[RESOLVED] [2005] Threading and Synchronization

[GottaGetITDone]

Top of the morning to you all!

I am just having a little trouble understanding thread synchronization. Allow me to demonstrate.

I have a class that exposes 3 methods like so:

     Class a

        Private x As Collection

        Public Sub Add()

        End Sub

        Public Sub Remove()

        End Sub

        Public Sub Print()
            For counter As Integer = 0 To x.Count-1 Step 1

            Next counter
        End Sub
    End Class

Now I have declared an instance of 'class a' and multiple threads are able to perform actions upon it.

My problem comes when one thread is running a print operation and another may be removing an item from the collection. The print operation is printing the data in a loop, when the loop began 'counter' was set to the count of the collection. The collection's size has since changed and we are headed for an "index out of bounds" error.

I need to lock the instance of the class as a whole so that only one thread can perform operations on the instance at any one time.

I know about the 'SyncLock' feature but am unsure if this is sufficient. Is the answer just to synclock the calls to the class methods? E.G...

Dim objSync as Object

SyncLock objSync
   instance.Print()
End SyncLock

Any pointers or leads would be greatly appreciated,
Have a great morning!
Matt.