UaServerMonitoredItemManager

Functions
OpcUa_StatusCode	UaServer_ItemChanged (UaServer_MonitoredItem *a_pMonitoredItem)
	Informs the SDK that an item has changed. More...
OpcUa_StatusCode	UaServer_NewItemValue (UaServer_MonitoredItemData *a_pMonitoredItemData, OpcUa_DataValue *a_pValue)
	Informs about the current value of the monitored item. More...
OpcUa_StatusCode	UaServer_MonitoredItemData_Lock (UaServer_MonitoredItemData *a_pMonitoredItem)
	Locks the access to the value queue of a monitored item. More...
OpcUa_StatusCode	UaServer_MonitoredItemData_Unlock (UaServer_MonitoredItemData *a_pMonitoredItem)
	Unlocks the access to the value queue of a monitored item. More...

Detailed Description

Function Documentation

OpcUa_StatusCode UaServer_ItemChanged

(

UaServer_MonitoredItem *

a_pMonitoredItem

)

Informs the SDK that an item has changed.

Note

This function is not thread-safe, it is recommended to use UaServer_NewItemValue instead. To use this function nevertheless if the check for changes should not be done by the SDK, use UaServer_MonitoredItemData_Lock and UaServer_MonitoredItemData_Unlock to lock the monitored item while accessing the item's queue.

Parameters

a_pMonitoredItem

The item which has changed.

Returns

OpcUa_Good on success.

OpcUa_StatusCode UaServer_MonitoredItemData_Lock

(

UaServer_MonitoredItemData *

a_pMonitoredItem

)

Locks the access to the value queue of a monitored item.

This function was introduced in V1.4.0.

Note

This function is thread-safe.

Parameters

a_pMonitoredItem

The item to lock.

Returns

OpcUa_Good on success.

OpcUa_StatusCode UaServer_MonitoredItemData_Unlock

(

UaServer_MonitoredItemData *

a_pMonitoredItem

)

Unlocks the access to the value queue of a monitored item.

This function was introduced in V1.4.0.

Note

This function is thread-safe.

Parameters

a_pMonitoredItem

The item to lock.

Returns

OpcUa_Good on success.

OpcUa_StatusCode UaServer_NewItemValue	(	UaServer_MonitoredItemData *	a_pMonitoredItemData,
		OpcUa_DataValue *	a_pValue
	)

Informs about the current value of the monitored item.

The SDK does the data change detection and informs the subscription about changed data if necessary.

This function was introduced in V1.3.0.

Note

This function is thread-safe.

Parameters

a_pMonitoredItemData	The item which has changed.
a_pValue	The current value of the item. The SDK takes the ownership of this argument and will free it if it's not longer needed.

Returns

OpcUa_Good on success.