sockcmsg_dragonfly.go 544 B

12345678910111213141516
  1. // Copyright 2019 The Go Authors. All rights reserved.
  2. // Use of this source code is governed by a BSD-style
  3. // license that can be found in the LICENSE file.
  4. package unix
  5. // Round the length of a raw sockaddr up to align it properly.
  6. func cmsgAlignOf(salen int) int {
  7. salign := SizeofPtr
  8. if SizeofPtr == 8 && !supportsABI(_dragonflyABIChangeVersion) {
  9. // 64-bit Dragonfly before the September 2019 ABI changes still requires
  10. // 32-bit aligned access to network subsystem.
  11. salign = 4
  12. }
  13. return (salen + salign - 1) & ^(salign - 1)
  14. }