2 * Copyright (C) 2013-2014 Vincenzo Maffione
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #elif defined (_WIN32)
36 #else /* __FreeBSD__ */
37 #include <sys/param.h>
39 #include <sys/mutex.h>
40 #include <sys/systm.h>
42 #endif /* __FreeBSD__ */
44 #include "netmap_mbq.h"
47 static inline void __mbq_init(struct mbq *q)
49 q->head = q->tail = NULL;
54 void mbq_safe_init(struct mbq *q)
56 mtx_init(&q->lock, "mbq", NULL, MTX_SPIN);
61 void mbq_init(struct mbq *q)
67 static inline void __mbq_enqueue(struct mbq *q, struct mbuf *m)
71 q->tail->m_nextpkt = m;
74 q->head = q->tail = m;
80 void mbq_safe_enqueue(struct mbq *q, struct mbuf *m)
88 void mbq_enqueue(struct mbq *q, struct mbuf *m)
94 static inline struct mbuf *__mbq_dequeue(struct mbq *q)
96 struct mbuf *ret = NULL;
100 q->head = ret->m_nextpkt;
101 if (q->head == NULL) {
105 ret->m_nextpkt = NULL;
112 struct mbuf *mbq_safe_dequeue(struct mbq *q)
117 ret = __mbq_dequeue(q);
124 struct mbuf *mbq_dequeue(struct mbq *q)
126 return __mbq_dequeue(q);
130 /* XXX seems pointless to have a generic purge */
131 static void __mbq_purge(struct mbq *q, int safe)
136 m = safe ? mbq_safe_dequeue(q) : mbq_dequeue(q);
146 void mbq_purge(struct mbq *q)
152 void mbq_safe_purge(struct mbq *q)
158 void mbq_safe_fini(struct mbq *q)
160 mtx_destroy(&q->lock);
164 void mbq_fini(struct mbq *q)