On Thu, Aug 28, 2008 at 12:15:10AM +0100, Lennart Augustsson wrote:
I didn't say NetBSD doesn't use global variables, I said the device driver model doesn't use global variables. And quite a few things that used to be in global variables have been moved into allocated variables and are being passed around instead. That's simply a better way to structure the code.
Indeed. I have experimented with single address space operating systems where it is pretty much the only way to do things at the user level. But I still want to be able to implement my kernel in haskell. :)
I don't don't think global variables should be banned, I just think they should be severly discouraged.
Oh, I certainly agree with that. especially among new programmers. I think ACIO is a particularly elegant way to provide them in haskell for when they are needed. Every time I can avoid resorting to C code for a task without sacrificing performance, aethetics, or correctness, it is a good day. John -- John Meacham - ⑆repetae.net⑆john⑈