.\" Copyright (c) 1993 John Brezak
.\" All rights reserved.
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.\"	$NetBSD: insque.3,v 1.11 2003/04/16 13:34:59 wiz Exp $
.\"
.Dd August 12, 1993
.Dt INSQUE 3
.Sh NAME
.Nm insque ,
.Nm remque
.Nd insert/remove element from a queue
.Sh LIBRARY
.Lb libcompat
.Sh SYNOPSIS
.In search.h
.Ft struct qelem {
.br
.Ft 	struct qelem *q_forw;
.br
.Ft 	struct qelem *q_back;
.br
.Ft 	char q_data[];
.br
.Ft };
.br
.br
.Ft void
.Fn insque "struct qelem *elem" "struct qelem *pred"
.Ft void
.Fn remque "struct qelem *elem"
.Sh DESCRIPTION
.Bf -symbolic
These interfaces are available from the compatibility library, libcompat.
.Ef
.Pp
.Fn insque
and
.Fn remque
manipulate queues built from doubly linked lists.
Each element in the queue must begin with a "struct qelem".
.Sh DIAGNOSTICS
These functions are not atomic unless that machine architecture allows it.
.Sh HISTORY
These are derived from the insque and remque instructions on a VAX.