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Diffstat (limited to 'src/qml/jsruntime/qv4internalclass_p.h')
-rw-r--r-- | src/qml/jsruntime/qv4internalclass_p.h | 154 |
1 files changed, 154 insertions, 0 deletions
diff --git a/src/qml/jsruntime/qv4internalclass_p.h b/src/qml/jsruntime/qv4internalclass_p.h new file mode 100644 index 0000000000..fc6c5352b1 --- /dev/null +++ b/src/qml/jsruntime/qv4internalclass_p.h @@ -0,0 +1,154 @@ +/**************************************************************************** +** +** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** 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 Digia. For licensing terms and +** conditions see http://qt.digia.com/licensing. For further information +** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Digia gives you certain additional +** rights. These rights are described in the Digia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** GNU General Public License Usage +** Alternatively, this file may be used under the terms of the GNU +** General Public License version 3.0 as published by the Free Software +** Foundation and appearing in the file LICENSE.GPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU General Public License version 3.0 requirements will be +** met: http://www.gnu.org/copyleft/gpl.html. +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ +#ifndef QV4INTERNALCLASS_H +#define QV4INTERNALCLASS_H + +#include <QHash> +#include <QVector> +#include "qv4global_p.h" + +QT_BEGIN_NAMESPACE + +namespace QV4 { + +struct String; +struct ExecutionEngine; +struct Object; +struct Identifier; + +struct PropertyHashData; +struct PropertyHash +{ + struct Entry { + const Identifier *identifier; + uint index; + }; + + PropertyHashData *d; + + inline PropertyHash(); + inline PropertyHash(const PropertyHash &other); + inline ~PropertyHash(); + + void addEntry(const Entry &entry, int classSize); + uint lookup(const Identifier *identifier) const; + +private: + PropertyHash &operator=(const PropertyHash &other); +}; + +struct PropertyHashData +{ + PropertyHashData(int numBits); + ~PropertyHashData() { + free(entries); + } + + QBasicAtomicInt refCount; + int alloc; + int size; + int numBits; + PropertyHash::Entry *entries; +}; + +inline PropertyHash::PropertyHash() +{ + d = new PropertyHashData(3); +} + +inline PropertyHash::PropertyHash(const PropertyHash &other) +{ + d = other.d; + d->refCount.ref(); +} + +inline PropertyHash::~PropertyHash() +{ + if (!d->refCount.deref()) + delete d; +} + +struct InternalClassTransition +{ + Identifier *id; + int flags; + + bool operator==(const InternalClassTransition &other) const + { return id == other.id && flags == other.flags; } +}; +uint qHash(const QV4::InternalClassTransition &t, uint = 0); + +struct InternalClass { + ExecutionEngine *engine; + PropertyHash propertyTable; // id to valueIndex + QVector<String *> nameMap; + + QVector<PropertyAttributes> propertyData; + + typedef InternalClassTransition Transition; + QHash<Transition, InternalClass *> transitions; // id to next class, positive means add, negative delete + + InternalClass *m_sealed; + InternalClass *m_frozen; + + uint size; + + InternalClass *addMember(String *string, PropertyAttributes data, uint *index = 0); + InternalClass *changeMember(String *string, PropertyAttributes data, uint *index = 0); + void removeMember(Object *object, Identifier *id); + uint find(String *s); + + InternalClass *sealed(); + InternalClass *frozen(); + + void destroy(); + +private: + friend struct ExecutionEngine; + InternalClass(ExecutionEngine *engine) : engine(engine), m_sealed(0), m_frozen(0), size(0) {} + InternalClass(const InternalClass &other); +}; + +} + +QT_END_NAMESPACE + +#endif |