The purpose of
QReadLocker ) is to simplify
QReadWriteLock locking and unlocking. Locking and unlocking statements or in exception handling code is error-prone and difficult to debug.
QWriteLocker can be used in such situations to ensure that the state of the lock is always well-defined.
Here’s an example that uses
QWriteLocker to lock and unlock a read-write lock for writing:
lock = QReadWriteLock() def writeData(data): locker = QWriteLocker(lock) ...
It is equivalent to the following code:
lock = QReadWriteLock() def writeData(data): lock.lockForWrite() ... lock.unlock()
QMutexLocker documentation shows examples where the use of a locker object greatly simplifies programming.
- class PySide6.QtCore.QWriteLocker(readWriteLock)¶
- PySide6.QtCore.QWriteLocker.__exit__(arg__1, arg__2, arg__3)¶
arg__1 – object
arg__2 – object
arg__3 – object
Returns a pointer to the read-write lock that was passed to the constructor.
Relocks an unlocked lock.
Unlocks the lock associated with this locker.
© 2022 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.