On Tue, Jun 6, 2017 at 2:24 PM, Andres Freund <and...@anarazel.de> wrote: > Don't think it's actually clear that errno is an integer - might very > well be just a sig_atomic_t, which can contain values up to like 127 or > so. I think the bigger point Tom was making is that we actually know > an int4 is safe - otherwise we'd have crashed and burned a long time ago > - but that that might be different for *smaller* datatypes because > $platform doesn't really do smaller writes atomically (turning them into > read-or-write operations either in microcode or assembly).
Oh, right, I remember hearing about that issue before, but it had slipped my mind completely. > Alpha, > s390, pa-risc appear to have such behaviour cross-cpu - although that > doesn't necessarily imply the same is true for handlers as well. Hmm, OK. We've already decided Alpha is safely dead, but s390 and pa-risc are ostensibly not dead. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company -- Sent via pgsql-hackers mailing list (email@example.com) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers