On Mar 8, 2007, at 14:21 , David Roundy wrote:
I'm thinking you're missing the point. The point is to copy without writing, and that requires some knowledge (whether static or runtime) of whether anyone else has a reference to my data--which copy-on-write won't give me.
Actually, I was thinking this sounded a lot like DiffArrays. You don't actually get a guarantee that anything else isn't holding a reference, but you do get destructive update with any old references being quietly changed to diffs against the head. -- brandon s. allbery [linux,solaris,freebsd,perl] allbery@kf8nh.com system administrator [openafs,heimdal,too many hats] allbery@ece.cmu.edu electrical and computer engineering, carnegie mellon university KF8NH