101 lines
3.0 KiB
C
101 lines
3.0 KiB
C
/****************************************************************************
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* wireless/ieee802154/mac802154_bind.c
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*
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* SPDX-License-Identifier: Apache-2.0
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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 <stdlib.h>
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#include <errno.h>
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#include "mac802154.h"
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#include "mac802154_internal.h"
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#include <nuttx/wireless/ieee802154/ieee802154_mac.h>
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: mac802154_bind
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*
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* Description:
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* Bind the MAC callback table to the MAC state.
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*
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* Input Parameters:
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* mac - Reference to the MAC driver state structure
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* cb - MAC callback operations
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*
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* Returned Value:
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* OK on success; Negated errno on failure.
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*
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****************************************************************************/
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int mac802154_bind(MACHANDLE mac, FAR struct mac802154_maccb_s *cb)
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{
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FAR struct ieee802154_privmac_s *priv =
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(FAR struct ieee802154_privmac_s *)mac;
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FAR struct mac802154_maccb_s *next;
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FAR struct mac802154_maccb_s *prev;
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/* Add the MAC client callback structure to the list of MAC callbacks in
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* priority order.
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*
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* Search the list to find the location to insert the new instance.
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* The list is maintained in descending priority order.
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*/
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for (prev = NULL, next = priv->cb;
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(next != NULL && cb->prio <= next->prio);
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prev = next, next = next->flink);
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/* Add the instance to the spot found in the list. Check if the instance
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* goes at the head of the list.
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*/
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if (prev == NULL)
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{
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cb->flink = priv->cb; /* May be NULL */
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priv->cb = cb;
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}
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/* No.. the instance goes between prev and next */
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else
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{
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cb->flink = next; /* May be NULL */
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prev->flink = cb;
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}
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/* Keep track of the number of clients requesting notification */
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if (cb->notify != NULL)
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{
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priv->nclients++;
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}
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return OK;
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}
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