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