KMemFile Class Reference

#include <kmemfile.h>

Inheritance diagram for KMemFile:

Public Member Functions
	KMemFile (const QString &filename, QObject *parent=0)
virtual	~KMemFile ()
virtual void	close ()
virtual bool	isSequential () const
virtual bool	open (OpenMode mode)
virtual bool	seek (qint64 pos)
virtual qint64	size () const
Public Member Functions inherited from QIODevice
	QIODevice ()
	QIODevice (QObject *parent)
virtual	~QIODevice ()
void	aboutToClose ()
Offset	at () const
bool	at (Offset offset)
virtual bool	atEnd () const
virtual qint64	bytesAvailable () const
virtual qint64	bytesToWrite () const
void	bytesWritten (qint64 bytes)
virtual bool	canReadLine () const
QString	errorString () const
int	flags () const
int	getch ()
bool	getChar (char *c)
bool	isAsynchronous () const
bool	isBuffered () const
bool	isCombinedAccess () const
bool	isDirectAccess () const
bool	isInactive () const
bool	isOpen () const
bool	isRaw () const
bool	isReadable () const
bool	isSequentialAccess () const
bool	isSynchronous () const
bool	isTextModeEnabled () const
bool	isTranslated () const
bool	isWritable () const
int	mode () const
virtual bool	open (QFlags< QIODevice::OpenModeFlag > mode)
OpenMode	openMode () const
qint64	peek (char *data, qint64 maxSize)
QByteArray	peek (qint64 maxSize)
virtual qint64	pos () const
int	putch (int ch)
bool	putChar (char c)
qint64	read (char *data, qint64 maxSize)
QByteArray	read (qint64 maxSize)
QByteArray	readAll ()
qint64	readBlock (char *data, quint64 size)
void	readChannelFinished ()
QByteArray	readLine (qint64 maxSize)
qint64	readLine (char *data, qint64 maxSize)
void	readyRead ()
virtual bool	reset ()
void	resetStatus ()
void	setTextModeEnabled (bool enabled)
int	state () const
Status	status () const
int	ungetch (int ch)
void	ungetChar (char c)
virtual bool	waitForBytesWritten (int msecs)
virtual bool	waitForReadyRead (int msecs)
qint64	write (const char *data)
qint64	write (const char *data, qint64 maxSize)
qint64	write (const QByteArray &byteArray)
qint64	writeBlock (const QByteArray &data)
qint64	writeBlock (const char *data, quint64 size)
Public Member Functions inherited from QObject
	QObject (QObject *parent)
	QObject (QObject *parent, const char *name)
virtual	~QObject ()
bool	blockSignals (bool block)
QObject *	child (const char *objName, const char *inheritsClass, bool recursiveSearch) const
const QObjectList &	children () const
const char *	className () const
bool	connect (const QObject *sender, const char *signal, const char *method, Qt::ConnectionType type) const
void	deleteLater ()
void	destroyed (QObject *obj)
bool	disconnect (const QObject *receiver, const char *method)
bool	disconnect (const char *signal, const QObject *receiver, const char *method)
void	dumpObjectInfo ()
void	dumpObjectTree ()
QList< QByteArray >	dynamicPropertyNames () const
virtual bool	event (QEvent *e)
virtual bool	eventFilter (QObject *watched, QEvent *event)
T	findChild (const QString &name) const
QList< T >	findChildren (const QRegExp &regExp) const
QList< T >	findChildren (const QString &name) const
bool	inherits (const char *className) const
void	insertChild (QObject *object)
void	installEventFilter (QObject *filterObj)
bool	isA (const char *className) const
bool	isWidgetType () const
void	killTimer (int id)
virtual const QMetaObject *	metaObject () const
void	moveToThread (QThread *targetThread)
const char *	name () const
const char *	name (const char *defaultName) const
QString	objectName () const
QObject *	parent () const
QVariant	property (const char *name) const
void	removeChild (QObject *object)
void	removeEventFilter (QObject *obj)
void	setName (const char *name)
void	setObjectName (const QString &name)
void	setParent (QObject *parent)
bool	setProperty (const char *name, const QVariant &value)
bool	signalsBlocked () const
int	startTimer (int interval)
QThread *	thread () const

Static Public Member Functions
static void	fileContentsChanged (const QString &filename)
Static Public Member Functions inherited from QObject
bool	connect (const QObject *sender, const char *signal, const QObject *receiver, const char *method, Qt::ConnectionType type)
bool	connect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method, Qt::ConnectionType type)
bool	disconnect (const QObject *sender, const char *signal, const QObject *receiver, const char *method)
bool	disconnect (const QObject *sender, const QMetaMethod &signal, const QObject *receiver, const QMetaMethod &method)
QString	tr (const char *sourceText, const char *disambiguation, int n)
QString	trUtf8 (const char *sourceText, const char *disambiguation, int n)

Protected Member Functions
virtual qint64	readData (char *data, qint64 maxSize)
virtual qint64	writeData (const char *data, qint64 maxSize)
Protected Member Functions inherited from QIODevice
virtual qint64	readData (char *data, qint64 maxSize)=0
virtual qint64	readLineData (char *data, qint64 maxSize)
void	setErrorString (const QString &str)
void	setOpenMode (QFlags< QIODevice::OpenModeFlag > openMode)
virtual qint64	writeData (const char *data, qint64 maxSize)=0
Protected Member Functions inherited from QObject
bool	checkConnectArgs (const char *signal, const QObject *object, const char *method)
virtual void	childEvent (QChildEvent *event)
virtual void	connectNotify (const char *signal)
virtual void	customEvent (QEvent *event)
virtual void	disconnectNotify (const char *signal)
int	receivers (const char *signal) const
QObject *	sender () const
int	senderSignalIndex () const
virtual void	timerEvent (QTimerEvent *event)

Additional Inherited Members
Public Attributes inherited from QIODevice
typedef	Offset
typedef	OpenMode
typedef	Status
Static Protected Member Functions inherited from QObject
QByteArray	normalizeSignalSlot (const char *signalSlot)
Properties inherited from QObject
	objectName

Detailed Description

Simple QIODevice for QSharedMemory to keep ksycoca cache in memory only once The first call to open() loads the file into a shm segment. Every subsequent call only attaches to this segment. When the file content changed, you have to execute KMemFile::fileContentsChanged() to update the internal structures. The next call to open() creates a new shm segment. The old one is automatically destroyed when the last process closed KMemFile.

Definition at line 39 of file kmemfile.h.

Constructor & Destructor Documentation

KMemFile::KMemFile ( const QString &  filename, QObject *  parent = 0  )

explicit

ctor

Parameters

filename	the file to load into memory
parent	our parent

Definition at line 118 of file kmemfile.cpp.

KMemFile::~KMemFile ( )

virtual

dtor

Definition at line 124 of file kmemfile.cpp.

Member Function Documentation

void KMemFile::close ( )

virtual

closes the KMemFile

Reimplemented from superclass.

Reimplemented from QIODevice.

Definition at line 130 of file kmemfile.cpp.

void KMemFile::fileContentsChanged ( const QString &  filename )

static

This static function updates the internal information about the file loaded into shared memory.

The next time the file is opened, the file is reread from the file system.

Definition at line 238 of file kmemfile.cpp.

bool KMemFile::isSequential ( ) const

virtual

As KMemFile is a random access device, it returns false.

Reimplemented from superclass.

Reimplemented from QIODevice.

Definition at line 138 of file kmemfile.cpp.

bool KMemFile::open ( OpenMode  mode )

virtual

Reimplemented from superclass.

Parameters

mode	only QIODevice::ReadOnly is accepted

Definition at line 143 of file kmemfile.cpp.

qint64 KMemFile::readData ( char *  data, qint64  maxSize  )

protectedvirtual

Reimplemented from superclass.

Definition at line 220 of file kmemfile.cpp.

bool KMemFile::seek ( qint64  pos )

virtual

Sets the current read/write position to pos.

Reimplemented from superclass.

Parameters

pos	the new read/write position

Reimplemented from QIODevice.

Definition at line 204 of file kmemfile.cpp.

qint64 KMemFile::size ( ) const

virtual

Returns the size of the file.

Reimplemented from superclass.

Reimplemented from QIODevice.

Definition at line 215 of file kmemfile.cpp.

qint64 KMemFile::writeData ( const char *  data, qint64  maxSize  )

protectedvirtual

Reimplemented from superclass.

Definition at line 233 of file kmemfile.cpp.

---

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

• kmemfile.h
• kmemfile.cpp