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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
++
++ #ifndef QWIN32TICKS_P_H
++ #define QWIN32TICKS_P_H
++
++ //
++ // W A R N I N G
++ // -------------
++ //
++ // This file is not part of the Qt API. It exists purely as an
++ // implementation detail. This header file may change from version to
++ // version without notice, or even be removed.
++ //
++ // We mean it.
++ //
++
++ #include <QtCore/qglobal.h>
++
++ #include <chrono>
++
++ QT_BEGIN_NAMESPACE
++
++ namespace QtPrivate {
++
++ // Win32 ticks: a 100 nanosecond period, as used e.g. by REFERENCE_TIME
++ // (DirectShow, Media Foundation), FILETIME, and SetWaitableTimerEx.
++ using win32_ticks = std::chrono::duration<qint64, std::ratio<1, 10'000'000>>;
++
++ static_assert(win32_ticks(1) == std::chrono::nanoseconds(100));
++
++ } // namespace QtPrivate
++
++ QT_END_NAMESPACE
++
++ #endif // QWIN32TICKS_P_H