}
	return false
}

func drainWakeupEvent(kq int32) {
	ev := keventt{
		ident:  kqIdent,
		filter: _EVFILT_USER,
		flags:  _EV_DISABLE,
	}
	kevent(kq, &ev, 1, nil, 0, nil)
}

func netpollIsPollDescriptor(fd uintptr) bool {
	return fd == uintptr(kq)

// Fake network poller for js/wasm.
// Should never be used, because js/wasm network connections do not honor "SetNonblock".

//go:build js && wasm

package runtime

func netpollinit() {
}

func netpollIsPollDescriptor(fd uintptr) bool {
	return false
}

func netpollopen(fd uintptr, pd *pollDesc) int32 {
	return 0
}

func netpollclose(fd uintptr) int32 {
	return 0
}

	}
	return false
}

func drainWakeupEvent(_ int32) {
	var buf [16]byte
	read(int32(netpollBreakRd), noescape(unsafe.Pointer(&buf[0])), int32(len(buf)))
}

func netpollIsPollDescriptor(fd uintptr) bool {
	return fd == uintptr(kq) || fd == netpollBreakRd || fd == netpollBreakWr

	if errno != 0 {
		println("runtime: epollctl failed with", errno)
		throw("runtime: epollctl failed")
	}
	netpollEventFd = uintptr(efd)
}

func netpollIsPollDescriptor(fd uintptr) bool {
	return fd == uintptr(epfd) || fd == netpollEventFd
}

func netpollopen(fd uintptr, pd *pollDesc) uintptr {
	var ev syscall.EpollEvent

	pfds = make([]pollfd, 1, 128)

	// Poll the read side of the pipe.
	pfds[0].fd = rdwake
	pfds[0].events = _POLLIN

	pds = make([]*pollDesc, 1, 128)
	pds[0] = nil
}

func netpollIsPollDescriptor(fd uintptr) bool {
	return fd == uintptr(rdwake) || fd == uintptr(wrwake)
}

// netpollwakeup writes on wrwake to wakeup poll before any changes.
func netpollwakeup() {
	if pendingUpdates == 0 {

	timeout := &subs[0]
	eventtype := timeout.u.eventtype()
	*eventtype = eventtypeClock
	clock := timeout.u.subscriptionClock()
	clock.id = clockMonotonic
	clock.precision = 1e3
}

func netpollIsPollDescriptor(fd uintptr) bool {
	return false
}

func netpollopen(fd uintptr, pd *pollDesc) int32 {
	lock(&mtx)

	// We don't worry about pd.fdseq here,
	// as mtx protects us from stale pollDescs.

	if iocphandle == 0 {
		println("runtime: CreateIoCompletionPort failed (errno=", getlasterror(), ")")
		throw("runtime: netpollinit failed")
	}
}

func netpollIsPollDescriptor(fd uintptr) bool {
	return fd == iocphandle
}

func netpollopen(fd uintptr, pd *pollDesc) int32 {
	key := packNetpollKey(netpollSourceReady, pd)