QWriteLocker Class ReferenceThe QWriteLocker class is a convenience class that simplifies locking and unlocking read-write locks for write access. More... #include <QWriteLocker> Note: All functions in this class are thread-safe. Public Functions
Detailed DescriptionThe QWriteLocker class is a convenience class that simplifies locking and unlocking read-write locks for write access. The purpose of QWriteLocker (and 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: QReadWriteLock lock; void writeData(const QByteArray &data) { QWriteLocker locker(&lock); ... } It is equivalent to the following code: QReadWriteLock lock; void writeData(const QByteArray &data) { lock.lockForWrite(); ... lock.unlock(); } The QMutexLocker documentation shows examples where the use of a locker object greatly simplifies programming. See also QReadLocker and QReadWriteLock. Member Function Documentation
|