}
		return len(p), nil
	}
}

// WriteTo wraps the sendto network call.
func (fd *FD) WriteTo(p []byte, sa syscall.Sockaddr) (int, error) {
	if err := fd.writeLock(); err != nil {
		return 0, err
	}
	defer fd.writeUnlock()
	if err := fd.pd.prepareWrite(fd.isFile); err != nil {
		return 0, err
	}
	for {
		err := syscall.Sendto(fd.Sysfd, p, 0, sa)
		if err == syscall.EINTR {
			continue
		}

	defer close(inQ)

	wg.Add(1)
	go func() {
		defer wg.Done()
		defer close(outQ)
		var q []func()
		for {
			var sendTo chan func()
			var send func()
			if len(q) > 0 {
				sendTo = outQ
				send = q[0]
			}
			select {
			case sendTo <- send:
				q = q[1:]
			case f, ok := <-inQ:
				if !ok {
					return
				}
				q = append(q, f)
			case <-done:
				return

	}
	return
}

func libc_recvfrom_trampoline()

//go:cgo_import_dynamic libc_recvfrom recvfrom "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
	var _p0 unsafe.Pointer
	if len(buf) > 0 {
		_p0 = unsafe.Pointer(&buf[0])
	} else {
		_p0 = unsafe.Pointer(&_zero)
	}

//sys	getsockname(fd int, rsa *RawSockaddrAny, addrlen *_Socklen) (err error)
//sys	recvfrom(fd int, p []byte, flags int, from *RawSockaddrAny, fromlen *_Socklen) (n int, err error)
//sys	sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error)
//sys	Shutdown(s int, how int) (err error)

// In order to use msghdr structure with Control, Controllen in golang.org/x/net,

//go:cgo_import_dynamic libc_getpeername getpeername "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_getsockname getsockname "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_recvfrom recvfrom "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_sendto sendto "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_Shutdown shutdown "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_nrecvmsg nrecvmsg "libc.a/shr_64.o"
//go:cgo_import_dynamic libc_nsendmsg nsendmsg "libc.a/shr_64.o"

	}
	return
}

func libc_recvfrom_trampoline()

//go:cgo_import_dynamic libc_recvfrom recvfrom "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
	var _p0 unsafe.Pointer
	if len(buf) > 0 {
		_p0 = unsafe.Pointer(&buf[0])
	} else {
		_p0 = unsafe.Pointer(&_zero)
	}

	}
	return
}

func libc_recvfrom_trampoline()

//go:cgo_import_dynamic libc_recvfrom recvfrom "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
	var _p0 unsafe.Pointer
	if len(buf) > 0 {
		_p0 = unsafe.Pointer(&buf[0])
	} else {
		_p0 = unsafe.Pointer(&_zero)
	}

	}
	return
}

func libc_recvfrom_trampoline()

//go:cgo_import_dynamic libc_recvfrom recvfrom "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
	var _p0 unsafe.Pointer
	if len(buf) > 0 {
		_p0 = unsafe.Pointer(&buf[0])
	} else {
		_p0 = unsafe.Pointer(&_zero)
	}

	}
	return
}

func libc_recvfrom_trampoline()

//go:cgo_import_dynamic libc_recvfrom recvfrom "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
	var _p0 unsafe.Pointer
	if len(buf) > 0 {
		_p0 = unsafe.Pointer(&buf[0])
	} else {
		_p0 = unsafe.Pointer(&_zero)
	}

	}
	return
}

func libc_recvfrom_trampoline()

//go:cgo_import_dynamic libc_recvfrom recvfrom "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func sendto(s int, buf []byte, flags int, to unsafe.Pointer, addrlen _Socklen) (err error) {
	var _p0 unsafe.Pointer
	if len(buf) > 0 {
		_p0 = unsafe.Pointer(&buf[0])
	} else {
		_p0 = unsafe.Pointer(&_zero)
	}