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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_configuration_instance_delete PORTABLE C */
/* 6.2.0 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function will delete a configuration instance. It does not */
/* delete configuration container but it deletes all the alternate */
/* current alternate settings for each interface it owns. */
/* */
/* INPUT */
/* */
/* configuration Pointer to configuration */
/* */
/* OUTPUT */
/* */
/* Completion Status */
/* */
/* CALLS */
/* */
/* _ux_host_stack_interface_instance_delete Delete interface instance */
/* */
/* CALLED BY */
/* */
/* USBX Components */
/* */
/**************************************************************************/
VOID _ux_host_stack_configuration_instance_delete(UX_CONFIGURATION *configuration)
{
UX_INTERFACE *interface_ptr;
ULONG current_alternate_setting;
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_STACK_CONFIGURATION_INSTANCE_DELETE, configuration, 0, 0, 0, UX_TRACE_HOST_STACK_EVENTS, 0, 0)
/* Obtain the first interface for this configuration. */
interface_ptr = configuration -> ux_configuration_first_interface;
/* In order to keep the compiler happy, we reset the alternate setting. */
current_alternate_setting = 0;
/* Each selected alternate setting for each interface must be deleted. */
while (interface_ptr != UX_NULL)
{
/* If this is the first alternate setting, the current alternate setting is maintained here. */
if (interface_ptr -> ux_interface_descriptor.bAlternateSetting == 0)
{
current_alternate_setting = interface_ptr -> ux_interface_current_alternate_setting;
}
if (interface_ptr -> ux_interface_descriptor.bAlternateSetting == current_alternate_setting)
{
#if UX_HOST_STACK_CONFIGURATION_INSTANCE_CREATE_CONTROL == UX_HOST_STACK_CONFIGURATION_INSTANCE_CREATE_OWNED
/* If interface is usable, remove physical creates. */
if (interface_ptr -> ux_interface_class || configuration -> ux_configuration_device -> ux_device_class)
#endif
_ux_host_stack_interface_instance_delete(interface_ptr);
}
interface_ptr = interface_ptr -> ux_interface_next_interface;
}
return;
}
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