/***************************************************************************
 * Copyright (c) 2024 Microsoft Corporation
 * Copyright (c) 2026-present Eclipse ThreadX contributors
 *
 * This program and the accompanying materials are made available under the
 * terms of the MIT License which is available at
 * https://opensource.org/licenses/MIT.
 *
 * SPDX-License-Identifier: MIT
 **************************************************************************/


/**************************************************************************/
/**************************************************************************/
/**                                                                       */
/** USBX Component                                                        */
/**                                                                       */
/**   Pictbridge Application                                              */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/


/* Include necessary system files.  */

#define UX_SOURCE_CODE

#include "ux_api.h"
#include "ux_pictbridge.h"
#include "ux_host_class_pima.h"


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _ux_pictbridge_dpshost_notification_callback        PORTABLE C      */
/*                                                           6.1.12       */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Chaoqiong Xiao, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function gets a notification of an event and passes it to      */
/*    a pictbridge thread.                                                */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    pima_event                             Event notification structure */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    Completion Status                                                   */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    user application                                                    */
/*                                                                        */
/**************************************************************************/
VOID  _ux_pictbridge_dpshost_notification_callback(UX_HOST_CLASS_PIMA_EVENT *pima_event)
{

UX_HOST_CLASS_PIMA      *pima;
UX_PICTBRIDGE           *pictbridge;
UX_PICTBRIDGE_EVENT     *pictbridge_next_event;
UX_PICTBRIDGE_EVENT     *pictbridge_event;

    /* Get the pointer to the Pima instance.  */
    pima = pima_event -> ux_host_class_pima_event_pima_instance;

    /* Get the pointer to the Pictbridge application.  */
    pictbridge = (UX_PICTBRIDGE *) pima -> ux_host_class_pima_application;

    /* Compute the next entry in the event array.  */
    if ((pictbridge -> ux_pictbridge_event_array_head + 1) == pictbridge -> ux_pictbridge_event_array_end)

        /* Start at the beginning of the list.  */
        pictbridge_next_event = pictbridge -> ux_pictbridge_event_array;
    else

        /* Point to the next entry in the event array.  */
        pictbridge_next_event = pictbridge -> ux_pictbridge_event_array_head + 1;

    /* Check to see if we can store this event.  */
    if (pictbridge_next_event == pictbridge -> ux_pictbridge_event_array_tail)

        /* No place to store this event, throw it away.  */
        return;

    /* Current storage is in the current head.  */
    pictbridge_event =  pictbridge -> ux_pictbridge_event_array_head;

    /* Store the event in the pictbridge event queue.  */
    pictbridge_event -> ux_pictbridge_event_code            =   pima_event -> ux_host_class_pima_event_code;
    pictbridge_event -> ux_pictbridge_event_parameter_1     =   pima_event -> ux_host_class_pima_event_parameter_1;
    pictbridge_event -> ux_pictbridge_event_parameter_2     =   pima_event -> ux_host_class_pima_event_parameter_2;
    pictbridge_event -> ux_pictbridge_event_parameter_3     =   pima_event -> ux_host_class_pima_event_parameter_3;

    /* Advance the pictbridge event queue head.  */
    pictbridge -> ux_pictbridge_event_array_head    = pictbridge_next_event;

    /* Wake up the Pictbridge notification handler thread.  */
    _ux_system_semaphore_put(&pictbridge -> ux_pictbridge_notification_semaphore);

    /* We are done.  */
    return;

}