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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 */
/** */
/** Host Stack */
/** */
/**************************************************************************/
/**************************************************************************/
/* Include necessary system files. */
#define UX_SOURCE_CODE
#include "ux_api.h"
#include "ux_host_stack.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _ux_host_stack_class_instance_destroy PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function destroys a class instance for a class container. */
/* */
/* INPUT */
/* */
/* class Pointer to class */
/* class_instance Pointer to class instance */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* Application */
/* USBX Components */
/* */
/**************************************************************************/
UINT _ux_host_stack_class_instance_destroy(UX_HOST_CLASS *host_class, VOID *class_instance)
{
VOID **current_class_instance;
VOID **next_class_instance;
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_STACK_CLASS_INSTANCE_DESTROY, host_class, class_instance, 0, 0, UX_TRACE_HOST_STACK_EVENTS, 0, 0)
/* If trace is enabled, register this object. */
UX_TRACE_OBJECT_UNREGISTER(class_instance);
/* Get the pointer to the instance pointed by the instance to destroy. */
next_class_instance = class_instance;
next_class_instance = *next_class_instance;
/* Start with the first class instance attached to the class container. */
current_class_instance = host_class -> ux_host_class_first_instance;
/* Check if there are any instances attached. */
if (current_class_instance == UX_NULL)
{
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_ENUMERATOR, 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, class_instance, 0, 0, UX_TRACE_ERRORS, 0, 0)
return(UX_HOST_CLASS_INSTANCE_UNKNOWN);
}
/* The first instance is a special case because it is attached to the class
container. */
if (current_class_instance == class_instance)
{
/* Point to next class instance. */
host_class -> ux_host_class_first_instance = next_class_instance;
/* Return success. */
return(UX_SUCCESS);
}
/* Traverse the list of the class instances until we found the right one. */
while (*current_class_instance != UX_NULL)
{
/* Check to see if this class is the one we need to destroy. */
if(*current_class_instance == class_instance)
{
/* Point to next class instance. */
*current_class_instance = next_class_instance;
/* Return success. */
return(UX_SUCCESS);
}
/* Points to the next class instance. */
current_class_instance = *current_class_instance;
}
/* Error trap. */
_ux_system_error_handler(UX_SYSTEM_LEVEL_THREAD, UX_SYSTEM_CONTEXT_ENUMERATOR, 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, class_instance, 0, 0, UX_TRACE_ERRORS, 0, 0)
/* Return error to caller. */
return(UX_HOST_CLASS_INSTANCE_UNKNOWN);
}
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