63 lines
2.0 KiB
C
63 lines
2.0 KiB
C
/****************************************************************************
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* mm/iob/iob_concat.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 <string.h>
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#include <nuttx/mm/iob.h>
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#include "iob.h"
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: iob_concat
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*
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* Description:
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* Concatenate iob_s chain iob2 to iob1.
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*
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****************************************************************************/
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void iob_concat(FAR struct iob_s *iob1, FAR struct iob_s *iob2)
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{
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/* Combine the total packet size */
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iob1->io_pktlen += iob2->io_pktlen;
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iob2->io_pktlen = 0;
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/* Find the last buffer in the iob1 buffer chain */
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while (iob1->io_flink)
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{
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iob1 = iob1->io_flink;
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}
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/* Then connect iob2 buffer chain to the end of the iob1 chain */
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iob1->io_flink = iob2;
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}
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