If you use the ReaderWriterLockSlim class, you will get a LockRecursionException. In the case of
ReaderWriterLock, you’ll get a runtime exception for trying to release a lock that is not owned by the calling thread.
Code examples
Noncompliant code example
Public Class Example
Private Shared rwLock As New ReaderWriterLock()
Public Sub Writer()
rwLock.AcquireWriterLock(2000)
Try
' ...
Finally
rwLock.ReleaseReaderLock() ' Noncompliant, will throw runtime exception
End Try
End Sub
Public Sub Reader()
rwLock.AcquireReaderLock(2000)
Try
' ...
Finally
rwLock.ReleaseWriterLock() ' Noncompliant, will throw runtime exception
End Try
End Sub
End Class
Compliant solution
Public Class Example
Private Shared rwLock As New ReaderWriterLock()
Public Shared Sub Writer()
rwLock.AcquireWriterLock(2000)
Try
' ...
Finally
rwLock.ReleaseWriterLock()
End Try
End Sub
Public Shared Sub Reader()
rwLock.AcquireReaderLock(2000)
Try
' ...
Finally
rwLock.ReleaseReaderLock()
End Try
End Sub
End Class
