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Diffstat (limited to 'src/qml/jsruntime/qv4vtable_p.h')
-rw-r--r-- | src/qml/jsruntime/qv4vtable_p.h | 212 |
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 |