#include <qhostinfo_p.h>

Inheritance diagram for QHostInfoLookupManager:

Public Functions
void	abortLookup (int id)

void	clear ()

void	lookupFinished (QHostInfoRunnable *r)

	QHostInfoLookupManager ()

void	scheduleLookup (QHostInfoRunnable *r)

bool	wasAborted (int id)

void	work ()

	~QHostInfoLookupManager ()

Public Functions inherited from QAbstractHostInfoLookupManager
	~QAbstractHostInfoLookupManager ()

Public Functions inherited from QObject
bool	blockSignals (bool b)
	If block is true, signals emitted by this object are blocked (i.e., emitting a signal will not invoke anything connected to it). More...

const QObjectList &	children () const
	Returns a list of child objects. More...

bool	connect (const QObject sender, const char signal, const char *member, Qt::ConnectionType type=Qt::AutoConnection) const

bool	disconnect (const char signal=0, const QObject receiver=0, const char *member=0)

bool	disconnect (const QObject receiver, const char member=0)

void	dumpObjectInfo ()
	Dumps information about signal connections, etc. More...

void	dumpObjectTree ()
	Dumps a tree of children to the debug output. More...

QList< QByteArray >	dynamicPropertyNames () const
	Returns the names of all properties that were dynamically added to the object using setProperty(). More...

virtual bool	event (QEvent *)
	This virtual function receives events to an object and should return true if the event e was recognized and processed. More...

virtual bool	eventFilter (QObject , QEvent )
	Filters events if this object has been installed as an event filter for the watched object. More...

template<typename T >
T	findChild (const QString &aName=QString()) const
	Returns the child of this object that can be cast into type T and that is called name, or 0 if there is no such object. More...

template<typename T >
QList< T >	findChildren (const QString &aName=QString()) const
	Returns all children of this object with the given name that can be cast to type T, or an empty list if there are no such objects. More...

template<typename T >
QList< T >	findChildren (const QRegExp &re) const

bool	inherits (const char *classname) const
	Returns true if this object is an instance of a class that inherits className or a QObject subclass that inherits className; otherwise returns false. More...

void	installEventFilter (QObject *)
	Installs an event filter filterObj on this object. More...

bool	isWidgetType () const
	Returns true if the object is a widget; otherwise returns false. More...

void	killTimer (int id)
	Kills the timer with timer identifier, id. More...

virtual const QMetaObject *	metaObject () const
	Returns a pointer to the meta-object of this object. More...

void	moveToThread (QThread *thread)
	Changes the thread affinity for this object and its children. More...

QString	objectName () const

QObject *	parent () const
	Returns a pointer to the parent object. More...

QVariant	property (const char *name) const
	Returns the value of the object's name property. More...

Q_INVOKABLE	QObject (QObject *parent=0)
	Constructs an object with parent object parent. More...

void	removeEventFilter (QObject *)
	Removes an event filter object obj from this object. More...

void	setObjectName (const QString &name)

void	setParent (QObject *)
	Makes the object a child of parent. More...

bool	setProperty (const char *name, const QVariant &value)
	Sets the value of the object's name property to value. More...

void	setUserData (uint id, QObjectUserData *data)

bool	signalsBlocked () const
	Returns true if signals are blocked; otherwise returns false. More...

int	startTimer (int interval)
	Starts a timer and returns a timer identifier, or returns zero if it could not start a timer. More...

QThread *	thread () const
	Returns the thread in which the object lives. More...

QObjectUserData *	userData (uint id) const

virtual	~QObject ()
	Destroys the object, deleting all its child objects. More...

Protected Variables
QList< int >	abortedLookups

QList< QHostInfoRunnable * >	currentLookups

QList< QHostInfoRunnable * >	finishedLookups

QMutex	mutex

QList< QHostInfoRunnable * >	postponedLookups

QQueue< QHostInfoRunnable * >	scheduledLookups

QThreadPool	threadPool

bool	wasDeleted

Protected Variables inherited from QObject
QScopedPointer< QObjectData >	d_ptr

Private Slots
void	waitForThreadPoolDone ()

Friends
class	QHostInfoRunnable

Additional Inherited Members
Public Slots inherited from QObject
void	deleteLater ()
	Schedules this object for deletion. More...

Signals inherited from QObject
void	destroyed (QObject *=0)
	This signal is emitted immediately before the object obj is destroyed, and can not be blocked. More...

Static Public Functions inherited from QObject
static bool	connect (const QObject sender, const char signal, const QObject receiver, const char member, Qt::ConnectionType=Qt::AutoConnection)
	Creates a connection of the given type from the signal in the sender object to the method in the receiver object. More...

static bool	connect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &method, Qt::ConnectionType type=Qt::AutoConnection)

static bool	disconnect (const QObject sender, const char signal, const QObject receiver, const char member)
	Disconnects signal in object sender from method in object receiver. More...

static bool	disconnect (const QObject sender, const QMetaMethod &signal, const QObject receiver, const QMetaMethod &member)

static uint	registerUserData ()

static QString	tr (const char sourceText, const char comment=0, int n=-1)

static QString	trUtf8 (const char sourceText, const char comment=0, int n=-1)

Public Variables inherited from QAbstractHostInfoLookupManager
QHostInfoCache	cache

Static Public Variables inherited from QObject
static const QMetaObject	staticMetaObject
	This variable stores the meta-object for the class. More...

Protected Functions inherited from QAbstractHostInfoLookupManager
	QAbstractHostInfoLookupManager ()

Protected Functions inherited from QObject
virtual void	childEvent (QChildEvent *)
	This event handler can be reimplemented in a subclass to receive child events. More...

virtual void	connectNotify (const char *signal)
	This virtual function is called when something has been connected to signal in this object. More...

virtual void	customEvent (QEvent *)
	This event handler can be reimplemented in a subclass to receive custom events. More...

virtual void	disconnectNotify (const char *signal)
	This virtual function is called when something has been disconnected from signal in this object. More...

	QObject (QObjectPrivate &dd, QObject *parent=0)

int	receivers (const char *signal) const
	Returns the number of receivers connected to the signal. More...

QObject *	sender () const
	Returns a pointer to the object that sent the signal, if called in a slot activated by a signal; otherwise it returns 0. More...

int	senderSignalIndex () const

virtual void	timerEvent (QTimerEvent *)
	This event handler can be reimplemented in a subclass to receive timer events for the object. More...

Static Protected Functions inherited from QAbstractHostInfoLookupManager
static QAbstractHostInfoLookupManager *	globalInstance ()

Static Protected Variables inherited from QObject
static const QMetaObject	staticQtMetaObject

Related Functions inherited from QObject
T	qFindChildqFindChildren (const QObject *obj, const QString &name)()

QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QString &name)()

QList< T >	qFindChildrenqFindChildren (const QObject *obj, const QRegExp &regExp)()

T *	qobject_cast (QObject *object)

	QObjectList

void *	qt_find_obj_child (QObject parent, const char type, const QString &name)
	Returns a pointer to the object named name that inherits type and with a given parent. More...

Detailed Description

Definition at line 194 of file qhostinfo_p.h.

Constructors and Destructors

◆ QHostInfoLookupManager()

QHostInfoLookupManager::QHostInfoLookupManager ( )

Definition at line 561 of file qhostinfo.cpp.

                                                : mutex(QMutex::Recursive), wasDeleted(false)
 {
     moveToThread(QCoreApplicationPrivate::mainThread());
     connect(QCoreApplication::instance(), SIGNAL(destroyed()), SLOT(waitForThreadPoolDone()), Qt::DirectConnection);
     threadPool.setMaxThreadCount(5); // do 5 DNS lookups in parallel
 }

◆ ~QHostInfoLookupManager()

QHostInfoLookupManager::~QHostInfoLookupManager ( )

Definition at line 568 of file qhostinfo.cpp.

 {
     wasDeleted = true;
 
     // don't qDeleteAll currentLookups, the QThreadPool has ownership
     clear();
 }

Functions

◆ abortLookup()

void QHostInfoLookupManager::abortLookup ( int id )

Definition at line 675 of file qhostinfo.cpp.

 {
     if (wasDeleted)
         return;
 
     QMutexLocker locker(&this->mutex);
 
     // is postponed? delete and return
     for (int i = 0; i < postponedLookups.length(); i++) {
         if (postponedLookups.at(i)->id == id) {
             delete postponedLookups.takeAt(i);
             return;
         }
     }
 
     // is scheduled? delete and return
     for (int i = 0; i < scheduledLookups.length(); i++) {
         if (scheduledLookups.at(i)->id == id) {
             delete scheduledLookups.takeAt(i);
             return;
         }
     }
 
     if (!abortedLookups.contains(id))
         abortedLookups.append(id);
 }

◆ clear()

void QHostInfoLookupManager::clear ( )

virtual

Implements QAbstractHostInfoLookupManager.

Definition at line 576 of file qhostinfo.cpp.

Referenced by ~QHostInfoLookupManager().

 {
     {
         QMutexLocker locker(&mutex);
         qDeleteAll(postponedLookups);
         qDeleteAll(scheduledLookups);
         qDeleteAll(finishedLookups);
         postponedLookups.clear();
         scheduledLookups.clear();
         finishedLookups.clear();
     }
 
     threadPool.waitForDone();
     cache.clear();
 }

◆ lookupFinished()

void QHostInfoLookupManager::lookupFinished ( QHostInfoRunnable * r )

Definition at line 713 of file qhostinfo.cpp.

Referenced by QHostInfoRunnable::run().

 {
     if (wasDeleted)
         return;
 
     QMutexLocker locker(&this->mutex);
     currentLookups.removeOne(r);
     finishedLookups.append(r);
     work();
 }

◆ scheduleLookup()

void QHostInfoLookupManager::scheduleLookup ( QHostInfoRunnable * r )

Definition at line 664 of file qhostinfo.cpp.

Referenced by QHostInfo::lookupHost().

 {
     if (wasDeleted)
         return;
 
     QMutexLocker locker(&this->mutex);
     scheduledLookups.enqueue(r);
     work();
 }

◆ waitForThreadPoolDone

void QHostInfoLookupManager::waitForThreadPoolDone ( )

inlineprivateslot

Definition at line 227 of file qhostinfo_p.h.

Referenced by QHostInfoLookupManager().

227 { threadPool.waitForDone(); }

QHostInfoLookupManager::threadPool

QThreadPool threadPool

Definition: qhostinfo_p.h:220

QThreadPool::waitForDone

void waitForDone()

Waits for each thread to exit and removes all threads from the thread pool.

Definition: qthreadpool.cpp:647

◆ wasAborted()

bool QHostInfoLookupManager::wasAborted ( int id )

Definition at line 703 of file qhostinfo.cpp.

Referenced by QHostInfoRunnable::run().

 {
     if (wasDeleted)
         return true;
 
     QMutexLocker locker(&this->mutex);
     return abortedLookups.contains(id);
 }

◆ work()

void QHostInfoLookupManager::work ( )

Definition at line 592 of file qhostinfo.cpp.

Referenced by lookupFinished(), and scheduleLookup().

 {
     if (wasDeleted)
         return;
 
     // goals of this function:
     //  - launch new lookups via the thread pool
     //  - make sure only one lookup per host/IP is in progress
 
     QMutexLocker locker(&mutex);
 
     if (!finishedLookups.isEmpty()) {
         // remove ID from aborted if it is in there
         for (int i = 0; i < finishedLookups.length(); i++) {
            abortedLookups.removeAll(finishedLookups.at(i)->id);
         }
 
         finishedLookups.clear();
     }
 
     if (!postponedLookups.isEmpty()) {
         // try to start the postponed ones
 
         QMutableListIterator<QHostInfoRunnable*> iterator(postponedLookups);
         while (iterator.hasNext()) {
             QHostInfoRunnable* postponed = iterator.next();
 
             // check if none of the postponed hostnames is currently running
             bool alreadyRunning = false;
             for (int i = 0; i < currentLookups.length(); i++) {
                 if (currentLookups.at(i)->toBeLookedUp == postponed->toBeLookedUp) {
                     alreadyRunning = true;
                     break;
                 }
             }
             if (!alreadyRunning) {
                 iterator.remove();
                 scheduledLookups.prepend(postponed); // prepend! we want to finish it ASAP
             }
         }
     }
 
     if (!scheduledLookups.isEmpty()) {
         // try to start the new ones
         QMutableListIterator<QHostInfoRunnable*> iterator(scheduledLookups);
         while (iterator.hasNext()) {
             QHostInfoRunnable *scheduled = iterator.next();
 
             // check if a lookup for this host is already running, then postpone
             for (int i = 0; i < currentLookups.size(); i++) {
                 if (currentLookups.at(i)->toBeLookedUp == scheduled->toBeLookedUp) {
                     iterator.remove();
                     postponedLookups.append(scheduled);
                     scheduled = 0;
                     break;
                 }
             }
 
             if (scheduled && currentLookups.size() < threadPool.maxThreadCount()) {
                 // runnable now running in new thread, track this in currentLookups
                 threadPool.start(scheduled);
                 iterator.remove();
                 currentLookups.append(scheduled);
             } else {
                 // was postponed, continue iterating
                 continue;
             }
         };
     }
 }

Friends and Related Functions

◆ QHostInfoRunnable

friend class QHostInfoRunnable

friend

Definition at line 212 of file qhostinfo_p.h.

Properties

◆ abortedLookups

QList<int> QHostInfoLookupManager::abortedLookups

protected

Definition at line 218 of file qhostinfo_p.h.

Referenced by abortLookup(), wasAborted(), and work().

◆ currentLookups

QList<QHostInfoRunnable*> QHostInfoLookupManager::currentLookups

protected

Definition at line 214 of file qhostinfo_p.h.

Referenced by lookupFinished(), and work().

◆ finishedLookups

QList<QHostInfoRunnable*> QHostInfoLookupManager::finishedLookups

protected

Definition at line 217 of file qhostinfo_p.h.

Referenced by clear(), lookupFinished(), and work().

◆ mutex

QMutex QHostInfoLookupManager::mutex

protected

Definition at line 222 of file qhostinfo_p.h.

Referenced by abortLookup(), clear(), lookupFinished(), QHostInfoRunnable::run(), scheduleLookup(), wasAborted(), and work().

◆ postponedLookups

QList<QHostInfoRunnable*> QHostInfoLookupManager::postponedLookups

protected

Definition at line 215 of file qhostinfo_p.h.

Referenced by abortLookup(), clear(), QHostInfoRunnable::run(), and work().

◆ scheduledLookups

QQueue<QHostInfoRunnable*> QHostInfoLookupManager::scheduledLookups

protected

Definition at line 216 of file qhostinfo_p.h.

Referenced by abortLookup(), clear(), scheduleLookup(), and work().

◆ threadPool

QThreadPool QHostInfoLookupManager::threadPool

protected

Definition at line 220 of file qhostinfo_p.h.

Referenced by clear(), QHostInfoLookupManager(), and work().

◆ wasDeleted

bool QHostInfoLookupManager::wasDeleted

protected

Definition at line 224 of file qhostinfo_p.h.

Referenced by abortLookup(), lookupFinished(), scheduleLookup(), wasAborted(), work(), and ~QHostInfoLookupManager().

The documentation for this class was generated from the following files:

/src/network/kernel/qhostinfo_p.h
/src/network/kernel/qhostinfo.cpp

Public Functions

Protected Variables

Private Slots

Friends

Additional Inherited Members

Detailed Description

Constructors and Destructors

◆ QHostInfoLookupManager()

◆ ~QHostInfoLookupManager()

Functions

◆ abortLookup()

◆ clear()

◆ lookupFinished()

◆ scheduleLookup()

◆ waitForThreadPoolDone

◆ wasAborted()

◆ work()

Friends and Related Functions

◆ QHostInfoRunnable

Properties

◆ abortedLookups

◆ currentLookups

◆ finishedLookups

◆ mutex

◆ postponedLookups

◆ scheduledLookups

◆ threadPool

◆ wasDeleted