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-/****************************************************************************
-**
-** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
-** Contact: http://www.qt-project.org/
-**
-** This file is part of the QtDeclarative module of the Qt Toolkit.
-**
-** $QT_BEGIN_LICENSE:LGPL$
-** GNU Lesser General Public License Usage
-** 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, Nokia gives you certain additional
-** rights. These rights are described in the Nokia 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.
-**
-** Other Usage
-** Alternatively, this file may be used in accordance with the terms and
-** conditions contained in a signed written agreement between you and Nokia.
-**
-**
-**
-**
-**
-**
-** $QT_END_LICENSE$
-**
-****************************************************************************/
-
-#ifndef QDECLARATIVEPOOL_P_H
-#define QDECLARATIVEPOOL_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 <QtCore/qglobal.h>
-#include <QtCore/qstring.h>
-#include <QtCore/qurl.h>
-
-QT_BEGIN_NAMESPACE
-
-// Exported for QtQuick1
-class Q_DECLARATIVE_EXPORT QDeclarativePool
-{
-public:
- // The class has a destructor that needs to be called
- class Class {
- public:
- inline QDeclarativePool *pool() const;
-
- private:
- void *operator new(size_t);
- void *operator new(size_t, void *m) { return m; }
- friend class QDeclarativePool;
-
- QDeclarativePool *_pool;
- Class *_next;
- void (*_destroy)(Class *);
- };
-
- // The class is plain old data and no destructor needs to
- // be called
- class POD {
- public:
- inline QDeclarativePool *pool() const;
-
- private:
- void *operator new(size_t);
- void *operator new(size_t, void *m) { return m; }
- friend class QDeclarativePool;
-
- QDeclarativePool *_pool;
- };
-
- inline QDeclarativePool();
- inline ~QDeclarativePool();
-
- void clear();
-
- template<typename T>
- inline T *New();
- template<typename T>
- inline T *NewRaw();
- template<typename T>
- inline T *NewRawArray(int length);
-
- inline QString *NewString(const QString &);
- inline QByteArray *NewByteArray(const QByteArray &);
- inline QUrl *NewUrl(const QUrl &);
-
- template<typename T>
- struct List {
- List() : m_length(0), m_data(0) {}
- List(const List &o) : m_length(o.m_length), m_data(o.m_data) {}
- List &operator=(const List &o) {
- m_length = o.m_length;
- m_data = o.m_data;
- return *this;
- }
-
- int count() const {
- return m_length;
- }
- int length() const {
- return m_length;
- }
- const T &at(int index) const {
- Q_ASSERT(index < m_length);
- return m_data[index];
- };
- T &operator[](int index) {
- Q_ASSERT(index < m_length);
- return m_data[index];
- };
- private:
- friend class QDeclarativePool;
- List(T *d, int l) : m_length(l), m_data(d) {}
- int m_length;
- T *m_data;
- };
-
- template<typename T>
- inline List<T> NewRawList(int length);
-
-private:
- struct StringClass : public QString, public Class {
- };
- struct ByteArrayClass : public QByteArray, public Class {
- };
- struct UrlClass : public QUrl, public Class {
- };
-
- inline void *allocate(int size);
- void newpage();
-
- template<typename T>
- inline void initialize(POD *);
- template<typename T>
- inline void initialize(Class *);
- template<typename T>
- static void destroy(Class *c);
-
- struct Page {
- struct Header {
- Page *next;
- char *free;
- } header;
-
- static const int pageSize = 4 * 4096 - sizeof(Header);
-
- char memory[pageSize];
- };
-
- Page *_page;
- Class *_classList;
-};
-
-QDeclarativePool::QDeclarativePool()
-: _page(0), _classList(0)
-{
-}
-
-QDeclarativePool::~QDeclarativePool()
-{
- clear();
-}
-
-template<typename T>
-T *QDeclarativePool::New()
-{
- T *rv = new (allocate(sizeof(T))) T;
- initialize<T>(rv);
- rv->_pool = this;
- return rv;
-}
-
-template<typename T>
-T *QDeclarativePool::NewRaw()
-{
- return (T*)allocate(sizeof(T));
-}
-
-template<typename T>
-T *QDeclarativePool::NewRawArray(int length)
-{
- return (T*)allocate(length * sizeof(T));
-}
-
-template<typename T>
-QDeclarativePool::List<T> QDeclarativePool::NewRawList(int length)
-{
- return List<T>(NewRawArray<T>(length), length);
-}
-
-QString *QDeclarativePool::NewString(const QString &s)
-{
- QString *rv = New<StringClass>();
- *rv = s;
- return rv;
-}
-
-QByteArray *QDeclarativePool::NewByteArray(const QByteArray &s)
-{
- QByteArray *rv = New<ByteArrayClass>();
- *rv = s;
- return rv;
-}
-
-QUrl *QDeclarativePool::NewUrl(const QUrl &s)
-{
- QUrl *rv = New<UrlClass>();
- *rv = s;
- return rv;
-}
-
-void *QDeclarativePool::allocate(int size)
-{
- if (!_page || (_page->header.free + size) > (_page->memory + Page::pageSize))
- newpage();
-
- void *rv = _page->header.free;
- _page->header.free += size + ((8 - size) & 7); // ensure 8 byte alignment;
- return rv;
-}
-
-template<typename T>
-void QDeclarativePool::initialize(QDeclarativePool::POD *)
-{
-}
-
-template<typename T>
-void QDeclarativePool::initialize(QDeclarativePool::Class *c)
-{
- c->_next = _classList;
- c->_destroy = &destroy<T>;
- _classList = c;
-}
-
-template<typename T>
-void QDeclarativePool::destroy(Class *c)
-{
- static_cast<T *>(c)->~T();
-}
-
-QDeclarativePool *QDeclarativePool::Class::pool() const
-{
- return _pool;
-}
-
-QDeclarativePool *QDeclarativePool::POD::pool() const
-{
- return _pool;
-}
-
-QT_END_NAMESPACE
-
-#endif // QDECLARATIVEPOOL_P_H
-
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