kfifo.h revision 1.1.2.2
1 1.1.2.2 tls /* $NetBSD: kfifo.h,v 1.1.2.2 2014/08/10 06:55:39 tls Exp $ */ 2 1.1.2.2 tls 3 1.1.2.2 tls /*- 4 1.1.2.2 tls * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 1.1.2.2 tls * All rights reserved. 6 1.1.2.2 tls * 7 1.1.2.2 tls * This code is derived from software contributed to The NetBSD Foundation 8 1.1.2.2 tls * by Taylor R. Campbell. 9 1.1.2.2 tls * 10 1.1.2.2 tls * Redistribution and use in source and binary forms, with or without 11 1.1.2.2 tls * modification, are permitted provided that the following conditions 12 1.1.2.2 tls * are met: 13 1.1.2.2 tls * 1. Redistributions of source code must retain the above copyright 14 1.1.2.2 tls * notice, this list of conditions and the following disclaimer. 15 1.1.2.2 tls * 2. Redistributions in binary form must reproduce the above copyright 16 1.1.2.2 tls * notice, this list of conditions and the following disclaimer in the 17 1.1.2.2 tls * documentation and/or other materials provided with the distribution. 18 1.1.2.2 tls * 19 1.1.2.2 tls * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 1.1.2.2 tls * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 1.1.2.2 tls * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 1.1.2.2 tls * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 1.1.2.2 tls * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 1.1.2.2 tls * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 1.1.2.2 tls * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 1.1.2.2 tls * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 1.1.2.2 tls * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 1.1.2.2 tls * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 1.1.2.2 tls * POSSIBILITY OF SUCH DAMAGE. 30 1.1.2.2 tls */ 31 1.1.2.2 tls 32 1.1.2.2 tls #ifndef _LINUX_KFIFO_H_ 33 1.1.2.2 tls #define _LINUX_KFIFO_H_ 34 1.1.2.2 tls 35 1.1.2.2 tls #include <sys/pcq.h> 36 1.1.2.2 tls 37 1.1.2.2 tls #define DECLARE_KFIFO_PTR(fifo, type) \ 38 1.1.2.2 tls struct { \ 39 1.1.2.2 tls pcq_t *pcq; \ 40 1.1.2.2 tls type *dummy; \ 41 1.1.2.2 tls } fifo 42 1.1.2.2 tls 43 1.1.2.2 tls #define kfifo_put(fifo, item) \ 44 1.1.2.2 tls pcq_put((fifo)->pcq, __UNCONST((const char *)(item) + \ 45 1.1.2.2 tls 0*sizeof((item) == *(fifo)->dummy))) 46 1.1.2.2 tls #define kfifo_get(fifo, itemp) \ 47 1.1.2.2 tls ((*((itemp) + 0*sizeof((itemp) - (fifo)->dummy)) = \ 48 1.1.2.2 tls pcq_get((fifo)->pcq)) != NULL) 49 1.1.2.2 tls 50 1.1.2.2 tls #define kfifo_is_empty(fifo) \ 51 1.1.2.2 tls (pcq_peek((fifo)->pcq) == NULL) 52 1.1.2.2 tls 53 1.1.2.2 tls #define kfifo_alloc(fifo, size, gfp) \ 54 1.1.2.2 tls (((fifo)->pcq = pcq_create((size), \ 55 1.1.2.2 tls ISSET((gfp), __GFP_WAIT)? KM_SLEEP : KM_NOSLEEP)) \ 56 1.1.2.2 tls == NULL? -ENOMEM : 0) 57 1.1.2.2 tls 58 1.1.2.2 tls #define kfifo_free(fifo) \ 59 1.1.2.2 tls pcq_destroy((fifo)->pcq) 60 1.1.2.2 tls 61 1.1.2.2 tls #endif /* _LINUX_KFIFO_H_ */ 62
Indexes created Thu Oct 02 14:10:14 GMT 2025