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// -*- C++ -*- |
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//===--------------------------- future -----------------------------------===// |
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// |
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// The LLVM Compiler Infrastructure |
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// |
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// This file is dual licensed under the MIT and the University of Illinois Open |
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// Source Licenses. See LICENSE.TXT for details. |
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// |
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//===----------------------------------------------------------------------===// |
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|
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#ifndef _LIBCPP_FUTURE |
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#define _LIBCPP_FUTURE |
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|
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/* |
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future synopsis |
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|
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namespace std |
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{
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|
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enum class future_errc |
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{
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future_already_retrieved = 1, |
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promise_already_satisfied, |
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no_state, |
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broken_promise |
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}; |
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|
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enum class launch |
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{
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async = 1, |
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deferred = 2, |
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any = async | deferred |
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}; |
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|
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enum class future_status |
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{
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ready, |
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timeout, |
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deferred |
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}; |
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|
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template <> struct is_error_code_enum<future_errc> : public true_type { };
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error_code make_error_code(future_errc e) noexcept; |
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error_condition make_error_condition(future_errc e) noexcept; |
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|
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const error_category& future_category() noexcept; |
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|
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class future_error |
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: public logic_error |
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{
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public: |
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future_error(error_code ec); // exposition only |
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|
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const error_code& code() const noexcept; |
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const char* what() const noexcept; |
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}; |
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|
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template <class R> |
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class promise |
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{
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public: |
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promise(); |
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template <class Allocator> |
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promise(allocator_arg_t, const Allocator& a); |
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promise(promise&& rhs) noexcept; |
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promise(const promise& rhs) = delete; |
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~promise(); |
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|
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// assignment |
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promise& operator=(promise&& rhs) noexcept; |
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promise& operator=(const promise& rhs) = delete; |
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void swap(promise& other) noexcept; |
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|
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// retrieving the result |
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future<R> get_future(); |
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|
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// setting the result |
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void set_value(const R& r); |
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void set_value(R&& r); |
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void set_exception(exception_ptr p); |
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|
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// setting the result with deferred notification |
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void set_value_at_thread_exit(const R& r); |
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void set_value_at_thread_exit(R&& r); |
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void set_exception_at_thread_exit(exception_ptr p); |
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}; |
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|
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template <class R> |
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class promise<R&> |
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{
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public: |
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promise(); |
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template <class Allocator> |
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promise(allocator_arg_t, const Allocator& a); |
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promise(promise&& rhs) noexcept; |
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promise(const promise& rhs) = delete; |
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~promise(); |
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|
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// assignment |
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promise& operator=(promise&& rhs) noexcept; |
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promise& operator=(const promise& rhs) = delete; |
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void swap(promise& other) noexcept; |
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|
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// retrieving the result |
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future<R&> get_future(); |
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|
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// setting the result |
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void set_value(R& r); |
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void set_exception(exception_ptr p); |
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|
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// setting the result with deferred notification |
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void set_value_at_thread_exit(R&); |
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void set_exception_at_thread_exit(exception_ptr p); |
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}; |
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|
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template <> |
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class promise<void> |
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{
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public: |
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promise(); |
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template <class Allocator> |
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promise(allocator_arg_t, const Allocator& a); |
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promise(promise&& rhs) noexcept; |
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promise(const promise& rhs) = delete; |
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~promise(); |
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|
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// assignment |
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promise& operator=(promise&& rhs) noexcept; |
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promise& operator=(const promise& rhs) = delete; |
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void swap(promise& other) noexcept; |
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|
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// retrieving the result |
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future<void> get_future(); |
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|
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// setting the result |
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void set_value(); |
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void set_exception(exception_ptr p); |
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// setting the result with deferred notification |
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void set_value_at_thread_exit(); |
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void set_exception_at_thread_exit(exception_ptr p); |
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}; |
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template <class R> void swap(promise<R>& x, promise<R>& y) noexcept; |
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template <class R, class Alloc> |
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struct uses_allocator<promise<R>, Alloc> : public true_type {};
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template <class R> |
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class future |
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{
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public: |
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future() noexcept; |
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future(future&&) noexcept; |
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future(const future& rhs) = delete; |
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~future(); |
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future& operator=(const future& rhs) = delete; |
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future& operator=(future&&) noexcept; |
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shared_future<R> share(); |
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|
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// retrieving the value |
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R get(); |
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|
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// functions to check state |
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bool valid() const noexcept; |
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|
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void wait() const; |
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template <class Rep, class Period> |
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future_status |
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wait_for(const chrono::duration<Rep, Period>& rel_time) const; |
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template <class Clock, class Duration> |
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future_status |
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wait_until(const chrono::time_point<Clock, Duration>& abs_time) const; |
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}; |
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template <class R> |
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class future<R&> |
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{
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public: |
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future() noexcept; |
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future(future&&) noexcept; |
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future(const future& rhs) = delete; |
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~future(); |
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future& operator=(const future& rhs) = delete; |
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future& operator=(future&&) noexcept; |
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shared_future<R&> share(); |
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|
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// retrieving the value |
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R& get(); |
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// functions to check state |
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bool valid() const noexcept; |
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void wait() const; |
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template <class Rep, class Period> |
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future_status |
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wait_for(const chrono::duration<Rep, Period>& rel_time) const; |
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template <class Clock, class Duration> |
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future_status |
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wait_until(const chrono::time_point<Clock, Duration>& abs_time) const; |
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}; |
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template <> |
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class future<void> |
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{
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public: |
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future() noexcept; |
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future(future&&) noexcept; |
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future(const future& rhs) = delete; |
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~future(); |
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future& operator=(const future& rhs) = delete; |
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future& operator=(future&&) noexcept; |
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shared_future<void> share(); |
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|
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// retrieving the value |
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void get(); |
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// functions to check state |
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bool valid() const noexcept; |
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|
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void wait() const; |
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template <class Rep, class Period> |
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future_status |
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wait_for(const chrono::duration<Rep, Period>& rel_time) const; |
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template <class Clock, class Duration> |
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future_status |
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wait_until(const chrono::time_point<Clock, Duration>& abs_time) const; |
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}; |
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template <class R> |
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class shared_future |
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{
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public: |
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shared_future() noexcept; |
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shared_future(const shared_future& rhs); |
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shared_future(future<R>&&) noexcept; |
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shared_future(shared_future&& rhs) noexcept; |
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~shared_future(); |
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shared_future& operator=(const shared_future& rhs); |
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shared_future& operator=(shared_future&& rhs) noexcept; |
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// retrieving the value |
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const R& get() const; |
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// functions to check state |
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bool valid() const noexcept; |
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void wait() const; |
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template <class Rep, class Period> |
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future_status |
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wait_for(const chrono::duration<Rep, Period>& rel_time) const; |
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template <class Clock, class Duration> |
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future_status |
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wait_until(const chrono::time_point<Clock, Duration>& abs_time) const; |
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}; |
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template <class R> |
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class shared_future<R&> |
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{
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public: |
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shared_future() noexcept; |
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shared_future(const shared_future& rhs); |
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shared_future(future<R&>&&) noexcept; |
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shared_future(shared_future&& rhs) noexcept; |
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~shared_future(); |
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shared_future& operator=(const shared_future& rhs); |
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shared_future& operator=(shared_future&& rhs) noexcept; |
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// retrieving the value |
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R& get() const; |
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// functions to check state |
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bool valid() const noexcept; |
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void wait() const; |
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template <class Rep, class Period> |
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future_status |
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wait_for(const chrono::duration<Rep, Period>& rel_time) const; |
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template <class Clock, class Duration> |
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future_status |
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wait_until(const chrono::time_point<Clock, Duration>& abs_time) const; |
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}; |
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template <> |
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class shared_future<void> |
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{
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public: |
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shared_future() noexcept; |
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shared_future(const shared_future& rhs); |
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shared_future(future<void>&&) noexcept; |
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shared_future(shared_future&& rhs) noexcept; |
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~shared_future(); |
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shared_future& operator=(const shared_future& rhs); |
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shared_future& operator=(shared_future&& rhs) noexcept; |
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// retrieving the value |
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void get() const; |
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// functions to check state |
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bool valid() const noexcept; |
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void wait() const; |
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template <class Rep, class Period> |
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future_status |
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wait_for(const chrono::duration<Rep, Period>& rel_time) const; |
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template <class Clock, class Duration> |
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future_status |
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wait_until(const chrono::time_point<Clock, Duration>& abs_time) const; |
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}; |
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template <class F, class... Args> |
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future<typename result_of<typename decay<F>::type(typename decay<Args>::type...)>::type> |
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async(F&& f, Args&&... args); |
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template <class F, class... Args> |
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future<typename result_of<typename decay<F>::type(typename decay<Args>::type...)>::type> |
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async(launch policy, F&& f, Args&&... args); |
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template <class> class packaged_task; // undefined |
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template <class R, class... ArgTypes> |
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class packaged_task<R(ArgTypes...)> |
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{
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public: |
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typedef R result_type; |
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|
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// construction and destruction |
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packaged_task() noexcept; |
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template <class F> |
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explicit packaged_task(F&& f); |
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template <class F, class Allocator> |
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packaged_task(allocator_arg_t, const Allocator& a, F&& f); |
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~packaged_task(); |
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// no copy |
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packaged_task(const packaged_task&) = delete; |
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packaged_task& operator=(const packaged_task&) = delete; |
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// move support |
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packaged_task(packaged_task&& other) noexcept; |
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packaged_task& operator=(packaged_task&& other) noexcept; |
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void swap(packaged_task& other) noexcept; |
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bool valid() const noexcept; |
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// result retrieval |
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future<R> get_future(); |
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// execution |
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void operator()(ArgTypes... ); |
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void make_ready_at_thread_exit(ArgTypes...); |
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void reset(); |
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}; |
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template <class R> |
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void swap(packaged_task<R(ArgTypes...)&, packaged_task<R(ArgTypes...)>&) noexcept; |
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template <class R, class Alloc> struct uses_allocator<packaged_task<R>, Alloc>; |
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} // std |
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*/ |
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#include <__config> |
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#include <system_error> |
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#include <memory> |
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#include <chrono> |
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#include <exception> |
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#include <mutex> |
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#include <thread> |
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|
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
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#pragma GCC system_header |
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#endif |
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#ifdef _LIBCPP_HAS_NO_THREADS |
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#error <future> is not supported on this single threaded system |
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#else // !_LIBCPP_HAS_NO_THREADS |
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|
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_LIBCPP_BEGIN_NAMESPACE_STD |
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|
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//enum class future_errc |
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_LIBCPP_DECLARE_STRONG_ENUM(future_errc) |
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{
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future_already_retrieved = 1, |
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promise_already_satisfied, |
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no_state, |
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broken_promise |
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}; |
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_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(future_errc) |
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|
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template <> |
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struct _LIBCPP_TYPE_VIS_ONLY is_error_code_enum<future_errc> : public true_type {};
|
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|
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#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS |
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template <> |
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struct _LIBCPP_TYPE_VIS_ONLY is_error_code_enum<future_errc::__lx> : public true_type { };
|
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#endif |
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|
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//enum class launch |
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_LIBCPP_DECLARE_STRONG_ENUM(launch) |
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{
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async = 1, |
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deferred = 2, |
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any = async | deferred |
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}; |
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_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(launch) |
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|
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#ifndef _LIBCPP_HAS_NO_STRONG_ENUMS |
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|
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#ifdef _LIBCXX_UNDERLYING_TYPE |
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typedef underlying_type<launch>::type __launch_underlying_type; |
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#else |
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typedef int __launch_underlying_type; |
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#endif |
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|
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inline _LIBCPP_INLINE_VISIBILITY |
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_LIBCPP_CONSTEXPR |
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launch |
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operator&(launch __x, launch __y) |
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{
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return static_cast<launch>(static_cast<__launch_underlying_type>(__x) & |
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static_cast<__launch_underlying_type>(__y)); |
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} |
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|
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inline _LIBCPP_INLINE_VISIBILITY |
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_LIBCPP_CONSTEXPR |
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launch |
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operator|(launch __x, launch __y) |
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{
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return static_cast<launch>(static_cast<__launch_underlying_type>(__x) | |
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static_cast<__launch_underlying_type>(__y)); |
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} |
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|
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inline _LIBCPP_INLINE_VISIBILITY |
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_LIBCPP_CONSTEXPR |
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launch |
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operator^(launch __x, launch __y) |
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{
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return static_cast<launch>(static_cast<__launch_underlying_type>(__x) ^ |
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static_cast<__launch_underlying_type>(__y)); |
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} |
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|
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inline _LIBCPP_INLINE_VISIBILITY |
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_LIBCPP_CONSTEXPR |
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launch |
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operator~(launch __x) |
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{
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return static_cast<launch>(~static_cast<__launch_underlying_type>(__x) & 3); |
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} |
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|
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inline _LIBCPP_INLINE_VISIBILITY |
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launch& |
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operator&=(launch& __x, launch __y) |
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{
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__x = __x & __y; return __x; |
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} |
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|
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inline _LIBCPP_INLINE_VISIBILITY |
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launch& |
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operator|=(launch& __x, launch __y) |
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{
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__x = __x | __y; return __x; |
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} |
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|
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inline _LIBCPP_INLINE_VISIBILITY |
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launch& |
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operator^=(launch& __x, launch __y) |
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{
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__x = __x ^ __y; return __x; |
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} |
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|
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#endif // !_LIBCPP_HAS_NO_STRONG_ENUMS |
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|
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//enum class future_status |
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_LIBCPP_DECLARE_STRONG_ENUM(future_status) |
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{
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ready, |
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timeout, |
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deferred |
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}; |
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_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(future_status) |
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|
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_LIBCPP_FUNC_VIS |
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const error_category& future_category() _NOEXCEPT; |
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|
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inline _LIBCPP_INLINE_VISIBILITY |
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error_code |
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make_error_code(future_errc __e) _NOEXCEPT |
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{
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return error_code(static_cast<int>(__e), future_category()); |
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} |
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|
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inline _LIBCPP_INLINE_VISIBILITY |
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error_condition |
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make_error_condition(future_errc __e) _NOEXCEPT |
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{
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return error_condition(static_cast<int>(__e), future_category()); |
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} |
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|
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class _LIBCPP_EXCEPTION_ABI future_error |
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: public logic_error |
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{
|
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error_code __ec_; |
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public: |
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future_error(error_code __ec); |
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|
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_LIBCPP_INLINE_VISIBILITY |
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const error_code& code() const _NOEXCEPT {return __ec_;}
|
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|
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virtual ~future_error() _NOEXCEPT; |
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}; |
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|
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class _LIBCPP_TYPE_VIS __assoc_sub_state |
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: public __shared_count |
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{
|
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protected: |
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exception_ptr __exception_; |
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mutable mutex __mut_; |
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mutable condition_variable __cv_; |
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unsigned __state_; |
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|
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virtual void __on_zero_shared() _NOEXCEPT; |
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void __sub_wait(unique_lock<mutex>& __lk); |
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public: |
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enum |
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{
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__constructed = 1, |
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__future_attached = 2, |
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ready = 4, |
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deferred = 8 |
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}; |
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|
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_LIBCPP_INLINE_VISIBILITY |
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__assoc_sub_state() : __state_(0) {}
|
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|
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_LIBCPP_INLINE_VISIBILITY |
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bool __has_value() const |
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{return (__state_ & __constructed) || (__exception_ != nullptr);}
|
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|
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_LIBCPP_INLINE_VISIBILITY |
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void __set_future_attached() |
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{
|
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lock_guard<mutex> __lk(__mut_); |
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__state_ |= __future_attached; |
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} |
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_LIBCPP_INLINE_VISIBILITY |
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bool __has_future_attached() const {return (__state_ & __future_attached) != 0;}
|
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|
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_LIBCPP_INLINE_VISIBILITY |
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void __set_deferred() {__state_ |= deferred;}
|
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|
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void __make_ready(); |
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_LIBCPP_INLINE_VISIBILITY |
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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 |