--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/util/src/network/kernel/qhostinfo_p.h	Wed Mar 31 11:06:36 2010 +0300
@@ -0,0 +1,196 @@
+/****************************************************************************
+**
+** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (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 Technology Preview License Agreement accompanying
+** this package.
+**
+** 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 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QHOSTINFO_P_H
+#define QHOSTINFO_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 QHostInfo class.  This header file may change from
+// version to version without notice, or even be removed.
+//
+// We mean it.
+//
+
+#include "QtCore/qcoreapplication.h"
+#include "private/qcoreapplication_p.h"
+#include "QtNetwork/qhostinfo.h"
+#include "QtCore/qmutex.h"
+#include "QtCore/qwaitcondition.h"
+#include "QtCore/qobject.h"
+#include "QtCore/qpointer.h"
+
+#ifndef QT_NO_THREAD
+#include "QtCore/qthread.h"
+#include "QtCore/qthreadpool.h"
+#include "QtCore/qmutex.h"
+#include "QtCore/qrunnable.h"
+#include "QtCore/qlist.h"
+#include "QtCore/qqueue.h"
+#include <QTime>
+#include <QCache>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+class QHostInfoResult : public QObject
+{
+    Q_OBJECT
+public Q_SLOTS:
+    inline void emitResultsReady(const QHostInfo &info)
+    {
+        emit resultsReady(info);
+    }
+
+Q_SIGNALS:
+    void resultsReady(const QHostInfo info);
+};
+
+// needs to be QObject because fromName calls tr()
+class QHostInfoAgent : public QObject
+{
+    Q_OBJECT
+public:
+    static QHostInfo fromName(const QString &hostName);
+};
+
+class QHostInfoPrivate
+{
+public:
+    inline QHostInfoPrivate()
+        : err(QHostInfo::NoError),
+          errorStr(QLatin1String(QT_TRANSLATE_NOOP("QHostInfo", "Unknown error"))),
+          lookupId(0)
+    {
+    }
+
+    QHostInfo::HostInfoError err;
+    QString errorStr;
+    QList<QHostAddress> addrs;
+    QString hostName;
+    int lookupId;
+};
+
+#ifndef QT_NO_THREAD
+// These functions are outside of the QHostInfo class and strictly internal.
+// Do NOT use them outside of QAbstractSocket.
+QHostInfo Q_NETWORK_EXPORT qt_qhostinfo_lookup(const QString &name, QObject *receiver, const char *member, bool *valid, int *id);
+void Q_NETWORK_EXPORT qt_qhostinfo_clear_cache();
+void Q_AUTOTEST_EXPORT qt_qhostinfo_enable_cache(bool e);
+
+class QHostInfoCache
+{
+public:
+    QHostInfoCache();
+    const int max_age; // seconds
+
+    QHostInfo get(const QString &name, bool *valid);
+    void put(const QString &name, const QHostInfo &info);
+    void clear();
+
+    bool isEnabled();
+    void setEnabled(bool e);
+private:
+    bool enabled;
+    struct QHostInfoCacheElement {
+        QHostInfo info;
+        QTime age;
+    };
+    QCache<QString,QHostInfoCacheElement> cache;
+    QMutex mutex;
+};
+
+// the following classes are used for the (normal) case: We use multiple threads to lookup DNS
+
+class QHostInfoRunnable : public QRunnable
+{
+public:
+    QHostInfoRunnable (QString hn, int i);
+    void run();
+
+    QString toBeLookedUp;
+    int id;
+    QHostInfoResult resultEmitter;
+};
+
+class QHostInfoLookupManager : public QObject
+{
+    Q_OBJECT
+public:
+    QHostInfoLookupManager();
+    ~QHostInfoLookupManager();
+
+    void work();
+
+    // called from QHostInfo
+    void scheduleLookup(QHostInfoRunnable *r);
+    void abortLookup(int id);
+
+    // called from QHostInfoRunnable
+    void lookupFinished(QHostInfoRunnable *r);
+    bool wasAborted(int id);
+
+    QHostInfoCache cache;
+protected:
+    QList<QHostInfoRunnable*> currentLookups; // in progress
+    QList<QHostInfoRunnable*> postponedLookups; // postponed because in progress for same host
+    QQueue<QHostInfoRunnable*> scheduledLookups; // not yet started
+    QList<QHostInfoRunnable*> finishedLookups; // recently finished
+    QList<int> abortedLookups; // ids of aborted lookups
+
+    QThreadPool threadPool;
+
+    QMutex mutex;
+
+    bool wasDeleted;
+
+private slots:
+    void waitForThreadPoolDone() { threadPool.waitForDone(); }
+};
+
+#endif
+
+QT_END_NAMESPACE
+
+#endif // QHOSTINFO_P_H