/**************************************************************************** ** ** 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 Lookup; struct OwnPropertyKeyIterator { virtual ~OwnPropertyKeyIterator() = 0; virtual PropertyKey next(const Object *o, Property *p = nullptr, PropertyAttributes *attrs = nullptr) = 0; }; struct VTable { typedef void (*Destroy)(Heap::Base *); typedef void (*MarkObjects)(Heap::Base *, MarkStack *markStack); typedef bool (*IsEqualTo)(Managed *m, Managed *other); typedef ReturnedValue (*Get)(const Managed *, PropertyKey id, const Value *receiver, bool *hasProperty); typedef bool (*Put)(Managed *, PropertyKey id, const Value &value, Value *receiver); typedef bool (*DeleteProperty)(Managed *m, PropertyKey id); typedef bool (*HasProperty)(const Managed *m, PropertyKey id); typedef PropertyAttributes (*GetOwnProperty)(const Managed *m, PropertyKey id, Property *p); typedef bool (*DefineOwnProperty)(Managed *m, PropertyKey id, const Property *p, PropertyAttributes attrs); typedef bool (*IsExtensible)(const Managed *); typedef bool (*PreventExtensions)(Managed *); typedef Heap::Object *(*GetPrototypeOf)(const Managed *); typedef bool (*SetPrototypeOf)(Managed *, const Object *); typedef qint64 (*GetLength)(const Managed *m); typedef OwnPropertyKeyIterator *(*OwnPropertyKeys)(const Object *m, Value *target); typedef ReturnedValue (*InstanceOf)(const Object *typeObject, const Value &var); typedef ReturnedValue (*Call)(const FunctionObject *, const Value *thisObject, const Value *argv, int argc); typedef ReturnedValue (*CallAsConstructor)(const FunctionObject *, const Value *argv, int argc, const Value *newTarget); typedef ReturnedValue (*ResolveLookupGetter)(const Object *, ExecutionEngine *, Lookup *); typedef bool (*ResolveLookupSetter)(Object *, ExecutionEngine *, Lookup *, const Value &); 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; MarkObjects markObjects; IsEqualTo isEqualTo; Get get; Put put; DeleteProperty deleteProperty; HasProperty hasProperty; GetOwnProperty getOwnProperty; DefineOwnProperty defineOwnProperty; IsExtensible isExtensible; PreventExtensions preventExtensions; GetPrototypeOf getPrototypeOf; SetPrototypeOf setPrototypeOf; GetLength getLength; OwnPropertyKeys ownPropertyKeys; InstanceOf instanceOf; Call call; CallAsConstructor callAsConstructor; ResolveLookupGetter resolveLookupGetter; ResolveLookupSetter resolveLookupSetter; }; struct VTableBase { protected: static constexpr VTable::Destroy virtualDestroy = nullptr; static constexpr VTable::IsEqualTo virtualIsEqualTo = nullptr; static constexpr VTable::Get virtualGet = nullptr; static constexpr VTable::Put virtualPut = nullptr; static constexpr VTable::DeleteProperty virtualDeleteProperty = nullptr; static constexpr VTable::HasProperty virtualHasProperty = nullptr; static constexpr VTable::GetOwnProperty virtualGetOwnProperty = nullptr; static constexpr VTable::DefineOwnProperty virtualDefineOwnProperty = nullptr; static constexpr VTable::IsExtensible virtualIsExtensible = nullptr; static constexpr VTable::PreventExtensions virtualPreventExtensions = nullptr; static constexpr VTable::GetPrototypeOf virtualGetPrototypeOf = nullptr; static constexpr VTable::SetPrototypeOf virtualSetPrototypeOf = nullptr; static constexpr VTable::GetLength virtualGetLength = nullptr; static constexpr VTable::OwnPropertyKeys virtualOwnPropertyKeys = nullptr; static constexpr VTable::InstanceOf virtualInstanceOf = nullptr; static constexpr VTable::Call virtualCall = nullptr; static constexpr VTable::CallAsConstructor virtualCallAsConstructor = nullptr; static constexpr VTable::ResolveLookupGetter virtualResolveLookupGetter = nullptr; static constexpr VTable::ResolveLookupSetter virtualResolveLookupSetter = nullptr; }; #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, \ \ classname::virtualDestroy, \ classname::Data::markObjects, \ classname::virtualIsEqualTo, \ \ classname::virtualGet, \ classname::virtualPut, \ classname::virtualDeleteProperty, \ classname::virtualHasProperty, \ classname::virtualGetOwnProperty, \ classname::virtualDefineOwnProperty, \ classname::virtualIsExtensible, \ classname::virtualPreventExtensions, \ classname::virtualGetPrototypeOf, \ classname::virtualSetPrototypeOf, \ classname::virtualGetLength, \ classname::virtualOwnPropertyKeys, \ classname::virtualInstanceOf, \ \ classname::virtualCall, \ classname::virtualCallAsConstructor, \ \ classname::virtualResolveLookupGetter, \ classname::virtualResolveLookupSetter \ } #define DEFINE_MANAGED_VTABLE(classname) \ const QV4::VTable classname::static_vtbl = DEFINE_MANAGED_VTABLE_INT(classname, 0) #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::VTable static_vtbl; \ static inline const QV4::VTable *staticVTable() { return &static_vtbl; } \ V4_MANAGED_SIZE_TEST \ QV4::Heap::DataClass *d_unchecked() const { return static_cast(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(); } #define DEFINE_OBJECT_VTABLE_BASE(classname) \ const QV4::VTable classname::static_vtbl = DEFINE_MANAGED_VTABLE_INT(classname, (std::is_same::value) ? nullptr : &classname::SuperClass::static_vtbl) #define DEFINE_OBJECT_VTABLE(classname) \ DEFINE_OBJECT_VTABLE_BASE(classname) #define DEFINE_OBJECT_TEMPLATE_VTABLE(classname) \ template<> DEFINE_OBJECT_VTABLE_BASE(classname) } QT_END_NAMESPACE #endif