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/*************************************************************************** |
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* Copyright (c) 2024 Microsoft Corporation |
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* Copyright (c) 2026-present Eclipse ThreadX contributors |
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* |
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* This program and the accompanying materials are made available under the |
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* terms of the MIT License which is available at |
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* https://opensource.org/licenses/MIT. |
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* |
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* SPDX-License-Identifier: MIT |
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**************************************************************************/ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/** */ |
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/** USBX Component */ |
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/** */ |
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/** Host Stack */ |
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/** */ |
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/**************************************************************************/ |
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/**************************************************************************/ |
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/* Include necessary system files. */ |
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#define UX_SOURCE_CODE |
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#include "ux_api.h" |
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#include "ux_host_stack.h" |
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/**************************************************************************/ |
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/* */ |
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/* FUNCTION RELEASE */ |
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/* */ |
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/* _ux_host_stack_configuration_instance_delete PORTABLE C */ |
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/* 6.2.0 */ |
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/* AUTHOR */ |
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/* */ |
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/* Chaoqiong Xiao, Microsoft Corporation */ |
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/* */ |
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/* DESCRIPTION */ |
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/* */ |
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/* This function will delete a configuration instance. It does not */ |
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/* delete configuration container but it deletes all the alternate */ |
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/* current alternate settings for each interface it owns. */ |
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/* */ |
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/* INPUT */ |
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/* */ |
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/* configuration Pointer to configuration */ |
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/* */ |
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/* OUTPUT */ |
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/* */ |
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/* Completion Status */ |
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/* */ |
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/* CALLS */ |
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/* */ |
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/* _ux_host_stack_interface_instance_delete Delete interface instance */ |
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/* */ |
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/* CALLED BY */ |
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/* */ |
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/* USBX Components */ |
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/* */ |
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/**************************************************************************/ |
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VOID _ux_host_stack_configuration_instance_delete(UX_CONFIGURATION *configuration) |
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{ |
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UX_INTERFACE *interface_ptr; |
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ULONG current_alternate_setting; |
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/* If trace is enabled, insert this event into the trace buffer. */ |
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UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_STACK_CONFIGURATION_INSTANCE_DELETE, configuration, 0, 0, 0, UX_TRACE_HOST_STACK_EVENTS, 0, 0) |
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/* Obtain the first interface for this configuration. */ |
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interface_ptr = configuration -> ux_configuration_first_interface; |
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/* In order to keep the compiler happy, we reset the alternate setting. */ |
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current_alternate_setting = 0; |
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/* Each selected alternate setting for each interface must be deleted. */ |
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✓✓ |
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while (interface_ptr != UX_NULL) |
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{ |
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/* If this is the first alternate setting, the current alternate setting is maintained here. */ |
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✓✓ |
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if (interface_ptr -> ux_interface_descriptor.bAlternateSetting == 0) |
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{ |
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current_alternate_setting = interface_ptr -> ux_interface_current_alternate_setting; |
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} |
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✓✓ |
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if (interface_ptr -> ux_interface_descriptor.bAlternateSetting == current_alternate_setting) |
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{ |
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#if UX_HOST_STACK_CONFIGURATION_INSTANCE_CREATE_CONTROL == UX_HOST_STACK_CONFIGURATION_INSTANCE_CREATE_OWNED |
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/* If interface is usable, remove physical creates. */ |
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if (interface_ptr -> ux_interface_class || configuration -> ux_configuration_device -> ux_device_class) |
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#endif |
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_ux_host_stack_interface_instance_delete(interface_ptr); |
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} |
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interface_ptr = interface_ptr -> ux_interface_next_interface; |
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} |
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return; |
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} |
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