// or the context is canceled, at which point the returned channel is closed.
func _Merge[Elem any](ctx context.Context, c1, c2 <-chan Elem) <-chan Elem {
	r := make(chan Elem)
	go func(ctx context.Context, c1, c2 <-chan Elem, r chan<- Elem) {
		defer close(r)
		for c1 != nil || c2 != nil {
			select {
			case <-ctx.Done():
				return
			case v1, ok := <-c1:
				if ok {
					r <- v1

-t table -N chain
-t table -A chain -f foo -b bar
-t table -I chain 2 -f foo -b bar

-t table -N chain
-t table -A chain -f foo -b bar
-t table -I chain 2 -f foo -b bar
-t table -A chain -f foo -b baz

* table
-N chain
-A chain -f foo -b bar
-I chain 2 -f foo -b bar
-I chain 1 -f foo -b bar

* nat
-A PREROUTING -f foo -b bar
COMMIT
* table
-N chain
-A chain -f foo -b bar
-I chain 2 -f foo -b bar
-A chain -f foo -b baz

Austin Clements <******@****.***> 1683216807 -0400

Jacek Ewertowski <******@****.***> 1666353045 +0200

Oliver Liu <******@****.***> 1523299220 -0700

Tao Li <******@****.***> 1518720412 -0800

		randx -= 1000000
	}
	return randx % n
}

type Chan struct {
	sc, rc chan int // send and recv chan
	sv, rv int      // send and recv seq
}

var (
	nproc      int
	nprocLock  sync.Mutex
	cval       int
	end        int = 10000
	totr, tots int
	totLock    sync.Mutex
	nc         *Chan
)

func init() {
	nc = new(Chan)
}

func changeNproc(adjust int) int {
	nprocLock.Lock()