mirror of
https://github.com/capstone-engine/llvm-capstone.git
synced 2024-10-07 10:54:01 +00:00
34933d1872
Previously the header included several headers, possibly granularized threading headers. This could lead to build errors when these headers were incompatible with threading disabled. Now test the guard before inclusion. This matches the pattern used for no localization and no wide characters. Fixes: https://github.com/llvm/llvm-project/issues/76620
2060 lines
64 KiB
C++
2060 lines
64 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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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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future synopsis
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namespace std
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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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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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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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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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const error_category& future_category() noexcept;
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class future_error : public logic_error {
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public:
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explicit future_error(future_errc e); // since C++17
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const error_code& code() const noexcept;
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const char* what() const noexcept;
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private:
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error_code ec_; // exposition only
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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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// 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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// retrieving the result
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future<R> get_future();
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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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// 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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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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// 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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// retrieving the result
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future<R&> get_future();
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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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// 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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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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// 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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// retrieving the result
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future<void> get_future();
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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() noexcept;
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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 <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() noexcept;
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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() noexcept;
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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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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; // extension
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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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#ifdef _LIBCPP_HAS_NO_THREADS
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# error "<future> is not supported since libc++ has been configured without support for threads."
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#endif
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#include <__assert> // all public C++ headers provide the assertion handler
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#include <__availability>
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#include <__chrono/duration.h>
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#include <__chrono/time_point.h>
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#include <__exception/exception_ptr.h>
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#include <__memory/addressof.h>
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#include <__memory/allocator.h>
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#include <__memory/allocator_arg_t.h>
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#include <__memory/allocator_destructor.h>
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#include <__memory/allocator_traits.h>
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#include <__memory/compressed_pair.h>
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#include <__memory/pointer_traits.h>
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#include <__memory/shared_ptr.h>
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#include <__memory/unique_ptr.h>
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#include <__memory/uses_allocator.h>
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#include <__system_error/error_category.h>
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#include <__system_error/error_code.h>
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#include <__system_error/error_condition.h>
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#include <__type_traits/aligned_storage.h>
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#include <__type_traits/strip_signature.h>
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#include <__utility/auto_cast.h>
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#include <__utility/forward.h>
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#include <__utility/move.h>
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#include <mutex>
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#include <new>
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#include <stdexcept>
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#include <thread>
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#include <version>
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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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_LIBCPP_BEGIN_NAMESPACE_STD
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// enum class future_errc
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_LIBCPP_DECLARE_STRONG_ENUM(future_errc){
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future_already_retrieved = 1, promise_already_satisfied, no_state, broken_promise};
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_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(future_errc)
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template <>
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struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<future_errc> : public true_type {};
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#ifdef _LIBCPP_CXX03_LANG
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template <>
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struct _LIBCPP_TEMPLATE_VIS is_error_code_enum<future_errc::__lx> : public true_type {};
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#endif
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// enum class launch
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_LIBCPP_DECLARE_STRONG_ENUM(launch){async = 1, deferred = 2, any = async | deferred};
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_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(launch)
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#ifndef _LIBCPP_CXX03_LANG
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typedef underlying_type<launch>::type __launch_underlying_type;
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR launch operator&(launch __x, launch __y) {
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return static_cast<launch>(static_cast<__launch_underlying_type>(__x) & static_cast<__launch_underlying_type>(__y));
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}
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR launch operator|(launch __x, launch __y) {
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return static_cast<launch>(static_cast<__launch_underlying_type>(__x) | static_cast<__launch_underlying_type>(__y));
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}
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR launch operator^(launch __x, launch __y) {
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return static_cast<launch>(static_cast<__launch_underlying_type>(__x) ^ static_cast<__launch_underlying_type>(__y));
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}
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inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR launch operator~(launch __x) {
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return static_cast<launch>(~static_cast<__launch_underlying_type>(__x) & 3);
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}
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inline _LIBCPP_HIDE_FROM_ABI launch& operator&=(launch& __x, launch __y) {
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__x = __x & __y;
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return __x;
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}
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inline _LIBCPP_HIDE_FROM_ABI launch& operator|=(launch& __x, launch __y) {
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__x = __x | __y;
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return __x;
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}
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inline _LIBCPP_HIDE_FROM_ABI launch& operator^=(launch& __x, launch __y) {
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__x = __x ^ __y;
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return __x;
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}
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#endif // !_LIBCPP_CXX03_LANG
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// enum class future_status
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_LIBCPP_DECLARE_STRONG_ENUM(future_status){ready, timeout, deferred};
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_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(future_status)
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_LIBCPP_EXPORTED_FROM_ABI const error_category& future_category() _NOEXCEPT;
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inline _LIBCPP_HIDE_FROM_ABI error_code make_error_code(future_errc __e) _NOEXCEPT {
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return error_code(static_cast<int>(__e), future_category());
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}
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inline _LIBCPP_HIDE_FROM_ABI error_condition make_error_condition(future_errc __e) _NOEXCEPT {
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return error_condition(static_cast<int>(__e), future_category());
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}
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_LIBCPP_NORETURN inline _LIBCPP_HIDE_FROM_ABI void __throw_future_error(future_errc __ev);
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class _LIBCPP_EXPORTED_FROM_ABI future_error : public logic_error {
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error_code __ec_;
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future_error(error_code);
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friend void __throw_future_error(future_errc);
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template <class>
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friend class promise;
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public:
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#if _LIBCPP_STD_VER >= 17
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_LIBCPP_HIDE_FROM_ABI explicit future_error(future_errc __ec) : future_error(std::make_error_code(__ec)) {}
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#endif
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_LIBCPP_HIDE_FROM_ABI const error_code& code() const _NOEXCEPT { return __ec_; }
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_LIBCPP_HIDE_FROM_ABI future_error(const future_error&) _NOEXCEPT = default;
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~future_error() _NOEXCEPT override;
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};
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// Declared above std::future_error
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void __throw_future_error(future_errc __ev) {
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#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
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throw future_error(make_error_code(__ev));
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#else
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(void)__ev;
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_LIBCPP_VERBOSE_ABORT("future_error was thrown in -fno-exceptions mode");
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#endif
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}
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class _LIBCPP_EXPORTED_FROM_ABI __assoc_sub_state : public __shared_count {
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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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void __on_zero_shared() _NOEXCEPT override;
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void __sub_wait(unique_lock<mutex>& __lk);
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public:
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enum { __constructed = 1, __future_attached = 2, ready = 4, deferred = 8 };
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_LIBCPP_HIDE_FROM_ABI __assoc_sub_state() : __state_(0) {}
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_LIBCPP_HIDE_FROM_ABI bool __has_value() const { return (__state_ & __constructed) || (__exception_ != nullptr); }
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_LIBCPP_HIDE_FROM_ABI void __attach_future() {
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lock_guard<mutex> __lk(__mut_);
|
|
bool __has_future_attached = (__state_ & __future_attached) != 0;
|
|
if (__has_future_attached)
|
|
__throw_future_error(future_errc::future_already_retrieved);
|
|
this->__add_shared();
|
|
__state_ |= __future_attached;
|
|
}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void __set_deferred() { __state_ |= deferred; }
|
|
|
|
void __make_ready();
|
|
_LIBCPP_HIDE_FROM_ABI bool __is_ready() const { return (__state_ & ready) != 0; }
|
|
|
|
void set_value();
|
|
void set_value_at_thread_exit();
|
|
|
|
void set_exception(exception_ptr __p);
|
|
void set_exception_at_thread_exit(exception_ptr __p);
|
|
|
|
void copy();
|
|
|
|
void wait();
|
|
template <class _Rep, class _Period>
|
|
future_status _LIBCPP_HIDE_FROM_ABI wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const;
|
|
template <class _Clock, class _Duration>
|
|
_LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS future_status
|
|
wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const;
|
|
|
|
virtual void __execute();
|
|
};
|
|
|
|
template <class _Clock, class _Duration>
|
|
future_status __assoc_sub_state::wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const {
|
|
unique_lock<mutex> __lk(__mut_);
|
|
if (__state_ & deferred)
|
|
return future_status::deferred;
|
|
while (!(__state_ & ready) && _Clock::now() < __abs_time)
|
|
__cv_.wait_until(__lk, __abs_time);
|
|
if (__state_ & ready)
|
|
return future_status::ready;
|
|
return future_status::timeout;
|
|
}
|
|
|
|
template <class _Rep, class _Period>
|
|
inline future_status __assoc_sub_state::wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const {
|
|
return wait_until(chrono::steady_clock::now() + __rel_time);
|
|
}
|
|
|
|
template <class _Rp>
|
|
class _LIBCPP_HIDDEN __assoc_state : public __assoc_sub_state {
|
|
typedef __assoc_sub_state base;
|
|
_LIBCPP_SUPPRESS_DEPRECATED_PUSH
|
|
typedef typename aligned_storage<sizeof(_Rp), _LIBCPP_ALIGNOF(_Rp)>::type _Up;
|
|
_LIBCPP_SUPPRESS_DEPRECATED_POP
|
|
|
|
protected:
|
|
_Up __value_;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL void __on_zero_shared() _NOEXCEPT override;
|
|
|
|
public:
|
|
template <class _Arg>
|
|
_LIBCPP_HIDE_FROM_ABI void set_value(_Arg&& __arg);
|
|
|
|
template <class _Arg>
|
|
_LIBCPP_HIDE_FROM_ABI void set_value_at_thread_exit(_Arg&& __arg);
|
|
|
|
_LIBCPP_HIDE_FROM_ABI _Rp move();
|
|
_LIBCPP_HIDE_FROM_ABI __add_lvalue_reference_t<_Rp> copy();
|
|
};
|
|
|
|
template <class _Rp>
|
|
void __assoc_state<_Rp>::__on_zero_shared() _NOEXCEPT {
|
|
if (this->__state_ & base::__constructed)
|
|
reinterpret_cast<_Rp*>(&__value_)->~_Rp();
|
|
delete this;
|
|
}
|
|
|
|
template <class _Rp>
|
|
template <class _Arg>
|
|
void __assoc_state<_Rp>::set_value(_Arg&& __arg) {
|
|
unique_lock<mutex> __lk(this->__mut_);
|
|
if (this->__has_value())
|
|
__throw_future_error(future_errc::promise_already_satisfied);
|
|
::new ((void*)&__value_) _Rp(std::forward<_Arg>(__arg));
|
|
this->__state_ |= base::__constructed | base::ready;
|
|
__cv_.notify_all();
|
|
}
|
|
|
|
template <class _Rp>
|
|
template <class _Arg>
|
|
void __assoc_state<_Rp>::set_value_at_thread_exit(_Arg&& __arg) {
|
|
unique_lock<mutex> __lk(this->__mut_);
|
|
if (this->__has_value())
|
|
__throw_future_error(future_errc::promise_already_satisfied);
|
|
::new ((void*)&__value_) _Rp(std::forward<_Arg>(__arg));
|
|
this->__state_ |= base::__constructed;
|
|
__thread_local_data()->__make_ready_at_thread_exit(this);
|
|
}
|
|
|
|
template <class _Rp>
|
|
_Rp __assoc_state<_Rp>::move() {
|
|
unique_lock<mutex> __lk(this->__mut_);
|
|
this->__sub_wait(__lk);
|
|
if (this->__exception_ != nullptr)
|
|
std::rethrow_exception(this->__exception_);
|
|
return std::move(*reinterpret_cast<_Rp*>(&__value_));
|
|
}
|
|
|
|
template <class _Rp>
|
|
__add_lvalue_reference_t<_Rp> __assoc_state<_Rp>::copy() {
|
|
unique_lock<mutex> __lk(this->__mut_);
|
|
this->__sub_wait(__lk);
|
|
if (this->__exception_ != nullptr)
|
|
std::rethrow_exception(this->__exception_);
|
|
return *reinterpret_cast<_Rp*>(&__value_);
|
|
}
|
|
|
|
template <class _Rp>
|
|
class __assoc_state<_Rp&> : public __assoc_sub_state {
|
|
typedef __assoc_sub_state base;
|
|
typedef _Rp* _Up;
|
|
|
|
protected:
|
|
_Up __value_;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL void __on_zero_shared() _NOEXCEPT override;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI void set_value(_Rp& __arg);
|
|
_LIBCPP_HIDE_FROM_ABI void set_value_at_thread_exit(_Rp& __arg);
|
|
|
|
_LIBCPP_HIDE_FROM_ABI _Rp& copy();
|
|
};
|
|
|
|
template <class _Rp>
|
|
void __assoc_state<_Rp&>::__on_zero_shared() _NOEXCEPT {
|
|
delete this;
|
|
}
|
|
|
|
template <class _Rp>
|
|
void __assoc_state<_Rp&>::set_value(_Rp& __arg) {
|
|
unique_lock<mutex> __lk(this->__mut_);
|
|
if (this->__has_value())
|
|
__throw_future_error(future_errc::promise_already_satisfied);
|
|
__value_ = std::addressof(__arg);
|
|
this->__state_ |= base::__constructed | base::ready;
|
|
__cv_.notify_all();
|
|
}
|
|
|
|
template <class _Rp>
|
|
void __assoc_state<_Rp&>::set_value_at_thread_exit(_Rp& __arg) {
|
|
unique_lock<mutex> __lk(this->__mut_);
|
|
if (this->__has_value())
|
|
__throw_future_error(future_errc::promise_already_satisfied);
|
|
__value_ = std::addressof(__arg);
|
|
this->__state_ |= base::__constructed;
|
|
__thread_local_data()->__make_ready_at_thread_exit(this);
|
|
}
|
|
|
|
template <class _Rp>
|
|
_Rp& __assoc_state<_Rp&>::copy() {
|
|
unique_lock<mutex> __lk(this->__mut_);
|
|
this->__sub_wait(__lk);
|
|
if (this->__exception_ != nullptr)
|
|
std::rethrow_exception(this->__exception_);
|
|
return *__value_;
|
|
}
|
|
|
|
template <class _Rp, class _Alloc>
|
|
class __assoc_state_alloc : public __assoc_state<_Rp> {
|
|
typedef __assoc_state<_Rp> base;
|
|
_Alloc __alloc_;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual void __on_zero_shared() _NOEXCEPT;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI explicit __assoc_state_alloc(const _Alloc& __a) : __alloc_(__a) {}
|
|
};
|
|
|
|
template <class _Rp, class _Alloc>
|
|
void __assoc_state_alloc<_Rp, _Alloc>::__on_zero_shared() _NOEXCEPT {
|
|
if (this->__state_ & base::__constructed)
|
|
reinterpret_cast<_Rp*>(std::addressof(this->__value_))->~_Rp();
|
|
typedef typename __allocator_traits_rebind<_Alloc, __assoc_state_alloc>::type _Al;
|
|
typedef allocator_traits<_Al> _ATraits;
|
|
typedef pointer_traits<typename _ATraits::pointer> _PTraits;
|
|
_Al __a(__alloc_);
|
|
this->~__assoc_state_alloc();
|
|
__a.deallocate(_PTraits::pointer_to(*this), 1);
|
|
}
|
|
|
|
template <class _Rp, class _Alloc>
|
|
class __assoc_state_alloc<_Rp&, _Alloc> : public __assoc_state<_Rp&> {
|
|
typedef __assoc_state<_Rp&> base;
|
|
_Alloc __alloc_;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual void __on_zero_shared() _NOEXCEPT;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI explicit __assoc_state_alloc(const _Alloc& __a) : __alloc_(__a) {}
|
|
};
|
|
|
|
template <class _Rp, class _Alloc>
|
|
void __assoc_state_alloc<_Rp&, _Alloc>::__on_zero_shared() _NOEXCEPT {
|
|
typedef typename __allocator_traits_rebind<_Alloc, __assoc_state_alloc>::type _Al;
|
|
typedef allocator_traits<_Al> _ATraits;
|
|
typedef pointer_traits<typename _ATraits::pointer> _PTraits;
|
|
_Al __a(__alloc_);
|
|
this->~__assoc_state_alloc();
|
|
__a.deallocate(_PTraits::pointer_to(*this), 1);
|
|
}
|
|
|
|
template <class _Alloc>
|
|
class __assoc_sub_state_alloc : public __assoc_sub_state {
|
|
typedef __assoc_sub_state base;
|
|
_Alloc __alloc_;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL void __on_zero_shared() _NOEXCEPT override;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI explicit __assoc_sub_state_alloc(const _Alloc& __a) : __alloc_(__a) {}
|
|
};
|
|
|
|
template <class _Alloc>
|
|
void __assoc_sub_state_alloc<_Alloc>::__on_zero_shared() _NOEXCEPT {
|
|
typedef typename __allocator_traits_rebind<_Alloc, __assoc_sub_state_alloc>::type _Al;
|
|
typedef allocator_traits<_Al> _ATraits;
|
|
typedef pointer_traits<typename _ATraits::pointer> _PTraits;
|
|
_Al __a(__alloc_);
|
|
this->~__assoc_sub_state_alloc();
|
|
__a.deallocate(_PTraits::pointer_to(*this), 1);
|
|
}
|
|
|
|
template <class _Rp, class _Fp>
|
|
class __deferred_assoc_state : public __assoc_state<_Rp> {
|
|
typedef __assoc_state<_Rp> base;
|
|
|
|
_Fp __func_;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI explicit __deferred_assoc_state(_Fp&& __f);
|
|
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual void __execute();
|
|
};
|
|
|
|
template <class _Rp, class _Fp>
|
|
inline __deferred_assoc_state<_Rp, _Fp>::__deferred_assoc_state(_Fp&& __f) : __func_(std::forward<_Fp>(__f)) {
|
|
this->__set_deferred();
|
|
}
|
|
|
|
template <class _Rp, class _Fp>
|
|
void __deferred_assoc_state<_Rp, _Fp>::__execute() {
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
try {
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
this->set_value(__func_());
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
this->set_exception(current_exception());
|
|
}
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
}
|
|
|
|
template <class _Fp>
|
|
class __deferred_assoc_state<void, _Fp> : public __assoc_sub_state {
|
|
typedef __assoc_sub_state base;
|
|
|
|
_Fp __func_;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI explicit __deferred_assoc_state(_Fp&& __f);
|
|
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL void __execute() override;
|
|
};
|
|
|
|
template <class _Fp>
|
|
inline __deferred_assoc_state<void, _Fp>::__deferred_assoc_state(_Fp&& __f) : __func_(std::forward<_Fp>(__f)) {
|
|
this->__set_deferred();
|
|
}
|
|
|
|
template <class _Fp>
|
|
void __deferred_assoc_state<void, _Fp>::__execute() {
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
try {
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
__func_();
|
|
this->set_value();
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
this->set_exception(current_exception());
|
|
}
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
}
|
|
|
|
template <class _Rp, class _Fp>
|
|
class __async_assoc_state : public __assoc_state<_Rp> {
|
|
typedef __assoc_state<_Rp> base;
|
|
|
|
_Fp __func_;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual void __on_zero_shared() _NOEXCEPT;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI explicit __async_assoc_state(_Fp&& __f);
|
|
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual void __execute();
|
|
};
|
|
|
|
template <class _Rp, class _Fp>
|
|
inline __async_assoc_state<_Rp, _Fp>::__async_assoc_state(_Fp&& __f) : __func_(std::forward<_Fp>(__f)) {}
|
|
|
|
template <class _Rp, class _Fp>
|
|
void __async_assoc_state<_Rp, _Fp>::__execute() {
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
try {
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
this->set_value(__func_());
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
this->set_exception(current_exception());
|
|
}
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
}
|
|
|
|
template <class _Rp, class _Fp>
|
|
void __async_assoc_state<_Rp, _Fp>::__on_zero_shared() _NOEXCEPT {
|
|
this->wait();
|
|
base::__on_zero_shared();
|
|
}
|
|
|
|
template <class _Fp>
|
|
class __async_assoc_state<void, _Fp> : public __assoc_sub_state {
|
|
typedef __assoc_sub_state base;
|
|
|
|
_Fp __func_;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL void __on_zero_shared() _NOEXCEPT override;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI explicit __async_assoc_state(_Fp&& __f);
|
|
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL void __execute() override;
|
|
};
|
|
|
|
template <class _Fp>
|
|
inline __async_assoc_state<void, _Fp>::__async_assoc_state(_Fp&& __f) : __func_(std::forward<_Fp>(__f)) {}
|
|
|
|
template <class _Fp>
|
|
void __async_assoc_state<void, _Fp>::__execute() {
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
try {
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
__func_();
|
|
this->set_value();
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
this->set_exception(current_exception());
|
|
}
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
}
|
|
|
|
template <class _Fp>
|
|
void __async_assoc_state<void, _Fp>::__on_zero_shared() _NOEXCEPT {
|
|
this->wait();
|
|
base::__on_zero_shared();
|
|
}
|
|
|
|
template <class _Rp>
|
|
class _LIBCPP_TEMPLATE_VIS promise;
|
|
template <class _Rp>
|
|
class _LIBCPP_TEMPLATE_VIS shared_future;
|
|
|
|
// future
|
|
|
|
template <class _Rp>
|
|
class _LIBCPP_TEMPLATE_VIS future;
|
|
|
|
template <class _Rp, class _Fp>
|
|
_LIBCPP_HIDE_FROM_ABI future<_Rp> __make_deferred_assoc_state(_Fp&& __f);
|
|
|
|
template <class _Rp, class _Fp>
|
|
_LIBCPP_HIDE_FROM_ABI future<_Rp> __make_async_assoc_state(_Fp&& __f);
|
|
|
|
template <class _Rp>
|
|
class _LIBCPP_TEMPLATE_VIS future {
|
|
__assoc_state<_Rp>* __state_;
|
|
|
|
explicit _LIBCPP_HIDE_FROM_ABI future(__assoc_state<_Rp>* __state);
|
|
|
|
template <class>
|
|
friend class promise;
|
|
template <class>
|
|
friend class shared_future;
|
|
|
|
template <class _R1, class _Fp>
|
|
friend future<_R1> __make_deferred_assoc_state(_Fp&& __f);
|
|
template <class _R1, class _Fp>
|
|
friend future<_R1> __make_async_assoc_state(_Fp&& __f);
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI future() _NOEXCEPT : __state_(nullptr) {}
|
|
_LIBCPP_HIDE_FROM_ABI future(future&& __rhs) _NOEXCEPT : __state_(__rhs.__state_) { __rhs.__state_ = nullptr; }
|
|
future(const future&) = delete;
|
|
future& operator=(const future&) = delete;
|
|
_LIBCPP_HIDE_FROM_ABI future& operator=(future&& __rhs) _NOEXCEPT {
|
|
future(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI ~future();
|
|
_LIBCPP_HIDE_FROM_ABI shared_future<_Rp> share() _NOEXCEPT;
|
|
|
|
// retrieving the value
|
|
_LIBCPP_HIDE_FROM_ABI _Rp get();
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void swap(future& __rhs) _NOEXCEPT { std::swap(__state_, __rhs.__state_); }
|
|
|
|
// functions to check state
|
|
_LIBCPP_HIDE_FROM_ABI bool valid() const _NOEXCEPT { return __state_ != nullptr; }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void wait() const { __state_->wait(); }
|
|
template <class _Rep, class _Period>
|
|
_LIBCPP_HIDE_FROM_ABI future_status wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const {
|
|
return __state_->wait_for(__rel_time);
|
|
}
|
|
template <class _Clock, class _Duration>
|
|
_LIBCPP_HIDE_FROM_ABI future_status wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const {
|
|
return __state_->wait_until(__abs_time);
|
|
}
|
|
};
|
|
|
|
template <class _Rp>
|
|
future<_Rp>::future(__assoc_state<_Rp>* __state) : __state_(__state) {
|
|
__state_->__attach_future();
|
|
}
|
|
|
|
struct __release_shared_count {
|
|
_LIBCPP_HIDE_FROM_ABI void operator()(__shared_count* __p) { __p->__release_shared(); }
|
|
};
|
|
|
|
template <class _Rp>
|
|
future<_Rp>::~future() {
|
|
if (__state_)
|
|
__state_->__release_shared();
|
|
}
|
|
|
|
template <class _Rp>
|
|
_Rp future<_Rp>::get() {
|
|
unique_ptr<__shared_count, __release_shared_count> __guard(__state_);
|
|
__assoc_state<_Rp>* __s = __state_;
|
|
__state_ = nullptr;
|
|
return __s->move();
|
|
}
|
|
|
|
template <class _Rp>
|
|
class _LIBCPP_TEMPLATE_VIS future<_Rp&> {
|
|
__assoc_state<_Rp&>* __state_;
|
|
|
|
explicit _LIBCPP_HIDE_FROM_ABI future(__assoc_state<_Rp&>* __state);
|
|
|
|
template <class>
|
|
friend class promise;
|
|
template <class>
|
|
friend class shared_future;
|
|
|
|
template <class _R1, class _Fp>
|
|
friend future<_R1> __make_deferred_assoc_state(_Fp&& __f);
|
|
template <class _R1, class _Fp>
|
|
friend future<_R1> __make_async_assoc_state(_Fp&& __f);
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI future() _NOEXCEPT : __state_(nullptr) {}
|
|
_LIBCPP_HIDE_FROM_ABI future(future&& __rhs) _NOEXCEPT : __state_(__rhs.__state_) { __rhs.__state_ = nullptr; }
|
|
future(const future&) = delete;
|
|
future& operator=(const future&) = delete;
|
|
_LIBCPP_HIDE_FROM_ABI future& operator=(future&& __rhs) _NOEXCEPT {
|
|
future(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI ~future();
|
|
_LIBCPP_HIDE_FROM_ABI shared_future<_Rp&> share() _NOEXCEPT;
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|
|
|
// retrieving the value
|
|
_LIBCPP_HIDE_FROM_ABI _Rp& get();
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void swap(future& __rhs) _NOEXCEPT { std::swap(__state_, __rhs.__state_); }
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|
|
|
// functions to check state
|
|
_LIBCPP_HIDE_FROM_ABI bool valid() const _NOEXCEPT { return __state_ != nullptr; }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void wait() const { __state_->wait(); }
|
|
template <class _Rep, class _Period>
|
|
_LIBCPP_HIDE_FROM_ABI future_status wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const {
|
|
return __state_->wait_for(__rel_time);
|
|
}
|
|
template <class _Clock, class _Duration>
|
|
_LIBCPP_HIDE_FROM_ABI future_status wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const {
|
|
return __state_->wait_until(__abs_time);
|
|
}
|
|
};
|
|
|
|
template <class _Rp>
|
|
future<_Rp&>::future(__assoc_state<_Rp&>* __state) : __state_(__state) {
|
|
__state_->__attach_future();
|
|
}
|
|
|
|
template <class _Rp>
|
|
future<_Rp&>::~future() {
|
|
if (__state_)
|
|
__state_->__release_shared();
|
|
}
|
|
|
|
template <class _Rp>
|
|
_Rp& future<_Rp&>::get() {
|
|
unique_ptr<__shared_count, __release_shared_count> __guard(__state_);
|
|
__assoc_state<_Rp&>* __s = __state_;
|
|
__state_ = nullptr;
|
|
return __s->copy();
|
|
}
|
|
|
|
template <>
|
|
class _LIBCPP_EXPORTED_FROM_ABI future<void> {
|
|
__assoc_sub_state* __state_;
|
|
|
|
explicit future(__assoc_sub_state* __state);
|
|
|
|
template <class>
|
|
friend class promise;
|
|
template <class>
|
|
friend class shared_future;
|
|
|
|
template <class _R1, class _Fp>
|
|
friend future<_R1> __make_deferred_assoc_state(_Fp&& __f);
|
|
template <class _R1, class _Fp>
|
|
friend future<_R1> __make_async_assoc_state(_Fp&& __f);
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI future() _NOEXCEPT : __state_(nullptr) {}
|
|
_LIBCPP_HIDE_FROM_ABI future(future&& __rhs) _NOEXCEPT : __state_(__rhs.__state_) { __rhs.__state_ = nullptr; }
|
|
future(const future&) = delete;
|
|
future& operator=(const future&) = delete;
|
|
_LIBCPP_HIDE_FROM_ABI future& operator=(future&& __rhs) _NOEXCEPT {
|
|
future(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
|
|
~future();
|
|
_LIBCPP_HIDE_FROM_ABI shared_future<void> share() _NOEXCEPT;
|
|
|
|
// retrieving the value
|
|
void get();
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void swap(future& __rhs) _NOEXCEPT { std::swap(__state_, __rhs.__state_); }
|
|
|
|
// functions to check state
|
|
_LIBCPP_HIDE_FROM_ABI bool valid() const _NOEXCEPT { return __state_ != nullptr; }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void wait() const { __state_->wait(); }
|
|
template <class _Rep, class _Period>
|
|
_LIBCPP_HIDE_FROM_ABI future_status wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const {
|
|
return __state_->wait_for(__rel_time);
|
|
}
|
|
template <class _Clock, class _Duration>
|
|
_LIBCPP_HIDE_FROM_ABI future_status wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const {
|
|
return __state_->wait_until(__abs_time);
|
|
}
|
|
};
|
|
|
|
template <class _Rp>
|
|
inline _LIBCPP_HIDE_FROM_ABI void swap(future<_Rp>& __x, future<_Rp>& __y) _NOEXCEPT {
|
|
__x.swap(__y);
|
|
}
|
|
|
|
// promise<R>
|
|
|
|
template <class _Callable>
|
|
class packaged_task;
|
|
|
|
template <class _Rp>
|
|
class _LIBCPP_TEMPLATE_VIS promise {
|
|
__assoc_state<_Rp>* __state_;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI explicit promise(nullptr_t) _NOEXCEPT : __state_(nullptr) {}
|
|
|
|
template <class>
|
|
friend class packaged_task;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI promise();
|
|
template <class _Alloc>
|
|
_LIBCPP_HIDE_FROM_ABI promise(allocator_arg_t, const _Alloc& __a);
|
|
_LIBCPP_HIDE_FROM_ABI promise(promise&& __rhs) _NOEXCEPT : __state_(__rhs.__state_) { __rhs.__state_ = nullptr; }
|
|
promise(const promise& __rhs) = delete;
|
|
_LIBCPP_HIDE_FROM_ABI ~promise();
|
|
|
|
// assignment
|
|
_LIBCPP_HIDE_FROM_ABI promise& operator=(promise&& __rhs) _NOEXCEPT {
|
|
promise(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
promise& operator=(const promise& __rhs) = delete;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void swap(promise& __rhs) _NOEXCEPT { std::swap(__state_, __rhs.__state_); }
|
|
|
|
// retrieving the result
|
|
_LIBCPP_HIDE_FROM_ABI future<_Rp> get_future();
|
|
|
|
// setting the result
|
|
_LIBCPP_HIDE_FROM_ABI void set_value(const _Rp& __r);
|
|
_LIBCPP_HIDE_FROM_ABI void set_value(_Rp&& __r);
|
|
_LIBCPP_HIDE_FROM_ABI void set_exception(exception_ptr __p);
|
|
|
|
// setting the result with deferred notification
|
|
_LIBCPP_HIDE_FROM_ABI void set_value_at_thread_exit(const _Rp& __r);
|
|
_LIBCPP_HIDE_FROM_ABI void set_value_at_thread_exit(_Rp&& __r);
|
|
_LIBCPP_HIDE_FROM_ABI void set_exception_at_thread_exit(exception_ptr __p);
|
|
};
|
|
|
|
template <class _Rp>
|
|
promise<_Rp>::promise() : __state_(new __assoc_state<_Rp>) {}
|
|
|
|
template <class _Rp>
|
|
template <class _Alloc>
|
|
promise<_Rp>::promise(allocator_arg_t, const _Alloc& __a0) {
|
|
typedef __assoc_state_alloc<_Rp, _Alloc> _State;
|
|
typedef typename __allocator_traits_rebind<_Alloc, _State>::type _A2;
|
|
typedef __allocator_destructor<_A2> _D2;
|
|
_A2 __a(__a0);
|
|
unique_ptr<_State, _D2> __hold(__a.allocate(1), _D2(__a, 1));
|
|
::new ((void*)std::addressof(*__hold.get())) _State(__a0);
|
|
__state_ = std::addressof(*__hold.release());
|
|
}
|
|
|
|
template <class _Rp>
|
|
promise<_Rp>::~promise() {
|
|
if (__state_) {
|
|
if (!__state_->__has_value() && __state_->use_count() > 1)
|
|
__state_->set_exception(make_exception_ptr(future_error(make_error_code(future_errc::broken_promise))));
|
|
__state_->__release_shared();
|
|
}
|
|
}
|
|
|
|
template <class _Rp>
|
|
future<_Rp> promise<_Rp>::get_future() {
|
|
if (__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
return future<_Rp>(__state_);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void promise<_Rp>::set_value(const _Rp& __r) {
|
|
if (__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
__state_->set_value(__r);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void promise<_Rp>::set_value(_Rp&& __r) {
|
|
if (__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
__state_->set_value(std::move(__r));
|
|
}
|
|
|
|
template <class _Rp>
|
|
void promise<_Rp>::set_exception(exception_ptr __p) {
|
|
_LIBCPP_ASSERT_NON_NULL(__p != nullptr, "promise::set_exception: received nullptr");
|
|
if (__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
__state_->set_exception(__p);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void promise<_Rp>::set_value_at_thread_exit(const _Rp& __r) {
|
|
if (__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
__state_->set_value_at_thread_exit(__r);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void promise<_Rp>::set_value_at_thread_exit(_Rp&& __r) {
|
|
if (__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
__state_->set_value_at_thread_exit(std::move(__r));
|
|
}
|
|
|
|
template <class _Rp>
|
|
void promise<_Rp>::set_exception_at_thread_exit(exception_ptr __p) {
|
|
_LIBCPP_ASSERT_NON_NULL(__p != nullptr, "promise::set_exception_at_thread_exit: received nullptr");
|
|
if (__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
__state_->set_exception_at_thread_exit(__p);
|
|
}
|
|
|
|
// promise<R&>
|
|
|
|
template <class _Rp>
|
|
class _LIBCPP_TEMPLATE_VIS promise<_Rp&> {
|
|
__assoc_state<_Rp&>* __state_;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI explicit promise(nullptr_t) _NOEXCEPT : __state_(nullptr) {}
|
|
|
|
template <class>
|
|
friend class packaged_task;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI promise();
|
|
template <class _Allocator>
|
|
_LIBCPP_HIDE_FROM_ABI promise(allocator_arg_t, const _Allocator& __a);
|
|
_LIBCPP_HIDE_FROM_ABI promise(promise&& __rhs) _NOEXCEPT : __state_(__rhs.__state_) { __rhs.__state_ = nullptr; }
|
|
promise(const promise& __rhs) = delete;
|
|
_LIBCPP_HIDE_FROM_ABI ~promise();
|
|
|
|
// assignment
|
|
_LIBCPP_HIDE_FROM_ABI promise& operator=(promise&& __rhs) _NOEXCEPT {
|
|
promise(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
promise& operator=(const promise& __rhs) = delete;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void swap(promise& __rhs) _NOEXCEPT { std::swap(__state_, __rhs.__state_); }
|
|
|
|
// retrieving the result
|
|
_LIBCPP_HIDE_FROM_ABI future<_Rp&> get_future();
|
|
|
|
// setting the result
|
|
_LIBCPP_HIDE_FROM_ABI void set_value(_Rp& __r);
|
|
_LIBCPP_HIDE_FROM_ABI void set_exception(exception_ptr __p);
|
|
|
|
// setting the result with deferred notification
|
|
_LIBCPP_HIDE_FROM_ABI void set_value_at_thread_exit(_Rp&);
|
|
_LIBCPP_HIDE_FROM_ABI void set_exception_at_thread_exit(exception_ptr __p);
|
|
};
|
|
|
|
template <class _Rp>
|
|
promise<_Rp&>::promise() : __state_(new __assoc_state<_Rp&>) {}
|
|
|
|
template <class _Rp>
|
|
template <class _Alloc>
|
|
promise<_Rp&>::promise(allocator_arg_t, const _Alloc& __a0) {
|
|
typedef __assoc_state_alloc<_Rp&, _Alloc> _State;
|
|
typedef typename __allocator_traits_rebind<_Alloc, _State>::type _A2;
|
|
typedef __allocator_destructor<_A2> _D2;
|
|
_A2 __a(__a0);
|
|
unique_ptr<_State, _D2> __hold(__a.allocate(1), _D2(__a, 1));
|
|
::new ((void*)std::addressof(*__hold.get())) _State(__a0);
|
|
__state_ = std::addressof(*__hold.release());
|
|
}
|
|
|
|
template <class _Rp>
|
|
promise<_Rp&>::~promise() {
|
|
if (__state_) {
|
|
if (!__state_->__has_value() && __state_->use_count() > 1)
|
|
__state_->set_exception(make_exception_ptr(future_error(make_error_code(future_errc::broken_promise))));
|
|
__state_->__release_shared();
|
|
}
|
|
}
|
|
|
|
template <class _Rp>
|
|
future<_Rp&> promise<_Rp&>::get_future() {
|
|
if (__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
return future<_Rp&>(__state_);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void promise<_Rp&>::set_value(_Rp& __r) {
|
|
if (__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
__state_->set_value(__r);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void promise<_Rp&>::set_exception(exception_ptr __p) {
|
|
_LIBCPP_ASSERT_NON_NULL(__p != nullptr, "promise::set_exception: received nullptr");
|
|
if (__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
__state_->set_exception(__p);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void promise<_Rp&>::set_value_at_thread_exit(_Rp& __r) {
|
|
if (__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
__state_->set_value_at_thread_exit(__r);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void promise<_Rp&>::set_exception_at_thread_exit(exception_ptr __p) {
|
|
_LIBCPP_ASSERT_NON_NULL(__p != nullptr, "promise::set_exception_at_thread_exit: received nullptr");
|
|
if (__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
__state_->set_exception_at_thread_exit(__p);
|
|
}
|
|
|
|
// promise<void>
|
|
|
|
template <>
|
|
class _LIBCPP_EXPORTED_FROM_ABI promise<void> {
|
|
__assoc_sub_state* __state_;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI explicit promise(nullptr_t) _NOEXCEPT : __state_(nullptr) {}
|
|
|
|
template <class>
|
|
friend class packaged_task;
|
|
|
|
public:
|
|
promise();
|
|
template <class _Allocator>
|
|
_LIBCPP_METHOD_TEMPLATE_IMPLICIT_INSTANTIATION_VIS promise(allocator_arg_t, const _Allocator& __a);
|
|
_LIBCPP_HIDE_FROM_ABI promise(promise&& __rhs) _NOEXCEPT : __state_(__rhs.__state_) { __rhs.__state_ = nullptr; }
|
|
promise(const promise& __rhs) = delete;
|
|
~promise();
|
|
|
|
// assignment
|
|
_LIBCPP_HIDE_FROM_ABI promise& operator=(promise&& __rhs) _NOEXCEPT {
|
|
promise(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
promise& operator=(const promise& __rhs) = delete;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void swap(promise& __rhs) _NOEXCEPT { std::swap(__state_, __rhs.__state_); }
|
|
|
|
// retrieving the result
|
|
future<void> get_future();
|
|
|
|
// setting the result
|
|
void set_value();
|
|
void set_exception(exception_ptr __p);
|
|
|
|
// setting the result with deferred notification
|
|
void set_value_at_thread_exit();
|
|
void set_exception_at_thread_exit(exception_ptr __p);
|
|
};
|
|
|
|
template <class _Alloc>
|
|
promise<void>::promise(allocator_arg_t, const _Alloc& __a0) {
|
|
typedef __assoc_sub_state_alloc<_Alloc> _State;
|
|
typedef typename __allocator_traits_rebind<_Alloc, _State>::type _A2;
|
|
typedef __allocator_destructor<_A2> _D2;
|
|
_A2 __a(__a0);
|
|
unique_ptr<_State, _D2> __hold(__a.allocate(1), _D2(__a, 1));
|
|
::new ((void*)std::addressof(*__hold.get())) _State(__a0);
|
|
__state_ = std::addressof(*__hold.release());
|
|
}
|
|
|
|
template <class _Rp>
|
|
inline _LIBCPP_HIDE_FROM_ABI void swap(promise<_Rp>& __x, promise<_Rp>& __y) _NOEXCEPT {
|
|
__x.swap(__y);
|
|
}
|
|
|
|
template <class _Rp, class _Alloc>
|
|
struct _LIBCPP_TEMPLATE_VIS uses_allocator<promise<_Rp>, _Alloc> : public true_type {};
|
|
|
|
// packaged_task
|
|
|
|
template <class _Fp>
|
|
class __packaged_task_base;
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
class __packaged_task_base<_Rp(_ArgTypes...)> {
|
|
__packaged_task_base(const __packaged_task_base&);
|
|
__packaged_task_base& operator=(const __packaged_task_base&);
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI __packaged_task_base() {}
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL
|
|
virtual ~__packaged_task_base() {}
|
|
virtual void __move_to(__packaged_task_base*) _NOEXCEPT = 0;
|
|
virtual void destroy() = 0;
|
|
virtual void destroy_deallocate() = 0;
|
|
virtual _Rp operator()(_ArgTypes&&...) = 0;
|
|
};
|
|
|
|
template <class _FD, class _Alloc, class _FB>
|
|
class __packaged_task_func;
|
|
|
|
template <class _Fp, class _Alloc, class _Rp, class... _ArgTypes>
|
|
class __packaged_task_func<_Fp, _Alloc, _Rp(_ArgTypes...)> : public __packaged_task_base<_Rp(_ArgTypes...)> {
|
|
__compressed_pair<_Fp, _Alloc> __f_;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI explicit __packaged_task_func(const _Fp& __f) : __f_(__f, __default_init_tag()) {}
|
|
_LIBCPP_HIDE_FROM_ABI explicit __packaged_task_func(_Fp&& __f) : __f_(std::move(__f), __default_init_tag()) {}
|
|
_LIBCPP_HIDE_FROM_ABI __packaged_task_func(const _Fp& __f, const _Alloc& __a) : __f_(__f, __a) {}
|
|
_LIBCPP_HIDE_FROM_ABI __packaged_task_func(_Fp&& __f, const _Alloc& __a) : __f_(std::move(__f), __a) {}
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual void __move_to(__packaged_task_base<_Rp(_ArgTypes...)>*) _NOEXCEPT;
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual void destroy();
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual void destroy_deallocate();
|
|
_LIBCPP_HIDE_FROM_ABI_VIRTUAL virtual _Rp operator()(_ArgTypes&&... __args);
|
|
};
|
|
|
|
template <class _Fp, class _Alloc, class _Rp, class... _ArgTypes>
|
|
void __packaged_task_func<_Fp, _Alloc, _Rp(_ArgTypes...)>::__move_to(
|
|
__packaged_task_base<_Rp(_ArgTypes...)>* __p) _NOEXCEPT {
|
|
::new ((void*)__p) __packaged_task_func(std::move(__f_.first()), std::move(__f_.second()));
|
|
}
|
|
|
|
template <class _Fp, class _Alloc, class _Rp, class... _ArgTypes>
|
|
void __packaged_task_func<_Fp, _Alloc, _Rp(_ArgTypes...)>::destroy() {
|
|
__f_.~__compressed_pair<_Fp, _Alloc>();
|
|
}
|
|
|
|
template <class _Fp, class _Alloc, class _Rp, class... _ArgTypes>
|
|
void __packaged_task_func<_Fp, _Alloc, _Rp(_ArgTypes...)>::destroy_deallocate() {
|
|
typedef typename __allocator_traits_rebind<_Alloc, __packaged_task_func>::type _Ap;
|
|
typedef allocator_traits<_Ap> _ATraits;
|
|
typedef pointer_traits<typename _ATraits::pointer> _PTraits;
|
|
_Ap __a(__f_.second());
|
|
__f_.~__compressed_pair<_Fp, _Alloc>();
|
|
__a.deallocate(_PTraits::pointer_to(*this), 1);
|
|
}
|
|
|
|
template <class _Fp, class _Alloc, class _Rp, class... _ArgTypes>
|
|
_Rp __packaged_task_func<_Fp, _Alloc, _Rp(_ArgTypes...)>::operator()(_ArgTypes&&... __arg) {
|
|
return std::__invoke(__f_.first(), std::forward<_ArgTypes>(__arg)...);
|
|
}
|
|
|
|
template <class _Callable>
|
|
class __packaged_task_function;
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
class __packaged_task_function<_Rp(_ArgTypes...)> {
|
|
typedef __packaged_task_base<_Rp(_ArgTypes...)> __base;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_NO_CFI __base* __get_buf() { return (__base*)&__buf_; }
|
|
|
|
_LIBCPP_SUPPRESS_DEPRECATED_PUSH
|
|
typename aligned_storage<3 * sizeof(void*)>::type __buf_;
|
|
_LIBCPP_SUPPRESS_DEPRECATED_POP
|
|
__base* __f_;
|
|
|
|
public:
|
|
typedef _Rp result_type;
|
|
|
|
// construct/copy/destroy:
|
|
_LIBCPP_HIDE_FROM_ABI __packaged_task_function() _NOEXCEPT : __f_(nullptr) {}
|
|
template <class _Fp>
|
|
_LIBCPP_HIDE_FROM_ABI __packaged_task_function(_Fp&& __f);
|
|
template <class _Fp, class _Alloc>
|
|
_LIBCPP_HIDE_FROM_ABI __packaged_task_function(allocator_arg_t, const _Alloc& __a, _Fp&& __f);
|
|
|
|
_LIBCPP_HIDE_FROM_ABI __packaged_task_function(__packaged_task_function&&) _NOEXCEPT;
|
|
_LIBCPP_HIDE_FROM_ABI __packaged_task_function& operator=(__packaged_task_function&&) _NOEXCEPT;
|
|
|
|
__packaged_task_function(const __packaged_task_function&) = delete;
|
|
__packaged_task_function& operator=(const __packaged_task_function&) = delete;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI ~__packaged_task_function();
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void swap(__packaged_task_function&) _NOEXCEPT;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI _LIBCPP_HIDE_FROM_ABI _Rp operator()(_ArgTypes...) const;
|
|
};
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
__packaged_task_function<_Rp(_ArgTypes...)>::__packaged_task_function(__packaged_task_function&& __f) _NOEXCEPT {
|
|
if (__f.__f_ == nullptr)
|
|
__f_ = nullptr;
|
|
else if (__f.__f_ == __f.__get_buf()) {
|
|
__f.__f_->__move_to(__get_buf());
|
|
__f_ = (__base*)&__buf_;
|
|
} else {
|
|
__f_ = __f.__f_;
|
|
__f.__f_ = nullptr;
|
|
}
|
|
}
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
template <class _Fp>
|
|
__packaged_task_function<_Rp(_ArgTypes...)>::__packaged_task_function(_Fp&& __f) : __f_(nullptr) {
|
|
typedef __libcpp_remove_reference_t<__decay_t<_Fp> > _FR;
|
|
typedef __packaged_task_func<_FR, allocator<_FR>, _Rp(_ArgTypes...)> _FF;
|
|
if (sizeof(_FF) <= sizeof(__buf_)) {
|
|
::new ((void*)&__buf_) _FF(std::forward<_Fp>(__f));
|
|
__f_ = (__base*)&__buf_;
|
|
} else {
|
|
typedef allocator<_FF> _Ap;
|
|
_Ap __a;
|
|
typedef __allocator_destructor<_Ap> _Dp;
|
|
unique_ptr<__base, _Dp> __hold(__a.allocate(1), _Dp(__a, 1));
|
|
::new ((void*)__hold.get()) _FF(std::forward<_Fp>(__f), allocator<_FR>(__a));
|
|
__f_ = __hold.release();
|
|
}
|
|
}
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
template <class _Fp, class _Alloc>
|
|
__packaged_task_function<_Rp(_ArgTypes...)>::__packaged_task_function(allocator_arg_t, const _Alloc& __a0, _Fp&& __f)
|
|
: __f_(nullptr) {
|
|
typedef __libcpp_remove_reference_t<__decay_t<_Fp> > _FR;
|
|
typedef __packaged_task_func<_FR, _Alloc, _Rp(_ArgTypes...)> _FF;
|
|
if (sizeof(_FF) <= sizeof(__buf_)) {
|
|
__f_ = (__base*)&__buf_;
|
|
::new ((void*)__f_) _FF(std::forward<_Fp>(__f));
|
|
} else {
|
|
typedef typename __allocator_traits_rebind<_Alloc, _FF>::type _Ap;
|
|
_Ap __a(__a0);
|
|
typedef __allocator_destructor<_Ap> _Dp;
|
|
unique_ptr<__base, _Dp> __hold(__a.allocate(1), _Dp(__a, 1));
|
|
::new ((void*)std::addressof(*__hold.get())) _FF(std::forward<_Fp>(__f), _Alloc(__a));
|
|
__f_ = std::addressof(*__hold.release());
|
|
}
|
|
}
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
__packaged_task_function<_Rp(_ArgTypes...)>&
|
|
__packaged_task_function<_Rp(_ArgTypes...)>::operator=(__packaged_task_function&& __f) _NOEXCEPT {
|
|
if (__f_ == __get_buf())
|
|
__f_->destroy();
|
|
else if (__f_)
|
|
__f_->destroy_deallocate();
|
|
__f_ = nullptr;
|
|
if (__f.__f_ == nullptr)
|
|
__f_ = nullptr;
|
|
else if (__f.__f_ == __f.__get_buf()) {
|
|
__f.__f_->__move_to(__get_buf());
|
|
__f_ = __get_buf();
|
|
} else {
|
|
__f_ = __f.__f_;
|
|
__f.__f_ = nullptr;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
__packaged_task_function<_Rp(_ArgTypes...)>::~__packaged_task_function() {
|
|
if (__f_ == __get_buf())
|
|
__f_->destroy();
|
|
else if (__f_)
|
|
__f_->destroy_deallocate();
|
|
}
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
_LIBCPP_NO_CFI void __packaged_task_function<_Rp(_ArgTypes...)>::swap(__packaged_task_function& __f) _NOEXCEPT {
|
|
if (__f_ == (__base*)&__buf_ && __f.__f_ == (__base*)&__f.__buf_) {
|
|
_LIBCPP_SUPPRESS_DEPRECATED_PUSH
|
|
typename aligned_storage<sizeof(__buf_)>::type __tempbuf;
|
|
_LIBCPP_SUPPRESS_DEPRECATED_POP
|
|
__base* __t = (__base*)&__tempbuf;
|
|
__f_->__move_to(__t);
|
|
__f_->destroy();
|
|
__f_ = nullptr;
|
|
__f.__f_->__move_to((__base*)&__buf_);
|
|
__f.__f_->destroy();
|
|
__f.__f_ = nullptr;
|
|
__f_ = (__base*)&__buf_;
|
|
__t->__move_to((__base*)&__f.__buf_);
|
|
__t->destroy();
|
|
__f.__f_ = (__base*)&__f.__buf_;
|
|
} else if (__f_ == (__base*)&__buf_) {
|
|
__f_->__move_to((__base*)&__f.__buf_);
|
|
__f_->destroy();
|
|
__f_ = __f.__f_;
|
|
__f.__f_ = (__base*)&__f.__buf_;
|
|
} else if (__f.__f_ == (__base*)&__f.__buf_) {
|
|
__f.__f_->__move_to((__base*)&__buf_);
|
|
__f.__f_->destroy();
|
|
__f.__f_ = __f_;
|
|
__f_ = (__base*)&__buf_;
|
|
} else
|
|
std::swap(__f_, __f.__f_);
|
|
}
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
inline _Rp __packaged_task_function<_Rp(_ArgTypes...)>::operator()(_ArgTypes... __arg) const {
|
|
return (*__f_)(std::forward<_ArgTypes>(__arg)...);
|
|
}
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
class _LIBCPP_TEMPLATE_VIS packaged_task<_Rp(_ArgTypes...)> {
|
|
public:
|
|
typedef _Rp result_type; // extension
|
|
|
|
private:
|
|
__packaged_task_function<result_type(_ArgTypes...)> __f_;
|
|
promise<result_type> __p_;
|
|
|
|
public:
|
|
// construction and destruction
|
|
_LIBCPP_HIDE_FROM_ABI packaged_task() _NOEXCEPT : __p_(nullptr) {}
|
|
template <class _Fp, class = __enable_if_t<!is_same<__remove_cvref_t<_Fp>, packaged_task>::value> >
|
|
_LIBCPP_HIDE_FROM_ABI explicit packaged_task(_Fp&& __f) : __f_(std::forward<_Fp>(__f)) {}
|
|
template <class _Fp, class _Allocator, class = __enable_if_t<!is_same<__remove_cvref_t<_Fp>, packaged_task>::value> >
|
|
_LIBCPP_HIDE_FROM_ABI packaged_task(allocator_arg_t, const _Allocator& __a, _Fp&& __f)
|
|
: __f_(allocator_arg_t(), __a, std::forward<_Fp>(__f)), __p_(allocator_arg_t(), __a) {}
|
|
// ~packaged_task() = default;
|
|
|
|
// no copy
|
|
packaged_task(const packaged_task&) = delete;
|
|
packaged_task& operator=(const packaged_task&) = delete;
|
|
|
|
// move support
|
|
_LIBCPP_HIDE_FROM_ABI packaged_task(packaged_task&& __other) _NOEXCEPT
|
|
: __f_(std::move(__other.__f_)),
|
|
__p_(std::move(__other.__p_)) {}
|
|
_LIBCPP_HIDE_FROM_ABI packaged_task& operator=(packaged_task&& __other) _NOEXCEPT {
|
|
__f_ = std::move(__other.__f_);
|
|
__p_ = std::move(__other.__p_);
|
|
return *this;
|
|
}
|
|
_LIBCPP_HIDE_FROM_ABI void swap(packaged_task& __other) _NOEXCEPT {
|
|
__f_.swap(__other.__f_);
|
|
__p_.swap(__other.__p_);
|
|
}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI bool valid() const _NOEXCEPT { return __p_.__state_ != nullptr; }
|
|
|
|
// result retrieval
|
|
_LIBCPP_HIDE_FROM_ABI future<result_type> get_future() { return __p_.get_future(); }
|
|
|
|
// execution
|
|
_LIBCPP_HIDE_FROM_ABI void operator()(_ArgTypes... __args);
|
|
_LIBCPP_HIDE_FROM_ABI void make_ready_at_thread_exit(_ArgTypes... __args);
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void reset();
|
|
};
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
void packaged_task<_Rp(_ArgTypes...)>::operator()(_ArgTypes... __args) {
|
|
if (__p_.__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
if (__p_.__state_->__has_value())
|
|
__throw_future_error(future_errc::promise_already_satisfied);
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
try {
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
__p_.set_value(__f_(std::forward<_ArgTypes>(__args)...));
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
__p_.set_exception(current_exception());
|
|
}
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
}
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
void packaged_task<_Rp(_ArgTypes...)>::make_ready_at_thread_exit(_ArgTypes... __args) {
|
|
if (__p_.__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
if (__p_.__state_->__has_value())
|
|
__throw_future_error(future_errc::promise_already_satisfied);
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
try {
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
__p_.set_value_at_thread_exit(__f_(std::forward<_ArgTypes>(__args)...));
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
__p_.set_exception_at_thread_exit(current_exception());
|
|
}
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
}
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
void packaged_task<_Rp(_ArgTypes...)>::reset() {
|
|
if (!valid())
|
|
__throw_future_error(future_errc::no_state);
|
|
__p_ = promise<result_type>();
|
|
}
|
|
|
|
template <class... _ArgTypes>
|
|
class _LIBCPP_TEMPLATE_VIS packaged_task<void(_ArgTypes...)> {
|
|
public:
|
|
typedef void result_type; // extension
|
|
|
|
private:
|
|
__packaged_task_function<result_type(_ArgTypes...)> __f_;
|
|
promise<result_type> __p_;
|
|
|
|
public:
|
|
// construction and destruction
|
|
_LIBCPP_HIDE_FROM_ABI packaged_task() _NOEXCEPT : __p_(nullptr) {}
|
|
template <class _Fp, class = __enable_if_t<!is_same<__remove_cvref_t<_Fp>, packaged_task>::value> >
|
|
_LIBCPP_HIDE_FROM_ABI explicit packaged_task(_Fp&& __f) : __f_(std::forward<_Fp>(__f)) {}
|
|
template <class _Fp, class _Allocator, class = __enable_if_t<!is_same<__remove_cvref_t<_Fp>, packaged_task>::value> >
|
|
_LIBCPP_HIDE_FROM_ABI packaged_task(allocator_arg_t, const _Allocator& __a, _Fp&& __f)
|
|
: __f_(allocator_arg_t(), __a, std::forward<_Fp>(__f)), __p_(allocator_arg_t(), __a) {}
|
|
// ~packaged_task() = default;
|
|
|
|
// no copy
|
|
packaged_task(const packaged_task&) = delete;
|
|
packaged_task& operator=(const packaged_task&) = delete;
|
|
|
|
// move support
|
|
_LIBCPP_HIDE_FROM_ABI packaged_task(packaged_task&& __other) _NOEXCEPT
|
|
: __f_(std::move(__other.__f_)),
|
|
__p_(std::move(__other.__p_)) {}
|
|
_LIBCPP_HIDE_FROM_ABI packaged_task& operator=(packaged_task&& __other) _NOEXCEPT {
|
|
__f_ = std::move(__other.__f_);
|
|
__p_ = std::move(__other.__p_);
|
|
return *this;
|
|
}
|
|
_LIBCPP_HIDE_FROM_ABI void swap(packaged_task& __other) _NOEXCEPT {
|
|
__f_.swap(__other.__f_);
|
|
__p_.swap(__other.__p_);
|
|
}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI bool valid() const _NOEXCEPT { return __p_.__state_ != nullptr; }
|
|
|
|
// result retrieval
|
|
_LIBCPP_HIDE_FROM_ABI future<result_type> get_future() { return __p_.get_future(); }
|
|
|
|
// execution
|
|
_LIBCPP_HIDE_FROM_ABI void operator()(_ArgTypes... __args);
|
|
_LIBCPP_HIDE_FROM_ABI void make_ready_at_thread_exit(_ArgTypes... __args);
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void reset();
|
|
};
|
|
|
|
#if _LIBCPP_STD_VER >= 17
|
|
|
|
template <class _Rp, class... _Args>
|
|
packaged_task(_Rp (*)(_Args...)) -> packaged_task<_Rp(_Args...)>;
|
|
|
|
template <class _Fp, class _Stripped = typename __strip_signature<decltype(&_Fp::operator())>::type>
|
|
packaged_task(_Fp) -> packaged_task<_Stripped>;
|
|
|
|
#endif
|
|
|
|
template <class... _ArgTypes>
|
|
void packaged_task<void(_ArgTypes...)>::operator()(_ArgTypes... __args) {
|
|
if (__p_.__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
if (__p_.__state_->__has_value())
|
|
__throw_future_error(future_errc::promise_already_satisfied);
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
try {
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
__f_(std::forward<_ArgTypes>(__args)...);
|
|
__p_.set_value();
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
__p_.set_exception(current_exception());
|
|
}
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
}
|
|
|
|
template <class... _ArgTypes>
|
|
void packaged_task<void(_ArgTypes...)>::make_ready_at_thread_exit(_ArgTypes... __args) {
|
|
if (__p_.__state_ == nullptr)
|
|
__throw_future_error(future_errc::no_state);
|
|
if (__p_.__state_->__has_value())
|
|
__throw_future_error(future_errc::promise_already_satisfied);
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
try {
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
__f_(std::forward<_ArgTypes>(__args)...);
|
|
__p_.set_value_at_thread_exit();
|
|
#ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
__p_.set_exception_at_thread_exit(current_exception());
|
|
}
|
|
#endif // _LIBCPP_HAS_NO_EXCEPTIONS
|
|
}
|
|
|
|
template <class... _ArgTypes>
|
|
void packaged_task<void(_ArgTypes...)>::reset() {
|
|
if (!valid())
|
|
__throw_future_error(future_errc::no_state);
|
|
__p_ = promise<result_type>();
|
|
}
|
|
|
|
template <class _Rp, class... _ArgTypes>
|
|
inline _LIBCPP_HIDE_FROM_ABI void
|
|
swap(packaged_task<_Rp(_ArgTypes...)>& __x, packaged_task<_Rp(_ArgTypes...)>& __y) _NOEXCEPT {
|
|
__x.swap(__y);
|
|
}
|
|
|
|
template <class _Callable, class _Alloc>
|
|
struct _LIBCPP_TEMPLATE_VIS uses_allocator<packaged_task<_Callable>, _Alloc> : public true_type {};
|
|
|
|
template <class _Rp, class _Fp>
|
|
_LIBCPP_HIDE_FROM_ABI future<_Rp> __make_deferred_assoc_state(_Fp&& __f) {
|
|
unique_ptr<__deferred_assoc_state<_Rp, _Fp>, __release_shared_count> __h(
|
|
new __deferred_assoc_state<_Rp, _Fp>(std::forward<_Fp>(__f)));
|
|
return future<_Rp>(__h.get());
|
|
}
|
|
|
|
template <class _Rp, class _Fp>
|
|
_LIBCPP_HIDE_FROM_ABI future<_Rp> __make_async_assoc_state(_Fp&& __f) {
|
|
unique_ptr<__async_assoc_state<_Rp, _Fp>, __release_shared_count> __h(
|
|
new __async_assoc_state<_Rp, _Fp>(std::forward<_Fp>(__f)));
|
|
std::thread(&__async_assoc_state<_Rp, _Fp>::__execute, __h.get()).detach();
|
|
return future<_Rp>(__h.get());
|
|
}
|
|
|
|
#ifndef _LIBCPP_CXX03_LANG
|
|
|
|
template <class _Fp, class... _Args>
|
|
class _LIBCPP_HIDDEN __async_func {
|
|
tuple<_Fp, _Args...> __f_;
|
|
|
|
public:
|
|
typedef typename __invoke_of<_Fp, _Args...>::type _Rp;
|
|
|
|
_LIBCPP_HIDE_FROM_ABI explicit __async_func(_Fp&& __f, _Args&&... __args)
|
|
: __f_(std::move(__f), std::move(__args)...) {}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI __async_func(__async_func&& __f) : __f_(std::move(__f.__f_)) {}
|
|
|
|
_LIBCPP_HIDE_FROM_ABI _Rp operator()() {
|
|
typedef typename __make_tuple_indices<1 + sizeof...(_Args), 1>::type _Index;
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|
return __execute(_Index());
|
|
}
|
|
|
|
private:
|
|
template <size_t... _Indices>
|
|
_LIBCPP_HIDE_FROM_ABI _Rp __execute(__tuple_indices<_Indices...>) {
|
|
return std::__invoke(std::move(std::get<0>(__f_)), std::move(std::get<_Indices>(__f_))...);
|
|
}
|
|
};
|
|
|
|
inline _LIBCPP_HIDE_FROM_ABI bool __does_policy_contain(launch __policy, launch __value) {
|
|
return (int(__policy) & int(__value)) != 0;
|
|
}
|
|
|
|
template <class _Fp, class... _Args>
|
|
_LIBCPP_NODISCARD_AFTER_CXX17 _LIBCPP_HIDE_FROM_ABI
|
|
future<typename __invoke_of<__decay_t<_Fp>, __decay_t<_Args>...>::type>
|
|
async(launch __policy, _Fp&& __f, _Args&&... __args) {
|
|
typedef __async_func<__decay_t<_Fp>, __decay_t<_Args>...> _BF;
|
|
typedef typename _BF::_Rp _Rp;
|
|
|
|
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
try {
|
|
# endif
|
|
if (__does_policy_contain(__policy, launch::async))
|
|
return std::__make_async_assoc_state<_Rp>(
|
|
_BF(_LIBCPP_AUTO_CAST(std::forward<_Fp>(__f)), _LIBCPP_AUTO_CAST(std::forward<_Args>(__args))...));
|
|
# ifndef _LIBCPP_HAS_NO_EXCEPTIONS
|
|
} catch (...) {
|
|
if (__policy == launch::async)
|
|
throw;
|
|
}
|
|
# endif
|
|
|
|
if (__does_policy_contain(__policy, launch::deferred))
|
|
return std::__make_deferred_assoc_state<_Rp>(
|
|
_BF(_LIBCPP_AUTO_CAST(std::forward<_Fp>(__f)), _LIBCPP_AUTO_CAST(std::forward<_Args>(__args))...));
|
|
return future<_Rp>{};
|
|
}
|
|
|
|
template <class _Fp, class... _Args>
|
|
_LIBCPP_NODISCARD_AFTER_CXX17 inline _LIBCPP_HIDE_FROM_ABI
|
|
future<typename __invoke_of<__decay_t<_Fp>, __decay_t<_Args>...>::type>
|
|
async(_Fp&& __f, _Args&&... __args) {
|
|
return std::async(launch::any, std::forward<_Fp>(__f), std::forward<_Args>(__args)...);
|
|
}
|
|
|
|
#endif // C++03
|
|
|
|
// shared_future
|
|
|
|
template <class _Rp>
|
|
class _LIBCPP_TEMPLATE_VIS shared_future {
|
|
__assoc_state<_Rp>* __state_;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI shared_future() _NOEXCEPT : __state_(nullptr) {}
|
|
_LIBCPP_HIDE_FROM_ABI shared_future(const shared_future& __rhs) _NOEXCEPT : __state_(__rhs.__state_) {
|
|
if (__state_)
|
|
__state_->__add_shared();
|
|
}
|
|
_LIBCPP_HIDE_FROM_ABI shared_future(future<_Rp>&& __f) _NOEXCEPT : __state_(__f.__state_) { __f.__state_ = nullptr; }
|
|
_LIBCPP_HIDE_FROM_ABI shared_future(shared_future&& __rhs) _NOEXCEPT : __state_(__rhs.__state_) {
|
|
__rhs.__state_ = nullptr;
|
|
}
|
|
_LIBCPP_HIDE_FROM_ABI ~shared_future();
|
|
_LIBCPP_HIDE_FROM_ABI shared_future& operator=(const shared_future& __rhs) _NOEXCEPT;
|
|
_LIBCPP_HIDE_FROM_ABI shared_future& operator=(shared_future&& __rhs) _NOEXCEPT {
|
|
shared_future(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
|
|
// retrieving the value
|
|
_LIBCPP_HIDE_FROM_ABI const _Rp& get() const { return __state_->copy(); }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void swap(shared_future& __rhs) _NOEXCEPT { std::swap(__state_, __rhs.__state_); }
|
|
|
|
// functions to check state
|
|
_LIBCPP_HIDE_FROM_ABI bool valid() const _NOEXCEPT { return __state_ != nullptr; }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void wait() const { __state_->wait(); }
|
|
template <class _Rep, class _Period>
|
|
_LIBCPP_HIDE_FROM_ABI future_status wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const {
|
|
return __state_->wait_for(__rel_time);
|
|
}
|
|
template <class _Clock, class _Duration>
|
|
_LIBCPP_HIDE_FROM_ABI future_status wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const {
|
|
return __state_->wait_until(__abs_time);
|
|
}
|
|
};
|
|
|
|
template <class _Rp>
|
|
shared_future<_Rp>::~shared_future() {
|
|
if (__state_)
|
|
__state_->__release_shared();
|
|
}
|
|
|
|
template <class _Rp>
|
|
shared_future<_Rp>& shared_future<_Rp>::operator=(const shared_future& __rhs) _NOEXCEPT {
|
|
if (__rhs.__state_)
|
|
__rhs.__state_->__add_shared();
|
|
if (__state_)
|
|
__state_->__release_shared();
|
|
__state_ = __rhs.__state_;
|
|
return *this;
|
|
}
|
|
|
|
template <class _Rp>
|
|
class _LIBCPP_TEMPLATE_VIS shared_future<_Rp&> {
|
|
__assoc_state<_Rp&>* __state_;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI shared_future() _NOEXCEPT : __state_(nullptr) {}
|
|
_LIBCPP_HIDE_FROM_ABI shared_future(const shared_future& __rhs) : __state_(__rhs.__state_) {
|
|
if (__state_)
|
|
__state_->__add_shared();
|
|
}
|
|
_LIBCPP_HIDE_FROM_ABI shared_future(future<_Rp&>&& __f) _NOEXCEPT : __state_(__f.__state_) { __f.__state_ = nullptr; }
|
|
_LIBCPP_HIDE_FROM_ABI shared_future(shared_future&& __rhs) _NOEXCEPT : __state_(__rhs.__state_) {
|
|
__rhs.__state_ = nullptr;
|
|
}
|
|
_LIBCPP_HIDE_FROM_ABI ~shared_future();
|
|
_LIBCPP_HIDE_FROM_ABI shared_future& operator=(const shared_future& __rhs);
|
|
_LIBCPP_HIDE_FROM_ABI shared_future& operator=(shared_future&& __rhs) _NOEXCEPT {
|
|
shared_future(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
|
|
// retrieving the value
|
|
_LIBCPP_HIDE_FROM_ABI _Rp& get() const { return __state_->copy(); }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void swap(shared_future& __rhs) _NOEXCEPT { std::swap(__state_, __rhs.__state_); }
|
|
|
|
// functions to check state
|
|
_LIBCPP_HIDE_FROM_ABI bool valid() const _NOEXCEPT { return __state_ != nullptr; }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void wait() const { __state_->wait(); }
|
|
template <class _Rep, class _Period>
|
|
_LIBCPP_HIDE_FROM_ABI future_status wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const {
|
|
return __state_->wait_for(__rel_time);
|
|
}
|
|
template <class _Clock, class _Duration>
|
|
_LIBCPP_HIDE_FROM_ABI future_status wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const {
|
|
return __state_->wait_until(__abs_time);
|
|
}
|
|
};
|
|
|
|
template <class _Rp>
|
|
shared_future<_Rp&>::~shared_future() {
|
|
if (__state_)
|
|
__state_->__release_shared();
|
|
}
|
|
|
|
template <class _Rp>
|
|
shared_future<_Rp&>& shared_future<_Rp&>::operator=(const shared_future& __rhs) {
|
|
if (__rhs.__state_)
|
|
__rhs.__state_->__add_shared();
|
|
if (__state_)
|
|
__state_->__release_shared();
|
|
__state_ = __rhs.__state_;
|
|
return *this;
|
|
}
|
|
|
|
template <>
|
|
class _LIBCPP_EXPORTED_FROM_ABI shared_future<void> {
|
|
__assoc_sub_state* __state_;
|
|
|
|
public:
|
|
_LIBCPP_HIDE_FROM_ABI shared_future() _NOEXCEPT : __state_(nullptr) {}
|
|
_LIBCPP_HIDE_FROM_ABI shared_future(const shared_future& __rhs) : __state_(__rhs.__state_) {
|
|
if (__state_)
|
|
__state_->__add_shared();
|
|
}
|
|
_LIBCPP_HIDE_FROM_ABI shared_future(future<void>&& __f) _NOEXCEPT : __state_(__f.__state_) { __f.__state_ = nullptr; }
|
|
_LIBCPP_HIDE_FROM_ABI shared_future(shared_future&& __rhs) _NOEXCEPT : __state_(__rhs.__state_) {
|
|
__rhs.__state_ = nullptr;
|
|
}
|
|
~shared_future();
|
|
shared_future& operator=(const shared_future& __rhs);
|
|
_LIBCPP_HIDE_FROM_ABI shared_future& operator=(shared_future&& __rhs) _NOEXCEPT {
|
|
shared_future(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
|
|
// retrieving the value
|
|
_LIBCPP_HIDE_FROM_ABI void get() const { __state_->copy(); }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void swap(shared_future& __rhs) _NOEXCEPT { std::swap(__state_, __rhs.__state_); }
|
|
|
|
// functions to check state
|
|
_LIBCPP_HIDE_FROM_ABI bool valid() const _NOEXCEPT { return __state_ != nullptr; }
|
|
|
|
_LIBCPP_HIDE_FROM_ABI void wait() const { __state_->wait(); }
|
|
template <class _Rep, class _Period>
|
|
_LIBCPP_HIDE_FROM_ABI future_status wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const {
|
|
return __state_->wait_for(__rel_time);
|
|
}
|
|
template <class _Clock, class _Duration>
|
|
_LIBCPP_HIDE_FROM_ABI future_status wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const {
|
|
return __state_->wait_until(__abs_time);
|
|
}
|
|
};
|
|
|
|
template <class _Rp>
|
|
inline _LIBCPP_HIDE_FROM_ABI void swap(shared_future<_Rp>& __x, shared_future<_Rp>& __y) _NOEXCEPT {
|
|
__x.swap(__y);
|
|
}
|
|
|
|
template <class _Rp>
|
|
inline shared_future<_Rp> future<_Rp>::share() _NOEXCEPT {
|
|
return shared_future<_Rp>(std::move(*this));
|
|
}
|
|
|
|
template <class _Rp>
|
|
inline shared_future<_Rp&> future<_Rp&>::share() _NOEXCEPT {
|
|
return shared_future<_Rp&>(std::move(*this));
|
|
}
|
|
|
|
inline shared_future<void> future<void>::share() _NOEXCEPT { return shared_future<void>(std::move(*this)); }
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 17
|
|
# include <chrono>
|
|
#endif
|
|
|
|
#if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
|
|
# include <atomic>
|
|
# include <cstdlib>
|
|
# include <exception>
|
|
# include <iosfwd>
|
|
# include <system_error>
|
|
#endif
|
|
|
|
#endif // _LIBCPP_FUTURE
|