These classes are relevant to threaded applications.
| QSystemReadWriteLock | Read-write locking between processes |
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| QAtomicInt | Platform-independent atomic operations on integers |
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| QAtomicPointer | Template class that provides platform-independent atomic operations on pointers |
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| QMutex | Access serialization between threads |
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| QMutexLocker | Convenience class that simplifies locking and unlocking mutexes |
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| QReadLocker | Convenience class that simplifies locking and unlocking read-write locks for read access |
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| QReadWriteLock | Read-write locking |
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| QSemaphore | General counting semaphore |
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| QThread | Platform-independent threads |
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| QThreadStorage | Per-thread data storage |
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| QWaitCondition | Condition variable for synchronizing threads |
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| QWriteLocker | Convenience class that simplifies locking and unlocking read-write locks for write access |
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| QtConcurrent | High-level APIs that make it possible to write multi-threaded programs without using low-level threading primitives |
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