These classes are relevant to threaded applications.
| QMutex | The QMutex class provides access serialization between threads. |
| QMutexLocker | The QMutexLocker class is a convenience class that simplifies locking and unlocking mutexes. |
| QReadLocker | The QReadLocker class is a convenience class that simplifies locking and unlocking read-write locks for read access. |
| QReadWriteLock | The QReadWriteLock class provides read-write locking. |
| QSemaphore | The QSemaphore class provides a general counting semaphore. |
| QThread | The QThread class provides platform-independent threads. |
| QThreadStorage | The QThreadStorage class provides per-thread data storage. |
| QWaitCondition | The QWaitCondition class provides a condition variable for synchronizing threads. |
| QWriteLocker | The QWriteLocker class is a convenience class that simplifies locking and unlocking read-write locks for write access. |