tree a14c4a255a147b48825d0fa29519d9cb7b91869a
parent a51885621d5bf8fa63a82e8beb8438841098251f
author Olivier Houchard <ohouchard@haproxy.com> 1551980700 +0100
committer Olivier Houchard <cognet@ci0.org> 1552320157 +0100

MINOR: threads: Implement __ha_barrier_atomic*.

Implement __ha_barrier functions to be used when trying to protect data
modified by atomic operations (except when using HA_ATOMIC_STORE).
On intel, atomic operations either use the LOCK prefix and xchg, and both
atc as full barrier, so there's no need to add an extra barrier.