func sync/atomic.SwapUint64

2 uses

	sync/atomic (current package)
		doc_64.go#L21: func SwapUint64(addr *uint64, new uint64) (old uint64)
		type.go#L175: func (x *Uint64) Swap(new uint64) (old uint64) { return SwapUint64(&x.v, new) }