9ddedf07ed
When we initially implemented the C++20 synchronization library, we reluctantly accepted for the implementation to be backported to C++03 upon request from the person who provided the patch. This was when we were only starting to have experience with the issues this can create, so we flinched. Nowadays, we have a much stricter stance about not backporting features to previous standards. We have recently started fixing several bugs (and near bugs) in our implementation of the synchronization library. A recurring theme during these reviews has been how difficult to understand the current code is, and upon inspection it becomes clear that being able to use a few recent C++ features (in particular lambdas) would help a great deal. The code would still be pretty intricate, but it would be a lot easier to reason about the flow of callbacks through things like __thread_poll_with_backoff. As a result, this patch deprecates support for the synchronization library before C++20. In the next release, we can remove that support entirely.
26 lines
877 B
C++
26 lines
877 B
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
//
|
|
// UNSUPPORTED: no-threads
|
|
// UNSUPPORTED: c++03, c++11
|
|
|
|
// Until we drop support for the synchronization library in C++11/14/17
|
|
// ADDITIONAL_COMPILE_FLAGS: -D_LIBCPP_DISABLE_DEPRECATION_WARNINGS
|
|
|
|
// <barrier>
|
|
|
|
// explicit barrier(ptrdiff_t __count, _CompletionF __completion = _CompletionF());
|
|
|
|
// Make sure that the ctor of barrier is explicit.
|
|
|
|
#include <barrier>
|
|
|
|
#include "test_convertible.h"
|
|
|
|
static_assert(!test_convertible<std::barrier<>, std::ptrdiff_t>(), "This constructor must be explicit");
|