device_resource_if-h.md - Openharmony v1.0 / docs / docs-en / api / api-SmartVision-Devices - 最全华为鸿蒙分布式操作系统技术资料库，手册，指南

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device_resource_if-h.md

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Openharmony v1.0 / docs / docs-en / api / api-SmartVision-Devices

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# device\_resource\_if.h
## **Overview**
**Related Modules:**
[DriverConfig](driverconfig.md)
**Description:**
Declares the API for querying the configuration tree.
**Since:**
1.0
**Version:**
1.0
## **Summary**
## Data Structures

Data Structure Name	Description
DeviceResourceAttr	Defines the attributes of a tree node in the configuration tree.
DeviceResourceNode	Defines a tree node in the configuration tree.
DeviceResourceIface	Provides functions for obtaining information about the device resource configuration tree.

## Macros

Macro Name and Value	Description
DEV_RES_NODE_FOR_EACH_ATTR(node, attr) for ((attr) = (node)->attrData; (attr) != NULL; (attr) = (attr)->next)	Traverses the attributes of the current configuration tree node.
DEV_RES_NODE_FOR_EACH_CHILD_NODE(node, childNode) for ((childNode) = (node)->child; (childNode) != NULL; (childNode) = (childNode)->sibling)	Traverses the child nodes of the current configuration tree node.

## Enumerations

Enumeration Name	Description
DeviceResourceType { HDF_CONFIG_SOURCE = 0, INVALID }	Enumerates configuration file types.

## Functions

Function Name	Description
DeviceResourceGetIfaceInstance (DeviceResourceType type)	struct DeviceResourceIface * Obtains the device resource interface handle of the corresponding configuration tree type.

Function Name

Description

DeviceResourceGetIfaceInstance (DeviceResourceType type)

struct DeviceResourceIface *

Obtains the device resource interface handle of the corresponding configuration tree type.