QPollingFileSystemWatcherEngine Class Reference

Inheritance diagram for QPollingFileSystemWatcherEngine:

[legend]Collaboration diagram for QPollingFileSystemWatcherEngine:

[legend]List of all members.

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Detailed Description

Definition at line 46 of file qfilesystemwatcher.cpp.

Public Member Functions
	QPollingFileSystemWatcherEngine ()
void	run ()
QStringList	addPaths (const QStringList &paths, QStringList *files, QStringList *directories)
QStringList	removePaths (const QStringList &paths, QStringList *files, QStringList *directories)
void	stop ()
Private Slots
void	timeout ()
Private Attributes
QMutex	mutex
QHash< QString, QDateTime >	files
QHash< QString, QDateTime >	directories

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Constructor & Destructor Documentation

QPollingFileSystemWatcherEngine::QPollingFileSystemWatcherEngine

(

)

Definition at line 67 of file qfilesystemwatcher.cpp.

References QObject::moveToThread().

{
    moveToThread(this);
}

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Member Function Documentation

void QPollingFileSystemWatcherEngine::run

(

)

[virtual]

This method is pure virtual and must be implemented in derived classes in order to do useful work. Returning from this method will end the execution of the thread.

See also:

wait()

Implements QThread.

Definition at line 72 of file qfilesystemwatcher.cpp.

References QObject::connect(), QThread::exec(), PollingInterval, SIGNAL, SLOT, QTimer::start(), and timeout().

{
    QTimer timer;
    connect(&timer, SIGNAL(timeout()), SLOT(timeout()));
    timer.start(PollingInterval);
    (void) exec();
}

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QStringList QPollingFileSystemWatcherEngine::addPaths	(	const QStringList &	paths,
		QStringList *	files,
		QStringList *	directories
	)			[virtual]

Implements QFileSystemWatcherEngine.

Definition at line 80 of file qfilesystemwatcher.cpp.

References QHash< Key, T >::contains(), directories, QFileInfo::exists(), files, QHash< Key, T >::insert(), QFileInfo::isDir(), QFileInfo::lastModified(), mutex, p, path, and QThread::start().

{
    QMutexLocker locker(&mutex);
    QStringList p = paths;
    QMutableListIterator<QString> it(p);
    while (it.hasNext()) {
        QString path = it.next();
        QFileInfo fi(path);
        if (!fi.exists())
            continue;
        if (fi.isDir()) {
            if (!directories->contains(path))
                directories->append(path);
            this->directories.insert(path, fi.lastModified());
        } else {
            if (!files->contains(path))
                files->append(path);
            this->files.insert(path, fi.lastModified());
        }
        it.remove();
    }
    start();
    return p;
}

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QStringList QPollingFileSystemWatcherEngine::removePaths	(	const QStringList &	paths,
		QStringList *	files,
		QStringList *	directories
	)			[virtual]

Implements QFileSystemWatcherEngine.

Definition at line 107 of file qfilesystemwatcher.cpp.

References directories, files, QHash< Key, T >::isEmpty(), mutex, p, path, QHash< Key, T >::remove(), stop(), QMutexLocker::unlock(), and QThread::wait().

{
    QMutexLocker locker(&mutex);
    QStringList p = paths;
    QMutableListIterator<QString> it(p);
    while (it.hasNext()) {
        QString path = it.next();
        if (this->directories.remove(path)) {
            directories->removeAll(path);
            it.remove();
        } else if (this->files.remove(path)) {
            files->removeAll(path);
            it.remove();
        }
    }
    if (this->files.isEmpty() && this->directories.isEmpty()) {
        locker.unlock();
        stop();
        wait();
    }
    return p;
}

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void QPollingFileSystemWatcherEngine::stop

(

)

[virtual]

Implements QFileSystemWatcherEngine.

Definition at line 132 of file qfilesystemwatcher.cpp.

References QMetaObject::invokeMethod().

Referenced by removePaths().

{
    QMetaObject::invokeMethod(this, "quit");
}

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void QPollingFileSystemWatcherEngine::timeout

(

)

[private, slot]

Definition at line 137 of file qfilesystemwatcher.cpp.

References directories, QFileSystemWatcherEngine::directoryChanged(), emit, QFileInfo::exists(), QFileSystemWatcherEngine::fileChanged(), files, QFileInfo::lastModified(), mutex, path, and x.

Referenced by run().

{
    QMutexLocker locker(&mutex);
    QMutableHashIterator<QString, QDateTime> fit(files);
    while (fit.hasNext()) {
        QHash<QString, QDateTime>::iterator x = fit.next();
        QString path = x.key();
        QFileInfo fi(path);
        if (!fi.exists()) {
            fit.remove();
            emit fileChanged(path, true);
        } else if (x.value() != fi.lastModified()) {
            x.value() = fi.lastModified();
            emit fileChanged(path, false);
        }
    }
    QMutableHashIterator<QString, QDateTime> dit(directories);
    while (dit.hasNext()) {
        QHash<QString, QDateTime>::iterator x = dit.next();
        QString path = x.key();
        QFileInfo fi(path);
        if (!fi.exists()) {
            dit.remove();
            emit directoryChanged(path, true);
        } else if (x.value() != fi.lastModified()) {
            x.value() = fi.lastModified();
            emit directoryChanged(path, false);
        }
    }
}

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Member Data Documentation

QMutex QPollingFileSystemWatcherEngine::mutex [mutable, private]

Definition at line 50 of file qfilesystemwatcher.cpp.

Referenced by addPaths(), removePaths(), and timeout().

QHash<QString, QDateTime> QPollingFileSystemWatcherEngine::files [private]

Definition at line 51 of file qfilesystemwatcher.cpp.

Referenced by addPaths(), removePaths(), and timeout().

QHash<QString, QDateTime> QPollingFileSystemWatcherEngine::directories [private]

Definition at line 51 of file qfilesystemwatcher.cpp.

Referenced by addPaths(), removePaths(), and timeout().

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

• src/corelib/io/qfilesystemwatcher.cpp

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