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authorQt by Nokia <qt-info@nokia.com>2011-04-27 12:05:43 +0200
committeraxis <qt-info@nokia.com>2011-04-27 12:05:43 +0200
commit38be0d13830efd2d98281c645c3a60afe05ffece (patch)
tree6ea73f3ec77f7d153333779883e8120f82820abe /src/network/kernel/qhostinfo_p.h
Initial import from the monolithic Qt.
This is the beginning of revision history for this module. If you want to look at revision history older than this, please refer to the Qt Git wiki for how to use Git history grafting. At the time of writing, this wiki is located here: http://qt.gitorious.org/qt/pages/GitIntroductionWithQt If you have already performed the grafting and you don't see any history beyond this commit, try running "git log" with the "--follow" argument. Branched from the monolithic repo, Qt master branch, at commit 896db169ea224deb96c59ce8af800d019de63f12
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+/****************************************************************************
+**
+** Copyright (C) 2011 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"
+#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 <QElapsedTimer>
+#include <QCache>
+
+#include <QNetworkSession>
+#include <QSharedPointer>
+
+#ifdef Q_OS_SYMBIAN
+// Symbian Headers
+#include <es_sock.h>
+#include <in_sock.h>
+#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);
+ static QHostInfo fromName(const QString &hostName, QSharedPointer<QNetworkSession> networkSession);
+
+#ifdef Q_OS_SYMBIAN
+ static int lookupHost(const QString &name, QObject *receiver, const char *member);
+ static void abortHostLookup(int lookupId);
+#endif
+};
+
+class QHostInfoPrivate
+{
+public:
+ inline QHostInfoPrivate()
+ : err(QHostInfo::NoError),
+ errorStr(QLatin1String(QT_TRANSLATE_NOOP("QHostInfo", "Unknown error"))),
+ lookupId(0)
+ {
+ }
+#ifndef QT_NO_BEARERMANAGEMENT
+ //not a public API yet
+ static QHostInfo fromName(const QString &hostName, QSharedPointer<QNetworkSession> networkSession);
+#endif
+
+ QHostInfo::HostInfoError err;
+ QString errorStr;
+ QList<QHostAddress> addrs;
+ QString hostName;
+ int lookupId;
+};
+
+// 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_AUTOTEST_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;
+ QElapsedTimer 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 QAbstractHostInfoLookupManager : public QObject
+{
+ Q_OBJECT
+
+public:
+ ~QAbstractHostInfoLookupManager() {}
+ virtual void clear() = 0;
+
+ QHostInfoCache cache;
+
+protected:
+ QAbstractHostInfoLookupManager() {}
+ static QAbstractHostInfoLookupManager* globalInstance();
+
+};
+
+#ifndef Q_OS_SYMBIAN
+class QHostInfoLookupManager : public QAbstractHostInfoLookupManager
+{
+ Q_OBJECT
+public:
+ QHostInfoLookupManager();
+ ~QHostInfoLookupManager();
+
+ void clear();
+ void work();
+
+ // called from QHostInfo
+ void scheduleLookup(QHostInfoRunnable *r);
+ void abortLookup(int id);
+
+ // called from QHostInfoRunnable
+ void lookupFinished(QHostInfoRunnable *r);
+ bool wasAborted(int id);
+
+ friend class QHostInfoRunnable;
+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(); }
+};
+
+#else
+
+class QSymbianHostResolver : public CActive
+{
+public:
+ QSymbianHostResolver(const QString &hostName, int id, QSharedPointer<QNetworkSession> networkSession);
+ ~QSymbianHostResolver();
+
+ void requestHostLookup();
+ void abortHostLookup();
+ int id();
+
+ void returnResults();
+
+ QHostInfoResult resultEmitter;
+
+private:
+ void DoCancel();
+ void RunL();
+ void run();
+ TInt RunError(TInt aError);
+
+ void processNameResult();
+ void nextNameResult();
+ void processAddressResult();
+
+private:
+ int iId;
+
+ const QString iHostName;
+ QString iEncodedHostName;
+ TPtrC iHostNamePtr;
+
+ RSocketServ& iSocketServ;
+ RHostResolver iHostResolver;
+ QSharedPointer<QNetworkSession> iNetworkSession;
+
+ TNameEntry iNameResult;
+ TInetAddr IpAdd;
+
+ QHostAddress iAddress;
+
+ QHostInfo iResults;
+
+ QList<QHostAddress> iHostAddresses;
+
+ enum {
+ EIdle,
+ EGetByName,
+ EGetByAddress,
+ ECompleteFromCache,
+ EError
+ } iState;
+};
+
+class QSymbianHostInfoLookupManager : public QAbstractHostInfoLookupManager
+{
+ Q_OBJECT
+public:
+ QSymbianHostInfoLookupManager();
+ ~QSymbianHostInfoLookupManager();
+
+ static QSymbianHostInfoLookupManager* globalInstance();
+
+ int id();
+ void clear();
+
+ // called from QHostInfo
+ void scheduleLookup(QSymbianHostResolver *r);
+ void abortLookup(int id);
+
+ // called from QSymbianHostResolver
+ void lookupFinished(QSymbianHostResolver *r);
+
+private:
+ void runNextLookup();
+
+ // this is true for single threaded use, with multiple threads the max is ((number of threads) + KMaxConcurrentLookups - 1)
+ static const int KMaxConcurrentLookups = 5;
+
+ QList<QSymbianHostResolver*> iCurrentLookups;
+ QList<QSymbianHostResolver*> iScheduledLookups;
+
+ QMutex mutex;
+};
+#endif
+
+
+
+QT_END_NAMESPACE
+
+#endif // QHOSTINFO_P_H