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#ifndef MAC_MCPS_PURGE_H_INCLUDED
#define MAC_MCPS_PURGE_H_INCLUDED

#if (CONFIG_PURGE_ENABLED == 1)

#include <stdint.h>
#include "mac_common.h"
#include "mac_task_scheduler.h"

/** @file
 * The MAC Purge module declares the MAC Purge routines and necessary types
 * according to the MAC specification.
 *
 * @defgroup mac_purge MAC MCPS Purge API
 * @ingroup mac_15_4
 * @{
 * @brief Module to declare MAC MCPS Purge API.
 * @details The MAC MCPS Purge module declares the MAC Purge routines and necessary types according to
 * the MAC specification. More specifically, MAC purge request mcps_purge_req(), and the
 * confirmation callback typedef is declared as mcps_purge_conf_cb_t. An additional primitive
 * not covered by the standard is declared. This is mpcs_purge() which is a synchronous version
 * of mcps_purge_req().
 */

/**
 * @brief   MCPS-PURGE.confirm.
 *
 * @details The MCPS-PURGE.confirm primitive allows the MAC sublayer to notify the next higher layer
 * of the success of its request to purge an MSDU from the transaction queue.
 *
 * In accordance with IEEE Std 802.15.4-2006, section 7.1.1.5.
 */
typedef struct
{
    /** The handle of the MSDU to be purged from the transaction queue. */
    uint8_t        msdu_handle;

    /** The status of the request to be purged an MSDU from the transaction queue. */
    mac_status_t   status;
} mcps_purge_conf_t;


/**
 * @brief   MCPS-PURGE.request.
 *
 * @details The MCPS-PURGE.request primitive allows the next higher layer
 * to purge an MSDU from the transaction queue.
 *
 * In accordance with IEEE Std 802.15.4-2006, section 7.1.1.4.
 */
typedef struct
{
    /** Do not edit this field. */
    mac_abstract_req_t  service;

    /** Confirmation to this request. */
    mcps_purge_conf_t   confirm;

    /** The handle of the MSDU to be purged from the transaction queue. */
    uint8_t       msdu_handle;
} mcps_purge_req_t;


/**
 * @brief   Confirmation function.
 *
 * @details The MCPS-PURGE.confirm primitive is generated by the MAC sublayer
 * entity in response to an MCPS-PURGE.request primitive. The MCPS-PURGE.confirm
 * primitive returns a status of either SUCCESS, indicating that the purge request
 * was successful, or INVALID_HANDLE, indicating an error.
 * The status values are fully described in 7.1.1.4.3.
 *
 * @param Pointer to confirmation primitive.
 */
typedef void (* mcps_purge_conf_cb_t)(mcps_purge_conf_t *);


/**
 * @brief   MCPS-PURGE.request service.
 *
 * @details The MCPS-PURGE.request primitive is generated by the next higher layer
 * whenever an MSDU is to be purged from the transaction queue.
 * After request completion, user callback will be issued with
 * valid data stored in structure mcps_purge_conf_t.
 *
 * @param req     Pointer to MCPS-PURGE request structure.
 * @param conf_cb Pointer to the confirmation function (user callback).
 *
 * In accordance with IEEE Std 802.15.4-2006, section 7.1.1.4.
 */
void mcps_purge_req(mcps_purge_req_t * req, mcps_purge_conf_cb_t conf_cb);

/**
 * @brief   Performs MCPS-PURGE.request directly (without request - confirm approach).
 *
 * @details Optional. Not covered by the standard.
 *
 * The MCPS-PURGE.request primitive is generated by the next higher layer
 * whenever an MSDU is to be purged from the transaction queue.
 *
 * @param req Pointer to MCPS-PURGE request structure.
 *
 * @return Result of the purge procedure.
 */
mac_status_t mcps_purge(mcps_purge_req_t * req);

/** @} */

#endif // (CONFIG_PURGE_ENABLED == 1)

#endif // MAC_MCPS_PURGE_H_INCLUDED
