diff options
Diffstat (limited to 'src/network/access/qnetworkaccesscache_p.h')
| -rw-r--r-- | src/network/access/qnetworkaccesscache_p.h | 127 |
1 files changed, 127 insertions, 0 deletions
diff --git a/src/network/access/qnetworkaccesscache_p.h b/src/network/access/qnetworkaccesscache_p.h new file mode 100644 index 0000000..23d8828 --- /dev/null +++ b/src/network/access/qnetworkaccesscache_p.h @@ -0,0 +1,127 @@ +/**************************************************************************** +** +** 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 |