Hi, On 2016-05-27 11:00:42 -0400, John Gorman wrote: > Someone recently told me that the postgresql atomics library was incomplete > for 64 bit operations such as pg_atomic_fetch_add_u64() and should not be > used.
There's currently no fallback for 32bit platforms without 64bit atomics support. I posted a patch adding that fallback, which I plan to commit soon after the start of the 9.7 development window opens. > Can someone definitively confirm whether it is okay to rely on the 64 > bit atomics or whether it is better to protect 64 bit operations with > a spinlock? For current versions 64bit atomics are working, but you'll get compilation errors if the platform doesn't have 64bit atomics support. That's not actually many CPUs these days; most prominent are probably older arm CPUs. Andres -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
