KDECore
KMemFile Class Reference
#include <kmemfile.h>

Public Member Functions | |
virtual void | close () |
virtual bool | isSequential () const |
KMemFile (const QString &filename, QObject *parent=0) | |
virtual bool | open (OpenMode mode) |
virtual bool | seek (qint64 pos) |
virtual qint64 | size () const |
virtual | ~KMemFile () |
Static Public Member Functions | |
static void | fileContentsChanged (const QString &filename) |
Protected Member Functions | |
virtual qint64 | readData (char *data, qint64 maxSize) |
virtual qint64 | writeData (const char *data, qint64 maxSize) |
Detailed Description
For internal use only.
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 37 of file kmemfile.h.
Constructor & Destructor Documentation
ctor
- Parameters:
-
filename the file to load into memory parent our parent
Definition at line 116 of file kmemfile.cpp.
KMemFile::~KMemFile | ( | ) | [virtual] |
Member Function Documentation
void KMemFile::close | ( | ) | [virtual] |
closes the KMemFile
- Reimplemented from superclass.
Reimplemented from QIODevice.
Definition at line 128 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 236 of file kmemfile.cpp.
bool KMemFile::isSequential | ( | ) | const [virtual] |
As KMemFile is a random access device, it returns false.
- Reimplemented from superclass.
Definition at line 136 of file kmemfile.cpp.
bool KMemFile::open | ( | OpenMode | mode | ) | [virtual] |
- Reimplemented from superclass.
- Parameters:
-
mode only QIODevice::ReadOnly is accepted
Reimplemented from QIODevice.
Definition at line 141 of file kmemfile.cpp.
qint64 KMemFile::readData | ( | char * | data, | |
qint64 | maxSize | |||
) | [protected, virtual] |
- Reimplemented from superclass.
Reimplemented from QIODevice.
Definition at line 218 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 202 of file kmemfile.cpp.
qint64 KMemFile::size | ( | ) | const [virtual] |
Returns the size of the file.
- Reimplemented from superclass.
Definition at line 213 of file kmemfile.cpp.
qint64 KMemFile::writeData | ( | const char * | data, | |
qint64 | maxSize | |||
) | [protected, virtual] |
- Reimplemented from superclass.
Reimplemented from QIODevice.
Definition at line 231 of file kmemfile.cpp.
The documentation for this class was generated from the following files: