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Add macro IF_DEQUEUE_ALL(ifq, m), that takes the entire mbuf chain off

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the queue. It can be utilized in queue processing to avoid multiple
locking/unlocking.
This commit is contained in:
Gleb Smirnoff 2011-10-27 09:45:12 +00:00
parent e5fe87b387
commit a0af7c3edb
1 changed files with 12 additions and 0 deletions
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12
sys/net/if_var.h
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@ -321,6 +321,18 @@ void if_maddr_runlock(struct ifnet *ifp); /* if_multiaddrs */
IF_UNLOCK(ifq); \
} while (0)
#define _IF_DEQUEUE_ALL(ifq, m) do { \
(m) = (ifq)->ifq_head; \
(ifq)->ifq_head = (ifq)->ifq_tail = NULL; \
(ifq)->ifq_len = 0; \
} while (0)
#define IF_DEQUEUE_ALL(ifq, m) do { \
IF_LOCK(ifq); \
_IF_DEQUEUE_ALL(ifq, m); \
IF_UNLOCK(ifq); \
} while (0)
#define _IF_POLL(ifq, m) ((m) = (ifq)->ifq_head)
#define IF_POLL(ifq, m) _IF_POLL(ifq, m)