return int32(sysvicall4(&libc_port_alert, uintptr(port), uintptr(flags), uintptr(events), user))
}

var portfd int32 = -1

func netpollinit() {
	portfd = port_create()
	if portfd >= 0 {
		closeonexec(portfd)
		return
	}

	print("runtime: port_create failed (errno=", errno(), ")\n")
	throw("runtime: netpollinit failed")
}

func netpollIsPollDescriptor(fd uintptr) bool {

			fdflags,
			unsafe.Pointer(&fd),
		)
	}
	return int(fd), errnoErr(errno)
}

func Close(fd int) error {
	errno := fd_close(int32(fd))
	return errnoErr(errno)
}

func CloseOnExec(fd int) {
	// nothing to do - no exec
}

func Mkdir(path string, perm uint32) error {
	if path == "" {
		return EINVAL
	}
	dirFd, pathPtr, pathLen := preparePath(path)

	var fdx [2]int32
	err = socketpair(domain, typ, proto, &fdx)
	if err == nil {
		fd[0] = int(fdx[0])
		fd[1] = int(fdx[1])
	}
	return
}

var ioSync int64

func CloseOnExec(fd int) { fcntl(fd, F_SETFD, FD_CLOEXEC) }

func SetNonblock(fd int, nonblocking bool) (err error) {
	flag, err := fcntl(fd, F_GETFL, 0)
	if err != nil {
		return err
	}
	if nonblocking {

		{"Chflags", Func, 0},
		{"Chmod", Func, 0},
		{"Chown", Func, 0},
		{"Chroot", Func, 0},
		{"Clearenv", Func, 0},
		{"Close", Func, 0},
		{"CloseHandle", Func, 0},
		{"CloseOnExec", Func, 0},
		{"Closesocket", Func, 0},
		{"CmsgLen", Func, 0},
		{"CmsgSpace", Func, 0},
		{"Cmsghdr", Type, 0},
		{"Cmsghdr.Len", Field, 0},
		{"Cmsghdr.Level", Field, 0},