Move the Vtable for Managed objects into it's own file

Move both the code from qv4object and qv4managed into
a new qv4vtable_p.h file.

Change-Id: Ib1d58120b6c3b9b779b2692526c7e40a5265c4db
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>

1 files changed, 212 insertions, 0 deletions

diff --git a/src/qml/jsruntime/qv4vtable_p.h b/src/qml/jsruntime/qv4vtable_p.h
new file mode 100644
index 0000000000..df33dc773c
--- /dev/null
+++ b/src/qml/jsruntime/qv4vtable_p.h
@@ -0,0 +1,212 @@
+/****************************************************************************
+**
+** Copyright (C) 2018 The Qt Company Ltd.
+** Contact: https://www.qt.io/licensing/
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and The Qt Company. For licensing terms
+** and conditions see https://www.qt.io/terms-conditions. For further
+** information use the contact form at https://www.qt.io/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 3 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL3 included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 3 requirements
+** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 2.0 or (at your option) the GNU General
+** Public license version 3 or any later version approved by the KDE Free
+** Qt Foundation. The licenses are as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
+** included in the packaging of this file. Please review the following
+** information to ensure the GNU General Public License requirements will
+** be met: https://www.gnu.org/licenses/gpl-2.0.html and
+** https://www.gnu.org/licenses/gpl-3.0.html.
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+#ifndef QV4VTABLE_P_H
+#define QV4VTABLE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists purely as an
+// implementation detail.  This header file may change from version to
+// version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "qv4global_p.h"
+
+QT_BEGIN_NAMESPACE
+
+namespace QV4 {
+
+struct VTable
+{
+    typedef void (*Destroy)(Heap::Base *);
+
+    const VTable * const parent;
+    quint32 inlinePropertyOffset : 16;
+    quint32 nInlineProperties : 16;
+    quint8 isExecutionContext;
+    quint8 isString;
+    quint8 isObject;
+    quint8 isFunctionObject;
+    quint8 isErrorObject;
+    quint8 isArrayData;
+    quint8 isStringOrSymbol;
+    quint8 type;
+    quint8 unused[4];
+    const char *className;
+    Destroy destroy;
+    void (*markObjects)(Heap::Base *, MarkStack *markStack);
+    bool (*isEqualTo)(Managed *m, Managed *other);
+};
+
+#define Q_VTABLE_FUNCTION(classname, func) \
+    (classname::func == QV4::Managed::func ? 0 : classname::func)
+
+// Q_VTABLE_FUNCTION triggers a bogus tautological-compare warning in GCC6+
+#if (defined(Q_CC_GNU) && Q_CC_GNU >= 600)
+#define QT_WARNING_SUPPRESS_GCC_TAUTOLOGICAL_COMPARE_ON \
+    QT_WARNING_PUSH; \
+    QT_WARNING_DISABLE_GCC("-Wtautological-compare")
+
+#define QT_WARNING_SUPPRESS_GCC_TAUTOLOGICAL_COMPARE_OFF \
+    ;QT_WARNING_POP
+#elif defined(Q_CC_CLANG) && Q_CC_CLANG >= 306
+#define QT_WARNING_SUPPRESS_GCC_TAUTOLOGICAL_COMPARE_ON \
+    QT_WARNING_PUSH; \
+    QT_WARNING_DISABLE_CLANG("-Wtautological-compare")
+
+#define QT_WARNING_SUPPRESS_GCC_TAUTOLOGICAL_COMPARE_OFF \
+    ;QT_WARNING_POP
+#else
+#define QT_WARNING_SUPPRESS_GCC_TAUTOLOGICAL_COMPARE_ON
+#define QT_WARNING_SUPPRESS_GCC_TAUTOLOGICAL_COMPARE_OFF
+#endif
+
+#define DEFINE_MANAGED_VTABLE_INT(classname, parentVTable) \
+{     \
+    parentVTable, \
+    (sizeof(classname::Data) + sizeof(QV4::Value) - 1)/sizeof(QV4::Value), \
+    (sizeof(classname::Data) + (classname::NInlineProperties*sizeof(QV4::Value)) + QV4::Chunk::SlotSize - 1)/QV4::Chunk::SlotSize*QV4::Chunk::SlotSize/sizeof(QV4::Value) \
+        - (sizeof(classname::Data) + sizeof(QV4::Value) - 1)/sizeof(QV4::Value), \
+    classname::IsExecutionContext,   \
+    classname::IsString,   \
+    classname::IsObject,   \
+    classname::IsFunctionObject,   \
+    classname::IsErrorObject,   \
+    classname::IsArrayData,   \
+    classname::IsStringOrSymbol,   \
+    classname::MyType,                          \
+    { 0, 0, 0, 0 },                                          \
+    #classname, \
+    Q_VTABLE_FUNCTION(classname, destroy),                                    \
+    classname::Data::markObjects,                                    \
+    isEqualTo                                  \
+} \
+
+#define DEFINE_MANAGED_VTABLE(classname) \
+QT_WARNING_SUPPRESS_GCC_TAUTOLOGICAL_COMPARE_ON \
+const QV4::VTable classname::static_vtbl = DEFINE_MANAGED_VTABLE_INT(classname, 0) \
+QT_WARNING_SUPPRESS_GCC_TAUTOLOGICAL_COMPARE_OFF
+
+#define V4_OBJECT2(DataClass, superClass) \
+    private: \
+        DataClass() Q_DECL_EQ_DELETE; \
+        Q_DISABLE_COPY(DataClass) \
+    public: \
+        Q_MANAGED_CHECK \
+        typedef QV4::Heap::DataClass Data; \
+        typedef superClass SuperClass; \
+        static const QV4::ObjectVTable static_vtbl; \
+        static inline const QV4::VTable *staticVTable() { return &static_vtbl.vTable; } \
+        V4_MANAGED_SIZE_TEST \
+        QV4::Heap::DataClass *d_unchecked() const { return static_cast<QV4::Heap::DataClass *>(m()); } \
+        QV4::Heap::DataClass *d() const { \
+            QV4::Heap::DataClass *dptr = d_unchecked(); \
+            dptr->_checkIsInitialized(); \
+            return dptr; \
+        } \
+        Q_STATIC_ASSERT(std::is_trivial< QV4::Heap::DataClass >::value);
+
+#define V4_PROTOTYPE(p) \
+    static QV4::Object *defaultPrototype(QV4::ExecutionEngine *e) \
+    { return e->p(); }
+
+typedef ReturnedValue (*jsCallFunction)(const FunctionObject *, const Value *thisObject, const Value *argv, int argc);
+typedef ReturnedValue (*jsConstructFunction)(const FunctionObject *, const Value *argv, int argc);
+
+struct ObjectVTable
+{
+    VTable vTable;
+    jsCallFunction call;
+    jsConstructFunction callAsConstructor;
+    ReturnedValue (*get)(const Managed *, PropertyKey id, const Value *receiver, bool *hasProperty);
+    bool (*put)(Managed *, PropertyKey id, const Value &value, Value *receiver);
+    bool (*deleteProperty)(Managed *m, PropertyKey id);
+    bool (*hasProperty)(const Managed *m, PropertyKey id);
+    PropertyAttributes (*getOwnProperty)(Managed *m, PropertyKey id, Property *p);
+    bool (*defineOwnProperty)(Managed *m, PropertyKey id, const Property *p, PropertyAttributes attrs);
+    bool (*isExtensible)(const Managed *);
+    bool (*preventExtensions)(Managed *);
+    Heap::Object *(*getPrototypeOf)(const Managed *);
+    bool (*setPrototypeOf)(Managed *, const Object *);
+    qint64 (*getLength)(const Managed *m);
+    void (*advanceIterator)(Managed *m, ObjectIterator *it, Value *name, uint *index, Property *p, PropertyAttributes *attributes);
+    ReturnedValue (*instanceOf)(const Object *typeObject, const Value &var);
+};
+
+#define DEFINE_OBJECT_VTABLE_BASE(classname) \
+const QV4::ObjectVTable classname::static_vtbl =    \
+{     \
+    DEFINE_MANAGED_VTABLE_INT(classname, (std::is_same<classname::SuperClass, Object>::value) ? nullptr : &classname::SuperClass::static_vtbl.vTable), \
+    call,                                       \
+    callAsConstructor,                          \
+    get,                                        \
+    put,                                        \
+    deleteProperty,                             \
+    hasProperty,                                \
+    getOwnProperty,                             \
+    defineOwnProperty,                          \
+    isExtensible,                               \
+    preventExtensions,                          \
+    getPrototypeOf,                             \
+    setPrototypeOf,                             \
+    getLength,                                  \
+    advanceIterator,                            \
+    instanceOf                                  \
+}
+
+#define DEFINE_OBJECT_VTABLE(classname) \
+QT_WARNING_SUPPRESS_GCC_TAUTOLOGICAL_COMPARE_ON \
+DEFINE_OBJECT_VTABLE_BASE(classname) \
+QT_WARNING_SUPPRESS_GCC_TAUTOLOGICAL_COMPARE_OFF
+
+#define DEFINE_OBJECT_TEMPLATE_VTABLE(classname) \
+QT_WARNING_SUPPRESS_GCC_TAUTOLOGICAL_COMPARE_ON \
+template<> DEFINE_OBJECT_VTABLE_BASE(classname) \
+QT_WARNING_SUPPRESS_GCC_TAUTOLOGICAL_COMPARE_OFF
+
+
+}
+
+QT_END_NAMESPACE
+
+#endif