e78f53d1e8
This reverts commit 68c04b0ae6.
This disables the IWYU mapping that caused the failure, since
the headers aren't reachable for now.
This is the first part of the "Freezing C++03 headers" proposal
explained in
https://discourse.llvm.org/t/rfc-freezing-c-03-headers-in-libc/77319/58.
This patch mechanically copies the headers as of the LLVM 19.1 release
into a subdirectory of libc++ so that we can start using these headers
when building in C++03 mode. We are going to be backporting important
changes to that copy of the headers until the LLVM 21 release. After the
LLVM 21 release, only critical bugfixes will be fixed in the C++03 copy
of the headers.
This patch only performs a copy of the headers -- these headers are
still unused by the rest of the codebase.
75 lines
2.3 KiB
C++
75 lines
2.3 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_THIS_THREAD_H
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#define _LIBCPP___THREAD_THIS_THREAD_H
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#include <__chrono/steady_clock.h>
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#include <__chrono/time_point.h>
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#include <__condition_variable/condition_variable.h>
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#include <__config>
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#include <__mutex/mutex.h>
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#include <__mutex/unique_lock.h>
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#include <__thread/support.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_PUSH_MACROS
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#include <__undef_macros>
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_LIBCPP_BEGIN_NAMESPACE_STD
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namespace this_thread {
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_LIBCPP_EXPORTED_FROM_ABI void sleep_for(const chrono::nanoseconds& __ns);
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template <class _Rep, class _Period>
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_LIBCPP_HIDE_FROM_ABI void sleep_for(const chrono::duration<_Rep, _Period>& __d) {
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if (__d > chrono::duration<_Rep, _Period>::zero()) {
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// The standard guarantees a 64bit signed integer resolution for nanoseconds,
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// so use INT64_MAX / 1e9 as cut-off point. Use a constant to avoid <climits>
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// and issues with long double folding on PowerPC with GCC.
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_LIBCPP_CONSTEXPR chrono::duration<long double> __max = chrono::duration<long double>(9223372036.0L);
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chrono::nanoseconds __ns;
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if (__d < __max) {
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__ns = chrono::duration_cast<chrono::nanoseconds>(__d);
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if (__ns < __d)
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++__ns;
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} else
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__ns = chrono::nanoseconds::max();
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this_thread::sleep_for(__ns);
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}
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}
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template <class _Clock, class _Duration>
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_LIBCPP_HIDE_FROM_ABI void sleep_until(const chrono::time_point<_Clock, _Duration>& __t) {
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mutex __mut;
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condition_variable __cv;
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unique_lock<mutex> __lk(__mut);
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while (_Clock::now() < __t)
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__cv.wait_until(__lk, __t);
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}
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template <class _Duration>
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inline _LIBCPP_HIDE_FROM_ABI void sleep_until(const chrono::time_point<chrono::steady_clock, _Duration>& __t) {
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this_thread::sleep_for(__t - chrono::steady_clock::now());
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}
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inline _LIBCPP_HIDE_FROM_ABI void yield() _NOEXCEPT { __libcpp_thread_yield(); }
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} // namespace this_thread
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_LIBCPP_END_NAMESPACE_STD
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___THREAD_THIS_THREAD_H
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