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
}

func netpollarm(pd *pollDesc, mode int) {
}

func netpollBreak() {
}

func netpoll(delay int64) (gList, int32) {
	return gList{}, 0

	tp := taggedPointerPack(unsafe.Pointer(pd), pd.fdseq.Load())
	*(*taggedPointer)(unsafe.Pointer(&ev.Data)) = tp
	return syscall.EpollCtl(epfd, syscall.EPOLL_CTL_ADD, int32(fd), &ev)
}

func netpollclose(fd uintptr) uintptr {
	var ev syscall.EpollEvent
	return syscall.EpollCtl(epfd, syscall.EPOLL_CTL_DEL, int32(fd), &ev)
}

func netpollarm(pd *pollDesc, mode int) {
	throw("runtime: unused")
}

	// as mtxset protects us from stale pollDescs.

	pd.user = uint32(len(pfds))
	pfds = append(pfds, pollfd{fd: int32(fd)})
	pds = append(pds, pd)
	unlock(&mtxset)
	return 0
}

func netpollclose(fd uintptr) int32 {
	lock(&mtxpoll)
	netpollwakeup()

	lock(&mtxset)
	unlock(&mtxpoll)

	for i := 0; i < len(pfds); i++ {
		if pfds[i].fd == int32(fd) {
			pfds[i] = pfds[len(pfds)-1]

		ev[0].udata = (*byte)(unsafe.Pointer(uintptr(tp)))
	}
	ev[1] = ev[0]
	ev[1].filter = _EVFILT_WRITE
	n := kevent(kq, &ev[0], 2, nil, 0, nil)
	if n < 0 {
		return -n
	}
	return 0
}

func netpollclose(fd uintptr) int32 {
	// Don't need to unregister because calling close()
	// on fd will remove any kevents that reference the descriptor.
	return 0
}

func netpollarm(pd *pollDesc, mode int) {

		ridx = to
	} else if widx == from {
		widx = to
	}
	pd.user = uint32(ridx)<<16 | uint32(widx)
	if to != disarmed {
		subs[to], subs[from] = subs[from], subs[to]
	}
}

func netpollclose(fd uintptr) int32 {
	lock(&mtx)
	for i := 0; i < len(pds); i++ {
		if pds[i].fd == fd {
			netpolldisarm(pds[i], 'r'+'w')
			pds[i] = pds[len(pds)-1]
			pds = pds[:len(pds)-1]
			break
		}
	}

	key := packNetpollKey(netpollSourceReady, pd)
	if stdcall4(_CreateIoCompletionPort, fd, iocphandle, key, 0) == 0 {
		return int32(getlasterror())
	}
	return 0
}

func netpollclose(fd uintptr) int32 {
	// nothing to do
	return 0
}

func netpollarm(pd *pollDesc, mode int) {
	throw("runtime: unused")
}

func netpollBreak() {

//
// func netpollopen(fd uintptr, pd *pollDesc) int32
//     Arm edge-triggered notifications for fd. The pd argument is to pass
//     back to netpollready when fd is ready. Return an errno value.
//
// func netpollclose(fd uintptr) int32
//     Disable notifications for fd. Return an errno value.
//
// func netpoll(delta int64) (gList, int32)
//     Poll the network. If delta < 0, block indefinitely. If delta == 0,

	if goarch.PtrSize != 8 {
		throw("runtime: netpollopen: unsupported pointer size")
	}
	r := port_associate(portfd, _PORT_SOURCE_FD, fd, 0, uintptr(tp))
	unlock(&pd.lock)
	return r
}

func netpollclose(fd uintptr) int32 {
	return port_dissociate(portfd, _PORT_SOURCE_FD, fd)
}

// Updates the association with a new set of interested events. After
// this call, port_getn will return one and only one event for that