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/****************************************************************************
**
** Copyright (C) 2016 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 QV4LOOKUP_H
#define QV4LOOKUP_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"
#include "qv4runtime_p.h"
#include "qv4engine_p.h"
#include "qv4context_p.h"
#include "qv4object_p.h"
#include "qv4internalclass_p.h"
QT_BEGIN_NAMESPACE
namespace QV4 {
struct Q_QML_PRIVATE_EXPORT Lookup {
union {
ReturnedValue (*getter)(Lookup *l, ExecutionEngine *engine, const Value &object);
ReturnedValue (*globalGetter)(Lookup *l, ExecutionEngine *engine);
ReturnedValue (*qmlContextPropertyGetter)(Lookup *l, ExecutionEngine *engine, Value *thisObject);
bool (*setter)(Lookup *l, ExecutionEngine *engine, Value &object, const Value &v);
};
// NOTE: gc assumes the first two entries in the struct are pointers to heap objects or null
union {
struct {
Heap::Base *h1;
Heap::Base *h2;
quintptr unused;
quintptr unused2;
} markDef;
struct {
Heap::InternalClass *ic;
quintptr unused;
uint index;
uint offset;
} objectLookup;
struct {
quintptr protoId;
quintptr _unused;
const Value *data;
} protoLookup;
struct {
Heap::InternalClass *ic;
Heap::InternalClass *ic2;
uint offset;
uint offset2;
} objectLookupTwoClasses;
struct {
quintptr protoId;
quintptr protoId2;
const Value *data;
const Value *data2;
} protoLookupTwoClasses;
struct {
// Make sure the next two values are in sync with protoLookup
quintptr protoId;
Heap::Object *proto;
const Value *data;
quintptr type;
} primitiveLookup;
struct {
Heap::InternalClass *newClass;
quintptr protoId;
uint offset;
uint unused;
} insertionLookup;
struct {
quintptr _unused;
quintptr _unused2;
uint index;
uint unused;
} indexedLookup;
struct {
Heap::InternalClass *ic;
Heap::InternalClass *qmlTypeIc; // only used when lookup goes through QQmlTypeWrapper
QQmlPropertyCache *propertyCache;
QQmlPropertyData *propertyData;
} qobjectLookup;
struct {
Heap::InternalClass *ic;
quintptr metaObject; // a (const QMetaObject* & 1) or nullptr
const QtPrivate::QMetaTypeInterface *metaType; // cannot use QMetaType; class must be trivial
quint16 coreIndex;
bool isFunction;
bool isEnum;
} qgadgetLookup;
struct {
quintptr unused1;
quintptr unused2;
int scriptIndex;
} qmlContextScriptLookup;
struct {
Heap::Object *singleton;
quintptr unused;
} qmlContextSingletonLookup;
struct {
quintptr unused1;
quintptr unused2;
int objectId;
} qmlContextIdObjectLookup;
struct {
// Same as protoLookup, as used for global lookups
quintptr reserved1;
quintptr reserved2;
quintptr reserved3;
ReturnedValue (*getterTrampoline)(Lookup *l, ExecutionEngine *engine);
} qmlContextGlobalLookup;
struct {
Heap::Object *qmlTypeWrapper;
quintptr unused2;
} qmlTypeLookup;
struct {
Heap::InternalClass *ic;
quintptr unused;
ReturnedValue encodedEnumValue;
} qmlEnumValueLookup;
struct {
Heap::InternalClass *ic;
Heap::Object *qmlScopedEnumWrapper;
} qmlScopedEnumWrapperLookup;
};
uint nameIndex;
ReturnedValue resolveGetter(ExecutionEngine *engine, const Object *object);
ReturnedValue resolvePrimitiveGetter(ExecutionEngine *engine, const Value &object);
ReturnedValue resolveGlobalGetter(ExecutionEngine *engine);
void resolveProtoGetter(PropertyKey name, const Heap::Object *proto);
static ReturnedValue getterGeneric(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue getterTwoClasses(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue getterFallback(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue getter0MemberData(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue getter0Inline(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue getterProto(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue getter0Inlinegetter0Inline(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue getter0Inlinegetter0MemberData(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue getter0MemberDatagetter0MemberData(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue getterProtoTwoClasses(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue getterAccessor(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue getterProtoAccessor(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue getterProtoAccessorTwoClasses(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue getterIndexed(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue primitiveGetterProto(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue primitiveGetterAccessor(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue stringLengthGetter(Lookup *l, ExecutionEngine *engine, const Value &object);
static ReturnedValue globalGetterGeneric(Lookup *l, ExecutionEngine *engine);
static ReturnedValue globalGetterProto(Lookup *l, ExecutionEngine *engine);
static ReturnedValue globalGetterProtoAccessor(Lookup *l, ExecutionEngine *engine);
bool resolveSetter(ExecutionEngine *engine, Object *object, const Value &value);
static bool setterGeneric(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value);
Q_NEVER_INLINE static bool setterTwoClasses(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value);
static bool setterFallback(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value);
static bool setter0MemberData(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value);
static bool setter0Inline(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value);
static bool setter0setter0(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value);
static bool setterInsert(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value);
static bool arrayLengthSetter(Lookup *l, ExecutionEngine *engine, Value &object, const Value &value);
void markObjects(MarkStack *stack) {
if (markDef.h1 && !(reinterpret_cast<quintptr>(markDef.h1) & 1))
markDef.h1->mark(stack);
if (markDef.h2 && !(reinterpret_cast<quintptr>(markDef.h2) & 1))
markDef.h2->mark(stack);
}
void clear() {
memset(&markDef, 0, sizeof(markDef));
}
};
Q_STATIC_ASSERT(std::is_standard_layout<Lookup>::value);
// Ensure that these offsets are always at this point to keep generated code compatible
// across 32-bit and 64-bit (matters when cross-compiling).
Q_STATIC_ASSERT(offsetof(Lookup, getter) == 0);
}
QT_END_NAMESPACE
#endif
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