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 unix

     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 }