Long live Qt 4.5!

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diff --git a/src/network/access/qnetworkaccesscache_p.h b/src/network/access/qnetworkaccesscache_p.h
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+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** Contact: Qt Software Information (qt-info@nokia.com)
+**
+** This file is part of the QtNetwork module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the either Technology Preview License Agreement or the
+** Beta Release License Agreement.
+**
+** 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, Nokia gives you certain
+** additional rights. These rights are described in the Nokia Qt LGPL
+** Exception version 1.0, 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.
+**
+** If you are unsure which license is appropriate for your use, please
+** contact the sales department at qt-sales@nokia.com.
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QNETWORKACCESSCACHE_P_H
+#define QNETWORKACCESSCACHE_P_H
+
+//
+//  W A R N I N G
+//  -------------
+//
+// This file is not part of the Qt API.  It exists for the convenience
+// of the Network Access API.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "QtCore/qobject.h"
+#include "QtCore/qbasictimer.h"
+#include "QtCore/qbytearray.h"
+#include "QtCore/qhash.h"
+#include "QtCore/qmetatype.h"
+
+QT_BEGIN_NAMESPACE
+
+class QNetworkRequest;
+class QUrl;
+
+class QNetworkAccessCache: public QObject
+{
+    Q_OBJECT
+public:
+    struct Node;
+    typedef QHash<QByteArray, Node> NodeHash;
+
+    class CacheableObject
+    {
+        friend class QNetworkAccessCache;
+        QByteArray key;
+        bool expires;
+        bool shareable;
+    public:
+        CacheableObject();
+        virtual ~CacheableObject();
+        virtual void dispose() = 0;
+        inline QByteArray cacheKey() const { return key; }
+
+    protected:
+        void setExpires(bool enable);
+        void setShareable(bool enable);
+    };
+
+    QNetworkAccessCache();
+    ~QNetworkAccessCache();
+
+    void clear();
+
+    void addEntry(const QByteArray &key, CacheableObject *entry);
+    bool hasEntry(const QByteArray &key) const;
+    bool requestEntry(const QByteArray &key, QObject *target, const char *member);
+    CacheableObject *requestEntryNow(const QByteArray &key);
+    void releaseEntry(const QByteArray &key);
+    void removeEntry(const QByteArray &key);
+
+signals:
+    void entryReady(QNetworkAccessCache::CacheableObject *);
+
+protected:
+    void timerEvent(QTimerEvent *);
+
+private:
+    // idea copied from qcache.h
+    NodeHash hash;
+    Node *oldest;
+    Node *newest;
+
+    QBasicTimer timer;
+
+    void linkEntry(const QByteArray &key);
+    bool unlinkEntry(const QByteArray &key);
+    void updateTimer();
+    bool emitEntryReady(Node *node, QObject *target, const char *member);
+};
+
+QT_END_NAMESPACE
+
+Q_DECLARE_METATYPE(QNetworkAccessCache::CacheableObject*)
+
+#endif