text: // Copyright 2017 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  // +build arm64 amd64 ppc64 ppc64le mips64 mips64le riscv64 s390x
  // +build linux
  
  package socket
  
  import "unsafe"
  
  func (h *msghdr) setIov(vs []iovec) {
  	l := len(vs)
  	if l == 0 {
  		return
  	}
  	h.Iov = &vs[0]
  	h.Iovlen = uint64(l)
  }
  
  func (h *msghdr) setControl(b []byte) {
  	h.Control = (*byte)(unsafe.Pointer(&b[0]))
  	h.Controllen = uint64(len(b))
  }
  