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Filename : sockcmsg_dragonfly.go

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// Copyright 2019 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.

package syscall

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