Dennis Lee Bieber wrote: > On Sat, 22 Jul 2006 17:19:22 +1200, Lawrence D'Oliveiro > <[EMAIL PROTECTED]> declaimed the following in > comp.lang.python: > >> >> Perhaps because with threads, data is shared by default. Whereas with >> processes, it is private by default, and needs to be explicitly shared if >> you want that. > > Or just that the "name" "thread" was a late-comer for some of us... > > The Amiga had "tasks" at the lowest level (these were what the core > OS library managed -- that core handled task switching, memory > allocation, and IPC [event flags, message ports]). "Processes" were > scheduled by the executive, but had additional data -- like stdin/stdout > and environment variables... all the stuff one could access from a > command line. Or, confusing for many... Processes were "DOS" level, > Tasks were "OS" level.
On the Amiga, everything was essentially a "thread". There was *no* memory protection whatsoever, which made for a wickedly fast -- and unstable -- OS. Now, before Commordore went the way of the Dodo Bird, there was some discussion about adding memory protection to the OS, but that was a very difficult proposition since most if not all of the OS control structures were just that -- basically c "structs", with live memory pointers handed around from application to kernel and back. I think we could've done it eventually, but that ship sank. All because of the idiots there that was upper management. But I digress. -- -- Edmond Dantes, CMC And Now for something Completely Different: http://baskets.giftsantiquescollectables.com http://vacation-packages.YouDeserveItNow.com http://cold-remedy.WomenLite.com http://investments.BankOrLoan.com http://coils.IndustrialMetalz.com http://brackets.Auto1Parts.com http://windmill.industrialtips.com Posted Via Usenet.com Premium Usenet Newsgroup Services ---------------------------------------------------------- ** SPEED ** RETENTION ** COMPLETION ** ANONYMITY ** ---------------------------------------------------------- http://www.usenet.com -- http://mail.python.org/mailman/listinfo/python-list
