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++ // Copyright (C) 2026 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
++ // Qt-Security score:significant reason:default
++
++ #ifndef Q20ATOMIC_H
++ #define Q20ATOMIC_H
++
++ #include <QtCore/qtconfigmacros.h>
++
++ #include <atomic>
++
++ //
++ // W A R N I N G
++ // -------------
++ //
++ // This file is not part of the Qt API. Types and functions defined in this
++ // file can reliably be replaced by their std counterparts, once available.
++ // You may use these definitions in your own code, but be aware that we
++ // will remove them once Qt depends on the C++ version that supports
++ // them in namespace std. There will be NO deprecation warning, the
++ // definitions will JUST go away.
++ //
++ // If you can't agree to these terms, don't use these definitions!
++ //
++ // We mean it.
++ //
++
++ QT_BEGIN_NAMESPACE
++
++ namespace q20 {
++
++ // This only ensures fixed initialization, nothing else (e.g. no wait/notify):
++ #ifdef __cpp_lib_atomic_value_initialization
++ template <class T>
++ using atomic = std::atomic<T>;
++ #else
++ template <class T>
++ class atomic : public std::atomic<T>
++ {
++ public:
++ using std::atomic<T>::atomic;
++ constexpr atomic() noexcept(noexcept(std::atomic<T>(T()))) : std::atomic<T>(T()) { }
++ };
++
++ template <class T>
++ atomic(T) -> atomic<T>;
++ #endif
++
++ } // namespace q20
++
++ QT_END_NAMESPACE
++
++ #endif /* Q20ATOMIC_H */