nuttx/mm/iob/iob_get_queue_info.c

/****************************************************************************
 * mm/iob/iob_get_queue_info.c
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.  The
 * ASF licenses this file to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance with the
 * License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
 * License for the specific language governing permissions and limitations
 * under the License.
 *
 ****************************************************************************/

/****************************************************************************
 * Included Files
 ****************************************************************************/

#include <nuttx/config.h>
#include <nuttx/mm/iob.h>
#include "iob.h"

#if CONFIG_IOB_NCHAINS > 0

/****************************************************************************
 * Public Functions
 ****************************************************************************/

/****************************************************************************
 * Name: iob_get_queue_size
 *
 * Description:
 *   Queue helper for get the iob queue buffer size.
 *
 ****************************************************************************/

unsigned int iob_get_queue_size(FAR struct iob_queue_s *queue)
{
  FAR struct iob_qentry_s *iobq;
  unsigned int total = 0;
  FAR struct iob_s *iob;

  for (iobq = queue->qh_head; iobq != NULL; iobq = iobq->qe_flink)
    {
      iob = iobq->qe_head;
      total += iob->io_pktlen;
    }

  return total;
}

/****************************************************************************
 * Name: iob_get_queue_entry_count
 *
 * Description:
 *   Queue helper for get the iob queue entry count.
 *
 ****************************************************************************/

unsigned int iob_get_queue_entry_count(FAR struct iob_queue_s *queue)
{
  FAR struct iob_qentry_s *iobq;
  unsigned int count;

  for (iobq = queue->qh_head, count = 0; iobq != NULL;
       iobq = iobq->qe_flink, count++);

  return count;
}

#endif /* CONFIG_IOB_NCHAINS > 0 */