718cf2ccb9
Mainly focus on files that use BSD 2-Clause license, however the tool I was using misidentified many licenses so this was mostly a manual - error prone - task. The Software Package Data Exchange (SPDX) group provides a specification to make it easier for automated tools to detect and summarize well known opensource licenses. We are gradually adopting the specification, noting that the tags are considered only advisory and do not, in any way, superceed or replace the license texts.
169 lines
3.4 KiB
C
169 lines
3.4 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (C) 2013-2014 Vincenzo Maffione
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* $FreeBSD$
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*/
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#ifdef linux
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#include "bsd_glue.h"
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#elif defined (_WIN32)
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#include "win_glue.h"
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#else /* __FreeBSD__ */
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#include <sys/param.h>
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#include <sys/lock.h>
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#include <sys/mutex.h>
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#include <sys/systm.h>
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#include <sys/mbuf.h>
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#endif /* __FreeBSD__ */
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#include "netmap_mbq.h"
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static inline void __mbq_init(struct mbq *q)
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{
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q->head = q->tail = NULL;
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q->count = 0;
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}
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void mbq_safe_init(struct mbq *q)
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{
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mtx_init(&q->lock, "mbq", NULL, MTX_SPIN);
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__mbq_init(q);
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}
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void mbq_init(struct mbq *q)
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{
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__mbq_init(q);
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}
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static inline void __mbq_enqueue(struct mbq *q, struct mbuf *m)
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{
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m->m_nextpkt = NULL;
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if (q->tail) {
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q->tail->m_nextpkt = m;
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q->tail = m;
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} else {
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q->head = q->tail = m;
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}
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q->count++;
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}
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void mbq_safe_enqueue(struct mbq *q, struct mbuf *m)
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{
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mbq_lock(q);
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__mbq_enqueue(q, m);
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mbq_unlock(q);
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}
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void mbq_enqueue(struct mbq *q, struct mbuf *m)
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{
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__mbq_enqueue(q, m);
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}
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static inline struct mbuf *__mbq_dequeue(struct mbq *q)
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{
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struct mbuf *ret = NULL;
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if (q->head) {
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ret = q->head;
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q->head = ret->m_nextpkt;
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if (q->head == NULL) {
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q->tail = NULL;
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}
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q->count--;
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ret->m_nextpkt = NULL;
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}
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return ret;
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}
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struct mbuf *mbq_safe_dequeue(struct mbq *q)
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{
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struct mbuf *ret;
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mbq_lock(q);
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ret = __mbq_dequeue(q);
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mbq_unlock(q);
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return ret;
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}
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struct mbuf *mbq_dequeue(struct mbq *q)
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{
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return __mbq_dequeue(q);
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}
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/* XXX seems pointless to have a generic purge */
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static void __mbq_purge(struct mbq *q, int safe)
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{
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struct mbuf *m;
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for (;;) {
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m = safe ? mbq_safe_dequeue(q) : mbq_dequeue(q);
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if (m) {
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m_freem(m);
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} else {
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break;
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}
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}
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}
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void mbq_purge(struct mbq *q)
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{
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__mbq_purge(q, 0);
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}
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void mbq_safe_purge(struct mbq *q)
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{
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__mbq_purge(q, 1);
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}
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void mbq_safe_fini(struct mbq *q)
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{
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mtx_destroy(&q->lock);
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}
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void mbq_fini(struct mbq *q)
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{
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}
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