NetBSD/lib/libcompat/4.3/insque.3

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.\" Copyright (c) 1993 John Brezak
.\" All rights reserved.
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.\" $Id: insque.3,v 1.3 1994/03/12 01:28:56 jtc Exp $
.\"
.Dd August 12, 1993
.Dt INSQUE 3
.Sh NAME
.Nm insque ,
.Nm remque
.Nd insert/remove element from a queue
.Sh SYNOPSIS
.Fd #include <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
.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.