freebsd-skq/lib/libc/stdlib/insque.3

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.\"
.\" Initial implementation:
.\" Copyright (c) 2002 Robert Drehmel
.\" All rights reserved.
.\"
.\" As long as the above copyright statement and this notice remain
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.\" unchanged, you can do what ever you want with this file.
.\"
.\" $FreeBSD$
.\"
.Dd October 10, 2002
.Dt INSQUE 3
.Os
.Sh NAME
.Nm insque ,
.Nm remque
.Nd doubly-linked list management
.Sh LIBRARY
.Lb libc
.Sh SYNOPSIS
.In search.h
.Ft void
.Fn insque "void *element1" "void *pred"
.Ft void
.Fn remque "void *element"
.Sh DESCRIPTION
The
.Fn insque
and
.Fn remque
functions encapsulate the ever-repeating task of doing insertion and
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removal operations on doubly linked lists.
The functions expect their
arguments to point to a structure whose first and second members are
pointers to the next and previous element, respectively.
The
.Fn insque
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function also allows the
.Fa pred
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argument to be a
.Dv NULL
pointer for the initialization of a new list's
head element.
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.Sh STANDARDS
The
.Fn insque
and
.Fn remque
functions conform to
.St -p1003.1-2001 .
.Sh HISTORY
The
.Fn insque
and
.Fn remque
functions appeared in
.Bx 4.2 .
In
.Fx 5.0 ,
they reappeared conforming to
.St -p1003.1-2001 .