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b9a2658a3e
This patch implements the forwarding to frozen C++03 headers as discussed in https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc. In the RFC, we initially proposed selecting the right headers from the Clang driver, however consensus seemed to steer towards handling this in the library itself. This patch implements that direction. At a high level, the changes basically amount to making each public header look like this: ``` // inside <vector> #ifdef _LIBCPP_CXX03_LANG # include <__cxx03/vector> #else // normal <vector> content #endif ``` In most cases, public headers are simple umbrella headers so there isn't much code in the #else branch. In other cases, the #else branch contains the actual implementation of the header.
134 lines
3.2 KiB
C++
134 lines
3.2 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP_THREAD
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#define _LIBCPP_THREAD
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/*
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thread synopsis
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namespace std
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{
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class thread
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{
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public:
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class id;
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typedef pthread_t native_handle_type;
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thread() noexcept;
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template <class F, class ...Args> explicit thread(F&& f, Args&&... args);
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~thread();
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thread(const thread&) = delete;
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thread(thread&& t) noexcept;
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thread& operator=(const thread&) = delete;
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thread& operator=(thread&& t) noexcept;
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void swap(thread& t) noexcept;
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bool joinable() const noexcept;
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void join();
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void detach();
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id get_id() const noexcept;
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native_handle_type native_handle();
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static unsigned hardware_concurrency() noexcept;
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};
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void swap(thread& x, thread& y) noexcept;
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class thread::id
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{
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public:
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id() noexcept;
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};
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bool operator==(thread::id x, thread::id y) noexcept;
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bool operator!=(thread::id x, thread::id y) noexcept; // removed in C++20
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bool operator< (thread::id x, thread::id y) noexcept; // removed in C++20
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bool operator<=(thread::id x, thread::id y) noexcept; // removed in C++20
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bool operator> (thread::id x, thread::id y) noexcept; // removed in C++20
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bool operator>=(thread::id x, thread::id y) noexcept; // removed in C++20
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strong_ordering operator<=>(thread::id x, thread::id y) noexcept; // C++20
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template<class charT, class traits>
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basic_ostream<charT, traits>&
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operator<<(basic_ostream<charT, traits>& out, thread::id id);
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template<class charT>
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struct formatter<thread::id, charT>;
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namespace this_thread
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{
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thread::id get_id() noexcept;
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void yield() noexcept;
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template <class Clock, class Duration>
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void sleep_until(const chrono::time_point<Clock, Duration>& abs_time);
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template <class Rep, class Period>
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void sleep_for(const chrono::duration<Rep, Period>& rel_time);
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} // this_thread
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} // std
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*/
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#if __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
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# include <__cxx03/thread>
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#else
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# include <__config>
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# if _LIBCPP_HAS_THREADS
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# include <__thread/this_thread.h>
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# include <__thread/thread.h>
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# if _LIBCPP_STD_VER >= 20
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# include <__thread/jthread.h>
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# endif
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# if _LIBCPP_STD_VER >= 23
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# include <__thread/formatter.h>
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# endif
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# include <version>
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// standard-mandated includes
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// [thread.syn]
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# include <compare>
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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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# endif // _LIBCPP_HAS_THREADS
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# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 17
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# include <chrono>
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# endif
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# if !defined(_LIBCPP_REMOVE_TRANSITIVE_INCLUDES) && _LIBCPP_STD_VER <= 20
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# include <cstring>
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# include <functional>
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# include <new>
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# include <system_error>
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# include <type_traits>
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# endif
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#endif // __cplusplus < 201103L && defined(_LIBCPP_USE_FROZEN_CXX03_HEADERS)
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#endif // _LIBCPP_THREAD
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