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 *  @param first The first packet of the queue. Input parameter.
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 *  @param first The first packet of the queue. Input parameter.
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 *  @param packet_release The releasing function called for each of the packets after its detachment. Input parameter.
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 *  @param packet_release The releasing function called for each of the packets after its detachment. Input parameter.
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 */
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 */
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void    pq_destroy( packet_t first, void ( * packet_release )( packet_t packet ));
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void    pq_destroy( packet_t first, void ( * packet_release )( packet_t packet ));
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/** Returns the next packet in the queue.
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 *  @param packet The packet queue member. Input parameter.
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 *  @returns The next packet in the queue.
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 *  @returns NULL if there is no next packet.
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 *  @returns NULL if the packet is not valid.
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 */
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packet_t    pq_next( packet_t packet );
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/** Returns the previous packet in the queue.
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 *  @param packet The packet queue member. Input parameter.
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 *  @returns The previous packet in the queue.
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 *  @returns NULL if there is no previous packet.
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 *  @returns NULL if the packet is not valid.
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 */
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packet_t    pq_previous( packet_t packet );
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#endif
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#endif
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/** @}
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/** @}
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 */
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 */