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NET: Important fix to the read-ahead buffer queue managment: Consumed bytes were being trimmed from the head of the queue, but the queue head itself was not being updated. From Rony XLN

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This commit is contained in:
Gregory Nutt 2014-07-07 07:28:17 -06:00
parent e89eac6365
commit 178b2b0cbe
4 changed files with 155 additions and 4 deletions
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23
include/nuttx/net/iob.h
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@ -249,7 +249,9 @@ FAR struct iob_s *iob_remove_queue(FAR struct iob_queue_s *iobq);
*
****************************************************************************/
#if CONFIG_IOB_NCHAINS > 0
FAR struct iob_s *iob_peek_queue(FAR struct iob_queue_s *iobq);
#endif
/****************************************************************************
* Name: iob_free_queue
@ -318,6 +320,27 @@ void iob_concat(FAR struct iob_s *iob1, FAR struct iob_s *iob2);
FAR struct iob_s *iob_trimhead(FAR struct iob_s *iob, unsigned int trimlen);
/****************************************************************************
* Name: iob_trimhead_queue
*
* Description:
* Remove bytes from the beginning of an I/O chain at the head of the
* queue. Emptied I/O buffers are freed and, hence, the head of the
* queue may change.
*
* This function is just a wrapper around iob_trimhead() that assures that
* the iob at the head of queue is modified with the trimming operations.
*
* Returned Value:
* The new iob at the head of the queue is returned.
*
****************************************************************************/
#if CONFIG_IOB_NCHAINS > 0
FAR struct iob_s *iob_trimhead_queue(FAR struct iob_queue_s *qhead,
unsigned int trimlen);
#endif
/****************************************************************************
* Name: iob_trimtail
*