94 lines
2.8 KiB
C
94 lines
2.8 KiB
C
/****************************************************************************
|
|
* mm/iob/iob_free_queue_qentry.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 <assert.h>
|
|
|
|
#include <nuttx/irq.h>
|
|
#include <nuttx/arch.h>
|
|
#include <nuttx/mm/iob.h>
|
|
|
|
#include "iob.h"
|
|
|
|
#if CONFIG_IOB_NCHAINS > 0
|
|
|
|
/****************************************************************************
|
|
* Public Functions
|
|
****************************************************************************/
|
|
|
|
/****************************************************************************
|
|
* Name: iob_free_queue_qentry
|
|
*
|
|
* Description:
|
|
* Free an iob entire queue of I/O buffer chains.
|
|
*
|
|
****************************************************************************/
|
|
|
|
void iob_free_queue_qentry(FAR struct iob_s *iob,
|
|
FAR struct iob_queue_s *iobq)
|
|
{
|
|
FAR struct iob_qentry_s *prev = NULL;
|
|
FAR struct iob_qentry_s *qentry;
|
|
|
|
irqstate_t flags = spin_lock_irqsave(&g_iob_lock);
|
|
for (qentry = iobq->qh_head; qentry != NULL;
|
|
prev = qentry, qentry = qentry->qe_flink)
|
|
{
|
|
/* Find head of the I/O buffer chain */
|
|
|
|
if (qentry->qe_head == iob)
|
|
{
|
|
if (prev == NULL)
|
|
{
|
|
iobq->qh_head = qentry->qe_flink;
|
|
}
|
|
else
|
|
{
|
|
prev->qe_flink = qentry->qe_flink;
|
|
}
|
|
|
|
if (iobq->qh_tail == qentry)
|
|
{
|
|
iobq->qh_tail = prev;
|
|
}
|
|
|
|
spin_unlock_irqrestore(&g_iob_lock, flags);
|
|
|
|
/* Remove the queue container */
|
|
|
|
iob_free_qentry(qentry);
|
|
|
|
/* Free the I/O chain */
|
|
|
|
iob_free_chain(iob);
|
|
|
|
return;
|
|
}
|
|
}
|
|
|
|
spin_unlock_irqrestore(&g_iob_lock, flags);
|
|
}
|
|
|
|
#endif /* CONFIG_IOB_NCHAINS > 0 */
|