On 19/10/17 14:04, Sebastian Huber wrote: > On 19/10/17 14:18, Andrew Haley wrote: >> On 19/10/17 13:10, Jonathan Wakely wrote: >>> There are no atomic operations on atomic objects here, so the fence >>> doesn't synchronize with anything. >> Really? This seems rather unhelpful, to say the least. >> >> An atomic release operation X in thread A synchronizes-with an acquire >> fence F in thread B, if >> >> there exists an atomic read Y (with any memory order) >> Y reads the value written by X (or by the release sequence headed by X) >> Y is sequenced-before F in thread B >> >> In this case, all non-atomic and relaxed atomic stores that >> happen-before X in thread A will be synchronized-with all non-atomic >> and relaxed atomic loads from the same locations made in thread B >> after F. > > Where is the acquire fence or a load in the example?
In another thread. :-) -- Andrew Haley Java Platform Lead Engineer Red Hat UK Ltd. <https://www.redhat.com> EAC8 43EB D3EF DB98 CC77 2FAD A5CD 6035 332F A671
