pub struct AtomicUfat(/* private fields */);Available on 32-bit and
target_has_atomic_load_store=64, or 64-bit and target_has_atomic_load_store=128 only.pub struct AtomicUfat(/* private fields */);target_has_atomic_load_store=64, or 64-bit and target_has_atomic_load_store=128 only.