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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_new_configuration_create PORTABLE C */
/* 6.1 */
/* AUTHOR */
/* */
/* Chaoqiong Xiao, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function creates a new configuration for the current device */
/* a device can have multiple configurations. */
/* */
/* INPUT */
/* */
/* device Pointer to the descriptor */
/* for the device */
/* configuration_descriptor Configuration descriptor */
/* previously parsed */
/* */
/* OUTPUT */
/* */
/* None */
/* */
/* CALLS */
/* */
/* None */
/* */
/* CALLED BY */
/* */
/* USBX Components */
/* */
/**************************************************************************/
VOID _ux_host_stack_new_configuration_create(UX_DEVICE *device, UX_CONFIGURATION *configuration)
{
UX_CONFIGURATION *list_configuration;
/* If trace is enabled, insert this event into the trace buffer. */
UX_TRACE_IN_LINE_INSERT(UX_TRACE_HOST_STACK_NEW_CONFIGURATION_CREATE, device, configuration, 0, 0, UX_TRACE_HOST_STACK_EVENTS, 0, 0)
/* The device that owns this configuration is memorized in the
configuration container itself, easier for back chaining. */
configuration -> ux_configuration_device = device;
/* Save the configuration handle in the container, this is for ensuring the
configuration container is not corrupted. */
configuration -> ux_configuration_handle = (ULONG) (ALIGN_TYPE) configuration;
/* There is 2 cases for the creation of the configuration descriptor
if this is the first one, the configuration descriptor is hooked
to the device. If it is not the first one, the configuration is
hooked to the end of the chain of configurations. */
if (device -> ux_device_first_configuration == UX_NULL)
{
device -> ux_device_first_configuration = configuration;
}
else
{
/* Get the pointer to the first configuration. */
list_configuration = device -> ux_device_first_configuration;
/* And traverse until we have reached the end of the configuration list. */
while (list_configuration -> ux_configuration_next_configuration != UX_NULL)
{
list_configuration = list_configuration -> ux_configuration_next_configuration;
}
/* Hook the new configuration. */
list_configuration -> ux_configuration_next_configuration = configuration;
}
/* Return to caller. */
return;
}
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