Store int/bool/double/string and sizef as QV4::Value in a Javascript array

This is the first patch in a series of patches removing the QQmlVMEVariant
used for the storage of non-var properties. The overall goal is to reduce the
memory usage of QML. The QQmlVMEVariant has a size of 8*sizeof(void*) +
sizeof(int) which is quite an overhead for types such as int/bool or double.

Change-Id: I301661d134724300942911a3d75258fe45356a7a
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>

1 files changed, 20 insertions, 0 deletions

diff --git a/src/qml/qml/qqmlvmemetaobject_p.h b/src/qml/qml/qqmlvmemetaobject_p.h
index a320163f23..a87feec043 100644
--- a/src/qml/qml/qqmlvmemetaobject_p.h
+++ b/src/qml/qml/qqmlvmemetaobject_p.h
@@ -204,6 +204,26 @@ public:
     inline void allocateVarPropertiesArray();
     inline bool ensureVarPropertiesAllocated();
 
+    // temporary solution so I can experiment with storing
+    // properties in a JS array. Should be switched over to also
+    // use the 'varProperties' in the end.
+    QV4::WeakValue properties;
+    bool propertiesInitialized;
+    inline void allocatePropertiesArray();
+    inline bool ensurePropertiesAllocated();
+
+    int readPropertyAsInt(int id);
+    bool readPropertyAsBool(int id);
+    double readPropertyAsDouble(int id);
+    QString readPropertyAsString(int id);
+    QSizeF readPropertyAsSizeF(int id);
+
+    void writeProperty(int id, int v);
+    void writeProperty(int id, bool v);
+    void writeProperty(int id, double v);
+    void writeProperty(int id, const QString& v);
+    void writeProperty(int id, const QSizeF& v);
+
     void ensureQObjectWrapper();
 
     void mark(QV4::ExecutionEngine *e);