mirror of
https://github.com/Stichting-MINIX-Research-Foundation/netbsd.git
synced 2025-08-13 16:09:46 -04:00
62 lines
2.4 KiB
C
62 lines
2.4 KiB
C
/* $NetBSD: kfifo.h,v 1.1 2014/07/16 20:56:25 riastradh Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 2014 The NetBSD Foundation, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to The NetBSD Foundation
|
|
* by Taylor R. Campbell.
|
|
*
|
|
* 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.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 THE FOUNDATION OR CONTRIBUTORS
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef _LINUX_KFIFO_H_
|
|
#define _LINUX_KFIFO_H_
|
|
|
|
#include <sys/pcq.h>
|
|
|
|
#define DECLARE_KFIFO_PTR(fifo, type) \
|
|
struct { \
|
|
pcq_t *pcq; \
|
|
type *dummy; \
|
|
} fifo
|
|
|
|
#define kfifo_put(fifo, item) \
|
|
pcq_put((fifo)->pcq, __UNCONST((const char *)(item) + \
|
|
0*sizeof((item) == *(fifo)->dummy)))
|
|
#define kfifo_get(fifo, itemp) \
|
|
((*((itemp) + 0*sizeof((itemp) - (fifo)->dummy)) = \
|
|
pcq_get((fifo)->pcq)) != NULL)
|
|
|
|
#define kfifo_is_empty(fifo) \
|
|
(pcq_peek((fifo)->pcq) == NULL)
|
|
|
|
#define kfifo_alloc(fifo, size, gfp) \
|
|
(((fifo)->pcq = pcq_create((size), \
|
|
ISSET((gfp), __GFP_WAIT)? KM_SLEEP : KM_NOSLEEP)) \
|
|
== NULL? -ENOMEM : 0)
|
|
|
|
#define kfifo_free(fifo) \
|
|
pcq_destroy((fifo)->pcq)
|
|
|
|
#endif /* _LINUX_KFIFO_H_ */
|