High Performance OPC UA Server SDK
1.2.0.193
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Data Fields | |
enum ua_datachangetrigger | trigger |
uint32_t | deadband_type |
double | deadband_value |
Related Functions | |
void | ua_datachangefilter_init (struct ua_datachangefilter *t) |
Initialize an ua_datachangefilter struct with a valid value. More... | |
void | ua_datachangefilter_clear (struct ua_datachangefilter *t) |
Clear all resources alloctated in an ua_datachangefilter struct. More... | |
int | ua_datachangefilter_compare (const struct ua_datachangefilter *a, const struct ua_datachangefilter *b) |
Compare two ua_datachangefilter structs. More... | |
int | ua_datachangefilter_copy (struct ua_datachangefilter *dst, const struct ua_datachangefilter *src) |
Create a copy of a ua_datachangefilter struct. More... | |
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related |
Clear all resources alloctated in an ua_datachangefilter struct.
Frees allocated memory like arrays and resets numeric values. The ua_datachangefilter struct itself is not freed and must be freed by the caller if required. This function always succeeds for a valid ua_datachangefilter struct, that was validly decoded, initilized by ua_datachangefilter_init or created with ua_datachangefilter_copy.
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related |
Compare two ua_datachangefilter structs.
Compares the content of the ua_datachangefilter struct a
to the content of the ua_datachangefilter 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_datachangefilter 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_datachangefilter struct.
Copy all fields from struct ua_datachangefilter 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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related |
Initialize an ua_datachangefilter 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_datachangefilter struct can also be passed to ua_datachangefilter_compare, ua_datachangefilter_copy and ua_datachangefilter_clear. This function will always succeed as long as an ua_datachangefilter struct is passed to it.