// We singly-linked up the SudoGs in lock order.
	casi = -1
	cas = nil
	caseSuccess = false
	sglist = gp.waiting
	// Clear all elem before unlinking from gp.waiting.
	for sg1 := gp.waiting; sg1 != nil; sg1 = sg1.waitlink {
		sg1.isSelect = false
		sg1.elem = nil
		sg1.c = nil
	}
	gp.waiting = nil

	for _, casei := range lockorder {
		k = &scases[casei]
		if k.c.timer != nil {
			unblockTimerChan(k.c)

				t.next = nil
				t.waittail = nil
			} else {
				// Add s to end of t's wait list.
				if t.waittail == nil {
					t.waitlink = s
				} else {
					t.waittail.waitlink = s
				}
				t.waittail = s
				s.waitlink = nil
				if t.waiters+1 != 0 {
					t.waiters++
				}
			}
			return
		}
		last = t
		if uintptr(unsafe.Pointer(addr)) < uintptr(t.elem) {
			pt = &t.prev
		} else {

	// might be in the stack.
	for s := gp.waiting; s != nil; s = s.waitlink {
		adjustpointer(adjinfo, unsafe.Pointer(&s.elem))
	}
}

func fillstack(stk stack, b byte) {
	for p := stk.lo; p < stk.hi; p++ {
		*(*byte)(unsafe.Pointer(p)) = b
	}
}

func findsghi(gp *g, stk stack) uintptr {
	var sghi uintptr
	for sg := gp.waiting; sg != nil; sg = sg.waitlink {
		p := uintptr(sg.elem) + uintptr(sg.c.elemsize)

	mysg.releasetime = 0
	if t0 != 0 {
		mysg.releasetime = -1
	}
	// No stack splits between assigning elem and enqueuing mysg
	// on gp.waiting where copystack can find it.
	mysg.elem = ep
	mysg.waitlink = nil
	mysg.g = gp
	mysg.isSelect = false
	mysg.c = c
	gp.waiting = mysg
	gp.param = nil
	c.sendq.enqueue(mysg)
	// Signal to anyone trying to shrink our stack that we're about

	success bool

	// waiters is a count of semaRoot waiting list other than head of list,
	// clamped to a uint16 to fit in unused space.
	// Only meaningful at the head of the list.
	// (If we wanted to be overly clever, we could store a high 16 bits
	// in the second entry in the list.)
	waiters uint16

	parent   *sudog // semaRoot binary tree
	waitlink *sudog // g.waiting list or semaRoot
	waittail *sudog // semaRoot

	}
	if s.next != nil {
		throw("runtime: sudog with non-nil next")
	}
	if s.prev != nil {
		throw("runtime: sudog with non-nil prev")
	}
	if s.waitlink != nil {
		throw("runtime: sudog with non-nil waitlink")
	}
	if s.c != nil {
		throw("runtime: sudog with non-nil c")
	}
	gp := getg()
	if gp.param != nil {
		throw("runtime: releaseSudog with non-nil gp.param")
	}

	// No need to wait run at full speed.
	if maxIO <= 0 {
		return
	}

	const waitTick = 100 * time.Millisecond

	tmpMaxWait := maxWait

	for currentIO() >= maxIO {
		if tmpMaxWait > 0 {
			if tmpMaxWait < waitTick {
				time.Sleep(tmpMaxWait)
				return
			}
			time.Sleep(waitTick)
			tmpMaxWait -= waitTick
		}
		if tmpMaxWait <= 0 {
			return
		}
	}
}

func currentHTTPIO() int {

}

// conditionalProgressRequester will request progress notification if there
// is a request waiting for watch cache to be fresh.
type conditionalProgressRequester struct {
	clock                TickerFactory
	requestWatchProgress WatchProgressRequester
	contextMetadata      metadata.MD

	mux     sync.Mutex
	cond    *sync.Cond
	waiting int
	stopped bool
}

func (pr *conditionalProgressRequester) Run(stopCh <-chan struct{}) {

        e.causes.message == [
            'Failed to handle GET /a due to a timeout waiting to be released. Waiting for 0 further requests, received [GET /a, GET /b], released [], not yet received [GET /c]',
            'Failed to handle GET /b due to a timeout waiting to be released. Waiting for 0 further requests, received [GET /a, GET /b], released [], not yet received [GET /c]'
        ]
    }

// copies of this function.
func TestStartLineAsm(t *testing.T) {
	startlinetest.CallerStartLine = callerStartLine

	const wantLine = 23
	got := startlinetest.AsmFunc()
	if got != wantLine {
		t.Errorf("start line got %d want %d", got, wantLine)
	}