freebsd-dev/sys/dev/usb/queue.addendum.h
1998-12-14 09:31:41 +00:00

65 lines
2.7 KiB
C

/* FreeBSD $Id$ */
/*
* Copyright (c) 1997, 1998
* Nick Hibma <n_hibma@freebsd.org>. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Bill Paul.
* 4. Neither the name of the author nor the names of any co-contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY NICK HIBMA AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*
*/
/* These definitions are taken from the NetBSD /sys/sys/queue.h file
* The copyright as in /sys/sys/queue.h from FreeBSD applies (they are the same)
*/
/* This was called SIMPLEQ
*/
#ifndef STAILQ_HEAD_INITIALIZER
#define STAILQ_HEAD_INITIALIZER(head) \
{ NULL, &(head).stqh_first }
#endif
/* This one was called SIMPLEQ_REMOVE_HEAD but removes not only the
* head element, but a whole queue of elements from the head.
*/
#ifndef STAILQ_REMOVE_HEAD_QUEUE
#define STAILQ_REMOVE_HEAD_QUEUE(head, elm, field) do { \
if (((head)->stqh_first = (elm)->field.stqe_next) == NULL) \
(head)->stqh_last = &(head)->stqh_first; \
} while (0)
#endif
/* This is called LIST and was called like that as well in the NetBSD version
*/
#ifndef LIST_HEAD_INITIALIZER
#define LIST_HEAD_INITIALIZER(head) \
{ NULL }
#endif