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High Performance OPC UA Server SDK
1.2.0.193
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High Performance OPC UA Server SDK
1.2.0.193
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Contains elements that describe changes of the model. More...
#include <modelchangestructuredatatype.h>
Data Fields | |
| struct ua_nodeid | affected |
| NodeId of the Node that was changed. More... | |
| struct ua_nodeid | affected_type |
| If the affected Node was an object or Variable, affectedType contains the NodeId of the TypeDefinitionNode of the affected Node. More... | |
| uint8_t | verb |
| Describes the changes happening to the affected Node. More... | |
Related Functions | |
| void | ua_modelchangestructuredatatype_init (struct ua_modelchangestructuredatatype *t) |
| Initialize an ua_modelchangestructuredatatype struct with a valid value. More... | |
| void | ua_modelchangestructuredatatype_clear (struct ua_modelchangestructuredatatype *t) |
| Clear all resources alloctated in an ua_modelchangestructuredatatype struct. More... | |
| int | ua_modelchangestructuredatatype_compare (const struct ua_modelchangestructuredatatype *a, const struct ua_modelchangestructuredatatype *b) |
| Compare two ua_modelchangestructuredatatype structs. More... | |
| int | ua_modelchangestructuredatatype_copy (struct ua_modelchangestructuredatatype *dst, const struct ua_modelchangestructuredatatype *src) |
| Create a copy of a ua_modelchangestructuredatatype struct. More... | |
Contains elements that describe changes of the model.
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Clear all resources alloctated in an ua_modelchangestructuredatatype struct.
Frees allocated memory like arrays and resets numeric values. The ua_modelchangestructuredatatype struct itself is not freed and must be freed by the caller if required. This function always succeeds for a valid ua_modelchangestructuredatatype struct, that was validly decoded, initilized by ua_modelchangestructuredatatype_init or created with ua_modelchangestructuredatatype_copy.
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Compare two ua_modelchangestructuredatatype structs.
Compares the content of the ua_modelchangestructuredatatype struct a to the content of the ua_modelchangestructuredatatype struct b. If a is smaller than b, an integer less than zero is returned, if a is bigger than b, an integer greater than zero is returned. If both structs are equal zero is returned.
This function creates a total order on ua_modelchangestructuredatatype structs, so it is well suited to not only determine equality, but also sort multiple instances of this struct.
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Create a copy of a ua_modelchangestructuredatatype struct.
Copy all fields from struct ua_modelchangestructuredatatype src to dst. Creates a deep copy so all content is recusively copied and both src and dst can be used and must be freed separately.
dst is not cleared before the copy operation, so it must not have any allocated data. It may or may not be initilized by the caller before copy.
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Initialize an ua_modelchangestructuredatatype struct with a valid value.
After initialization the fields of the struct are set to valid and consistent values and can safley be accessed. An initialized ua_modelchangestructuredatatype struct can also be passed to ua_modelchangestructuredatatype_compare, ua_modelchangestructuredatatype_copy and ua_modelchangestructuredatatype_clear. This function will always succeed as long as an ua_modelchangestructuredatatype struct is passed to it.
| affected |
NodeId of the Node that was changed.
The client should assume that the affected Node has been created or deleted, had a Reference added or deleted, or the DataType has changed as described by the verb.
| affected_type |
If the affected Node was an object or Variable, affectedType contains the NodeId of the TypeDefinitionNode of the affected Node.
Otherwise it is set to null.
| verb |
Describes the changes happening to the affected Node.
The verb is an 8-bit unsigned integer used as bit mask with the structure defined in the following table:
| Field | Bit | Description |
|---|---|---|
| NodeAdded | 0 | Indicates the affected Node has been added. |
| NodeDeleted | 1 | Indicates the affected Node has been deleted. |
| ReferenceAdded | 2 | Indicates a Reference has been added. The affected Node may be either a SourceNode or TargetNode. Note that an added bidirectional Reference is reflected by two ChangeStructures. |
| ReferenceDeleted | 3 | Indicates a Reference has been deleted. The affected Node may be either a SourceNode or TargetNode. Note that a deleted bidirectional Reference is reflected by two ChangeStructures. |
| DataTypeChanged | 4 | This verb may be used only for affected Nodes that are Variables or VariableTypes. It indicates that the DataType Attribute has changed. |
| Reserved | 5:7 | Reserved for future use. Shall always be zero. |
A verb may identify several changes on the affected Node at once. This feature should be used if event compression is used.
Note that all verbs shall always be considered in the context where the ModelChangeStructureDataType is used. A NodeDeleted may indicate that a Node was removed from a view but still exists in other Views.