Hi All, I'm playing around with implementing a wait-free channel in the runtime package, and as part of this, it'd be really nice to have double-word compare-and-swap (CAS). Barring that, however, for my purposes, it would actually be fine to have a one-word value that encodes both a pointer and some extra information using bit packing. The problem, though, is that if I store this value as, for example, a uintptr, the GC may not realize that it's a pointer. So my question is: are there any bits in a pointer which, when modified, won't mess with the GC? Note that since this is implemented in the runtime, I'm totally OK with relying on behavior specific to the current GC implementation.
Thanks! Cheers, Josh -- You received this message because you are subscribed to the Google Groups "golang-nuts" group. To unsubscribe from this group and stop receiving emails from it, send an email to golang-nuts+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
