common/usbx_host_classes/src/ux_host_class_hid_mouse_wheel_get.c


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/***************************************************************************
 * 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                                                        */
/**                                                                       */
/**   HID Mouse Client Class                                              */
/**                                                                       */
/**************************************************************************/
/**************************************************************************/


/* Include necessary system files.  */

#define UX_SOURCE_CODE

#include "ux_api.h"
#include "ux_host_class_hid.h"
#include "ux_host_class_hid_mouse.h"
#include "ux_host_stack.h"


/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _ux_host_class_hid_mouse_wheel_get                  PORTABLE C      */
/*                                                           6.1          */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Chaoqiong Xiao, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function reads the mouse wheel position (up or down).          */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    mouse_instance                        Pointer to mouse instance     */
/*    mouse_wheel_movement                  Current Mouse wheel movement  */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    Completion Status                                                   */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    None                                                                */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    HID Mouse Class                                                     */
/*                                                                        */
/**************************************************************************/
UINT  _ux_host_class_hid_mouse_wheel_get(UX_HOST_CLASS_HID_MOUSE *mouse_instance,
                                            SLONG *mouse_wheel_movement)
{

UX_HOST_CLASS_HID   *hid;

    /* Get the HID class associated with the HID client. */
    hid = mouse_instance -> ux_host_class_hid_mouse_hid;

    /* Ensure the instance is valid.  */
    if (_ux_host_stack_class_instance_verify(_ux_system_host_class_hid_name, (VOID *) hid) != UX_SUCCESS)
    {

        /* Error trap. */
        _ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_CLASS, UX_HOST_CLASS_INSTANCE_UNKNOWN);

        /* If trace is enabled, insert this event into the trace buffer.  */
        UX_TRACE_IN_LINE_INSERT(UX_TRACE_ERROR, UX_HOST_CLASS_INSTANCE_UNKNOWN, hid, 0, 0, UX_TRACE_ERRORS, 0, 0)

        return(UX_HOST_CLASS_INSTANCE_UNKNOWN);
    }

    /* Report the mouse wheel movement.  */
    *mouse_wheel_movement = (SLONG)(mouse_instance -> ux_host_class_hid_mouse_wheel);

    /* The status will tell the application there is something valid in the usage/value.  */
    return(UX_SUCCESS);
}

/**************************************************************************/
/*                                                                        */
/*  FUNCTION                                               RELEASE        */
/*                                                                        */
/*    _uxe_host_class_hid_mouse_wheel_get                 PORTABLE C      */
/*                                                           6.3.0        */
/*  AUTHOR                                                                */
/*                                                                        */
/*    Chaoqiong Xiao, Microsoft Corporation                               */
/*                                                                        */
/*  DESCRIPTION                                                           */
/*                                                                        */
/*    This function checks errors in HID mouse wheel get function call.   */
/*                                                                        */
/*  INPUT                                                                 */
/*                                                                        */
/*    mouse_instance                        Pointer to mouse instance     */
/*    mouse_wheel_movement                  Current Mouse wheel movement  */
/*                                                                        */
/*  OUTPUT                                                                */
/*                                                                        */
/*    Status                                                              */
/*                                                                        */
/*  CALLS                                                                 */
/*                                                                        */
/*    _ux_host_class_hid_mouse_wheel_get    Get mouse wheel               */
/*                                                                        */
/*  CALLED BY                                                             */
/*                                                                        */
/*    Application                                                         */
/*                                                                        */
/**************************************************************************/
UINT  _uxe_host_class_hid_mouse_wheel_get(UX_HOST_CLASS_HID_MOUSE *mouse_instance,
                                            SLONG *mouse_wheel_movement)
{

    /* Sanity checks.  */
    if ((mouse_instance == UX_NULL) || (mouse_wheel_movement == UX_NULL))
        return(UX_INVALID_PARAMETER);

    /* Invoke mouse wheel get function.  */
    return(_ux_host_class_hid_mouse_wheel_get(mouse_instance, mouse_wheel_movement));
}