[zeromq-dev] GCC Atomic Builtins (was Re: zmq on n900)

[Martin Sustrik]

Martin Lucina wrote:

> At the moment we do 1), 2) and 4).  Adding 3) is going to be a fair amount
> of hairy preprocessor and autoconf work and lots of testing to make sure
> that the combinations all work as expected.  So I'm posting this to make
> sure the information we need to make it work doesn't get lost, but I don't
> expect to be working on this anytime soon.
> 
> If someone wishes to step up and produce a patch for review that will
> satisfy all of the above, you're welcome to :-)

If we want to move any further with atomic ops, we should clearly 
separate atomic ops themselves and memory barriers (not the case atm) 
and test it on a platform with memory model as loose as possible 
(IA64/Linux?)

If there's a CS student on a list looking for thesis topic, making all 
the lock-free algorithms as efficient as possible (minimal number of 
memory barriers) with different memory models may be an interesting 
possibility.

Martin