2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2016, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
6 * Empire is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 * See files README, COPYING and CREDITS in the root of the source
22 * tree for related information and legal notices. It is expected
23 * that future projects/authors will amend these files as needed.
27 * queue.h: Generic vax-like doubly linked list queues
29 * Known contributors to this file:
30 * Markus Armbruster, 2014
36 #define QEMPTY(p) ((p)->q_forw == (p))
39 struct emp_qelem *q_forw;
40 struct emp_qelem *q_back;
43 extern void emp_remque(struct emp_qelem *);
44 extern void emp_initque(struct emp_qelem *);
45 extern int emp_quelen(struct emp_qelem *);
46 extern struct emp_qelem *emp_searchque(struct emp_qelem *, void *,
47 int (*)(struct emp_qelem *, void *));
48 extern void emp_insque(struct emp_qelem *, struct emp_qelem *);