| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
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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 |
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| 3 | |
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| 4 | #ifndef QANIMATIONJOBUTIL_P_H |
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| 5 | #define QANIMATIONJOBUTIL_P_H |
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| 6 | |
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| 7 | // |
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| 8 | // W A R N I N G |
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| 9 | // ------------- |
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| 10 | // |
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| 11 | // This file is not part of the Qt API. It exists purely as an |
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| 12 | // implementation detail. This header file may change from version to |
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| 13 | // version without notice, or even be removed. |
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| 14 | // |
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| 15 | // We mean it. |
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| 16 | // |
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| 17 | |
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| 18 | #include <QtCore/qcompilerdetection.h> |
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| 19 | #include <QtCore/qtconfigmacros.h> |
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| 20 | |
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| 21 | #include <type_traits> |
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| 22 | |
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| 23 | QT_REQUIRE_CONFIG(qml_animation); |
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| 24 | |
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| 25 | #if defined(Q_CC_GNU_ONLY) && Q_CC_GNU_ONLY >= 1300 |
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| 26 | # define ACTION_IF_DISABLE_DANGLING_POINTER_WARNING QT_WARNING_DISABLE_GCC("-Wdangling-pointer") |
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| 27 | #else |
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| 28 | # define ACTION_IF_DISABLE_DANGLING_POINTER_WARNING |
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| 29 | #endif |
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| 30 | |
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| 31 | // SelfDeletable is used for self-destruction detection along with |
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| 32 | // ACTION_IF_DELETED and RETURN_IF_DELETED macros. While using, the objects |
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| 33 | // under test should have a member m_selfDeletable of type SelfDeletable |
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| 34 | struct SelfDeletable { |
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| 35 | ~SelfDeletable() { |
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| 36 | if (m_wasDeleted) |
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| 37 | *m_wasDeleted = true; |
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| 38 | } |
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| 39 | bool *m_wasDeleted = nullptr; |
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| 40 | }; |
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| 41 | |
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| 42 | // \param p pointer to object under test, which should have a member m_selfDeletable of type SelfDeletable |
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| 43 | // \param func statements or functions that to be executed under test. |
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| 44 | // \param action post process if p was deleted under test. |
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| 45 | #define ACTION_IF_DELETED(p, func, action) \ |
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| 46 | do { \ |
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| 47 | QT_WARNING_PUSH \ |
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| 48 | ACTION_IF_DISABLE_DANGLING_POINTER_WARNING \ |
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| 49 | static_assert(std::is_same<decltype((p)->m_selfDeletable), SelfDeletable>::value, "m_selfDeletable must be SelfDeletable");\ |
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| 50 | bool *prevWasDeleted = (p)->m_selfDeletable.m_wasDeleted; \ |
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| 51 | bool wasDeleted = false; \ |
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| 52 | (p)->m_selfDeletable.m_wasDeleted = &wasDeleted; \ |
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| 53 | {func;} \ |
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| 54 | if (wasDeleted) { \ |
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| 55 | if (prevWasDeleted) \ |
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| 56 | *prevWasDeleted = true; \ |
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| 57 | {action;} \ |
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| 58 | } \ |
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| 59 | (p)->m_selfDeletable.m_wasDeleted = prevWasDeleted; \ |
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| 60 | QT_WARNING_POP \ |
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| 61 | } while (false) |
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| 62 | |
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| 63 | #define RETURN_IF_DELETED(func) \ |
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| 64 | ACTION_IF_DELETED(this, func, return) |
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| 65 | |
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| 66 | #endif // QANIMATIONJOBUTIL_P_H |
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| 67 | |
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