101 lines
3.0 KiB
C
101 lines
3.0 KiB
C
/****************************************************************************
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* mm/iob/iob_free_queue_qentry.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <nuttx/config.h>
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#include <assert.h>
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#include <nuttx/irq.h>
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#include <nuttx/arch.h>
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#include <nuttx/mm/iob.h>
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#include "iob.h"
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#if CONFIG_IOB_NCHAINS > 0
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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#ifndef NULL
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# define NULL ((FAR void *)0)
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#endif
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: iob_free_queue_qentry
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*
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* Description:
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* Free an iob entire queue of I/O buffer chains.
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*
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****************************************************************************/
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void iob_free_queue_qentry(FAR struct iob_s *iob,
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FAR struct iob_queue_s *iobq,
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enum iob_user_e producerid)
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{
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FAR struct iob_qentry_s *prev = NULL;
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FAR struct iob_qentry_s *qentry;
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irqstate_t flags = enter_critical_section();
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for (qentry = iobq->qh_head; qentry != NULL;
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prev = qentry, qentry = qentry->qe_flink)
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{
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/* Find head of the I/O buffer chain */
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if (qentry->qe_head == iob)
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{
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if (prev == NULL)
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{
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iobq->qh_head = qentry->qe_flink;
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}
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else
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{
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prev->qe_flink = qentry->qe_flink;
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}
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if (iobq->qh_tail == qentry)
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{
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iobq->qh_tail = prev;
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}
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/* Remove the queue container */
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iob_free_qentry(qentry);
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/* Free the I/O chain */
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iob_free_chain(iob, producerid);
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break;
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}
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}
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leave_critical_section(flags);
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}
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#endif /* CONFIG_IOB_NCHAINS > 0 */
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