From 6778b247a8c20adfb3f4e3094077baae43f3e65c Mon Sep 17 00:00:00 2001 From: Lars Knoll Date: Tue, 25 Aug 2020 12:27:09 +0200 Subject: Add a QBindingStorage class QBindingStorage is a class that can store a set of binding objects for the properties of a QObject. This will get used to reduce the memory overhead of the property system when adding bindable properties to QObject based classes. The binding storage has a pointer to the TLS entry containing the currently evaluating binding. Like that we avoid repeated TLS lookups and reduce the overhead of the property system to one pointer lookup and one compare for the case that properties aren't being used. Each QObject now owns one binding storage object, that can be used to store binding data for properties that members of the QObject. Change-Id: I27427c03c2ba281f072e074be96147bdbcaac246 Reviewed-by: Fabian Kosmale --- src/corelib/kernel/qproperty.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'src/corelib/kernel/qproperty.h') diff --git a/src/corelib/kernel/qproperty.h b/src/corelib/kernel/qproperty.h index 85bdfdcd56..bb89dbf94f 100644 --- a/src/corelib/kernel/qproperty.h +++ b/src/corelib/kernel/qproperty.h @@ -721,6 +721,27 @@ public: } }; +struct QBindingStatus; + +struct QBindingStorageData; +class Q_CORE_EXPORT QBindingStorage +{ + mutable QBindingStorageData *d = nullptr; + QBindingStatus *bindingStatus = nullptr; + + template + friend class QObjectCompatProperty; +public: + QBindingStorage(); + ~QBindingStorage(); + + bool isEmpty() { return !d; } + + void maybeUpdateBindingAndRegister(const QUntypedPropertyData *data) const; + QtPrivate::QPropertyBindingData *bindingData(const QUntypedPropertyData *data) const; + QtPrivate::QPropertyBindingData *bindingData(QUntypedPropertyData *data, bool create); +}; + QT_END_NAMESPACE #endif // QPROPERTY_H -- cgit v1.2.3