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40 ****************************************************************************/
42 #include "qqmlcleanup_p.h"
44 #include "qqmlengine_p.h"
51 \brief The QQmlCleanup provides a callback when a QQmlEngine is deleted.
53 Any object that needs cleanup to occur before the QQmlEngine's V8 engine is
54 destroyed should inherit from QQmlCleanup. The clear() virtual method will be
55 called by QQmlEngine just before it destroys the context.
60 Create a QQmlCleanup that is not associated with any engine.
62 QQmlCleanup::QQmlCleanup()
63 : prev(0), next(0), engine(0)
68 Create a QQmlCleanup for \a engine
70 QQmlCleanup::QQmlCleanup(QQmlEngine *engine)
71 : prev(0), next(0), engine(0)
80 Adds this object to \a engine's cleanup list. hasEngine() must be false
81 before calling this method.
83 void QQmlCleanup::addToEngine(QQmlEngine *engine)
86 Q_ASSERT(QQmlEnginePrivate::isEngineThread(engine));
88 this->engine = engine;
90 QQmlEnginePrivate *p = QQmlEnginePrivate::get(engine);
92 if (p->cleanup) next = p->cleanup;
95 if (next) next->prev = &next;
99 \fn bool QQmlCleanup::hasEngine() const
101 Returns true if this QQmlCleanup is associated with an engine, otherwise false.
107 QQmlCleanup::~QQmlCleanup()
109 Q_ASSERT(!prev || engine);
110 Q_ASSERT(!prev || QQmlEnginePrivate::isEngineThread(engine));
112 if (prev) *prev = next;
113 if (next) next->prev = prev;