3678f64ad3
almost all recent changes to libc++ and libcxxrt. MFC r256642: Since C++ typeinfo objects are currently not guaranteed to be merged at runtime by the dynamic linker, check for their equality in libcxxrt by not only comparing the typeinfo's name pointers, but also comparing the full names, if necessary. (This is similar to what GNU libstdc++ does in its default configuration.) The 'deep' check can be turned off again by defining LIBCXXRT_MERGED_TYPEINFO, and recompiling libcxxrt. Reviewed by: theraven MFC r270522 (by rdivacky): The standard we compile libc++ with is called c++11 not c++0x. MFC r273066 (by bapt): Import patch from libc++ r197313 which allows using libc++ headers with gcc Differential Revision: https://reviews.freebsd.org/D942 Reviewed by: imp MFC r273381 (by bapt): Add support for __cxa_throw_bad_array_new_length in libcxxrt It is required for use with newer g++49 Differential Revision: https://reviews.freebsd.org/D982 Reviewed by: theraven Approved by: theraven MFC r273382 (by bapt): Fix build by marking the new functions as weak This is a temporary fix MFC r273407 (by bapt): When using an external gcc 4.8+ and not building libstdc++ then create in the objectdir a fake libstdc++.so and libstdc++.a which is a symlink on libc++ that allow g++ to satisfy its links dependencies in the least hackish way. Please note that this hacky libstds++ never get installed on the final system Reviewed by: imp MFC r273434 (by bapt): Do not define bad_array_new_length::bad_array_new_length in libc++ anymore when used in combinaison with libcxxrt since it is now defined there already. This fixes building world MFC r276417: Import libcxxrt master 00bc29eb6513624824a6d7db2ebc768a4216a604. Interesting fixes: 76584a0 Reorganize code to use only 32bit atomic ops for 32bit platforms 30d2ae5 Implement __cxa_throw_bad_array_new_length Reviewed by: bapt Differential Revision: https://reviews.freebsd.org/D1390 MFC r277217: Import libc++ trunk r224926. This fixes a number of bugs, completes C++14 support[1], adds more C++1z features[2], and fixes the following LWG issues[3]: 1450: Contradiction in regex_constants 2003: String exception inconsistency in erase. 2075: Progress guarantees, lock-free property, and scheduling assumptions 2104: unique_lock move-assignment should not be noexcept 2112: User-defined classes that cannot be derived from 2132: std::function ambiguity 2135: Unclear requirement for exceptions thrown in condition_variable::wait() 2142: packaged_task::operator() synchronization too broad? 2182: Container::[const_]reference types are misleadingly specified 2186: Incomplete action on async/launch::deferred 2188: Reverse iterator does not fully support targets that overload operator& 2193: Default constructors for standard library containers are explicit 2205: Problematic postconditions of regex_match and regex_search 2213: Return value of std::regex_replace 2240: Probable misuse of term "function scope" in [thread.condition] 2252: Strong guarantee on vector::push_back() still broken with C++11? 2257: Simplify container requirements with the new algorithms 2258: a.erase(q1, q2) unable to directly return q2 2263: Comparing iterators and allocator pointers with different const-character 2268: Setting a default argument in the declaration of a member function assign of std::basic_string 2271: regex_traits::lookup_classname specification unclear 2272: quoted should use char_traits::eq for character comparison 2278: User-defined literals for Standard Library types 2280: begin / end for arrays should be constexpr and noexcept 2285: make_reverse_iterator 2288: Inconsistent requirements for shared mutexes 2291: std::hash is vulnerable to collision DoS attack 2293: Wrong facet used by num_put::do_put 2299: Effects of inaccessible key_compare::is_transparent type are not clear 2301: Why is std::tie not constexpr? 2304: Complexity of count in unordered associative containers 2306: match_results::reference should be value_type&, not const value_type& 2308: Clarify container destructor requirements w.r.t. std::array 2313: tuple_size should always derive from integral_constant<size_t, N> 2314: apply() should return decltype(auto) and use decay_t before tuple_size 2315: weak_ptr should be movable 2316: weak_ptr::lock() should be atomic 2317: The type property queries should be UnaryTypeTraits returning size_t 2320: select_on_container_copy_construction() takes allocators, not containers 2322: Associative(initializer_list, stuff) constructors are underspecified 2323: vector::resize(n, t)'s specification should be simplified 2324: Insert iterator constructors should use addressof() 2329: regex_match()/regex_search() with match_results should forbid temporary strings 2330: regex("meow", regex::icase) is technically forbidden but should be permitted 2332: regex_iterator/regex_token_iterator should forbid temporary regexes 2339: Wording issue in nth_element 2341: Inconsistency between basic_ostream::seekp(pos) and basic_ostream::seekp(off, dir) 2344: quoted()'s interaction with padding is unclear 2346: integral_constant's member functions should be marked noexcept 2350: min, max, and minmax should be constexpr 2356: Stability of erasure in unordered associative containers 2357: Remaining "Assignable" requirement 2359: How does regex_constants::nosubs affect basic_regex::mark_count()? 2360: reverse_iterator::operator*() is unimplementable [1] http://libcxx.llvm.org/cxx1y_status.html [2] http://libcxx.llvm.org/cxx1z_status.html [3] http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html Exp-run: antoine MFC r277944: Partially revert r273382, to reduce diffs against upstream. This was a temporary fix to solve a conflict with an older version of libc++, and it is no longer relevant. MFC r278010: Revert r256642, not only to reduce diffs against upstream libcxxrt, but also because it is the wrong approach: comparing typeinfo names deeply causes trouble if two loaded DSOs use independent types of the same name. In addition, this particular change was never merged to FreeBSD 10.x and 9.x, so let's get rid of it before it ends up in an 11.x release. Discussed with: theraven, joerg@netbsd MFC r278016: Import libcxxrt master 1cb607e89f6135bbc10f3d3b6fba1f983e258dcc. Interesting fixes: 1cb607e Correct gcc version check for __cxa_begin_catch() declaration with or without throw()
2630 lines
70 KiB
C++
2630 lines
70 KiB
C++
// -*- 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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#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
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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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const error_code& code() const noexcept;
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const char* what() const noexcept;
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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();
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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();
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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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// 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;
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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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explicit 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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#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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_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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{
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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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template <>
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struct _LIBCPP_TYPE_VIS_ONLY is_error_code_enum<future_errc> : public true_type {};
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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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//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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#ifndef _LIBCPP_HAS_NO_STRONG_ENUMS
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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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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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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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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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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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inline _LIBCPP_INLINE_VISIBILITY
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launch&
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operator&=(launch& __x, launch __y)
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{
|
|
__x = __x & __y; return __x;
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
launch&
|
|
operator|=(launch& __x, launch __y)
|
|
{
|
|
__x = __x | __y; return __x;
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
launch&
|
|
operator^=(launch& __x, launch __y)
|
|
{
|
|
__x = __x ^ __y; return __x;
|
|
}
|
|
|
|
#endif // !_LIBCPP_HAS_NO_STRONG_ENUMS
|
|
|
|
//enum class future_status
|
|
_LIBCPP_DECLARE_STRONG_ENUM(future_status)
|
|
{
|
|
ready,
|
|
timeout,
|
|
deferred
|
|
};
|
|
_LIBCPP_DECLARE_STRONG_ENUM_EPILOG(future_status)
|
|
|
|
_LIBCPP_FUNC_VIS
|
|
const error_category& future_category() _NOEXCEPT;
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
error_code
|
|
make_error_code(future_errc __e) _NOEXCEPT
|
|
{
|
|
return error_code(static_cast<int>(__e), future_category());
|
|
}
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
error_condition
|
|
make_error_condition(future_errc __e) _NOEXCEPT
|
|
{
|
|
return error_condition(static_cast<int>(__e), future_category());
|
|
}
|
|
|
|
class _LIBCPP_EXCEPTION_ABI future_error
|
|
: public logic_error
|
|
{
|
|
error_code __ec_;
|
|
public:
|
|
future_error(error_code __ec);
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
const error_code& code() const _NOEXCEPT {return __ec_;}
|
|
|
|
virtual ~future_error() _NOEXCEPT;
|
|
};
|
|
|
|
class _LIBCPP_TYPE_VIS __assoc_sub_state
|
|
: public __shared_count
|
|
{
|
|
protected:
|
|
exception_ptr __exception_;
|
|
mutable mutex __mut_;
|
|
mutable condition_variable __cv_;
|
|
unsigned __state_;
|
|
|
|
virtual void __on_zero_shared() _NOEXCEPT;
|
|
void __sub_wait(unique_lock<mutex>& __lk);
|
|
public:
|
|
enum
|
|
{
|
|
__constructed = 1,
|
|
__future_attached = 2,
|
|
ready = 4,
|
|
deferred = 8
|
|
};
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
__assoc_sub_state() : __state_(0) {}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __has_value() const
|
|
{return (__state_ & __constructed) || (__exception_ != nullptr);}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __set_future_attached()
|
|
{
|
|
lock_guard<mutex> __lk(__mut_);
|
|
__state_ |= __future_attached;
|
|
}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool __has_future_attached() const {return (__state_ & __future_attached) != 0;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void __set_deferred() {__state_ |= deferred;}
|
|
|
|
void __make_ready();
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
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
|
|
wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const;
|
|
template <class _Clock, class _Duration>
|
|
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 _LIBCPP_INLINE_VISIBILITY
|
|
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 __assoc_state
|
|
: public __assoc_sub_state
|
|
{
|
|
typedef __assoc_sub_state base;
|
|
typedef typename aligned_storage<sizeof(_Rp), alignment_of<_Rp>::value>::type _Up;
|
|
protected:
|
|
_Up __value_;
|
|
|
|
virtual void __on_zero_shared() _NOEXCEPT;
|
|
public:
|
|
|
|
template <class _Arg>
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
void set_value(_Arg&& __arg);
|
|
#else
|
|
void set_value(_Arg& __arg);
|
|
#endif
|
|
|
|
template <class _Arg>
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
void set_value_at_thread_exit(_Arg&& __arg);
|
|
#else
|
|
void set_value_at_thread_exit(_Arg& __arg);
|
|
#endif
|
|
|
|
_Rp move();
|
|
typename add_lvalue_reference<_Rp>::type 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
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
__assoc_state<_Rp>::set_value(_Arg&& __arg)
|
|
#else
|
|
__assoc_state<_Rp>::set_value(_Arg& __arg)
|
|
#endif
|
|
{
|
|
unique_lock<mutex> __lk(this->__mut_);
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (this->__has_value())
|
|
throw future_error(make_error_code(future_errc::promise_already_satisfied));
|
|
#endif
|
|
::new(&__value_) _Rp(_VSTD::forward<_Arg>(__arg));
|
|
this->__state_ |= base::__constructed | base::ready;
|
|
__lk.unlock();
|
|
__cv_.notify_all();
|
|
}
|
|
|
|
template <class _Rp>
|
|
template <class _Arg>
|
|
void
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
__assoc_state<_Rp>::set_value_at_thread_exit(_Arg&& __arg)
|
|
#else
|
|
__assoc_state<_Rp>::set_value_at_thread_exit(_Arg& __arg)
|
|
#endif
|
|
{
|
|
unique_lock<mutex> __lk(this->__mut_);
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (this->__has_value())
|
|
throw future_error(make_error_code(future_errc::promise_already_satisfied));
|
|
#endif
|
|
::new(&__value_) _Rp(_VSTD::forward<_Arg>(__arg));
|
|
this->__state_ |= base::__constructed;
|
|
__thread_local_data()->__make_ready_at_thread_exit(this);
|
|
__lk.unlock();
|
|
}
|
|
|
|
template <class _Rp>
|
|
_Rp
|
|
__assoc_state<_Rp>::move()
|
|
{
|
|
unique_lock<mutex> __lk(this->__mut_);
|
|
this->__sub_wait(__lk);
|
|
if (this->__exception_ != nullptr)
|
|
rethrow_exception(this->__exception_);
|
|
return _VSTD::move(*reinterpret_cast<_Rp*>(&__value_));
|
|
}
|
|
|
|
template <class _Rp>
|
|
typename add_lvalue_reference<_Rp>::type
|
|
__assoc_state<_Rp>::copy()
|
|
{
|
|
unique_lock<mutex> __lk(this->__mut_);
|
|
this->__sub_wait(__lk);
|
|
if (this->__exception_ != nullptr)
|
|
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_;
|
|
|
|
virtual void __on_zero_shared() _NOEXCEPT;
|
|
public:
|
|
|
|
void set_value(_Rp& __arg);
|
|
void set_value_at_thread_exit(_Rp& __arg);
|
|
|
|
_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_);
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (this->__has_value())
|
|
throw future_error(make_error_code(future_errc::promise_already_satisfied));
|
|
#endif
|
|
__value_ = _VSTD::addressof(__arg);
|
|
this->__state_ |= base::__constructed | base::ready;
|
|
__lk.unlock();
|
|
__cv_.notify_all();
|
|
}
|
|
|
|
template <class _Rp>
|
|
void
|
|
__assoc_state<_Rp&>::set_value_at_thread_exit(_Rp& __arg)
|
|
{
|
|
unique_lock<mutex> __lk(this->__mut_);
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (this->__has_value())
|
|
throw future_error(make_error_code(future_errc::promise_already_satisfied));
|
|
#endif
|
|
__value_ = _VSTD::addressof(__arg);
|
|
this->__state_ |= base::__constructed;
|
|
__thread_local_data()->__make_ready_at_thread_exit(this);
|
|
__lk.unlock();
|
|
}
|
|
|
|
template <class _Rp>
|
|
_Rp&
|
|
__assoc_state<_Rp&>::copy()
|
|
{
|
|
unique_lock<mutex> __lk(this->__mut_);
|
|
this->__sub_wait(__lk);
|
|
if (this->__exception_ != nullptr)
|
|
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_;
|
|
|
|
virtual void __on_zero_shared() _NOEXCEPT;
|
|
public:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
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*>(_VSTD::addressof(this->__value_))->~_Rp();
|
|
typedef typename __allocator_traits_rebind<_Alloc, __assoc_state_alloc>::type _A;
|
|
typedef allocator_traits<_A> _ATraits;
|
|
typedef pointer_traits<typename _ATraits::pointer> _PTraits;
|
|
_A __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_;
|
|
|
|
virtual void __on_zero_shared() _NOEXCEPT;
|
|
public:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
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 _A;
|
|
typedef allocator_traits<_A> _ATraits;
|
|
typedef pointer_traits<typename _ATraits::pointer> _PTraits;
|
|
_A __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_;
|
|
|
|
virtual void __on_zero_shared() _NOEXCEPT;
|
|
public:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
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 _A;
|
|
typedef allocator_traits<_A> _ATraits;
|
|
typedef pointer_traits<typename _ATraits::pointer> _PTraits;
|
|
_A __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:
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
explicit __deferred_assoc_state(_Fp&& __f);
|
|
#endif
|
|
|
|
virtual void __execute();
|
|
};
|
|
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
template <class _Rp, class _Fp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
__deferred_assoc_state<_Rp, _Fp>::__deferred_assoc_state(_Fp&& __f)
|
|
: __func_(_VSTD::forward<_Fp>(__f))
|
|
{
|
|
this->__set_deferred();
|
|
}
|
|
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
template <class _Rp, class _Fp>
|
|
void
|
|
__deferred_assoc_state<_Rp, _Fp>::__execute()
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try
|
|
{
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
this->set_value(__func_());
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
catch (...)
|
|
{
|
|
this->set_exception(current_exception());
|
|
}
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
|
|
template <class _Fp>
|
|
class __deferred_assoc_state<void, _Fp>
|
|
: public __assoc_sub_state
|
|
{
|
|
typedef __assoc_sub_state base;
|
|
|
|
_Fp __func_;
|
|
|
|
public:
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
explicit __deferred_assoc_state(_Fp&& __f);
|
|
#endif
|
|
|
|
virtual void __execute();
|
|
};
|
|
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
template <class _Fp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
__deferred_assoc_state<void, _Fp>::__deferred_assoc_state(_Fp&& __f)
|
|
: __func_(_VSTD::forward<_Fp>(__f))
|
|
{
|
|
this->__set_deferred();
|
|
}
|
|
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
template <class _Fp>
|
|
void
|
|
__deferred_assoc_state<void, _Fp>::__execute()
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try
|
|
{
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
__func_();
|
|
this->set_value();
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
catch (...)
|
|
{
|
|
this->set_exception(current_exception());
|
|
}
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
|
|
template <class _Rp, class _Fp>
|
|
class __async_assoc_state
|
|
: public __assoc_state<_Rp>
|
|
{
|
|
typedef __assoc_state<_Rp> base;
|
|
|
|
_Fp __func_;
|
|
|
|
virtual void __on_zero_shared() _NOEXCEPT;
|
|
public:
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
explicit __async_assoc_state(_Fp&& __f);
|
|
#endif
|
|
|
|
virtual void __execute();
|
|
};
|
|
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
template <class _Rp, class _Fp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
__async_assoc_state<_Rp, _Fp>::__async_assoc_state(_Fp&& __f)
|
|
: __func_(_VSTD::forward<_Fp>(__f))
|
|
{
|
|
}
|
|
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
template <class _Rp, class _Fp>
|
|
void
|
|
__async_assoc_state<_Rp, _Fp>::__execute()
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try
|
|
{
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
this->set_value(__func_());
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
catch (...)
|
|
{
|
|
this->set_exception(current_exception());
|
|
}
|
|
#endif // _LIBCPP_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_;
|
|
|
|
virtual void __on_zero_shared() _NOEXCEPT;
|
|
public:
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
explicit __async_assoc_state(_Fp&& __f);
|
|
#endif
|
|
|
|
virtual void __execute();
|
|
};
|
|
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
template <class _Fp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
__async_assoc_state<void, _Fp>::__async_assoc_state(_Fp&& __f)
|
|
: __func_(_VSTD::forward<_Fp>(__f))
|
|
{
|
|
}
|
|
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
template <class _Fp>
|
|
void
|
|
__async_assoc_state<void, _Fp>::__execute()
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try
|
|
{
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
__func_();
|
|
this->set_value();
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
catch (...)
|
|
{
|
|
this->set_exception(current_exception());
|
|
}
|
|
#endif // _LIBCPP_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_TYPE_VIS_ONLY promise;
|
|
template <class _Rp> class _LIBCPP_TYPE_VIS_ONLY shared_future;
|
|
|
|
// future
|
|
|
|
template <class _Rp> class _LIBCPP_TYPE_VIS_ONLY future;
|
|
|
|
template <class _Rp, class _Fp>
|
|
future<_Rp>
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
__make_deferred_assoc_state(_Fp&& __f);
|
|
#else
|
|
__make_deferred_assoc_state(_Fp __f);
|
|
#endif
|
|
|
|
template <class _Rp, class _Fp>
|
|
future<_Rp>
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
__make_async_assoc_state(_Fp&& __f);
|
|
#else
|
|
__make_async_assoc_state(_Fp __f);
|
|
#endif
|
|
|
|
template <class _Rp>
|
|
class _LIBCPP_TYPE_VIS_ONLY future
|
|
{
|
|
__assoc_state<_Rp>* __state_;
|
|
|
|
explicit future(__assoc_state<_Rp>* __state);
|
|
|
|
template <class> friend class promise;
|
|
template <class> friend class shared_future;
|
|
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
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);
|
|
#else
|
|
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);
|
|
#endif
|
|
|
|
public:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future() _NOEXCEPT : __state_(nullptr) {}
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future(future&& __rhs) _NOEXCEPT
|
|
: __state_(__rhs.__state_) {__rhs.__state_ = nullptr;}
|
|
future(const future&) = delete;
|
|
future& operator=(const future&) = delete;
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future& operator=(future&& __rhs) _NOEXCEPT
|
|
{
|
|
future(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
private:
|
|
future(const future&);
|
|
future& operator=(const future&);
|
|
public:
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
~future();
|
|
shared_future<_Rp> share();
|
|
|
|
// retrieving the value
|
|
_Rp get();
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void swap(future& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
|
|
|
// functions to check state
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool valid() const _NOEXCEPT {return __state_ != nullptr;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void wait() const {__state_->wait();}
|
|
template <class _Rep, class _Period>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future_status
|
|
wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const
|
|
{return __state_->wait_for(__rel_time);}
|
|
template <class _Clock, class _Duration>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
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)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_->__has_future_attached())
|
|
throw future_error(make_error_code(future_errc::future_already_retrieved));
|
|
#endif
|
|
__state_->__add_shared();
|
|
__state_->__set_future_attached();
|
|
}
|
|
|
|
struct __release_shared_count
|
|
{
|
|
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> __(__state_);
|
|
__assoc_state<_Rp>* __s = __state_;
|
|
__state_ = nullptr;
|
|
return __s->move();
|
|
}
|
|
|
|
template <class _Rp>
|
|
class _LIBCPP_TYPE_VIS_ONLY future<_Rp&>
|
|
{
|
|
__assoc_state<_Rp&>* __state_;
|
|
|
|
explicit future(__assoc_state<_Rp&>* __state);
|
|
|
|
template <class> friend class promise;
|
|
template <class> friend class shared_future;
|
|
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
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);
|
|
#else
|
|
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);
|
|
#endif
|
|
|
|
public:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future() _NOEXCEPT : __state_(nullptr) {}
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future(future&& __rhs) _NOEXCEPT
|
|
: __state_(__rhs.__state_) {__rhs.__state_ = nullptr;}
|
|
future(const future&) = delete;
|
|
future& operator=(const future&) = delete;
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future& operator=(future&& __rhs) _NOEXCEPT
|
|
{
|
|
future(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
private:
|
|
future(const future&);
|
|
future& operator=(const future&);
|
|
public:
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
~future();
|
|
shared_future<_Rp&> share();
|
|
|
|
// retrieving the value
|
|
_Rp& get();
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void swap(future& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
|
|
|
// functions to check state
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool valid() const _NOEXCEPT {return __state_ != nullptr;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void wait() const {__state_->wait();}
|
|
template <class _Rep, class _Period>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future_status
|
|
wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const
|
|
{return __state_->wait_for(__rel_time);}
|
|
template <class _Clock, class _Duration>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
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)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_->__has_future_attached())
|
|
throw future_error(make_error_code(future_errc::future_already_retrieved));
|
|
#endif
|
|
__state_->__add_shared();
|
|
__state_->__set_future_attached();
|
|
}
|
|
|
|
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> __(__state_);
|
|
__assoc_state<_Rp&>* __s = __state_;
|
|
__state_ = nullptr;
|
|
return __s->copy();
|
|
}
|
|
|
|
template <>
|
|
class _LIBCPP_TYPE_VIS future<void>
|
|
{
|
|
__assoc_sub_state* __state_;
|
|
|
|
explicit future(__assoc_sub_state* __state);
|
|
|
|
template <class> friend class promise;
|
|
template <class> friend class shared_future;
|
|
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
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);
|
|
#else
|
|
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);
|
|
#endif
|
|
|
|
public:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future() _NOEXCEPT : __state_(nullptr) {}
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future(future&& __rhs) _NOEXCEPT
|
|
: __state_(__rhs.__state_) {__rhs.__state_ = nullptr;}
|
|
future(const future&) = delete;
|
|
future& operator=(const future&) = delete;
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future& operator=(future&& __rhs) _NOEXCEPT
|
|
{
|
|
future(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
private:
|
|
future(const future&);
|
|
future& operator=(const future&);
|
|
public:
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
~future();
|
|
shared_future<void> share();
|
|
|
|
// retrieving the value
|
|
void get();
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void swap(future& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
|
|
|
// functions to check state
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool valid() const _NOEXCEPT {return __state_ != nullptr;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void wait() const {__state_->wait();}
|
|
template <class _Rep, class _Period>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future_status
|
|
wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const
|
|
{return __state_->wait_for(__rel_time);}
|
|
template <class _Clock, class _Duration>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future_status
|
|
wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const
|
|
{return __state_->wait_until(__abs_time);}
|
|
};
|
|
|
|
template <class _Rp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
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_TYPE_VIS_ONLY promise
|
|
{
|
|
__assoc_state<_Rp>* __state_;
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
explicit promise(nullptr_t) _NOEXCEPT : __state_(nullptr) {}
|
|
|
|
template <class> friend class packaged_task;
|
|
public:
|
|
promise();
|
|
template <class _Alloc>
|
|
promise(allocator_arg_t, const _Alloc& __a);
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
promise(promise&& __rhs) _NOEXCEPT
|
|
: __state_(__rhs.__state_) {__rhs.__state_ = nullptr;}
|
|
promise(const promise& __rhs) = delete;
|
|
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
private:
|
|
promise(const promise& __rhs);
|
|
public:
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
~promise();
|
|
|
|
// assignment
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
promise& operator=(promise&& __rhs) _NOEXCEPT
|
|
{
|
|
promise(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
promise& operator=(const promise& __rhs) = delete;
|
|
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
private:
|
|
promise& operator=(const promise& __rhs);
|
|
public:
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void swap(promise& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
|
|
|
// retrieving the result
|
|
future<_Rp> get_future();
|
|
|
|
// setting the result
|
|
void set_value(const _Rp& __r);
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
void set_value(_Rp&& __r);
|
|
#endif
|
|
void set_exception(exception_ptr __p);
|
|
|
|
// setting the result with deferred notification
|
|
void set_value_at_thread_exit(const _Rp& __r);
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
void set_value_at_thread_exit(_Rp&& __r);
|
|
#endif
|
|
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(static_cast<void*>(_VSTD::addressof(*__hold.get()))) _State(__a0);
|
|
__state_ = _VSTD::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()
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif
|
|
return future<_Rp>(__state_);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void
|
|
promise<_Rp>::set_value(const _Rp& __r)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif
|
|
__state_->set_value(__r);
|
|
}
|
|
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
template <class _Rp>
|
|
void
|
|
promise<_Rp>::set_value(_Rp&& __r)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif
|
|
__state_->set_value(_VSTD::move(__r));
|
|
}
|
|
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
template <class _Rp>
|
|
void
|
|
promise<_Rp>::set_exception(exception_ptr __p)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif
|
|
__state_->set_exception(__p);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void
|
|
promise<_Rp>::set_value_at_thread_exit(const _Rp& __r)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif
|
|
__state_->set_value_at_thread_exit(__r);
|
|
}
|
|
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
template <class _Rp>
|
|
void
|
|
promise<_Rp>::set_value_at_thread_exit(_Rp&& __r)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif
|
|
__state_->set_value_at_thread_exit(_VSTD::move(__r));
|
|
}
|
|
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
template <class _Rp>
|
|
void
|
|
promise<_Rp>::set_exception_at_thread_exit(exception_ptr __p)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif
|
|
__state_->set_exception_at_thread_exit(__p);
|
|
}
|
|
|
|
// promise<R&>
|
|
|
|
template <class _Rp>
|
|
class _LIBCPP_TYPE_VIS_ONLY promise<_Rp&>
|
|
{
|
|
__assoc_state<_Rp&>* __state_;
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
explicit promise(nullptr_t) _NOEXCEPT : __state_(nullptr) {}
|
|
|
|
template <class> friend class packaged_task;
|
|
|
|
public:
|
|
promise();
|
|
template <class _Allocator>
|
|
promise(allocator_arg_t, const _Allocator& __a);
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
promise(promise&& __rhs) _NOEXCEPT
|
|
: __state_(__rhs.__state_) {__rhs.__state_ = nullptr;}
|
|
promise(const promise& __rhs) = delete;
|
|
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
private:
|
|
promise(const promise& __rhs);
|
|
public:
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
~promise();
|
|
|
|
// assignment
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
promise& operator=(promise&& __rhs) _NOEXCEPT
|
|
{
|
|
promise(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
promise& operator=(const promise& __rhs) = delete;
|
|
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
private:
|
|
promise& operator=(const promise& __rhs);
|
|
public:
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void swap(promise& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
|
|
|
// retrieving the result
|
|
future<_Rp&> get_future();
|
|
|
|
// setting the result
|
|
void set_value(_Rp& __r);
|
|
void set_exception(exception_ptr __p);
|
|
|
|
// setting the result with deferred notification
|
|
void set_value_at_thread_exit(_Rp&);
|
|
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(static_cast<void*>(_VSTD::addressof(*__hold.get()))) _State(__a0);
|
|
__state_ = _VSTD::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()
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif
|
|
return future<_Rp&>(__state_);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void
|
|
promise<_Rp&>::set_value(_Rp& __r)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif
|
|
__state_->set_value(__r);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void
|
|
promise<_Rp&>::set_exception(exception_ptr __p)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif
|
|
__state_->set_exception(__p);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void
|
|
promise<_Rp&>::set_value_at_thread_exit(_Rp& __r)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif
|
|
__state_->set_value_at_thread_exit(__r);
|
|
}
|
|
|
|
template <class _Rp>
|
|
void
|
|
promise<_Rp&>::set_exception_at_thread_exit(exception_ptr __p)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif
|
|
__state_->set_exception_at_thread_exit(__p);
|
|
}
|
|
|
|
// promise<void>
|
|
|
|
template <>
|
|
class _LIBCPP_TYPE_VIS promise<void>
|
|
{
|
|
__assoc_sub_state* __state_;
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
explicit promise(nullptr_t) _NOEXCEPT : __state_(nullptr) {}
|
|
|
|
template <class> friend class packaged_task;
|
|
|
|
public:
|
|
promise();
|
|
template <class _Allocator>
|
|
promise(allocator_arg_t, const _Allocator& __a);
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
promise(promise&& __rhs) _NOEXCEPT
|
|
: __state_(__rhs.__state_) {__rhs.__state_ = nullptr;}
|
|
promise(const promise& __rhs) = delete;
|
|
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
private:
|
|
promise(const promise& __rhs);
|
|
public:
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
~promise();
|
|
|
|
// assignment
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
promise& operator=(promise&& __rhs) _NOEXCEPT
|
|
{
|
|
promise(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
promise& operator=(const promise& __rhs) = delete;
|
|
#else // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
private:
|
|
promise& operator=(const promise& __rhs);
|
|
public:
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void swap(promise& __rhs) _NOEXCEPT {_VSTD::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(static_cast<void*>(_VSTD::addressof(*__hold.get()))) _State(__a0);
|
|
__state_ = _VSTD::addressof(*__hold.release());
|
|
}
|
|
|
|
template <class _Rp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
swap(promise<_Rp>& __x, promise<_Rp>& __y) _NOEXCEPT
|
|
{
|
|
__x.swap(__y);
|
|
}
|
|
|
|
template <class _Rp, class _Alloc>
|
|
struct _LIBCPP_TYPE_VIS_ONLY uses_allocator<promise<_Rp>, _Alloc>
|
|
: public true_type {};
|
|
|
|
#ifndef _LIBCPP_HAS_NO_VARIADICS
|
|
|
|
// 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_INLINE_VISIBILITY
|
|
__packaged_task_base() {}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
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_INLINE_VISIBILITY
|
|
explicit __packaged_task_func(const _Fp& __f) : __f_(__f) {}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
explicit __packaged_task_func(_Fp&& __f) : __f_(_VSTD::move(__f)) {}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
__packaged_task_func(const _Fp& __f, const _Alloc& __a)
|
|
: __f_(__f, __a) {}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
__packaged_task_func(_Fp&& __f, const _Alloc& __a)
|
|
: __f_(_VSTD::move(__f), __a) {}
|
|
virtual void __move_to(__packaged_task_base<_Rp(_ArgTypes...)>*) _NOEXCEPT;
|
|
virtual void destroy();
|
|
virtual void destroy_deallocate();
|
|
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 (__p) __packaged_task_func(_VSTD::move(__f_.first()), _VSTD::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 __invoke(__f_.first(), _VSTD::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;
|
|
typename aligned_storage<3*sizeof(void*)>::type __buf_;
|
|
__base* __f_;
|
|
|
|
public:
|
|
typedef _Rp result_type;
|
|
|
|
// construct/copy/destroy:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
__packaged_task_function() _NOEXCEPT : __f_(nullptr) {}
|
|
template<class _Fp>
|
|
__packaged_task_function(_Fp&& __f);
|
|
template<class _Fp, class _Alloc>
|
|
__packaged_task_function(allocator_arg_t, const _Alloc& __a, _Fp&& __f);
|
|
|
|
__packaged_task_function(__packaged_task_function&&) _NOEXCEPT;
|
|
__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;
|
|
|
|
~__packaged_task_function();
|
|
|
|
void swap(__packaged_task_function&) _NOEXCEPT;
|
|
|
|
_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_ == (__base*)&__f.__buf_)
|
|
{
|
|
__f_ = (__base*)&__buf_;
|
|
__f.__f_->__move_to(__f_);
|
|
}
|
|
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 typename remove_reference<typename decay<_Fp>::type>::type _FR;
|
|
typedef __packaged_task_func<_FR, allocator<_FR>, _Rp(_ArgTypes...)> _FF;
|
|
if (sizeof(_FF) <= sizeof(__buf_))
|
|
{
|
|
__f_ = (__base*)&__buf_;
|
|
::new (__f_) _FF(_VSTD::forward<_Fp>(__f));
|
|
}
|
|
else
|
|
{
|
|
typedef allocator<_FF> _Ap;
|
|
_Ap __a;
|
|
typedef __allocator_destructor<_Ap> _Dp;
|
|
unique_ptr<__base, _Dp> __hold(__a.allocate(1), _Dp(__a, 1));
|
|
::new (__hold.get()) _FF(_VSTD::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 typename remove_reference<typename decay<_Fp>::type>::type _FR;
|
|
typedef __packaged_task_func<_FR, _Alloc, _Rp(_ArgTypes...)> _FF;
|
|
if (sizeof(_FF) <= sizeof(__buf_))
|
|
{
|
|
__f_ = (__base*)&__buf_;
|
|
::new (__f_) _FF(_VSTD::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 (static_cast<void*>(_VSTD::addressof(*__hold.get())))
|
|
_FF(_VSTD::forward<_Fp>(__f), _Alloc(__a));
|
|
__f_ = _VSTD::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_ == (__base*)&__buf_)
|
|
__f_->destroy();
|
|
else if (__f_)
|
|
__f_->destroy_deallocate();
|
|
__f_ = nullptr;
|
|
if (__f.__f_ == nullptr)
|
|
__f_ = nullptr;
|
|
else if (__f.__f_ == (__base*)&__f.__buf_)
|
|
{
|
|
__f_ = (__base*)&__buf_;
|
|
__f.__f_->__move_to(__f_);
|
|
}
|
|
else
|
|
{
|
|
__f_ = __f.__f_;
|
|
__f.__f_ = nullptr;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
template<class _Rp, class ..._ArgTypes>
|
|
__packaged_task_function<_Rp(_ArgTypes...)>::~__packaged_task_function()
|
|
{
|
|
if (__f_ == (__base*)&__buf_)
|
|
__f_->destroy();
|
|
else if (__f_)
|
|
__f_->destroy_deallocate();
|
|
}
|
|
|
|
template<class _Rp, class ..._ArgTypes>
|
|
void
|
|
__packaged_task_function<_Rp(_ArgTypes...)>::swap(__packaged_task_function& __f) _NOEXCEPT
|
|
{
|
|
if (__f_ == (__base*)&__buf_ && __f.__f_ == (__base*)&__f.__buf_)
|
|
{
|
|
typename aligned_storage<sizeof(__buf_)>::type __tempbuf;
|
|
__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
|
|
_VSTD::swap(__f_, __f.__f_);
|
|
}
|
|
|
|
template<class _Rp, class ..._ArgTypes>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
_Rp
|
|
__packaged_task_function<_Rp(_ArgTypes...)>::operator()(_ArgTypes... __arg) const
|
|
{
|
|
return (*__f_)(_VSTD::forward<_ArgTypes>(__arg)...);
|
|
}
|
|
|
|
template<class _Rp, class ..._ArgTypes>
|
|
class _LIBCPP_TYPE_VIS_ONLY packaged_task<_Rp(_ArgTypes...)>
|
|
{
|
|
public:
|
|
typedef _Rp result_type;
|
|
|
|
private:
|
|
__packaged_task_function<result_type(_ArgTypes...)> __f_;
|
|
promise<result_type> __p_;
|
|
|
|
public:
|
|
// construction and destruction
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
packaged_task() _NOEXCEPT : __p_(nullptr) {}
|
|
template <class _Fp,
|
|
class = typename enable_if
|
|
<
|
|
!is_same<
|
|
typename decay<_Fp>::type,
|
|
packaged_task
|
|
>::value
|
|
>::type
|
|
>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
explicit packaged_task(_Fp&& __f) : __f_(_VSTD::forward<_Fp>(__f)) {}
|
|
template <class _Fp, class _Allocator,
|
|
class = typename enable_if
|
|
<
|
|
!is_same<
|
|
typename decay<_Fp>::type,
|
|
packaged_task
|
|
>::value
|
|
>::type
|
|
>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
explicit packaged_task(allocator_arg_t, const _Allocator& __a, _Fp&& __f)
|
|
: __f_(allocator_arg, __a, _VSTD::forward<_Fp>(__f)),
|
|
__p_(allocator_arg, __a) {}
|
|
// ~packaged_task() = default;
|
|
|
|
// no copy
|
|
packaged_task(const packaged_task&) = delete;
|
|
packaged_task& operator=(const packaged_task&) = delete;
|
|
|
|
// move support
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
packaged_task(packaged_task&& __other) _NOEXCEPT
|
|
: __f_(_VSTD::move(__other.__f_)), __p_(_VSTD::move(__other.__p_)) {}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
packaged_task& operator=(packaged_task&& __other) _NOEXCEPT
|
|
{
|
|
__f_ = _VSTD::move(__other.__f_);
|
|
__p_ = _VSTD::move(__other.__p_);
|
|
return *this;
|
|
}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void swap(packaged_task& __other) _NOEXCEPT
|
|
{
|
|
__f_.swap(__other.__f_);
|
|
__p_.swap(__other.__p_);
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool valid() const _NOEXCEPT {return __p_.__state_ != nullptr;}
|
|
|
|
// result retrieval
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future<result_type> get_future() {return __p_.get_future();}
|
|
|
|
// execution
|
|
void operator()(_ArgTypes... __args);
|
|
void make_ready_at_thread_exit(_ArgTypes... __args);
|
|
|
|
void reset();
|
|
};
|
|
|
|
template<class _Rp, class ..._ArgTypes>
|
|
void
|
|
packaged_task<_Rp(_ArgTypes...)>::operator()(_ArgTypes... __args)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__p_.__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
if (__p_.__state_->__has_value())
|
|
throw future_error(make_error_code(future_errc::promise_already_satisfied));
|
|
try
|
|
{
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
__p_.set_value(__f_(_VSTD::forward<_ArgTypes>(__args)...));
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
catch (...)
|
|
{
|
|
__p_.set_exception(current_exception());
|
|
}
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
|
|
template<class _Rp, class ..._ArgTypes>
|
|
void
|
|
packaged_task<_Rp(_ArgTypes...)>::make_ready_at_thread_exit(_ArgTypes... __args)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__p_.__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
if (__p_.__state_->__has_value())
|
|
throw future_error(make_error_code(future_errc::promise_already_satisfied));
|
|
try
|
|
{
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
__p_.set_value_at_thread_exit(__f_(_VSTD::forward<_ArgTypes>(__args)...));
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
catch (...)
|
|
{
|
|
__p_.set_exception_at_thread_exit(current_exception());
|
|
}
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
|
|
template<class _Rp, class ..._ArgTypes>
|
|
void
|
|
packaged_task<_Rp(_ArgTypes...)>::reset()
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (!valid())
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
__p_ = promise<result_type>();
|
|
}
|
|
|
|
template<class ..._ArgTypes>
|
|
class _LIBCPP_TYPE_VIS_ONLY packaged_task<void(_ArgTypes...)>
|
|
{
|
|
public:
|
|
typedef void result_type;
|
|
|
|
private:
|
|
__packaged_task_function<result_type(_ArgTypes...)> __f_;
|
|
promise<result_type> __p_;
|
|
|
|
public:
|
|
// construction and destruction
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
packaged_task() _NOEXCEPT : __p_(nullptr) {}
|
|
template <class _Fp,
|
|
class = typename enable_if
|
|
<
|
|
!is_same<
|
|
typename decay<_Fp>::type,
|
|
packaged_task
|
|
>::value
|
|
>::type
|
|
>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
explicit packaged_task(_Fp&& __f) : __f_(_VSTD::forward<_Fp>(__f)) {}
|
|
template <class _Fp, class _Allocator,
|
|
class = typename enable_if
|
|
<
|
|
!is_same<
|
|
typename decay<_Fp>::type,
|
|
packaged_task
|
|
>::value
|
|
>::type
|
|
>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
explicit packaged_task(allocator_arg_t, const _Allocator& __a, _Fp&& __f)
|
|
: __f_(allocator_arg, __a, _VSTD::forward<_Fp>(__f)),
|
|
__p_(allocator_arg, __a) {}
|
|
// ~packaged_task() = default;
|
|
|
|
// no copy
|
|
packaged_task(const packaged_task&) = delete;
|
|
packaged_task& operator=(const packaged_task&) = delete;
|
|
|
|
// move support
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
packaged_task(packaged_task&& __other) _NOEXCEPT
|
|
: __f_(_VSTD::move(__other.__f_)), __p_(_VSTD::move(__other.__p_)) {}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
packaged_task& operator=(packaged_task&& __other) _NOEXCEPT
|
|
{
|
|
__f_ = _VSTD::move(__other.__f_);
|
|
__p_ = _VSTD::move(__other.__p_);
|
|
return *this;
|
|
}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void swap(packaged_task& __other) _NOEXCEPT
|
|
{
|
|
__f_.swap(__other.__f_);
|
|
__p_.swap(__other.__p_);
|
|
}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool valid() const _NOEXCEPT {return __p_.__state_ != nullptr;}
|
|
|
|
// result retrieval
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future<result_type> get_future() {return __p_.get_future();}
|
|
|
|
// execution
|
|
void operator()(_ArgTypes... __args);
|
|
void make_ready_at_thread_exit(_ArgTypes... __args);
|
|
|
|
void reset();
|
|
};
|
|
|
|
template<class ..._ArgTypes>
|
|
void
|
|
packaged_task<void(_ArgTypes...)>::operator()(_ArgTypes... __args)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__p_.__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
if (__p_.__state_->__has_value())
|
|
throw future_error(make_error_code(future_errc::promise_already_satisfied));
|
|
try
|
|
{
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
__f_(_VSTD::forward<_ArgTypes>(__args)...);
|
|
__p_.set_value();
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
catch (...)
|
|
{
|
|
__p_.set_exception(current_exception());
|
|
}
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
|
|
template<class ..._ArgTypes>
|
|
void
|
|
packaged_task<void(_ArgTypes...)>::make_ready_at_thread_exit(_ArgTypes... __args)
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (__p_.__state_ == nullptr)
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
if (__p_.__state_->__has_value())
|
|
throw future_error(make_error_code(future_errc::promise_already_satisfied));
|
|
try
|
|
{
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
__f_(_VSTD::forward<_ArgTypes>(__args)...);
|
|
__p_.set_value_at_thread_exit();
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
catch (...)
|
|
{
|
|
__p_.set_exception_at_thread_exit(current_exception());
|
|
}
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
|
|
template<class ..._ArgTypes>
|
|
void
|
|
packaged_task<void(_ArgTypes...)>::reset()
|
|
{
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
if (!valid())
|
|
throw future_error(make_error_code(future_errc::no_state));
|
|
#endif // _LIBCPP_NO_EXCEPTIONS
|
|
__p_ = promise<result_type>();
|
|
}
|
|
|
|
template <class _Callable>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
swap(packaged_task<_Callable>& __x, packaged_task<_Callable>& __y) _NOEXCEPT
|
|
{
|
|
__x.swap(__y);
|
|
}
|
|
|
|
template <class _Callable, class _Alloc>
|
|
struct _LIBCPP_TYPE_VIS_ONLY uses_allocator<packaged_task<_Callable>, _Alloc>
|
|
: public true_type {};
|
|
|
|
template <class _Rp, class _Fp>
|
|
future<_Rp>
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
__make_deferred_assoc_state(_Fp&& __f)
|
|
#else
|
|
__make_deferred_assoc_state(_Fp __f)
|
|
#endif
|
|
{
|
|
unique_ptr<__deferred_assoc_state<_Rp, _Fp>, __release_shared_count>
|
|
__h(new __deferred_assoc_state<_Rp, _Fp>(_VSTD::forward<_Fp>(__f)));
|
|
return future<_Rp>(__h.get());
|
|
}
|
|
|
|
template <class _Rp, class _Fp>
|
|
future<_Rp>
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
__make_async_assoc_state(_Fp&& __f)
|
|
#else
|
|
__make_async_assoc_state(_Fp __f)
|
|
#endif
|
|
{
|
|
unique_ptr<__async_assoc_state<_Rp, _Fp>, __release_shared_count>
|
|
__h(new __async_assoc_state<_Rp, _Fp>(_VSTD::forward<_Fp>(__f)));
|
|
_VSTD::thread(&__async_assoc_state<_Rp, _Fp>::__execute, __h.get()).detach();
|
|
return future<_Rp>(__h.get());
|
|
}
|
|
|
|
template <class _Fp, class... _Args>
|
|
class __async_func
|
|
{
|
|
tuple<_Fp, _Args...> __f_;
|
|
|
|
public:
|
|
typedef typename __invoke_of<_Fp, _Args...>::type _Rp;
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
explicit __async_func(_Fp&& __f, _Args&&... __args)
|
|
: __f_(_VSTD::move(__f), _VSTD::move(__args)...) {}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
__async_func(__async_func&& __f) : __f_(_VSTD::move(__f.__f_)) {}
|
|
|
|
_Rp operator()()
|
|
{
|
|
typedef typename __make_tuple_indices<1+sizeof...(_Args), 1>::type _Index;
|
|
return __execute(_Index());
|
|
}
|
|
private:
|
|
template <size_t ..._Indices>
|
|
_Rp
|
|
__execute(__tuple_indices<_Indices...>)
|
|
{
|
|
return __invoke(_VSTD::move(_VSTD::get<0>(__f_)), _VSTD::move(_VSTD::get<_Indices>(__f_))...);
|
|
}
|
|
};
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY bool __does_policy_contain(launch __policy, launch __value )
|
|
{ return (int(__policy) & int(__value)) != 0; }
|
|
|
|
template <class _Fp, class... _Args>
|
|
future<typename __invoke_of<typename decay<_Fp>::type, typename decay<_Args>::type...>::type>
|
|
async(launch __policy, _Fp&& __f, _Args&&... __args)
|
|
{
|
|
typedef __async_func<typename decay<_Fp>::type, typename decay<_Args>::type...> _BF;
|
|
typedef typename _BF::_Rp _Rp;
|
|
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
try
|
|
{
|
|
#endif
|
|
if (__does_policy_contain(__policy, launch::async))
|
|
return _VSTD::__make_async_assoc_state<_Rp>(_BF(__decay_copy(_VSTD::forward<_Fp>(__f)),
|
|
__decay_copy(_VSTD::forward<_Args>(__args))...));
|
|
#ifndef _LIBCPP_NO_EXCEPTIONS
|
|
}
|
|
catch ( ... ) { if (__policy == launch::async) throw ; }
|
|
#endif
|
|
|
|
if (__does_policy_contain(__policy, launch::deferred))
|
|
return _VSTD::__make_deferred_assoc_state<_Rp>(_BF(__decay_copy(_VSTD::forward<_Fp>(__f)),
|
|
__decay_copy(_VSTD::forward<_Args>(__args))...));
|
|
return future<_Rp>{};
|
|
}
|
|
|
|
template <class _Fp, class... _Args>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
future<typename __invoke_of<typename decay<_Fp>::type, typename decay<_Args>::type...>::type>
|
|
async(_Fp&& __f, _Args&&... __args)
|
|
{
|
|
return _VSTD::async(launch::any, _VSTD::forward<_Fp>(__f),
|
|
_VSTD::forward<_Args>(__args)...);
|
|
}
|
|
|
|
#endif // _LIBCPP_HAS_NO_VARIADICS
|
|
|
|
// shared_future
|
|
|
|
template <class _Rp>
|
|
class _LIBCPP_TYPE_VIS_ONLY shared_future
|
|
{
|
|
__assoc_state<_Rp>* __state_;
|
|
|
|
public:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future() _NOEXCEPT : __state_(nullptr) {}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future(const shared_future& __rhs) : __state_(__rhs.__state_)
|
|
{if (__state_) __state_->__add_shared();}
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future(future<_Rp>&& __f) _NOEXCEPT : __state_(__f.__state_)
|
|
{__f.__state_ = nullptr;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future(shared_future&& __rhs) _NOEXCEPT : __state_(__rhs.__state_)
|
|
{__rhs.__state_ = nullptr;}
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
~shared_future();
|
|
shared_future& operator=(const shared_future& __rhs);
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future& operator=(shared_future&& __rhs) _NOEXCEPT
|
|
{
|
|
shared_future(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
// retrieving the value
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
const _Rp& get() const {return __state_->copy();}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void swap(shared_future& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
|
|
|
// functions to check state
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool valid() const _NOEXCEPT {return __state_ != nullptr;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void wait() const {__state_->wait();}
|
|
template <class _Rep, class _Period>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future_status
|
|
wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const
|
|
{return __state_->wait_for(__rel_time);}
|
|
template <class _Clock, class _Duration>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
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 _Rp>
|
|
class _LIBCPP_TYPE_VIS_ONLY shared_future<_Rp&>
|
|
{
|
|
__assoc_state<_Rp&>* __state_;
|
|
|
|
public:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future() _NOEXCEPT : __state_(nullptr) {}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future(const shared_future& __rhs) : __state_(__rhs.__state_)
|
|
{if (__state_) __state_->__add_shared();}
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future(future<_Rp&>&& __f) _NOEXCEPT : __state_(__f.__state_)
|
|
{__f.__state_ = nullptr;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future(shared_future&& __rhs) _NOEXCEPT : __state_(__rhs.__state_)
|
|
{__rhs.__state_ = nullptr;}
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
~shared_future();
|
|
shared_future& operator=(const shared_future& __rhs);
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future& operator=(shared_future&& __rhs) _NOEXCEPT
|
|
{
|
|
shared_future(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
// retrieving the value
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
_Rp& get() const {return __state_->copy();}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void swap(shared_future& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
|
|
|
// functions to check state
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool valid() const _NOEXCEPT {return __state_ != nullptr;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void wait() const {__state_->wait();}
|
|
template <class _Rep, class _Period>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future_status
|
|
wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const
|
|
{return __state_->wait_for(__rel_time);}
|
|
template <class _Clock, class _Duration>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
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_TYPE_VIS shared_future<void>
|
|
{
|
|
__assoc_sub_state* __state_;
|
|
|
|
public:
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future() _NOEXCEPT : __state_(nullptr) {}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future(const shared_future& __rhs) : __state_(__rhs.__state_)
|
|
{if (__state_) __state_->__add_shared();}
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future(future<void>&& __f) _NOEXCEPT : __state_(__f.__state_)
|
|
{__f.__state_ = nullptr;}
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future(shared_future&& __rhs) _NOEXCEPT : __state_(__rhs.__state_)
|
|
{__rhs.__state_ = nullptr;}
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
~shared_future();
|
|
shared_future& operator=(const shared_future& __rhs);
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
shared_future& operator=(shared_future&& __rhs) _NOEXCEPT
|
|
{
|
|
shared_future(std::move(__rhs)).swap(*this);
|
|
return *this;
|
|
}
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
// retrieving the value
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void get() const {__state_->copy();}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void swap(shared_future& __rhs) _NOEXCEPT {_VSTD::swap(__state_, __rhs.__state_);}
|
|
|
|
// functions to check state
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
bool valid() const _NOEXCEPT {return __state_ != nullptr;}
|
|
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
void wait() const {__state_->wait();}
|
|
template <class _Rep, class _Period>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future_status
|
|
wait_for(const chrono::duration<_Rep, _Period>& __rel_time) const
|
|
{return __state_->wait_for(__rel_time);}
|
|
template <class _Clock, class _Duration>
|
|
_LIBCPP_INLINE_VISIBILITY
|
|
future_status
|
|
wait_until(const chrono::time_point<_Clock, _Duration>& __abs_time) const
|
|
{return __state_->wait_until(__abs_time);}
|
|
};
|
|
|
|
template <class _Rp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
void
|
|
swap(shared_future<_Rp>& __x, shared_future<_Rp>& __y) _NOEXCEPT
|
|
{
|
|
__x.swap(__y);
|
|
}
|
|
|
|
template <class _Rp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
shared_future<_Rp>
|
|
future<_Rp>::share()
|
|
{
|
|
return shared_future<_Rp>(_VSTD::move(*this));
|
|
}
|
|
|
|
template <class _Rp>
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
shared_future<_Rp&>
|
|
future<_Rp&>::share()
|
|
{
|
|
return shared_future<_Rp&>(_VSTD::move(*this));
|
|
}
|
|
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
inline _LIBCPP_INLINE_VISIBILITY
|
|
shared_future<void>
|
|
future<void>::share()
|
|
{
|
|
return shared_future<void>(_VSTD::move(*this));
|
|
}
|
|
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
#endif // !_LIBCPP_HAS_NO_THREADS
|
|
|
|
#endif // _LIBCPP_FUTURE
|