}
	if unsafe.Offsetof(y1.y) != 1 {
		throw("bad offsetof y1.y")
	}
	if unsafe.Sizeof(y1) != 2 {
		throw("bad unsafe.Sizeof y1")
	}

	if timediv(12345*1000000000+54321, 1000000000, &e) != 12345 || e != 54321 {
		throw("bad timediv")
	}

	var z uint32
	z = 1
	if !atomic.Cas(&z, 1, 2) {
		throw("cas1")
	}
	if z != 2 {
		throw("cas2")
	}

	z = 4

	var timeout int32
	if ns >= 0 {
		// The timeout is specified in microseconds - ensure that we
		// do not end up dividing to zero, which would put us to sleep
		// indefinitely...
		timeout = timediv(ns, 1000, nil)
		if timeout == 0 {
			timeout = 1
		}
	}

	// sys_umtx_sleep will return EWOULDBLOCK (EAGAIN) when the timeout
	// expires or EBUSY if the mutex value does not match.

	// the OS clean up threads.
	throw("exitThread")
}

//go:nosplit
func semacreate(mp *m) {
}

//go:nosplit
func semasleep(ns int64) int {
	gp := getg()
	if ns >= 0 {
		ms := timediv(ns, 1000000, nil)
		if ms == 0 {
			ms = 1
		}
		ret := plan9_tsemacquire(&gp.m.waitsemacount, ms)
		if ret == 1 {
			return 0 // success
		}
		return -1 // timeout or interrupted
	}

		escapeSink = x
	}
	return x
}

// Acquirem blocks preemption.
func Acquirem() {
	acquirem()
}

func Releasem() {
	releasem(getg().m)
}

var Timediv = timediv

type PIController struct {
	piController
}

func NewPIController(kp, ti, tt, min, max float64) *PIController {
	return &PIController{piController{
		kp:  kp,
		ti:  ti,
		tt:  tt,

	)

	var result uintptr
	if ns < 0 {
		result = stdcall2(_WaitForSingleObject, getg().m.waitsema, uintptr(_INFINITE))
	} else {
		start := nanotime()
		elapsed := int64(0)
		for {
			ms := int64(timediv(ns-elapsed, 1000000, nil))
			if ms == 0 {
				ms = 1
			}
			result = stdcall4(_WaitForMultipleObjects, 2,
				uintptr(unsafe.Pointer(&[2]uintptr{getg().m.waitsema, getg().m.resumesema})),
				0, uintptr(ms))

//go:noescape
func setitimer(mode int32, new, old *itimerval)

//go:noescape
func timer_create(clockid int32, sevp *sigevent, timerid *int32) int32

//go:noescape
func timer_settime(timerid int32, flags int32, new, old *itimerspec) int32

//go:noescape
func timer_delete(timerid int32) int32

//go:noescape
func rtsigprocmask(how int32, new, old *sigset, size int32)

//go:nosplit
//go:nowritebarrierrec

	server := startAndWaitForServer(t)
	done := make(chan struct{}, 1)
	go func() {
		server.Close()
		done <- struct{}{}
	}()
	select {
	case <-done:
	case <-time.After(5 * time.Second):
		t.Fatal("Timed out waiting for listeningTestProbe to be called")
	}
}

func TestSignals(t *testing.T) {
	c := make(chan os.Signal, 1)
	signal.Notify(c, syscall.SIGUSR1)
	server := startAndWaitForServer(t)
	defer server.Close()

// func timer_create(clockid int32, sevp *sigevent, timerid *int32) int32
TEXT runtime·timer_create(SB),NOSPLIT,$0-28
	MOVW	clockid+0(FP), A0
	MOV	sevp+8(FP), A1
	MOV	timerid+16(FP), A2
	MOV	$SYS_timer_create, A7
	ECALL
	MOVW	A0, ret+24(FP)
	RET

// func timer_settime(timerid int32, flags int32, new, old *itimerspec) int32
TEXT runtime·timer_settime(SB),NOSPLIT,$0-28
	MOVW	timerid+0(FP), A0
	MOVW	flags+4(FP), A1

        outputLines[1] == "Timed out task ':block' has not yet stopped."
        outputLines[outputLines.size() - 1] == "Timed out task ':block' has stopped."

        and:
        def logging = taskLogging(":block")
        logging[0] == "Requesting stop of task ':block' as it has exceeded its configured timeout of 500ms."
        logging[1] == "Timed out task ':block' has not yet stopped."

// func timer_create(clockid int32, sevp *sigevent, timerid *int32) int32
TEXT runtime·timer_create(SB),NOSPLIT,$0-28
	MOVW	clockid+0(FP), R4
	MOVV	sevp+8(FP), R5
	MOVV	timerid+16(FP), R6
	MOVV	$SYS_timer_create, R11
	SYSCALL
	MOVW	R4, ret+24(FP)
	RET

// func timer_settime(timerid int32, flags int32, new, old *itimerspec) int32
TEXT runtime·timer_settime(SB),NOSPLIT,$0-28
	MOVW	timerid+0(FP), R4
	MOVW	flags+4(FP), R5