On Thu, 6 Jul 2006 14:57:32 -0400 "Craddock, Chris" <[EMAIL PROTECTED]> wrote:
:>Ed (and Jeff Smith) asked :>> Are you sure PLO can be used this way? Will the "compare" portion work :>> against arbitrary values not serialized/updated using PLO? :>Well now that you mention it, I'm NOT sure. The compare and load :>functions are supposed to be for following chains that can change while :>you're looking at them. I had a conversation about PLO with Bob Rogers a :>long time ago and came away with the impression that the operands were :>fetched (in the normal way) -before- the comparison was made, so if you :>got CC=0 then, at least in the compare and load case, you had a :>point-in-time consistent view which is all that I wanted. I haven't :>actually used this "trick" anywhere and since it might not actually work :>the way I thought, I won't use it. I can't blame Bob because I was :>probably reading between the lines of what he said anyway. My understanding of PLO is that it only serializes with the specified lock number/address. -- Binyamin Dissen <[EMAIL PROTECTED]> http://www.dissensoftware.com Director, Dissen Software, Bar & Grill - Israel Should you use the mailblocks package and expect a response from me, you should preauthorize the dissensoftware.com domain. I very rarely bother responding to challenge/response systems, especially those from irresponsible companies. ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
