }; |
||
| 1866 | |||
| 1867 | template<class _Rp, class ..._ArgTypes> |
||
| 1868 | __packaged_task_function<_Rp(_ArgTypes...)>::__packaged_task_function(__packaged_task_function&& __f) _NOEXCEPT |
||
| 1869 | {
|
||
| 1870 | if (__f.__f_ == nullptr) |
||
| 1871 | __f_ = nullptr; |
||
| 1872 | else if (__f.__f_ == (__base*)&__f.__buf_) |
||
| 1873 | {
|
||
| 1874 | __f_ = (__base*)&__buf_; |
||
| 1875 | __f.__f_->__move_to(__f_); |
||
| 1876 | } |
||
| 1877 | else |
||
| 1878 | {
|
||
| 1879 | __f_ = __f.__f_; |
||
| 1880 | __f.__f_ = nullptr; |
||
| 1881 | } |
||
| 1882 | } |
||
| 1883 | |||
| 1884 | template<class _Rp, class ..._ArgTypes> |
||
| 1885 | template <class _Fp> |
||
| 1886 | __packaged_task_function<_Rp(_ArgTypes...)>::__packaged_task_function(_Fp&& __f) |
||
| 1887 | : __f_(nullptr) |
||
| 1888 | {
|
||
| 1889 | typedef typename remove_reference<typename decay<_Fp>::type>::type _FR; |
||
| 1890 | typedef __packaged_task_func<_FR, allocator<_FR>, _Rp(_ArgTypes...)> _FF; |
||
| 1891 | if (sizeof(_FF) <= sizeof(__buf_)) |
||
| 1892 | {
|
||
| 1893 | __f_ = (__base*)&__buf_; |
||
| 1894 | ::new (__f_) _FF(_VSTD::forward<_Fp>(__f)); |
||
| 1895 | } |
||
| 1896 | else |
||
| 1897 | {
|
||
| 1898 | typedef allocator<_FF> _Ap; |
||
| 1899 | _Ap __a; |
||
| 1900 | typedef __allocator_destructor<_Ap> _Dp; |
||
| 1901 | unique_ptr<__base, _Dp> __hold(__a.allocate(1), _Dp(__a, 1)); |
||
| 1902 | ::new (__hold.get()) _FF(_VSTD::forward<_Fp>(__f), allocator<_FR>(__a)); |
||
| 1903 | __f_ = __hold.release(); |
||
| 1904 | } |
||
| 1905 | } |
||
| 1906 | |||
| 1907 | template<class _Rp, class ..._ArgTypes> |
||
| 1908 | template <class _Fp, class _Alloc> |
||
| 1909 | __packaged_task_function<_Rp(_ArgTypes...)>::__packaged_task_function( |
||
| 1910 | allocator_arg_t, const _Alloc& __a0, _Fp&& __f) |
||
| 1911 | : __f_(nullptr) |
||
| 1912 | {
|
||
| 1913 | typedef typename remove_reference<typename decay<_Fp>::type>::type _FR; |
||
| 1914 | typedef __packaged_task_func<_FR, _Alloc, _Rp(_ArgTypes...)> _FF; |
||
| 1915 | if (sizeof(_FF) <= sizeof(__buf_)) |
||
| 1916 | {
|
||
| 1917 | __f_ = (__base*)&__buf_; |
||
| 1918 | ::new (__f_) _FF(_VSTD::forward<_Fp>(__f)); |
||
| 1919 | } |
||
| 1920 | else |
||
| 1921 | {
|
||
| 1922 | typedef typename __allocator_traits_rebind<_Alloc, _FF>::type _Ap; |
||
| 1923 | _Ap __a(__a0); |
||
| 1924 | typedef __allocator_destructor<_Ap> _Dp; |
||
| 1925 | unique_ptr<__base, _Dp> __hold(__a.allocate(1), _Dp(__a, 1)); |
||
| 1926 | ::new (static_cast<void*>(_VSTD::addressof(*__hold.get()))) |
||
| 1927 | _FF(_VSTD::forward<_Fp>(__f), _Alloc(__a)); |
||
| 1928 | __f_ = _VSTD::addressof(*__hold.release()); |
||
| 1929 | } |
||
| 1930 | } |
||
| 1931 | |||
| 1932 | template<class _Rp, class ..._ArgTypes> |
||
| 1933 | __packaged_task_function<_Rp(_ArgTypes...)>& |
||
| 1934 | __packaged_task_function<_Rp(_ArgTypes...)>::operator=(__packaged_task_function&& __f) _NOEXCEPT |
||
| 1935 | {
|
||
| 1936 | if (__f_ == (__base*)&__buf_) |
||
| 1937 | __f_->destroy(); |
||
| 1938 | else if (__f_) |
||
| 1939 | __f_->destroy_deallocate(); |
||
| 1940 | __f_ = nullptr; |
||
| 1941 | if (__f.__f_ == nullptr) |
||
| 1942 | __f_ = nullptr; |
||
| 1943 | else if (__f.__f_ == (__base*)&__f.__buf_) |
||
| 1944 | {
|
||
| 1945 | __f_ = (__base*)&__buf_; |
||
| 1946 | __f.__f_->__move_to(__f_); |
||
| 1947 | } |
||
| 1948 | else |
||
| 1949 | {
|
||
| 1950 | __f_ = __f.__f_; |
||
| 1951 | __f.__f_ = nullptr; |
||
| 1952 | } |
||
| 1953 | return *this; |
||
| 1954 | } |
||
| 1955 | |||
| 1956 | template<class _Rp, class ..._ArgTypes> |
||
| 1957 | __packaged_task_function<_Rp(_ArgTypes...)>::~__packaged_task_function() |
||
| 1958 | {
|
||
| 1959 | if (__f_ == (__base*)&__buf_) |
||
| 1960 | __f_->destroy(); |
||
| 1961 | else if (__f_) |
||
| 1962 | __f_->destroy_deallocate(); |
||
| 1963 | } |
||
| 1964 | |||
| 1965 | template<class _Rp, class ..._ArgTypes> |
||
| 1966 | void |
||
| 1967 | __packaged_task_function<_Rp(_ArgTypes...)>::swap(__packaged_task_function& __f) _NOEXCEPT |
||
| 1968 | {
|
||
| 1969 | if (__f_ == (__base*)&__buf_ && __f.__f_ == (__base*)&__f.__buf_) |
||
| 1970 | {
|
||
| 1971 | typename aligned_storage<sizeof(__buf_)>::type __tempbuf; |
||
| 1972 | __base* __t = (__base*)&__tempbuf; |
||
| 1973 | __f_->__move_to(__t); |
||
| 1974 | __f_->destroy(); |
||
| 1975 | __f_ = nullptr; |
||
| 1976 | __f.__f_->__move_to((__base*)&__buf_); |
||
| 1977 | __f.__f_->destroy(); |
||
| 1978 | __f.__f_ = nullptr; |
||
| 1979 | __f_ = (__base*)&__buf_; |
||
| 1980 | __t->__move_to((__base*)&__f.__buf_); |
||
| 1981 | __t->destroy(); |
||
| 1982 | __f.__f_ = (__base*)&__f.__buf_; |
||
| 1983 | } |
||
| 1984 | else if (__f_ == (__base*)&__buf_) |
||
| 1985 | {
|
||
| 1986 | __f_->__move_to((__base*)&__f.__buf_); |
||
| 1987 | __f_->destroy(); |
||
| 1988 | __f_ = __f.__f_; |
||
| 1989 | __f.__f_ = (__base*)&__f.__buf_; |
||
| 1990 | } |
||
| 1991 | else if (__f.__f_ == (__base*)&__f.__buf_) |
||
| 1992 | {
|
||
| 1993 | __f.__f_->__move_to((__base*)&__buf_); |
||
| 1994 | __f.__f_->destroy(); |
||
| 1995 | __f.__f_ = __f_; |
||
| 1996 | __f_ = (__base*)&__buf_; |
||
| 1997 | } |
||
| 1998 | else |
||
| 1999 | _VSTD::swap(__f_, __f.__f_); |
||
| 2000 | } |
||
| 2001 | |||
| 2002 | template<class _Rp, class ..._ArgTypes> |
||
| 2003 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 2004 | _Rp |
||
| 2005 | __packaged_task_function<_Rp(_ArgTypes...)>::operator()(_ArgTypes... __arg) const |
||
| 2006 | {
|
||
| 2007 | return (*__f_)(_VSTD::forward<_ArgTypes>(__arg)...); |
||
| 2008 | } |
||
| 2009 | |||
| 2010 | template<class _Rp, class ..._ArgTypes> |
||
| 2011 | class _LIBCPP_TYPE_VIS_ONLY packaged_task<_Rp(_ArgTypes...)> |
||
| 2012 | {
|
||
| 2013 | public: |
||
| 2014 | typedef _Rp result_type; |
||
| 2015 | |||
| 2016 | private: |
||
| 2017 | __packaged_task_function<result_type(_ArgTypes...)> __f_; |
||
| 2018 | promise<result_type> __p_; |
||
| 2019 | |||
| 2020 | public: |
||
| 2021 | // construction and destruction |
||
| 2022 | _LIBCPP_INLINE_VISIBILITY |
||
| 2023 | packaged_task() _NOEXCEPT : __p_(nullptr) {}
|
||
| 2024 | template <class _Fp, |
||
| 2025 | class = typename enable_if |
||
| 2026 | < |
||
| 2027 | !is_same< |
||
| 2028 | typename decay<_Fp>::type, |
||
| 2029 | packaged_task |
||
| 2030 | >::value |
||
| 2031 | >::type |
||
| 2032 | > |
||
| 2033 | _LIBCPP_INLINE_VISIBILITY |
||
| 2034 | explicit packaged_task(_Fp&& __f) : __f_(_VSTD::forward<_Fp>(__f)) {}
|
||
| 2035 | template <class _Fp, class _Allocator, |
||
| 2036 | class = typename enable_if |
||
| 2037 | < |
||
| 2038 | !is_same< |
||
| 2039 | typename decay<_Fp>::type, |
||
| 2040 | packaged_task |
||
| 2041 | >::value |
||
| 2042 | >::type |
||
| 2043 | > |
||
| 2044 | _LIBCPP_INLINE_VISIBILITY |
||
| 2045 | packaged_task(allocator_arg_t, const _Allocator& __a, _Fp&& __f) |
||
| 2046 | : __f_(allocator_arg, __a, _VSTD::forward<_Fp>(__f)), |
||
| 2047 | __p_(allocator_arg, __a) {}
|
||
| 2048 | // ~packaged_task() = default; |
||
| 2049 | |||
| 2050 | // no copy |
||
| 2051 | packaged_task(const packaged_task&) = delete; |
||
| 2052 | packaged_task& operator=(const packaged_task&) = delete; |
||
| 2053 | |||
| 2054 | // move support |
||
| 2055 | _LIBCPP_INLINE_VISIBILITY |
||
| 2056 | packaged_task(packaged_task&& __other) _NOEXCEPT |
||
| 2057 | : __f_(_VSTD::move(__other.__f_)), __p_(_VSTD::move(__other.__p_)) {}
|
||
| 2058 | _LIBCPP_INLINE_VISIBILITY |
||
| 2059 | packaged_task& operator=(packaged_task&& __other) _NOEXCEPT |
||
| 2060 | {
|
||
| 2061 | __f_ = _VSTD::move(__other.__f_); |
||
| 2062 | __p_ = _VSTD::move(__other.__p_); |
||
| 2063 | return *this; |
||
| 2064 | } |
||
| 2065 | _LIBCPP_INLINE_VISIBILITY |
||
| 2066 | void swap(packaged_task& __other) _NOEXCEPT |
||
| 2067 | {
|
||
| 2068 | __f_.swap(__other.__f_); |
||
| 2069 | __p_.swap(__other.__p_); |
||
| 2070 | } |
||
| 2071 | |||
| 2072 | _LIBCPP_INLINE_VISIBILITY |
||
| 2073 | bool valid() const _NOEXCEPT {return __p_.__state_ != nullptr;}
|
||
| 2074 | |||
| 2075 | // result retrieval |
||
| 2076 | _LIBCPP_INLINE_VISIBILITY |
||
| 2077 | future<result_type> get_future() {return __p_.get_future();}
|
||
| 2078 | |||
| 2079 | // execution |
||
| 2080 | void operator()(_ArgTypes... __args); |
||
| 2081 | void make_ready_at_thread_exit(_ArgTypes... __args); |
||
| 2082 | |||
| 2083 | void reset(); |
||
| 2084 | }; |
||
| 2085 | |||
| 2086 | template<class _Rp, class ..._ArgTypes> |
||
| 2087 | void |
||
| 2088 | packaged_task<_Rp(_ArgTypes...)>::operator()(_ArgTypes... __args) |
||
| 2089 | {
|
||
| 2090 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 2091 | if (__p_.__state_ == nullptr) |
||
| 2092 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 2093 | if (__p_.__state_->__has_value()) |
||
| 2094 | throw future_error(make_error_code(future_errc::promise_already_satisfied)); |
||
| 2095 | try |
||
| 2096 | {
|
||
| 2097 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 2098 | __p_.set_value(__f_(_VSTD::forward<_ArgTypes>(__args)...)); |
||
| 2099 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 2100 | } |
||
| 2101 | catch (...) |
||
| 2102 | {
|
||
| 2103 | __p_.set_exception(current_exception()); |
||
| 2104 | } |
||
| 2105 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 2106 | } |
||
| 2107 | |||
| 2108 | template<class _Rp, class ..._ArgTypes> |
||
| 2109 | void |
||
| 2110 | packaged_task<_Rp(_ArgTypes...)>::make_ready_at_thread_exit(_ArgTypes... __args) |
||
| 2111 | {
|
||
| 2112 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 2113 | if (__p_.__state_ == nullptr) |
||
| 2114 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 2115 | if (__p_.__state_->__has_value()) |
||
| 2116 | throw future_error(make_error_code(future_errc::promise_already_satisfied)); |
||
| 2117 | try |
||
| 2118 | {
|
||
| 2119 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 2120 | __p_.set_value_at_thread_exit(__f_(_VSTD::forward<_ArgTypes>(__args)...)); |
||
| 2121 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 2122 | } |
||
| 2123 | catch (...) |
||
| 2124 | {
|
||
| 2125 | __p_.set_exception_at_thread_exit(current_exception()); |
||
| 2126 | } |
||
| 2127 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 2128 | } |
||
| 2129 | |||
| 2130 | template<class _Rp, class ..._ArgTypes> |
||
| 2131 | void |
||
| 2132 | packaged_task<_Rp(_ArgTypes...)>::reset() |
||
| 2133 | {
|
||
| 2134 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 2135 | if (!valid()) |
||
| 2136 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 2137 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 2138 | __p_ = promise<result_type>(); |
||
| 2139 | } |
||
| 2140 | |||
| 2141 | template<class ..._ArgTypes> |
||
| 2142 | class _LIBCPP_TYPE_VIS_ONLY packaged_task<void(_ArgTypes...)> |
||
| 2143 | {
|
||
| 2144 | public: |
||
| 2145 | typedef void result_type; |
||
| 2146 | |||
| 2147 | private: |
||
| 2148 | __packaged_task_function<result_type(_ArgTypes...)> __f_; |
||
| 2149 | promise<result_type> __p_; |
||
| 2150 | |||
| 2151 | public: |
||
| 2152 | // construction and destruction |
||
| 2153 | _LIBCPP_INLINE_VISIBILITY |
||
| 2154 | packaged_task() _NOEXCEPT : __p_(nullptr) {}
|
||
| 2155 | template <class _Fp, |
||
| 2156 | class = typename enable_if |
||
| 2157 | < |
||
| 2158 | !is_same< |
||
| 2159 | typename decay<_Fp>::type, |
||
| 2160 | packaged_task |
||
| 2161 | >::value |
||
| 2162 | >::type |
||
| 2163 | > |
||
| 2164 | _LIBCPP_INLINE_VISIBILITY |
||
| 2165 | explicit packaged_task(_Fp&& __f) : __f_(_VSTD::forward<_Fp>(__f)) {}
|
||
| 2166 | template <class _Fp, class _Allocator, |
||
| 2167 | class = typename enable_if |
||
| 2168 | < |
||
| 2169 | !is_same< |
||
| 2170 | typename decay<_Fp>::type, |
||
| 2171 | packaged_task |
||
| 2172 | >::value |
||
| 2173 | >::type |
||
| 2174 | > |
||
| 2175 | _LIBCPP_INLINE_VISIBILITY |
||
| 2176 | packaged_task(allocator_arg_t, const _Allocator& __a, _Fp&& __f) |
||
| 2177 | : __f_(allocator_arg, __a, _VSTD::forward<_Fp>(__f)), |
||
| 2178 | __p_(allocator_arg, __a) {}
|
||
| 2179 | // ~packaged_task() = default; |
||
| 2180 | |||
| 2181 | // no copy |
||
| 2182 | packaged_task(const packaged_task&) = delete; |
||
| 2183 | packaged_task& operator=(const packaged_task&) = delete; |
||
| 2184 | |||
| 2185 | // move support |
||
| 2186 | _LIBCPP_INLINE_VISIBILITY |
||
| 2187 | packaged_task(packaged_task&& __other) _NOEXCEPT |
||
| 2188 | : __f_(_VSTD::move(__other.__f_)), __p_(_VSTD::move(__other.__p_)) {}
|
||
| 2189 | _LIBCPP_INLINE_VISIBILITY |
||
| 2190 | packaged_task& operator=(packaged_task&& __other) _NOEXCEPT |
||
| 2191 | {
|
||
| 2192 | __f_ = _VSTD::move(__other.__f_); |
||
| 2193 | __p_ = _VSTD::move(__other.__p_); |
||
| 2194 | return *this; |
||
| 2195 | } |
||
| 2196 | _LIBCPP_INLINE_VISIBILITY |
||
| 2197 | void swap(packaged_task& __other) _NOEXCEPT |
||
| 2198 | {
|
||
| 2199 | __f_.swap(__other.__f_); |
||
| 2200 | __p_.swap(__other.__p_); |
||
| 2201 | } |
||
| 2202 | |||
| 2203 | _LIBCPP_INLINE_VISIBILITY |
||
| 2204 | bool valid() const _NOEXCEPT {return __p_.__state_ != nullptr;}
|
||
| 2205 | |||
| 2206 | // result retrieval |
||
| 2207 | _LIBCPP_INLINE_VISIBILITY |
||
| 2208 | future<result_type> get_future() {return __p_.get_future();}
|
||
| 2209 | |||
| 2210 | // execution |
||
| 2211 | void operator()(_ArgTypes... __args); |
||
| 2212 | void make_ready_at_thread_exit(_ArgTypes... __args); |
||
| 2213 | |||
| 2214 | void reset(); |
||
| 2215 | }; |
||
| 2216 | |||
| 2217 | template<class ..._ArgTypes> |
||
| 2218 | void |
||
| 2219 | packaged_task<void(_ArgTypes...)>::operator()(_ArgTypes... __args) |
||
| 2220 | {
|
||
| 2221 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 2222 | if (__p_.__state_ == nullptr) |
||
| 2223 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 2224 | if (__p_.__state_->__has_value()) |
||
| 2225 | throw future_error(make_error_code(future_errc::promise_already_satisfied)); |
||
| 2226 | try |
||
| 2227 | {
|
||
| 2228 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 2229 | __f_(_VSTD::forward<_ArgTypes>(__args)...); |
||
| 2230 | __p_.set_value(); |
||
| 2231 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 2232 | } |
||
| 2233 | catch (...) |
||
| 2234 | {
|
||
| 2235 | __p_.set_exception(current_exception()); |
||
| 2236 | } |
||
| 2237 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 2238 | } |
||
| 2239 | |||
| 2240 | template<class ..._ArgTypes> |
||
| 2241 | void |
||
| 2242 | packaged_task<void(_ArgTypes...)>::make_ready_at_thread_exit(_ArgTypes... __args) |
||
| 2243 | {
|
||
| 2244 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 2245 | if (__p_.__state_ == nullptr) |
||
| 2246 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 2247 | if (__p_.__state_->__has_value()) |
||
| 2248 | throw future_error(make_error_code(future_errc::promise_already_satisfied)); |
||
| 2249 | try |
||
| 2250 | {
|
||
| 2251 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 2252 | __f_(_VSTD::forward<_ArgTypes>(__args)...); |
||
| 2253 | __p_.set_value_at_thread_exit(); |
||
| 2254 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 2255 | } |
||
| 2256 | catch (...) |
||
| 2257 | {
|
||
| 2258 | __p_.set_exception_at_thread_exit(current_exception()); |
||
| 2259 | } |
||
| 2260 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 2261 | } |
||
| 2262 | |||
| 2263 | template<class ..._ArgTypes> |
||
| 2264 | void |
||
| 2265 | packaged_task<void(_ArgTypes...)>::reset() |
||
| 2266 | {
|
||
| 2267 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 2268 | if (!valid()) |
||
| 2269 | throw future_error(make_error_code(future_errc::no_state)); |
||
| 2270 | #endif // _LIBCPP_NO_EXCEPTIONS |
||
| 2271 | __p_ = promise<result_type>(); |
||
| 2272 | } |
||
| 2273 | |||
| 2274 | template <class _Callable> |
||
| 2275 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 2276 | void |
||
| 2277 | swap(packaged_task<_Callable>& __x, packaged_task<_Callable>& __y) _NOEXCEPT |
||
| 2278 | {
|
||
| 2279 | __x.swap(__y); |
||
| 2280 | } |
||
| 2281 | |||
| 2282 | template <class _Callable, class _Alloc> |
||
| 2283 | struct _LIBCPP_TYPE_VIS_ONLY uses_allocator<packaged_task<_Callable>, _Alloc> |
||
| 2284 | : public true_type {};
|
||
| 2285 | |||
| 2286 | template <class _Rp, class _Fp> |
||
| 2287 | future<_Rp> |
||
| 2288 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2289 | __make_deferred_assoc_state(_Fp&& __f) |
||
| 2290 | #else |
||
| 2291 | __make_deferred_assoc_state(_Fp __f) |
||
| 2292 | #endif |
||
| 2293 | {
|
||
| 2294 | unique_ptr<__deferred_assoc_state<_Rp, _Fp>, __release_shared_count> |
||
| 2295 | __h(new __deferred_assoc_state<_Rp, _Fp>(_VSTD::forward<_Fp>(__f))); |
||
| 2296 | return future<_Rp>(__h.get()); |
||
| 2297 | } |
||
| 2298 | |||
| 2299 | template <class _Rp, class _Fp> |
||
| 2300 | future<_Rp> |
||
| 2301 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2302 | __make_async_assoc_state(_Fp&& __f) |
||
| 2303 | #else |
||
| 2304 | __make_async_assoc_state(_Fp __f) |
||
| 2305 | #endif |
||
| 2306 | {
|
||
| 2307 | unique_ptr<__async_assoc_state<_Rp, _Fp>, __release_shared_count> |
||
| 2308 | __h(new __async_assoc_state<_Rp, _Fp>(_VSTD::forward<_Fp>(__f))); |
||
| 2309 | _VSTD::thread(&__async_assoc_state<_Rp, _Fp>::__execute, __h.get()).detach(); |
||
| 2310 | return future<_Rp>(__h.get()); |
||
| 2311 | } |
||
| 2312 | |||
| 2313 | template <class _Fp, class... _Args> |
||
| 2314 | class __async_func |
||
| 2315 | {
|
||
| 2316 | tuple<_Fp, _Args...> __f_; |
||
| 2317 | |||
| 2318 | public: |
||
| 2319 | typedef typename __invoke_of<_Fp, _Args...>::type _Rp; |
||
| 2320 | |||
| 2321 | _LIBCPP_INLINE_VISIBILITY |
||
| 2322 | explicit __async_func(_Fp&& __f, _Args&&... __args) |
||
| 2323 | : __f_(_VSTD::move(__f), _VSTD::move(__args)...) {}
|
||
| 2324 | |||
| 2325 | _LIBCPP_INLINE_VISIBILITY |
||
| 2326 | __async_func(__async_func&& __f) : __f_(_VSTD::move(__f.__f_)) {}
|
||
| 2327 | |||
| 2328 | _Rp operator()() |
||
| 2329 | {
|
||
| 2330 | typedef typename __make_tuple_indices<1+sizeof...(_Args), 1>::type _Index; |
||
| 2331 | return __execute(_Index()); |
||
| 2332 | } |
||
| 2333 | private: |
||
| 2334 | template <size_t ..._Indices> |
||
| 2335 | _Rp |
||
| 2336 | __execute(__tuple_indices<_Indices...>) |
||
| 2337 | {
|
||
| 2338 | return __invoke(_VSTD::move(_VSTD::get<0>(__f_)), _VSTD::move(_VSTD::get<_Indices>(__f_))...); |
||
| 2339 | } |
||
| 2340 | }; |
||
| 2341 | |||
| 2342 | inline _LIBCPP_INLINE_VISIBILITY bool __does_policy_contain(launch __policy, launch __value ) |
||
| 2343 | { return (int(__policy) & int(__value)) != 0; }
|
||
| 2344 | |||
| 2345 | template <class _Fp, class... _Args> |
||
| 2346 | future<typename __invoke_of<typename decay<_Fp>::type, typename decay<_Args>::type...>::type> |
||
| 2347 | async(launch __policy, _Fp&& __f, _Args&&... __args) |
||
| 2348 | {
|
||
| 2349 | typedef __async_func<typename decay<_Fp>::type, typename decay<_Args>::type...> _BF; |
||
| 2350 | typedef typename _BF::_Rp _Rp; |
||
| 2351 | |||
| 2352 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 2353 | try |
||
| 2354 | {
|
||
| 2355 | #endif |
||
| 2356 | if (__does_policy_contain(__policy, launch::async)) |
||
| 2357 | return _VSTD::__make_async_assoc_state<_Rp>(_BF(__decay_copy(_VSTD::forward<_Fp>(__f)), |
||
| 2358 | __decay_copy(_VSTD::forward<_Args>(__args))...)); |
||
| 2359 | #ifndef _LIBCPP_NO_EXCEPTIONS |
||
| 2360 | } |
||
| 2361 | catch ( ... ) { if (__policy == launch::async) throw ; }
|
||
| 2362 | #endif |
||
| 2363 | |||
| 2364 | if (__does_policy_contain(__policy, launch::deferred)) |
||
| 2365 | return _VSTD::__make_deferred_assoc_state<_Rp>(_BF(__decay_copy(_VSTD::forward<_Fp>(__f)), |
||
| 2366 | __decay_copy(_VSTD::forward<_Args>(__args))...)); |
||
| 2367 | return future<_Rp>{};
|
||
| 2368 | } |
||
| 2369 | |||
| 2370 | template <class _Fp, class... _Args> |
||
| 2371 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 2372 | future<typename __invoke_of<typename decay<_Fp>::type, typename decay<_Args>::type...>::type> |
||
| 2373 | async(_Fp&& __f, _Args&&... __args) |
||
| 2374 | {
|
||
| 2375 | return _VSTD::async(launch::any, _VSTD::forward<_Fp>(__f), |
||
| 2376 | _VSTD::forward<_Args>(__args)...); |
||
| 2377 | } |
||
| 2378 | |||
| 2379 | #endif // _LIBCPP_HAS_NO_VARIADICS |
||
| 2380 | |||
| 2381 | // shared_future |
||
| 2382 | |||
| 2383 | template <class _Rp> |
||
| 2384 | class _LIBCPP_TYPE_VIS_ONLY shared_future |
||
| 2385 | {
|
||
| 2386 | __assoc_state<_Rp>* __state_; |
||
| 2387 | |||
| 2388 | public: |
||
| 2389 | _LIBCPP_INLINE_VISIBILITY |
||
| 2390 | shared_future() _NOEXCEPT : __state_(nullptr) {}
|
||
| 2391 | _LIBCPP_INLINE_VISIBILITY |
||
| 2392 | shared_future(const shared_future& __rhs) : __state_(__rhs.__state_) |
||
| 2393 | {if (__state_) __state_->__add_shared();}
|
||
| 2394 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2395 | _LIBCPP_INLINE_VISIBILITY |
||
| 2396 | shared_future(future<_Rp>&& __f) _NOEXCEPT : __state_(__f.__state_) |
||
| 2397 | {__f.__state_ = nullptr;}
|
||
| 2398 | _LIBCPP_INLINE_VISIBILITY |
||
| 2399 | shared_future(shared_future&& __rhs) _NOEXCEPT : __state_(__rhs.__state_) |
||
| 2400 | {__rhs.__state_ = nullptr;}
|
||
| 2401 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2402 | ~shared_future(); |
||
| 2403 | shared_future& operator=(const shared_future& __rhs); |
||
| 2404 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2405 | _LIBCPP_INLINE_VISIBILITY |
||
| 2406 | shared_future& operator=(shared_future&& __rhs) _NOEXCEPT |
||
| 2407 | {
|
||
| 2408 | shared_future(std::move(__rhs)).swap(*this); |
||
| 2409 | return *this; |
||
| 2410 | } |
||
| 2411 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2412 | |||
| 2413 | // retrieving the value |
||
| 2414 | _LIBCPP_INLINE_VISIBILITY |
||
| 2415 | const _Rp& get() const {return __state_->copy();}
|
||
| 2416 | |||
| 2417 | _LIBCPP_INLINE_VISIBILITY |
||
| 2418 | void swap(shared_future& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
||
| 2419 | |||
| 2420 | // functions to check state |
||
| 2421 | _LIBCPP_INLINE_VISIBILITY |
||
| 2422 | bool valid() const _NOEXCEPT {return __state_ != nullptr;}
|
||
| 2423 | |||
| 2424 | _LIBCPP_INLINE_VISIBILITY |
||
| 2425 | void wait() const {__state_->wait();}
|
||
| 2426 | template <class _Rep, class _Period> |
||
| 2427 | _LIBCPP_INLINE_VISIBILITY |
||
| 2428 | future_status |
||
| 2429 | wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const |
||
| 2430 | {return __state_->wait_for(__rel_time);}
|
||
| 2431 | template <class _Clock, class _Duration> |
||
| 2432 | _LIBCPP_INLINE_VISIBILITY |
||
| 2433 | future_status |
||
| 2434 | wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const |
||
| 2435 | {return __state_->wait_until(__abs_time);}
|
||
| 2436 | }; |
||
| 2437 | |||
| 2438 | template <class _Rp> |
||
| 2439 | shared_future<_Rp>::~shared_future() |
||
| 2440 | {
|
||
| 2441 | if (__state_) |
||
| 2442 | __state_->__release_shared(); |
||
| 2443 | } |
||
| 2444 | |||
| 2445 | template <class _Rp> |
||
| 2446 | shared_future<_Rp>& |
||
| 2447 | shared_future<_Rp>::operator=(const shared_future& __rhs) |
||
| 2448 | {
|
||
| 2449 | if (__rhs.__state_) |
||
| 2450 | __rhs.__state_->__add_shared(); |
||
| 2451 | if (__state_) |
||
| 2452 | __state_->__release_shared(); |
||
| 2453 | __state_ = __rhs.__state_; |
||
| 2454 | return *this; |
||
| 2455 | } |
||
| 2456 | |||
| 2457 | template <class _Rp> |
||
| 2458 | class _LIBCPP_TYPE_VIS_ONLY shared_future<_Rp&> |
||
| 2459 | {
|
||
| 2460 | __assoc_state<_Rp&>* __state_; |
||
| 2461 | |||
| 2462 | public: |
||
| 2463 | _LIBCPP_INLINE_VISIBILITY |
||
| 2464 | shared_future() _NOEXCEPT : __state_(nullptr) {}
|
||
| 2465 | _LIBCPP_INLINE_VISIBILITY |
||
| 2466 | shared_future(const shared_future& __rhs) : __state_(__rhs.__state_) |
||
| 2467 | {if (__state_) __state_->__add_shared();}
|
||
| 2468 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2469 | _LIBCPP_INLINE_VISIBILITY |
||
| 2470 | shared_future(future<_Rp&>&& __f) _NOEXCEPT : __state_(__f.__state_) |
||
| 2471 | {__f.__state_ = nullptr;}
|
||
| 2472 | _LIBCPP_INLINE_VISIBILITY |
||
| 2473 | shared_future(shared_future&& __rhs) _NOEXCEPT : __state_(__rhs.__state_) |
||
| 2474 | {__rhs.__state_ = nullptr;}
|
||
| 2475 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2476 | ~shared_future(); |
||
| 2477 | shared_future& operator=(const shared_future& __rhs); |
||
| 2478 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2479 | _LIBCPP_INLINE_VISIBILITY |
||
| 2480 | shared_future& operator=(shared_future&& __rhs) _NOEXCEPT |
||
| 2481 | {
|
||
| 2482 | shared_future(std::move(__rhs)).swap(*this); |
||
| 2483 | return *this; |
||
| 2484 | } |
||
| 2485 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2486 | |||
| 2487 | // retrieving the value |
||
| 2488 | _LIBCPP_INLINE_VISIBILITY |
||
| 2489 | _Rp& get() const {return __state_->copy();}
|
||
| 2490 | |||
| 2491 | _LIBCPP_INLINE_VISIBILITY |
||
| 2492 | void swap(shared_future& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
||
| 2493 | |||
| 2494 | // functions to check state |
||
| 2495 | _LIBCPP_INLINE_VISIBILITY |
||
| 2496 | bool valid() const _NOEXCEPT {return __state_ != nullptr;}
|
||
| 2497 | |||
| 2498 | _LIBCPP_INLINE_VISIBILITY |
||
| 2499 | void wait() const {__state_->wait();}
|
||
| 2500 | template <class _Rep, class _Period> |
||
| 2501 | _LIBCPP_INLINE_VISIBILITY |
||
| 2502 | future_status |
||
| 2503 | wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const |
||
| 2504 | {return __state_->wait_for(__rel_time);}
|
||
| 2505 | template <class _Clock, class _Duration> |
||
| 2506 | _LIBCPP_INLINE_VISIBILITY |
||
| 2507 | future_status |
||
| 2508 | wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const |
||
| 2509 | {return __state_->wait_until(__abs_time);}
|
||
| 2510 | }; |
||
| 2511 | |||
| 2512 | template <class _Rp> |
||
| 2513 | shared_future<_Rp&>::~shared_future() |
||
| 2514 | {
|
||
| 2515 | if (__state_) |
||
| 2516 | __state_->__release_shared(); |
||
| 2517 | } |
||
| 2518 | |||
| 2519 | template <class _Rp> |
||
| 2520 | shared_future<_Rp&>& |
||
| 2521 | shared_future<_Rp&>::operator=(const shared_future& __rhs) |
||
| 2522 | {
|
||
| 2523 | if (__rhs.__state_) |
||
| 2524 | __rhs.__state_->__add_shared(); |
||
| 2525 | if (__state_) |
||
| 2526 | __state_->__release_shared(); |
||
| 2527 | __state_ = __rhs.__state_; |
||
| 2528 | return *this; |
||
| 2529 | } |
||
| 2530 | |||
| 2531 | template <> |
||
| 2532 | class _LIBCPP_TYPE_VIS shared_future<void> |
||
| 2533 | {
|
||
| 2534 | __assoc_sub_state* __state_; |
||
| 2535 | |||
| 2536 | public: |
||
| 2537 | _LIBCPP_INLINE_VISIBILITY |
||
| 2538 | shared_future() _NOEXCEPT : __state_(nullptr) {}
|
||
| 2539 | _LIBCPP_INLINE_VISIBILITY |
||
| 2540 | shared_future(const shared_future& __rhs) : __state_(__rhs.__state_) |
||
| 2541 | {if (__state_) __state_->__add_shared();}
|
||
| 2542 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2543 | _LIBCPP_INLINE_VISIBILITY |
||
| 2544 | shared_future(future<void>&& __f) _NOEXCEPT : __state_(__f.__state_) |
||
| 2545 | {__f.__state_ = nullptr;}
|
||
| 2546 | _LIBCPP_INLINE_VISIBILITY |
||
| 2547 | shared_future(shared_future&& __rhs) _NOEXCEPT : __state_(__rhs.__state_) |
||
| 2548 | {__rhs.__state_ = nullptr;}
|
||
| 2549 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2550 | ~shared_future(); |
||
| 2551 | shared_future& operator=(const shared_future& __rhs); |
||
| 2552 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2553 | _LIBCPP_INLINE_VISIBILITY |
||
| 2554 | shared_future& operator=(shared_future&& __rhs) _NOEXCEPT |
||
| 2555 | {
|
||
| 2556 | shared_future(std::move(__rhs)).swap(*this); |
||
| 2557 | return *this; |
||
| 2558 | } |
||
| 2559 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2560 | |||
| 2561 | // retrieving the value |
||
| 2562 | _LIBCPP_INLINE_VISIBILITY |
||
| 2563 | void get() const {__state_->copy();}
|
||
| 2564 | |||
| 2565 | _LIBCPP_INLINE_VISIBILITY |
||
| 2566 | void swap(shared_future& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
||
| 2567 | |||
| 2568 | // functions to check state |
||
| 2569 | _LIBCPP_INLINE_VISIBILITY |
||
| 2570 | bool valid() const _NOEXCEPT {return __state_ != nullptr;}
|
||
| 2571 | |||
| 2572 | _LIBCPP_INLINE_VISIBILITY |
||
| 2573 | void wait() const {__state_->wait();}
|
||
| 2574 | template <class _Rep, class _Period> |
||
| 2575 | _LIBCPP_INLINE_VISIBILITY |
||
| 2576 | future_status |
||
| 2577 | wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const |
||
| 2578 | {return __state_->wait_for(__rel_time);}
|
||
| 2579 | template <class _Clock, class _Duration> |
||
| 2580 | _LIBCPP_INLINE_VISIBILITY |
||
| 2581 | future_status |
||
| 2582 | wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const |
||
| 2583 | {return __state_->wait_until(__abs_time);}
|
||
| 2584 | }; |
||
| 2585 | |||
| 2586 | template <class _Rp> |
||
| 2587 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 2588 | void |
||
| 2589 | swap(shared_future<_Rp>& __x, shared_future<_Rp>& __y) _NOEXCEPT |
||
| 2590 | {
|
||
| 2591 | __x.swap(__y); |
||
| 2592 | } |
||
| 2593 | |||
| 2594 | template <class _Rp> |
||
| 2595 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 2596 | shared_future<_Rp> |
||
| 2597 | future<_Rp>::share() |
||
| 2598 | {
|
||
| 2599 | return shared_future<_Rp>(_VSTD::move(*this)); |
||
| 2600 | } |
||
| 2601 | |||
| 2602 | template <class _Rp> |
||
| 2603 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 2604 | shared_future<_Rp&> |
||
| 2605 | future<_Rp&>::share() |
||
| 2606 | {
|
||
| 2607 | return shared_future<_Rp&>(_VSTD::move(*this)); |
||
| 2608 | } |
||
| 2609 | |||
| 2610 | #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2611 | |||
| 2612 | inline _LIBCPP_INLINE_VISIBILITY |
||
| 2613 | shared_future<void> |
||
| 2614 | future<void>::share() |
||
| 2615 | {
|
||
| 2616 | return shared_future<void>(_VSTD::move(*this)); |
||
| 2617 | } |
||
| 2618 | |||
| 2619 | #endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES |
||
| 2620 | |||
| 2621 | _LIBCPP_END_NAMESPACE_STD |
||
| 2622 | |||
| 2623 | #endif // !_LIBCPP_HAS_NO_THREADS |
||
| 2624 | |||
| 2625 | #endif // _LIBCPP_FUTURE |