func sync/atomic.SwapInt64

3 uses

	sync/atomic (current package)
		doc.go#L71: func SwapInt64(addr *int64, new int64) (old int64)
		type.go#L104: func (x *Int64) Swap(new int64) (old int64) { return SwapInt64(&x.v, new) }

	go.uber.org/atomic
		int64.go#L87: 	return atomic.SwapInt64(&i.v, val)