On 06/19/2013 10:30 AM, Paolo Bonzini wrote: > Il 18/06/2013 19:38, Andrew Haley ha scritto: >>>> Or is Java volatile somewhere between acq_rel and seq_cst, as the last >>>> paragraph of >>>> http://www.cs.umd.edu/~pugh/java/memoryModel/jsr-133-faq.html#volatile >>>> seems to suggest? >> As far as I know, the Java semantics are acq/rel. I can't see anything >> there that suggests otherwise. If we'd wanted to know for certain we >> should have CC'd Doug lea. > > acq/rel wouldn't have a full store-load barrier between a volatile store > and a volatile load.
Ahhh, okay. I had to check the C++11 spec to see the difference. I'm so deep into the Java world that I hadn't noticed that C++11 was any different. Andrew.
