| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
|---|
| 3 | |
|---|
| 4 | #ifndef QANIMATIONJOBUTIL_P_H |
|---|
| 5 | #define QANIMATIONJOBUTIL_P_H |
|---|
| 6 | |
|---|
| 7 | // |
|---|
| 8 | // W A R N I N G |
|---|
| 9 | // ------------- |
|---|
| 10 | // |
|---|
| 11 | // This file is not part of the Qt API. It exists purely as an |
|---|
| 12 | // implementation detail. This header file may change from version to |
|---|
| 13 | // version without notice, or even be removed. |
|---|
| 14 | // |
|---|
| 15 | // We mean it. |
|---|
| 16 | // |
|---|
| 17 | |
|---|
| 18 | #include <QtCore/qcompilerdetection.h> |
|---|
| 19 | #include <QtCore/qtconfigmacros.h> |
|---|
| 20 | |
|---|
| 21 | #include <type_traits> |
|---|
| 22 | |
|---|
| 23 | QT_REQUIRE_CONFIG(qml_animation); |
|---|
| 24 | |
|---|
| 25 | QT_BEGIN_NAMESPACE |
|---|
| 26 | |
|---|
| 27 | #if defined(Q_CC_GNU_ONLY) && Q_CC_GNU_ONLY >= 1300 |
|---|
| 28 | # define ACTION_IF_DISABLE_DANGLING_POINTER_WARNING QT_WARNING_DISABLE_GCC("-Wdangling-pointer") |
|---|
| 29 | #else |
|---|
| 30 | # define ACTION_IF_DISABLE_DANGLING_POINTER_WARNING |
|---|
| 31 | #endif |
|---|
| 32 | |
|---|
| 33 | // SelfDeletable is used for self-destruction detection along with |
|---|
| 34 | // ACTION_IF_DELETED and RETURN_IF_DELETED macros. While using, the objects |
|---|
| 35 | // under test should have a member m_selfDeletable of type SelfDeletable |
|---|
| 36 | struct SelfDeletable { |
|---|
| 37 | ~SelfDeletable() { |
|---|
| 38 | if (m_wasDeleted) |
|---|
| 39 | *m_wasDeleted = true; |
|---|
| 40 | } |
|---|
| 41 | bool *m_wasDeleted = nullptr; |
|---|
| 42 | }; |
|---|
| 43 | |
|---|
| 44 | // \param p pointer to object under test, which should have a member m_selfDeletable of type SelfDeletable |
|---|
| 45 | // \param func statements or functions that to be executed under test. |
|---|
| 46 | // \param action post process if p was deleted under test. |
|---|
| 47 | #define ACTION_IF_DELETED(p, func, action) \ |
|---|
| 48 | do { \ |
|---|
| 49 | QT_WARNING_PUSH \ |
|---|
| 50 | ACTION_IF_DISABLE_DANGLING_POINTER_WARNING \ |
|---|
| 51 | static_assert(std::is_same<decltype((p)->m_selfDeletable), SelfDeletable>::value, "m_selfDeletable must be SelfDeletable");\ |
|---|
| 52 | bool *prevWasDeleted = (p)->m_selfDeletable.m_wasDeleted; \ |
|---|
| 53 | bool wasDeleted = false; \ |
|---|
| 54 | (p)->m_selfDeletable.m_wasDeleted = &wasDeleted; \ |
|---|
| 55 | {func;} \ |
|---|
| 56 | if (wasDeleted) { \ |
|---|
| 57 | if (prevWasDeleted) \ |
|---|
| 58 | *prevWasDeleted = true; \ |
|---|
| 59 | {action;} \ |
|---|
| 60 | } \ |
|---|
| 61 | (p)->m_selfDeletable.m_wasDeleted = prevWasDeleted; \ |
|---|
| 62 | QT_WARNING_POP \ |
|---|
| 63 | } while (false) |
|---|
| 64 | |
|---|
| 65 | #define RETURN_IF_DELETED(func) \ |
|---|
| 66 | ACTION_IF_DELETED(this, func, return) |
|---|
| 67 | |
|---|
| 68 | QT_END_NAMESPACE |
|---|
| 69 | |
|---|
| 70 | #endif // QANIMATIONJOBUTIL_P_H |
|---|
| 71 | |
|---|
