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39 | |
40 | #ifndef QANIMATIONJOBUTIL_P_H |
41 | #define QANIMATIONJOBUTIL_P_H |
42 | |
43 | // |
44 | // W A R N I N G |
45 | // ------------- |
46 | // |
47 | // This file is not part of the Qt API. It exists purely as an |
48 | // implementation detail. This header file may change from version to |
49 | // version without notice, or even be removed. |
50 | // |
51 | // We mean it. |
52 | // |
53 | |
54 | #include <type_traits> |
55 | |
56 | QT_REQUIRE_CONFIG(qml_animation); |
57 | |
58 | // SelfDeletable is used for self-destruction detection along with |
59 | // ACTION_IF_DELETED and RETURN_IF_DELETED macros. While using, the objects |
60 | // under test should have a member m_selfDeletable of type SelfDeletable |
61 | struct SelfDeletable { |
62 | ~SelfDeletable() { |
63 | if (m_wasDeleted) |
64 | *m_wasDeleted = true; |
65 | } |
66 | bool *m_wasDeleted = nullptr; |
67 | }; |
68 | |
69 | // \param p pointer to object under test, which should have a member m_selfDeletable of type SelfDeletable |
70 | // \param func statements or functions that to be executed under test. |
71 | // \param action post process if p was deleted under test. |
72 | #define ACTION_IF_DELETED(p, func, action) \ |
73 | do { \ |
74 | static_assert(std::is_same<decltype((p)->m_selfDeletable), SelfDeletable>::value, "m_selfDeletable must be SelfDeletable");\ |
75 | bool *prevWasDeleted = (p)->m_selfDeletable.m_wasDeleted; \ |
76 | bool wasDeleted = false; \ |
77 | (p)->m_selfDeletable.m_wasDeleted = &wasDeleted; \ |
78 | {func;} \ |
79 | if (wasDeleted) { \ |
80 | if (prevWasDeleted) \ |
81 | *prevWasDeleted = true; \ |
82 | {action;} \ |
83 | } \ |
84 | (p)->m_selfDeletable.m_wasDeleted = prevWasDeleted; \ |
85 | } while (false) |
86 | |
87 | #define RETURN_IF_DELETED(func) \ |
88 | ACTION_IF_DELETED(this, func, return) |
89 | |
90 | #endif // QANIMATIONJOBUTIL_P_H |
91 | |