NAME

insque, remque —

doubly-linked list management

LIBRARY

Standard C Library (libc, -lc)

SYNOPSIS

#include <search.h>

void
insque(void *element1, void *pred);

void
remque(void *element);

DESCRIPTION

The insque() and remque() functions encapsulate the ever-repeating task of doing insertion and 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 insque() function also allows the pred argument to be a NULL pointer for the initialization of a new list's head element.

STANDARDS

The insque() and remque() functions conform to IEEE Std 1003.1-2001 (“POSIX.1”).

HISTORY

The insque() and remque() functions appeared in 4.2BSD. In FreeBSD 5.0, they reappeared conforming to IEEE Std 1003.1-2001 (“POSIX.1”).