2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (C) 2013-2014 Vincenzo Maffione
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
36 #elif defined (_WIN32)
38 #else /* __FreeBSD__ */
39 #include <sys/param.h>
41 #include <sys/mutex.h>
42 #include <sys/systm.h>
44 #endif /* __FreeBSD__ */
46 #include "netmap_mbq.h"
49 static inline void __mbq_init(struct mbq *q)
51 q->head = q->tail = NULL;
56 void mbq_safe_init(struct mbq *q)
58 mtx_init(&q->lock, "mbq", NULL, MTX_SPIN);
63 void mbq_init(struct mbq *q)
69 static inline void __mbq_enqueue(struct mbq *q, struct mbuf *m)
73 q->tail->m_nextpkt = m;
76 q->head = q->tail = m;
82 void mbq_safe_enqueue(struct mbq *q, struct mbuf *m)
90 void mbq_enqueue(struct mbq *q, struct mbuf *m)
96 static inline struct mbuf *__mbq_dequeue(struct mbq *q)
98 struct mbuf *ret = NULL;
102 q->head = ret->m_nextpkt;
103 if (q->head == NULL) {
107 ret->m_nextpkt = NULL;
114 struct mbuf *mbq_safe_dequeue(struct mbq *q)
119 ret = __mbq_dequeue(q);
126 struct mbuf *mbq_dequeue(struct mbq *q)
128 return __mbq_dequeue(q);
132 /* XXX seems pointless to have a generic purge */
133 static void __mbq_purge(struct mbq *q, int safe)
138 m = safe ? mbq_safe_dequeue(q) : mbq_dequeue(q);
148 void mbq_purge(struct mbq *q)
154 void mbq_safe_purge(struct mbq *q)
160 void mbq_safe_fini(struct mbq *q)
162 mtx_destroy(&q->lock);
166 void mbq_fini(struct mbq *q)