libgo/go/syscall/sockcmsg_dragonfly.go

   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
   5 package syscall
   6
   7 // Round the length of a raw sockaddr up to align it properly.
   8 func cmsgAlignOf(salen int) int {
   9         salign := sizeofPtr
  10         if sizeofPtr == 8 && !supportsABI(_dragonflyABIChangeVersion) {
  11                 // 64-bit Dragonfly before the September 2019 ABI changes still requires
  12                 // 32-bit aligned access to network subsystem.
  13                 salign = 4
  14         }
  15         return (salen + salign - 1) & ^(salign - 1)
  16 }