From 5d5343a6bc02c0df3723cb9650067e972aebe8ff Mon Sep 17 00:00:00 2001
From: Lars Knoll <lars.knoll@theqtcompany.com>
Date: Thu, 23 Apr 2015 21:57:06 +0200
Subject: Save one more pointer on each binding

Fold the isAddedToObject flag into the nextBinding pointer.
Reorder the members to avoid holes in the data.

Change-Id: I0a216940f52020a5d48a6ed05cc236c248161b08
Reviewed-by: Simon Hausmann <simon.hausmann@theqtcompany.com>
---
 src/qml/qml/qqmlabstractbinding.cpp |  7 ++++---
 src/qml/qml/qqmlabstractbinding_p.h | 21 ++++++++++-----------
 src/qml/qml/qqmlbinding.cpp         |  2 +-
 3 files changed, 15 insertions(+), 15 deletions(-)

diff --git a/src/qml/qml/qqmlabstractbinding.cpp b/src/qml/qml/qqmlabstractbinding.cpp
index 0d281b7750..4e0763e95a 100644
--- a/src/qml/qml/qqmlabstractbinding.cpp
+++ b/src/qml/qml/qqmlabstractbinding.cpp
@@ -40,9 +40,7 @@
 QT_BEGIN_NAMESPACE
 
 QQmlAbstractBinding::QQmlAbstractBinding()
-    : m_nextBinding(0),
-      m_targetIndex(-1),
-      m_isAddedToObject(false)
+    : m_targetIndex(-1)
 {
     Q_ASSERT(!isAddedToObject());
 }
@@ -51,6 +49,9 @@ QQmlAbstractBinding::~QQmlAbstractBinding()
 {
     Q_ASSERT(!ref);
     Q_ASSERT(!isAddedToObject());
+
+    if (m_nextBinding.data() && !m_nextBinding->ref.deref())
+        delete m_nextBinding.data();
 }
 
 /*!
diff --git a/src/qml/qml/qqmlabstractbinding_p.h b/src/qml/qml/qqmlabstractbinding_p.h
index 79107bb04c..dd14301aa9 100644
--- a/src/qml/qml/qqmlabstractbinding_p.h
+++ b/src/qml/qml/qqmlabstractbinding_p.h
@@ -96,35 +96,30 @@ public:
     };
     RefCount ref;
 
-private:
+protected:
     friend class QQmlData;
     friend class QQmlValueTypeProxyBinding;
     friend class QQmlObjectCreator;
 
-    typedef QSharedPointer<QQmlAbstractBinding> SharedPointer;
-
     inline void setAddedToObject(bool v);
     inline bool isAddedToObject() const;
 
     inline void setNextBinding(QQmlAbstractBinding *);
 
-    // Pointer to the next binding in the linked list of bindings.
-    Ptr m_nextBinding;
-
-protected:
-    QFlagPointer<QObject> m_target;
     int m_targetIndex;
-    bool m_isAddedToObject;
+    QFlagPointer<QObject> m_target;
+    // Pointer to the next binding in the linked list of bindings.
+    QFlagPointer<QQmlAbstractBinding> m_nextBinding;
 };
 
 void QQmlAbstractBinding::setAddedToObject(bool v)
 {
-    m_isAddedToObject = v;
+    m_nextBinding.setFlagValue(v);
 }
 
 bool QQmlAbstractBinding::isAddedToObject() const
 {
-    return m_isAddedToObject;
+    return m_nextBinding.flag();
 }
 
 QQmlAbstractBinding *QQmlAbstractBinding::nextBinding() const
@@ -134,6 +129,10 @@ QQmlAbstractBinding *QQmlAbstractBinding::nextBinding() const
 
 void QQmlAbstractBinding::setNextBinding(QQmlAbstractBinding *b)
 {
+    if (b)
+        b->ref.ref();
+    if (m_nextBinding.data() && !m_nextBinding->ref.deref())
+        delete m_nextBinding.data();
     m_nextBinding = b;
 }
 
diff --git a/src/qml/qml/qqmlbinding.cpp b/src/qml/qml/qqmlbinding.cpp
index 72f35e17d6..7581aa6654 100644
--- a/src/qml/qml/qqmlbinding.cpp
+++ b/src/qml/qml/qqmlbinding.cpp
@@ -191,7 +191,7 @@ void QQmlBinding::update(QQmlPropertyPrivate::WriteFlags flags)
         QV4::ScopedValue result(scope, QQmlJavaScriptExpression::evaluate(&isUndefined));
 
         bool error = false;
-        if (!watcher.wasDeleted() && m_isAddedToObject && !hasError())
+        if (!watcher.wasDeleted() && isAddedToObject() && !hasError())
             error = !write(pd, result, isUndefined, flags);
 
         if (!watcher.wasDeleted()) {
-- 
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