> > > if i understand correctly, a week or so ago you (dave) > > > mentioned that duplicate was only necessary for a session > > > structure if it contained other complex variables. you said > > > that StructCopy was sufficient if it was merely a structure > > > with simple variables. is this correct? > > > > Yes, that's correct. Personally, I just use Duplicate > > whenever I want to pass a structure by value, so I don't even > > think about it. > > Why not just copy the pointer from the session scope to the > request scope? Wouldn't the single-threaded nature of the request > scope protect the actual data from corruption?
There's a problem with the phrase "copy a pointer". If you interpret that to mean, "pass a variable by reference", then no, it wouldn't prevent concurrent access to the variables requiring protection. > I suppose the question I have is HOW does the CF server force > single threading in the request scope: > > 1. By forcing every request into its own memory space or > 2. By internally recognizing and locking the data associated with > the request scope I think you may have a misunderstanding about the nature of the Request scope. There's nothing that the CF server needs to do to force single threading in the Request scope, because the Request scope isn't a persistent memory scope in the same way that, say, the Session scope is. The Request scope is only available to the scripts used to respond to a single HTTP request, and those scripts are procedural - they execute "from top to bottom", so to speak. Dave Watts, CTO, Fig Leaf Software http://www.figleaf.com/ voice: (202) 797-5496 fax: (202) 797-5444 ______________________________________________________________________ Why Share? Dedicated Win 2000 Server � PIII 800 / 256 MB RAM / 40 GB HD / 20 GB MO/XFER Instant Activation � $99/Month � Free Setup http://www.pennyhost.com/redirect.cfm?adcode=coldfusionc FAQ: http://www.thenetprofits.co.uk/coldfusion/faq Archives: http://www.mail-archive.com/[email protected]/ Unsubscribe: http://www.houseoffusion.com/index.cfm?sidebar=lists
