On 04/05/2013 12:39 PM, Bjorn Lindgren wrote: > I would like to know if the built-in __atomic_* function calls are always > garanteed to succeed? If for example multiple threads on different > sockets/cores call the __atomic function on a globaly shared variable at > same time, are the calls then queued and executed? I can't tell exactly what this question means. I think you're asking if, for example, an atomic_fetch-and-modify might fail to modify its target. The answer is no: while the cmpxchg fails it will retry. Andrew.
