1 | // Copyright (C) 2019 Klarälvdalens Datakonsult AB, a KDAB Group company, info@kdab.com, author Marc Mutz <marc.mutz@kdab.com> |
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2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
3 | #ifndef QWAITCONDITION_P_H |
4 | #define QWAITCONDITION_P_H |
5 | |
6 | // |
7 | // W A R N I N G |
8 | // ------------- |
9 | // |
10 | // This file is not part of the Qt API. It exists for the convenience of |
11 | // qmutex.cpp and qmutex_unix.cpp. This header file may change from version to |
12 | // version without notice, or even be removed. |
13 | // |
14 | // We mean it. |
15 | // |
16 | |
17 | #include <QtCore/QWaitCondition> |
18 | #include <QtCore/QMutex> |
19 | #include <QtCore/QDeadlineTimer> |
20 | #include <QtCore/private/qglobal_p.h> |
21 | |
22 | #include <condition_variable> |
23 | #include <mutex> |
24 | |
25 | QT_BEGIN_NAMESPACE |
26 | |
27 | namespace QtPrivate { |
28 | // Ideal alignment for mutex and condition_variable: it's the hardware |
29 | // interference size (size of a cache line) if the types are likely to contain |
30 | // the actual data structures, otherwise just that of a pointer. |
31 | inline constexpr quintptr IdealMutexAlignment = |
32 | sizeof(std::mutex) > sizeof(void *) && |
33 | sizeof(std::condition_variable) > sizeof(void *) ? |
34 | 64 : alignof(void*); |
35 | |
36 | } // namespace QtPrivate |
37 | |
38 | QT_END_NAMESPACE |
39 | |
40 | #endif /* QWAITCONDITION_P_H */ |
41 |
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