Memory synchronization flag. If the supplied option is not available on the current platform then a stronger method will be used instead.
not sequenced
hoist-load barrier
hoist-store barrier
sink-load barrier
sink-store barrier
hoist-load + hoist-store barrier
sink-load + sink-store barrier
fully sequenced (acq + rel)
See Implementation
Memory synchronization flag. If the supplied option is not available on the current platform then a stronger method will be used instead.