"non-blocking thread-safe queue in c++?" Code Answer
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assuming your cpu has a double-pointer-wide compare-and-swap (compxchg8b on 486 or higher, compxchg16b on most amd64 machines [not present on some early models by intel])... there is an algorithm here.
update: it's not hard to translate this to c++ if you aren't afraid of doing a bit of work. :p
this algorithm assumes a "pointer with tag" structure which looks like this:
then you want to wrap the instructions
lock cmpxchg{8|16}b
with some inline asm...maybe then you can write the queue node like this:
the rest is more or less a transcription of the algorithm i linked to...