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  1. namespace locking
  2. {
  3. 	public class LockTest
  4. 	{
  5. 		private ReaderWriterLockSlim m_lock = new();
  6.  
  7. 		public void DoWork(int i)
  8. 		{
  9. 			Console.WriteLine($"{i}: DoWork()");
  10. 			m_lock.EnterUpgradeableReadLock();
  11. 			Console.WriteLine($"{i}: acquired read lock");
  12. 			try
  13. 			{
  14. 				Thread.Yield();
  15. 				Thread.Sleep(500);
  16. 				Thread.Yield();
  17. 				Console.WriteLine($"{i}: sleep complete");
  18. 				if (m_lock.TryEnterWriteLock(timeout: TimeSpan.FromMilliseconds(500)))
  19. 				{
  20. 					try
  21. 					{
  22. 						Console.WriteLine($"{i}: acquired write lock");
  23. 						Thread.Yield();
  24. 						Thread.Sleep(500);
  25. 						Thread.Yield();
  26. 					}
  27. 					finally
  28. 					{
  29. 						m_lock.ExitWriteLock();
  30. 						Console.WriteLine($"{i}: released write lock");
  31. 						Thread.Yield();
  32. 					}
  33. 				}
  34. 				else
  35. 				{
  36. 					Console.WriteLine($"{i}: failed to acquire write lock");
  37. 					Thread.Yield();
  38. 				}
  39. 			}
  40. 			finally
  41. 			{
  42. 				m_lock.ExitUpgradeableReadLock();
  43. 				Console.WriteLine($"{i}: released read lock");
  44. 			}
  45. 		}
  46. 	}
  47.  
  48. 	internal class Program
  49. 	{
  50.  
  51. 		static void Main(string[] args)
  52. 		{
  53. 			var lockTest = new LockTest();
  54. 			var tasks = Enumerable.Range(1, 10).Select(i => Task.Run(() => lockTest.DoWork(i))).ToArray();
  55. 			Task.WaitAll(tasks);
  56. 		}
  57. 	}
  58. }
  59.  
Success #stdin #stdout 0.08s 32008KB
comments (?)
stdin
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Standard input is empty
stdout
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1: DoWork()
1: acquired read lock
2: DoWork()
1: sleep complete
1: acquired write lock
1: released write lock
1: released read lock
2: acquired read lock
3: DoWork()
2: sleep complete
2: acquired write lock
4: DoWork()
2: released write lock
2: released read lock
5: DoWork()
3: acquired read lock
3: sleep complete
3: acquired write lock
6: DoWork()
3: released write lock
3: released read lock
7: DoWork()
4: acquired read lock
4: sleep complete
4: acquired write lock
8: DoWork()
4: released write lock
4: released read lock
9: DoWork()
5: acquired read lock
5: sleep complete
5: acquired write lock
10: DoWork()
5: released write lock
5: released read lock
6: acquired read lock
6: sleep complete
6: acquired write lock
6: released write lock
6: released read lock
7: acquired read lock
7: sleep complete
7: acquired write lock
7: released write lock
7: released read lock
8: acquired read lock
8: sleep complete
8: acquired write lock
8: released write lock
8: released read lock
9: acquired read lock
9: sleep complete
9: acquired write lock
9: released write lock
9: released read lock
10: acquired read lock
10: sleep complete
10: acquired write lock
10: released write lock
10: released read lock
https://ideone.com/4ywdqs
language:
C# (NET 6.0)
created:
10 hours ago
visibility:
public

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