117 lines
3.9 KiB
C
117 lines
3.9 KiB
C
/****************************************************************************
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* wireless/ieee802154/mac802154_bind.c
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*
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* Copyright (C) 2017 Gregory Nutt. All rights reserved.
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* Copyright (C) 2017 Verge Inc. All rights reserved.
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*
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* Author: Gregory Nutt <gnutt@nuttx.org>
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* Author: Anthony Merlino <anthony@vergeaero.com>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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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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