A fast lock-free queue for C++
moodycamel.com
moodycamel.com
One question though: Why not use the C++11 atomics with the memory order definitions given in atomic. This should give you full platform support even if its not implemented in your atomicops.h
Folly, for example, makes pretty much use of these implementations.
The only reason I didn't use std::atomic was because MSVC2010 doesn't support it, and I wanted it to work in MSVC2010 (2012 adds std::atomic support though, if I remember correctly).
I agree that having a bunch of messy preprocessor-soup implementations of atomic primitives is really ugly and not very cross-platform friendly -- in the future I think I'll just stick to std::atomic.
atomicops.h does use std::atomic for all compilers except MSVC2010 and ICC13 (which only has partial std::atomic support).