/**************************************************************************** ** ** 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" #if !defined(V4_BOOTSTRAP) #include "qv4object_p.h" #include "qv4internalclass_p.h" #endif QT_BEGIN_NAMESPACE namespace QV4 { struct 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; int offset; } objectLookup; struct { quintptr protoId; quintptr _unused; const Value *data; } protoLookup; struct { Heap::InternalClass *ic; Heap::InternalClass *ic2; int offset; int 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; int offset; } insertionLookup; struct { quintptr _unused; quintptr _unused2; uint index; } indexedLookup; struct { Heap::InternalClass *ic; Heap::QObjectWrapper *staticQObject; QQmlPropertyCache *propertyCache; QQmlPropertyData *propertyData; } qobjectLookup; struct { Heap::InternalClass *ic; quintptr unused; QQmlPropertyCache *propertyCache; QQmlPropertyData *propertyData; } 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; }; 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 setter0(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(markDef.h1) & 1)) markDef.h1->mark(stack); if (markDef.h2 && !(reinterpret_cast(markDef.h2) & 1)) markDef.h2->mark(stack); } void clear() { memset(&markDef, 0, sizeof(markDef)); } }; Q_STATIC_ASSERT(std::is_standard_layout::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