diff options
| author | Erik Verbruggen <erik.verbruggen@digia.com> | 2016-09-09 15:37:57 +0200 |
|---|---|---|
| committer | Erik Verbruggen <erik.verbruggen@qt.io> | 2016-10-06 11:44:08 +0000 |
| commit | 3b14e2ffdd8eb4b7f7f4508768b75f2acc399370 (patch) | |
| tree | 7943f293bf2d0d376d5dc620448bab1a2b58027d /src/qml/qml/qqmlvaluetypewrapper_p.h | |
| parent | 1b90dc4482d001512f09a5785d4cbd8030879d82 (diff) | |
QML: Make Heap::Object and all subclasses trivial
GCC6 might dead-store-eliminate out our secret write to Base::mmdata,
because it expects all memory content to be "undefined" before
constructor calls. Clang might take the same approach if the constructor
of Heap::Object is removed.
By making these structs trivial, it also makes them memcpy-able.
Change-Id: I055b2ad28311b997fbe059849ebda4d5894eaa9b
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Diffstat (limited to 'src/qml/qml/qqmlvaluetypewrapper_p.h')
| -rw-r--r-- | src/qml/qml/qqmlvaluetypewrapper_p.h | 18 |
1 files changed, 14 insertions, 4 deletions
diff --git a/src/qml/qml/qqmlvaluetypewrapper_p.h b/src/qml/qml/qqmlvaluetypewrapper_p.h index 94eeba366a..b8ca5a16f4 100644 --- a/src/qml/qml/qqmlvaluetypewrapper_p.h +++ b/src/qml/qml/qqmlvaluetypewrapper_p.h @@ -66,14 +66,24 @@ namespace QV4 { namespace Heap { struct QQmlValueTypeWrapper : Object { - QQmlValueTypeWrapper() {} - ~QQmlValueTypeWrapper(); - QQmlRefPointer<QQmlPropertyCache> propertyCache; + void init() { Object::init(); } + void destroy(); + QQmlPropertyCache *propertyCache() const { return _propertyCache; } + void setPropertyCache(QQmlPropertyCache *c) { + if (c) + c->addref(); + if (_propertyCache) + _propertyCache->release(); + _propertyCache = c; + } mutable void *gadgetPtr; QQmlValueType *valueType; void setValue(const QVariant &value) const; QVariant toVariant() const; + +private: + QQmlPropertyCache *_propertyCache; }; } @@ -82,7 +92,7 @@ struct Q_QML_EXPORT QQmlValueTypeWrapper : Object { V4_OBJECT2(QQmlValueTypeWrapper, Object) V4_PROTOTYPE(valueTypeWrapperPrototype) - static void destroy(Heap::Base *b); + V4_NEEDS_DESTROY public: |