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IF_DEQUEUE(9r)
NAME
  IF_DEQUEUE - Network: Removes an entry from the output queue

SYNOPSIS
  #include <net/if.h>


  IF_DEQUEUE(
	  struct ifqueue *ifq,
	  struct mbuf *m );

ARGUMENTS
  ifq Specifies a pointer to an ifqueue data structure.	 This data structure
      represents the output queue. Typically, a network driver's start
      interface references this queue through the if_snd member of the ifnet
      structure pointer.

  m   Specifies a pointer to an mbuf data structure.  This data structure
      contains the memory buffer information that IF_DEQUEUE() manipulates.

DESCRIPTION
  The IF_DEQUEUE() routine removes an entry from the front of the output
  queue. Specifically, IF_DEQUEUE() performs the following tasks:

    ·  Performs a simple lock on the entry in the queue.

    ·  Removes the entry from the queue by operating on various members of
       the ifqueue and mbuf structures. You do not need to understand the
       details of these operations.

    ·  Unlocks the simple lock on the entry in the queue.

NOTES
  You should raise the IPL to mask all LAN hardware interrupts by calling
  splimp() prior to calling the IF_DEQUEUE() routine.

RETURN VALUES
  None

FILES
  <if.h>






SEE ALSO
  Routines: IF_ENQUEUE(9r), IF_PREPEND(9r)

Index for Section 9

Alphabetical listing for I

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