> -----Original Message----- > From: Ben Forta [mailto:ben@;forta.com] > Sent: Friday, November 01, 2002 12:57 PM > To: CF-Talk > Subject: RE: Understanding Locking In CFMX > Which simply means that any time there can be concurrent access to data > from different threads there is a risk for a race condition. The > simplest example? If you have a dozen variables in a shared scope and > some other process were to read those during an update then there is a > risk that the thread reading the data may have 6 variables with old > values and 6 with new values. That should not trash your server, but it > may mess with your application - that is your choice.
I guess that is my point -- if there is no concrete answer on when to lock, I'd lock all the time so I don't have to worry about it. > Any application or development language that allows multiple threads to > access shared data has to deal with it - operating systems do, as do > DBMSs, as do development languages. It is not a CF issue at all. I am aware of that, it just seems like the "when and where" issue of locking is even more sketchy with CFMX than it was beforehand. > What was a CF issue was possible memory corruption pre-CFMX. That's been > fixed. Race conditions? That's for you to determine if they pose a > problem for your particular application. The problem that I have with looking at an app and trying to figure out if I am going to need to lock is, I might as well lock because if I ever have to add or modify the application, I'll be wasting time going back and locking other code because new code I've written might cause a race condition with the prior code. Thanks for the additional insight! Andy ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~| Archives: http://www.houseoffusion.com/cf_lists/index.cfm?forumid=4 Subscription: http://www.houseoffusion.com/cf_lists/index.cfm?method=subscribe&forumid=4 FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Structure your ColdFusion code with Fusebox. Get the official book at http://www.fusionauthority.com/bkinfo.cfm
