124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/**************************************************************************
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Copyright (c) 2007, Chelsio Inc.
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All rights reserved.
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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 are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Neither the name of the Chelsio Corporation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND 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 COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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$FreeBSD$
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***************************************************************************/
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#ifndef CXGB_MBUFQ_H_
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#define CXGB_MBUFQ_H_
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struct mbuf_head {
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struct mbuf *head;
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struct mbuf *tail;
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uint32_t qlen;
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uint32_t qsize;
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struct mtx lock;
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};
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static __inline void
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mbufq_init(struct mbuf_head *l)
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{
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l->head = l->tail = NULL;
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l->qlen = l->qsize = 0;
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}
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static __inline int
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mbufq_empty(struct mbuf_head *l)
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{
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return (l->head == NULL);
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}
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static __inline int
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mbufq_len(struct mbuf_head *l)
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{
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return (l->qlen);
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}
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static __inline int
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mbufq_size(struct mbuf_head *l)
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{
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return (l->qsize);
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}
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static __inline int
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mbufq_head_size(struct mbuf_head *l)
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{
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return (l->head ? l->head->m_pkthdr.len : 0);
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}
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static __inline void
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mbufq_tail(struct mbuf_head *l, struct mbuf *m)
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{
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l->qlen++;
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if (l->head == NULL)
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l->head = m;
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else
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l->tail->m_nextpkt = m;
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l->tail = m;
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l->qsize += m->m_pkthdr.len;
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}
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static __inline struct mbuf *
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mbufq_dequeue(struct mbuf_head *l)
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{
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struct mbuf *m;
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m = l->head;
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if (m) {
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if (m == l->tail)
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l->head = l->tail = NULL;
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else
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l->head = m->m_nextpkt;
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m->m_nextpkt = NULL;
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l->qlen--;
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l->qsize -= m->m_pkthdr.len;
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}
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return (m);
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}
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static __inline struct mbuf *
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mbufq_peek(struct mbuf_head *l)
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{
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return (l->head);
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}
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static __inline void
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mbufq_append(struct mbuf_head *a, struct mbuf_head *b)
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{
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if (a->tail)
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a->tail->m_nextpkt = b->head;
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if (b->tail)
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a->tail = b->tail;
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a->qlen += b->qlen;
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a->qsize += b->qsize;
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}
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#endif /* CXGB_MBUFQ_H_ */
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