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Multithreaded Work Synchronization in C#/.NET — Part 4
- The ReaderWriterLockSlim is a specialized synchronization primitive in C# designed for scenarios with both read and write operations.
- It separates non-mutating read operations from mutating write operations, akin to CQRS/CQS principles.
- Reader threads can access the lock concurrently, while a single writer gains exclusive access.
- UpgradableLock in ReaderWriterLockSlim allows threads to upgrade a read lock to a write lock, optimizing usage.
- Interlocked class provides atomic operations like Interlocked.Increment() for thread-safe incrementing.
- Using Interlocked methods directly on CPU instructions offers more efficient atomic operations compared to locks.
- Interlocked.CompareExchange implements atomic operation with Compare-and-Swap (CAS) instruction.
- SpinLock and SpinWait are low-level primitives that avoid context switching overhead but should be used judiciously.
- SpinWait prevents blocking the process by forcing a context switch after a certain number of spins to perform other tasks.
- Selecting the right synchronization mechanism in C#/.NET entails considering performance, context, and proper profiling.
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